|Year : 2019 | Volume
| Issue : 6 | Page : 243-249
Laboratory diagnosis of schistosomiasis mansoni: Current status and future trends
Amira Taman MSc, PhD , Samar N El-Beshbishi
Department of Medical Parasitology, Faculty of Medicine, Mansoura University, Mansoura 35516, Egypt
|Date of Submission||05-Feb-2019|
|Date of Decision||12-Apr-2019|
|Date of Acceptance||12-Jun-2019|
|Date of Web Publication||27-Jun-2019|
Associate professor, Department of Medical Parasitology, Faculty of Medicine, Mansoura University, 2 El-Gomhouria Street, Mansoura
Source of Support: None, Conflict of Interest: None
Schistosomiasis is a neglected tropical disease that affects about 290 million patients worldwide. Children aged between 5 and 14 years represent 45.8% of the affected patients, in addition, schistosomiasis has been reported in Schistosoma-free areas, mostly because of tourism and immigration from endemic countries. Intestinal schistosomiasis caused by Schistosoma mansoni is mainly diagnosed via direct stool examination for egg detection. Immunological methods are favoured for disease monitoring and preliminary checking for communities in areas with low infection rates, and for patients with light and chronic infections where parasitological tests are negative. PCR-based diagnostic techniques are more sensitive, but expensive. Tegument proteins and miRNAs are promising markers for diagnosis of schistosomiasis. Here we review the diagnostic methods for schistosomiasis mansoni aiming to reach a standardized technique for diagnosis of early infection to help better control of the disease.
Keywords: Schistosoma mansoni, ELISA, miRNA, Tegument, Polymerase chain reaction
|How to cite this article:|
Taman A, El-Beshbishi SN. Laboratory diagnosis of schistosomiasis mansoni: Current status and future trends. Asian Pac J Trop Med 2019;12:243-9
|How to cite this URL:|
Taman A, El-Beshbishi SN. Laboratory diagnosis of schistosomiasis mansoni: Current status and future trends. Asian Pac J Trop Med [serial online] 2019 [cited 2023 Jan 31];12:243-9. Available from: https://www.apjtm.org/text.asp?2019/12/6/243/261270
| 1. Introduction|| |
Schistosomiasis caused by Schistosoma species is an important neglected tropical disease that attracts more attention due to its chronic nature, association with water resources, and lack of a protective vaccine. It is dominant in rural poor communities among agriculture and fishing workers, moreover, contact with infected water as in car and clothes washing, as well as recreational activities increases the risk of infections. Out of the Six Schistosoma species affecting humans, Schistosoma(S.) mansoni is responsible for intestinal schistosomiasis in African countries. Nearly, 54 million of infected cases are present in sub-Saharan Africa, while 393 million are at risk. The emergence of schistosomiasis in low endemic or even non-endemic areas can be facilitated by movement of population to urban areas, international tourism, increase in migration, international cooperation programs and environmental changes. Therefore, physicians should consider the likelihood for this parasitic infection in new parts of the globe.
Early diagnosis of schistosomiasis in endemic areas is crucial for patient management, evaluation of treatment efficiency and monitoring of control programs. In non-endemic parts, schistosomiasis diagnosis at the individual level by using more accurate diagnostic test is very essential not only for a curative treatment but also for preventing expansion of Schistosoma in new areas. Additionally, as there is no affordable sensitive and rapid standard test for schistosomiasis, there is an eminent need for a gold standard technique with high sensitivity to which newly developed diagnostic tests can be compared.
Herein, we review the current diagnostic techniques for S. mansoni as it accounts for the majority of intestinal schistosomiasis in Africa with emphasis on recently developed techniques and new diagnostic markers.
| 2. Direct parasitological diagnosis|| |
Examination of stool samples for egg detection is a common utilized method for species identification and recording infection intensity, but it is not suitable for diagnosis of acute disease since egg deposition starts 4-6 weeks post infection(PI). The WHO recommended the Kato-Katz (KK) thick stool smear technique for diagnosis at community level. This technique is highly specific and simple; by microscopic examination of fresh stool sample (41.7 mg) cases with a minimum of 20 eggs/g can be detected. The KK is inexpensive (US$0.1–0.3 for a KK kit) and easily used in field studies to assess the impact of control programs by measuring the changes in the prevalence and infection intensity in post-treatment surveys where mass drug administration using praziquantel is employed. However its poor sensitivity for detecting light intensity infections causes substantial variation in results and in turn alternative techniques are being tested,. The variability in the test results are due to the daily fluctuation in egg excretion, uneven distribution of eggs in the stool sample and the level of experience of technicians. The sensitivity of KK can be improved by using replicate samples on different days, besides, several concentration techniques were developed to improve the microscopic examination of stool such as formol-ether sedimentation, salt flotation and centrifugation, and the interaction of magnetic microspheres with eggs.
FLOTAC is a flotation technique with higher sensitivity than KK but it needs specific equipment, specific flotation solution (Zinc sulphate for S. mansoni eggs) and suitable preservative medium, which can affect the test.
Also, a Mini-FLOTAC (Prof. Giuseppe Cringoli, University of Naples Federico II, Naples, Italy) was developed as a quick and low cost method, which can be used in developing countries. The new Parasep feces centrifuge tube method showed better results than the KK and Mini-FLOTAC due to large stool sample (0.5 g) and using ethyl ether, which removes fat and organic compounds from the sample leading to a clearer field.
Helmintex is another method developed for improving sensitivity of egg detection. This technique promotes the isolation of S. mansoni eggs by using magnetic microspheres which form conjugates between the parasitic eggs and magnetic microspheres since iron is generally present in the eggshell pores but other factors as electrostatic forces between the magnetic particles and the surface ornamentation of the eggs may play a role. Helmintex allows examination of a larger sample (30 g), thus increases the diagnostic sensitivity. Although the recent modification for Helmintex significantly decreased the examination time, and the overall cost, it is still expensive and not suitable for field studies, yet can be used for evaluation of other tests.
The viability of the detected eggs can be assessed by a hatching test. A miracidia hatching apparatus was developed based on the potent positive phototropic behaviour of the miracidia. Although the test is simple, cheap, useful for diagnosis and improving the diagnostic sensitivity, hatching can be affected by temperature and quality of water and is not suitable for routine, large-scale screening or in people with light infections.
| 3. Immunological diagnosis|| |
Immunological methods are relatively simple, more sensitive and essential during early stages of infection, in cases with fibrosis, or decreased infection prevalence and intensity as after praziquantel administration, and for initial screening at point-of-care facilities.
3.1. Antibody detection
Detection of antibodies against different Schistosoma stages in different human samples is important for diagnosis of infection in low endemic areas, in children with initial active infection, and in travellers returning from endemic areas. Antibody detection tests remain positive for years after successful treatment, so combination of serological tests and/or using different antigens enable differentiation between active and chronic disease. Also, antibody detection is not suitable for reporting infection intensity, and usually there is cross-reactivity with other helminths as the antigen used is a crude extract of schistosomes leading to decreased test specificity. Available antibody-based assays include the circumoval precipitin test that depends on the development of precipitate after incubation of the serum of a patient suffering from schistosomiasis with lyophilized Schistosoma eggs. The test is positive if there is more than 9% of precipitation around the mature eggs. Circumoval precipitin test is highly sensitive and specific and has been used with copro-microscopy to increase the diagnostic accuracy, but it is laborious, complex with long reaction time for sero-conversion post-treatment.
Cercarien Hüllen reaction is another antibody detection test, where live cercariae are incubated with the serum of an infected patient, then a precipitate is formed and cercariae become immobilized. Currently, it is not used because of several disadvantages. The test is complex, time consuming and remains positive several years after successful treatment leading to misdiagnosis of cleared infection.
The indirect hemagglutination test is commonly used for routine diagnosis of schistosomiasis. It detects reactivity between antibodies and red blood cells (human O-type) coated with schistosomal antigen. The test is simple, highly sensitive, used in large-scale surveys, and as a monitoring method in schistosomes-endemic areas, but it has the same disadvantages of antibody detection tests.
The indirect immunofluorescence assay detects the reaction between parasite antigens and anti-schistosomal antibodies in patient serum or other body fluids. The test is highly sensitive, especially in low-prevalence areas. Paraffin sections of adult worms can be used to detect antibodies against gut-associated antigens, eggs and cercariae in acute and chronic infections. Immunofluorescence assay can be used with other diagnostic methods to improve its diagnostic value, however, the need for costly reagents, microscopes and technical expertise limits its use in community surveys,.
Enzyme-linked immunosorbent assay (ELISA) is widely used, yet crude antigens used have low sensitivity and may exhibit cross-reactivity, so purified and recombinant antigens are preferred.
Soluble egg antigen (SEA/ELISA) was widely used and anti-SEA IgG4 was used as biomarker for detecting schistosomiasis in endemic areas. The purified cationic egg fraction 6 proved more sensitive and useful in detecting praziquantel efficacy especially in children but with low specificity. When fractionated SEA was used in ELISA (FA-ELISA), it was able to detect current infection with low cross reactivity with other parasites. The soluble cercarial antigen of S. mansoni was detected in serum from early infection using ELISA. Cercarial antigen was also used in rapid card diagnostic tests, which were reported as sensitive as duplicate KK, and can be an alternative for urine circulating cathodic antigen (CCA) in diagnosis of schistosomiasis in endemic areas. When used with ELISA, schistosomula tegument was better in diagnosis of acute infection than adult worm antigen particularly in non-endemic areas. Yet, using S. mansoni microsomal antigen (MAMA) was better. As modification of conventional ELISA, the modified Falcon assay screening test used adult worm antigen gave similar specificity and sensitivity as conventional tests but in short time.
The keyhole limpet hemocyanin (KHL) is a protein extracted from the marine mollusc Megathura crenulata. KHL can be used to differentiate between acute and chronic schistosomiasis using ELISA, as a shared carbohydrate epitope between this protein and tegumental antigens from S. mansoni schistosomula has been reported. Although KHL represents an attractive cheap, stable and commercially available antigen for large-scale screening, yet conflicting results have been reported from field studies.
Lateral flow-based assays and up-converting phosphor reporters is a technique recently introduced for rapid detection of anti-schistosomal antibodies in blood, urine and even saliva. By using a single strip carrying multiple antigens or targets (up to 20), antibodies specific to certain infection can be detected simultaneously in a format suitable for field application.
Three antibody detection tests showed high sensitivity have been developed recently but only suitable for S. japonicum. The dot immunogold filtration assay depends on using a nitrocellulose membrane as a carrier for japonicum egg proteins and gold colloid as a marker for qualitative detection of antibodies, the dipstick dye immuno-assay is composed of colloidal dye-labeled protein from cercaria or egg used as a probe. The assay is suitable for screening large number of people and the Electrochemical immunosensor array test, which uses either SEA or recombinant antigen (SjE16; a calcium-binding protein) from S. japonicum or both (8 parts SjE16: 1 part SEA). Sensitivity when using both antigens was 100% with minimum cross reactivity. This promising test is rapid, sensitive, specific, fairly inexpensive and suitable for epidemiological screen of schistosomiasis on large scale since the equipments used are simple and portable.
3.2. Antigen detection
Circulating anodic antigen (CAA) and CCA originating from the worm gut, are indicators of active infection since they are detected in blood three weeks post-infection, also they are useful for follow up. When used in ELISA, detection of circulating anodic antigen in serum and CCA in urine gives similar sensitivities, and both can be used in low endemic areas. CCA detection in urine was developed as a rapid lateral flow cassette assay to diagnose S. mansoni infection, then the technique was changed to dipstick format, as point-of-care urine CCA assay used in epidemiological surveys. The test is easy and more sensitive than the KK, yet expensive, but detection of CCA in urine is a rapid way for identification of active infection by using a non-invasive technique. A newly tested method utilizes paramagnetic microspheres coated with anti-CCA monoclonal antibody for specific detection of CCA epitopes in low endemic area. This method was effective, but it needs specially equipped laboratories.
| 4. Nucleic acid-based amplification techniques|| |
Nucleic acid detection using several techniques is an accurate method for diagnosis, particularly in field settings where collection and storage conditions are difficult to control.
In the DNA-based diagnosis, extraction of DNA is the key procedure since the yield and quality of DNA directly affects the outcome of the amplification procedure. Traditional extraction method of DNA is based on extraction with phenol-chloroform followed by precipitation using ethanol or isopropanol, but these techniques are time consuming and the exposure to these hazardous chemicals may cause human adverse effects. The appearance of commercial DNA extraction kits reduces time and effort and improves the quality and quantity of DNA.
In conventional polymerase chain reaction (PCR), DNA extracted from blood or stool samples of schistosomiasis patient is the template for amplification using a probe targeting specific fragments of Schistosoma genome. A set of primers used to amplify a highly repeated 121-basepair sequence of S. mansoni were reported by Hamburger et al., and a PCR assay was established to diagnose schistosomiasis using serum and stool samples. The detection limit was 10 times lower than the KK. Also, mitochondrial gene fragment has been tested and identified the Schistosoma species. Other techniques as ELISA and restriction fragment length polymorphism can be used with conventional PCR to improve its sensitivity.
For PCR-ELISA technique, it employs ELISA to quantify a specific amplified DNA sequence from samples as stool using a microplate, so the technique is more sensitive in diagnosing light infection. Copro-PCR-based techniques detect parasite DNA in fecal samples, but polymerase inactivation by inhibitors in stool is a problem. The common method for detection of PCR amplified products is running the product on gel through gel electrophoresis, but the carcinogenic ethidium bromide should be added for the amplified product to be seen under ultra-violet trans-illumination. Oligochromatographic dipstick is a simple and quick alternative method for visualization of the amplified product via its hybridization with a gold-conjugated probe. It allows both identification and differentiation between S. mansoni and S. haematobium by naked eye.
In multiplex PCR, using different sets of primers leads to amplification of multiple nucleic acid fragments in the same reaction, thus saving reagents. A species-specific primer sets targeting coxl, a mitochondrial gene encoding cytochrome C oxidase subunit 1 was used to differentiate between different human Schistosoma species as the resultant amplified products were species-specific.
In quantitative real-time PCR (qRT-PCR), amplification and quantification of the target gene are monitored in real-time by using a fluorescent reporter, and the signal strength is directly proportional to the number of the amplified DNA molecules. The detection method of qRT-PCR uses a sequence-specific probe (TaqMan probe, molecular beacon) or a non-sequence specific DNA-binding dye as SYBR green. The qRT-PCR was tested on fecal and serum samples from S. mansoni-infected hamsters and was found to detect Schistosoma DNA from 14 up to 56 days PI. Serum and stool samples from infected individuals were also used to amplify SM1-7 (GenBank accession number M61098), a 121 bp tandem repeats representing nearly 12% of the genome of S. mansoni male and female.
High-resolution melting analysis is a relatively new post-PCR analysis for characterization of DNA amplicons. By amplifying a conserved region on the coxl gene, it was simple and inexpensive to genotype and rapidly differentiate between S. haematobium and S. mansoni. The high-resolution melting assay can identify and distinguish between Schistosoma species infecting human when targeting a portion of the nuclear 18S rDNA, so it can be used as an accurate, precise alternative tool to other probe-based genotyping assays in the epidemiological surveys and diagnostic laboratories detecting as little as 10-5 ng genomic DNA from Schistosoma species.
Droplet digital PCR (ddPCR) is a technique used for quantification of nucleic acid. It is based on the distribution of the individual molecules into many reactions at limiting dilution to amplify the individual template molecules separately, hence resulting in zero or one molecule in each reaction. After reaction termination, the concentration of template can be determined by Poisson statistical analysis of the number of positive and negative reactions. The ddPCR is sensitive and gives absolute quantification without external references. The reactions can be partitioned into nanoliter-sized, aqueous uniform droplets in oil rather than multi-well plates, leading to analysis of thousands of droplets per sample and makes ddPCR practical for routine use. Recently, ddPCR was used for detection of S. japonicum DNA in human stool, serum, urine, and saliva with high sensitivity compared with the KK.
To address high costs associated with DNA amplification techniques, the loop-mediated isothermal amplification (LAMP) has been developed as a one step amplification method using 6 primers; 2 internal, 2 outer, and 2 loop primers to amplify the target DNA sequence under isothermal condition (60-65 °C) within one hour. LAMP is based on self-recurring strand-displacement synthesis done by reaction primers and assisted by using a special DNA polymerase with strand displacement properties, commonly Bst (Bacillus stearothermophilus) polymerase. Amplification reaction can be inspected because of the turbidity introduced by the presence of magnesium pyrophosphate white precipitate and simultaneous measurement of the turbidity of the samples in real-time by using turbidimetry. Other indicators can be used as SYBR Green I and hydroxy naphthol blue. In experimental S. mansoni infection, a mitochondrial minisatellite DNA region [GenBank accession no: L27240] was selected as LAMP target (SmMIT-LAMP assay). The 620 pb was successfully amplified from mice feces one week PI, whereas the KK technique can detect eggs six weeks PI. LAMP is a simple and fast technique with higher amplification capacity, suitable for low-resource countries, but the amplification mechanism can lead to carryover contamination and false-positive results.
PCR-based techniques can also detect cell-free parasite DNA in patient serum from the first week of infection. The cell-free parasite DNA is originated from tegument shedding of worms, dead schistosomula and inactive eggs. It is uniformly distributed in serum/ plasma and excreted in urine, saliva or other body fluids as CSF. The cell-free parasite DNA is useful in diagnosis of early infection and extra-intestinal disease as neuroschistosomiasis, besides, its amount declines with treatment; so it can be used for monitoring drug efficacy.
The ribosomal DNA (rDNA)-based assay has been developed as a sensitive, species-specific technique, since amplicons from different human Schistosoma species could be amplified. Moreover, DNA isolation and PCR-based identification of S. mansoni were performed by using sediments of urine from infected patients.
| 5. New markers for diagnosis of schistosomiasis|| |
5.1. Extracellular vesicles (EV) protein and micro-RNAs
Parasite EV are membrane-bound vesicles classified based on their sizes, specific proteins and RNA contents into exosomes and microvesicles. Exosomes develop within a cell by inward budding of multi-vesicular endosomes and thus contain components of the parental cell, such as RNAs or proteins. Recently, S. mansoni exosome-like EV from adult and schistosomula have been characterized, and several proteins were tested as vaccine candidates.
MicroRNAs (miRNAs) are short noncoding RNAs that regulate gene expression in eukaryotes, they are present in EV and play a role in host-parasite interplay. Experimentally, elevation of miRNAs sma-miR-277, sma-miR-3479-3p, and bantam were reported in a murine model of schistosomiasis 8 weeks PI. Furthermore, miR-277, miR-3479-3p and bantam were tested in serum from low and high infection sites in Zimbabwe and Uganda and miRNAs were able to detect infected individuals in these areas with high sensitivity and specificity.
A study has detected miRNAs within EV fractions from infected travellers, and highlighted the possibility of using miRNA for evaluating the efficacy of treatment, as miRNA level decreased as early as 11 weeks after treatment. However, tests used for detection of schistosomal miRNA are still expensive and need more validation at the field level.
5.2. Schistosoma tegument proteins
Parasite surface proteins, particularly those expressed in the adult tegument, are considered as valuable vaccine candidates and markers for diagnosis. The identification of certain tegument proteins as potential diagnostic markers can help in improving diagnostic sensitivity of Schistosoma infection when used instead of crude extract from adult. Examples of those proteins are as follows: Aquaporins is an integral membrane protein involved in selective transportation of water and solutes through the plasma membrane of mammals, plants and lower organisms. Aquaporin is the most abundant transmembrane protein in S. mansoni tegument; expressed in all developmental stages especially intravascular stages. It plays a vital role in parasite survival through osmoregulation and nutrient transport.
Dysferlin is a member of the ferlin family involved in plasma membrane repair. In S. japonicum, Dysferlin was reported as a tegumental protein upregulated in adult worms, particularly females and was involved in the repair process in the tegument and muscle.
The rSm200 is recombinant 200-kDa tegumental protein used in ELISA for diagnosis of schistosomiasis. When used in experimental studies, there were significant differences between infected (acute and chronic) and non-infected animals, the test can also differentiate between healthy persons from non-endemic areas and infected patients, but cannot diagnose patients from low endemic areas.
| 6. Conclusion|| |
Despite control programs, schistosomiasis is still a public health problem. Early and accurate diagnosis of schistosomiasis lead to early treatment, cessation of transmission cycle and prevention of chronic complications. Many diagnostic tests for schistosomiasis are available but have unsatisfactory performance. Although the application of molecular techniques to improve diagnostics for Schistosoma infection has resulted in some technical advances, but still with the lack of reliable diagnostic tools, underestimation of disease prevalence will lead to the misuse of protective chemotherapy and ultimately to an increase in costs and efforts. It is important to work on improving the current diagnostic methods for better results, and simultaneously look for new diagnostic markers. Surface proteins such as Aquaporin, Dysferlin and rSm200 are attractive biomarkers, which could be used for development of rapid diagnostic tests and contribute to increase the accuracy of diagnosis.
Conflict of interest statement
We declare that we have no conflict of interest.
We would like to express our sincere gratitude to Prof. Barbara L. Doughty, Texas A & M University, U.S.A., for editing and critically revising the scientific contents of the review.
| References|| |
Marchese V, Beltrame A, Angheben A, Monteiro GB, Giorli G, Perandin F, et al. Schistosomiasis in immigrants, refugees and travellers in an Italian referral centre for tropical diseases. Infect Dis Poverty
(1): 55. doi: 10.1186/s40249-018-0440-5. 2018.
Weerakoon KG, Gobert GN, Cai P, McManus DP. Advances in the diagnosis of human schistosomiasis. Clin Microbiol Rev
(4): 939967 doi: 101128/CMR00137-14 2015.
Turner HC, Bettis AA, Dunn JC, Whitton JM, Hollingsworth D, Fleming FM, et al. Economic considerations for moving beyond the Kato-Katz technique for diagnosing intestinal parasites as we move towards elimination. Trends Parasitol
(6): 435-443. doi: 10.1016/ j.pt.2017.01.007.
De Vlas SJ, Engels D, Rabello AL, Oostburg BF, Van Lieshout L, Polderman AM, et al. Validation of a chart to estimate true Schistosoma mansoni
prevalences from simple egg counts. Parasitology
Pt 2): 113-121.
Secor WE. Early lessons from schistosomiasis mass drug administration programs. F1000Res
F1000 Faculty Rev-1157.
Glinz D, Silué KD, Knopp S, Lohourignon LK, Yao KP, Steinmann P, et al. Comparing diagnostic accuracy of Kato-Katz, Koga Agar plate, ether-concentration, and FLOTAC for Schistosoma mansoni
and soil-transmitted helminths. PLoS Negl Trop Dis
Barda B, Zepherine H, Rinaldi L, Cringoli G, Burioni R, Clementi M, et al. Mini-FLOTAC and Kato-Katz: Helminth eggs watching on the shore of lake Victoria. Parasit Vectors
Cringoli G, Rinaldi L, Maurelli MP, Utzinger J. FLOTAC: New multivalent techniques for qualitative and quantitative copromicroscopic diagnosis of parasites in animals and humans. Nat Protoc
(3): 503515. doi: 101038/nprot2009235.
Ng’etich AI, Rawago FO, Jura WG, Mwinzi PN, Won KY, Odiere MR. A cross-sectional study on schistosomiasis and soil-transmitted helminths in Mbita district, western Kenya using different copromicroscopic techniques. Parasit Vectors
87. doi: 101186/s13071-016-1368-x.
Karl S, Gutiérrez L, Lucyk-Maurer R, Kerr R, Candido RR, Toh SQ, et al. The iron distribution and magnetic properties of schistosome eggshells: Implications for improved diagnostics. PLoS Negl Trop Dis
Favero V, Frasca Candido RR, De Marco Verissimo C, Jones MK, St. Pierre TG, Lindholz CG, et al. Optimization of the Helmintex method for schistosomiasis diagnosis. Exp Parasitol
Oliveira WJ, Magalhäes FdC, Elias AMS, de Castro VN, Favero V, Lindholz CG, et al. Evaluation of diagnostic methods for the detection of intestinal schistosomiasis in endemic areas with low parasite loads: Saline gradient, Helmintex, Kato-Katz and rapid urine test. PLoS Negl Trop Dis
Jurberg AD, Oliveira ÁuAd, Lenzi HL, Coelho PMZ. A new miracidia hatching device for diagnosing schistosomiasis. Mem Inst Oswaldo Cruz
Borges DS, de Souza JS, Romanzini J, Graeff-Teixeira C. Seeding experiments demonstrate poor performance of the hatching test for detecting small numbers of Schistosoma mansoni
eggs in feces. Parasitol Int
Noya BA, Ruiz R, Losada S, Comenares C, Toro J, Cesari IM, et al. Detection of schistosomiasis cases in low-transmission areas based on coprologic and serologic criteria The Venezuelan experience. Acta Trop
(1): 41-49. doi: 10.1016/j.actatropica.2007.04.018.
Doenhoff MJ, Chiodini PL, Hamilton JV. Specific and sensitive diagnosis of schistosome infection: can it be done with antibodies? Trends Parasitol
Rodriguez-Molina R, Gonzalez JO, De Sala AR. The circumoval precipitin test in Schistosoma mansoni
. A study of 300 patients. JAMA
Ahmed MM, Hussein HM, el-Hady HM. Evaluation of cercarien hullen reaction (CHR) as a diagnostic test in chronic schistosomiasis and as a parameter for reinfection in acute cases. J Egypt
Cai YC, Xu JF, Steinmann P, Chen SH, Chu YH, Tian LG, et al. Field comparison of circulating antibody assays versus circulating antigen assays for the detection of schistosomiasis japonica in endemic areas of China. Parasit Vectors
138. doi: 101186/1756-3305-7-138 2014.
de Oliveira EJ, Kanamura HY, Takei K, Hirata RD, Valli LC, Nguyen NY, et al. Synthetic peptides as an antigenic base in an ELISA for laboratory diagnosis of schistosomiasis mansoni. Trans R
Soc Trop Med Hyg
(4): 360-366. doi: 101016/jtrstmh200711008.
Burlandy-Soares LC, de Souza Dias LC, Kanamura HY, de Oliveira EJ, Ciaravolo RM. Schistosomiasis mansoni: Follow-up of control program based on parasitologic and serologic methods in a Brazilian community of low endemicity. Mem Inst Oswaldo Cruz
Doenhoff MJ, Butterworth AE, Hayes RJ, Sturrock RF, Ouma JH, Koech D, et al. Seroepidemiology and serodiagnosis of schistosomiasis in Kenya using crude and purified egg antigens of Schistosoma mansoni
in ELISA. Trans R Soc Trop Med Hyg
Bligh J, Schramm G, Chiodini PL, Doenhoff MJ. Serological analysis of the outcome of treatment of Schistosoma mansoni
infections with praziquantel. Ann Trop Med Parasitol
(6): 511-520. doi: 101179 /136485910X12786389891245.
Zhu Y, Hua W, Xu M, He W, Wang X, Dai Y, et al. A novel immunodiagnostic assay to detect serum antibody response against selected soluble egg antigen fractions from Schistosoma japonicum. PLoS One
(8): e44032. doi: 101371/journalpone0044032.
Smith H, Doenhoff M, Aitken C, Bailey W, Ji M, Dawson E, et al. Comparison of Schistosoma mansoni
soluble cercarial antigens and soluble egg antigens for serodiagnosing schistosome infections. PLoS Negl Trop Dis
(9): e1815. doi: 101371/journalpntd0001815.
Nausch N, Dawson EM, Midzi N, Mduluza T, Mutapi F, Doenhoff MJ. Field evaluation of a new antibody-based diagnostic for Schistosoma haematobium
and S. mansoni
at the point-of-care in northeast Zimbabwe. BMC Infect Dis
Grenfell RF, Martins W, Drummond SC, Antunes CM, Voieta I, Otoni A, et al. Acute schistosomiasis diagnosis: A new tool for the diagnosis of schistosomiasis in a group of travellers recently infected in a new focus of Schistosoma mansoni. Rev Soc Bras Med Trop
Abdel-Fattah M, Al-Sherbiny M, Osman A, Charmy R, Tsang V. Improving the detection limit of quantitative diagnosis of anti-S. haematobium
antibodies using Falcon Assay Screening Test (FAST) ELISA by developing a new standard curve. Parasitol Res
(6):1457-1463. doi: 101007/s00436-010-2198-y.
Mansour MM, Ali PO, Farid Z, Simpson AJG, Woody JW. Serological differentiation of acute and chronic schistosomiasis mansoni by antibody responses to Keyhole Limpet Hemocyanin. Am J Trop Med Hyg
Verweij JJ, Polderman AM, Visser LG, Deelder AM. Measurement of antibody response to keyhole limpet haemocyanin was not adequate for early diagnosis of schistosomiasis in a group of Dutch visitors to Mali. Trans R Soc Trop Med Hyg
Corstjens PL, De Dood CJ, Kornelis D, Fat EM, Wilson RA, Kariuki TM, et al. Tools for diagnosis, monitoring and screening of Schistosoma
infections utilizing lateral-flow based assays and upconverting phosphor labels. Parasitology
(14):1841-1855. doi: 101017/ S0031182014000626.
Wang L, Li Z, Shen J, Liu Z, Liang J, Wu X, Sun X, Wu Z. Exosome-like vesicles derived by Schistosoma japonicum
adult worms mediates M1 type immune-activity of macrophage. Parasitol Res
(5):1865-1873. doi: 101007/s00436-015-4373-7.
Weifeng G, Joseph WM, Zhisheng D, Yumin Z, H W. Advances in diagnosis of schistosomiasis. Microbiol Curr Res
Deng W, Xu B, Hu H, Li J, Hu W, Song S, et al. Diagnosis of schistosomiasis japonica with interfacial co-assembly-based multichannel electrochemical immunosensor arrays. Sci Rep
Grenfell RFQ, Coelho PMZ, Taboada D, de Mattos ACA, Davis R, Harn DA. Newly established monoclonal antibody diagnostic assays for Schistosoma mansoni
direct detection in areas of low endemicity. Plos One
Bergallo M, Costa C, Gribaudo G, Tarallo S, Baro S, Negro Ponzi A, et al. Evaluation of six methods for extraction and purification of viral DNA from urine and serum samples. New Microbiol
Weerakoon KG, Gordon CA, McManus DP. DNA diagnostics for schistosomiasis control. Trop Med Infect Dis
(3) pii: tropicalmed3030081. doi: 10.3390/tropicalmed3030081.
Hamburger J, Turetski T, Kapeller I, Deresiewicz R. Highly repeated short DNA sequences in the genome of Schistosoma mansoni
recognized by a species-specific probe. Mol Biochem Parasitol
Gobert GN, Chai M, Duke M, McManus DP. Copro-PCR based detection of Schistosoma
eggs using mitochondrial DNA markers. Mol Cell Probes
(4): 250-254. doi: 101016/jmcp200501006.
Gomes LI, Dos Santos Marques LH, Enk MJ, de Oliveira MC, Coelho PM, Rabello A. Development and evaluation of a sensitive PCR-ELISA system for detection of Schistosoma
infection in feces. PLoS Negl Trop Dis
(4): e664. doi: 10.1371/journal.pntd.0000664.
Fung MS, Xiao N, Wang S, Carlton EJ. Field evaluation of a PCR Test for Schistosoma japonicum
egg detection in low-prevalence regions of China. Am J Trop Med Hyg
Akinwale OP, Laurent T, Mertens P, Leclipteux T, Rollinson D, Kane R, et al. Detection of schistosomes polymerase chain reaction amplified DNA by oligochromatographic dipstick. Mol Biochem Parasitol
(2): 167-170. doi: 101016/jmolbiopara200804003.
Kato-Hayashi N, Kirinoki M, Iwamura Y, Kanazawa T, Kitikoon V. Identification and differentiation of human schistosomes by polymerase chain reaction. Exp Parasitol
(3): 325-329. doi: 101016/ jexppara200911008.
Espirito-Santo MC, Alvarado-Mora MV, Pinto PL, de Brito T, Botelho-Lima L, Heath AR, et al. Detection of Schistosoma mansoni
infection by TaqMan(R) Real-Time PCR in a hamster model. Exp Parasitol
83-89. doi: 101016/jexppara201405013 .
Sady H, Al-Mekhlafi HM, Ngui R, Atroosh WM, Al-Delaimy AK, Nasr NA, et al. Detection of Schistosoma mansoni
and Schistosoma haematobium
by real-time PCR with high resolution melting analysis. Int J Mol Sci
(7):16085-16103. doi: 103390/ijms160716085 2015.
Pinheiro MC, Carneiro TR, Hanemann AL, Oliveira SM, Bezerra FS. The combination of three faecal parasitological methods to improve the diagnosis of schistosomiasis mansoni in a low endemic setting in the state of Ceara, Brazil. Mem Inst Oswaldo Cruz
Weerakoon KG, Gordon CA, Williams GM, Cai P, Gobert GN, Olveda RM, et al. Droplet digital PCR diagnosis of human schistosomiasis: parasite cell-free DNA detection in diverse clinical samples. J Infect Dis
(12): 1611-1622. doi: 101093/infdis/jix521 2017.
Notomi T, Okayama H, Masubuchi H, Yonekawa T, Watanabe K, Amino N, et al. Loop-mediated isothermal amplification of DNA. Nucleic Acids Res
Goto M, Honda E, Ogura A, Nomoto A, Hanaki K. Colorimetric detection of loop-mediated isothermal amplification reaction by using hydroxy naphthol blue. Biotechniques
2009 ; 46
(3):167-172. doi: 102144/000113072 2009.
Fernandez-Soto P, Gandasegui Arahuetes J, Sanchez Hernandez A, Lopez Aban J, Vicente Santiago B, Muro A. A loop-mediated isothermal amplification (LAMP) assay for early detection of Schistosoma mansoni
in stool samples: A diagnostic approach in a murine model. PLoS Negl Trop Dis
(9): e3126. doi: 101371/journalpntd0003126.
Wichmann D, Panning M, Quack T, Kramme S, Burchard GD, Grevelding C, et al. Diagnosing schistosomiasis by detection of cell-free parasite DNA in human plasma. PLoS Negl Trop Dis
(4): e422. doi: 101371/journalpntd0000422.
Sandoval N, Siles-Lucas M, Perez-Arellano JL, Carranza C, Puente S, et al. A new PCR-based approach for the specific amplification of DNA from different Schistosoma
species applicable to human urine samples. Parasitology
(Pt 5): 581-587. doi: 101017/ S0031182006000898.
Lodh N, Naples JM, Bosompem KM, Quartey J, Shiff CJ. Detection of parasite-specific DNA in urine sediment obtained by filtration differentiates between single and mixed infections of Schistosoma mansoni
and S. haematobium
from endemic areas in Ghana. PLoS One
(3): e91144. doi: 101371/journalpone0091144.
Coakley G, Maizels RM, Buck AH. Exosomes and other extracellular vesicles: The new communicators in parasite infections. Trends Parasitol
2015; 31(10):477-489. doi: 101016/jpt201506009.
Sotillo J, Pearson M, Potriquet J, Becker L, Pickering D, Mulvenna J, et al. Extracellular vesicles secreted by Schistosoma mansoni
contain protein vaccine candidates. Int J Parasitol
(1):1-5. doi: 101016/ jijpara201509002.
Hoy AM, Lundie RJ, Ivens A, Quintana JF, Nausch N, Forster T, et al. Parasite-derived microRNAs in host serum as novel biomarkers of helminth infection. PLoS Negl Trop Dis
Meningher T, Lerman G, Regev-Rudzki N, Gold D, Ben-Dov IZ. Schistosomal microRNAs isolated from extracellular vesicles in sera of infected patients: A new tool for diagnosis and follow-up of human Schistosomiasis. J Infect Dis
(3): 378-386. doi: 101093/infdis/ jiw539 2017.
Figueiredo BC, De Assis NR, De Morais SB, Martins VP, Ricci ND, Bicalho RM, et al. Immunological characterization of a chimeric form of Schistosoma mansoni
aquaporin in the murine model. Parasitology
(10): 1277-1288. doi: 101017/S0031182014000468.
Xiong Y, Ai D, Meng P, Wei M, Hong Y, Zhang M, et al. Cloning, expression, and preliminary characterization of the dysferlin tegument protein in Schistosoma japonicum. Parasitol Int
Carvalho GB, Pacifico LG, Pimenta DL, Siqueira LM, Teixeira-Carvalho A. Evaluation of the use of C-terminal part of the Schistosoma mansoni
200kDa tegumental protein in schistosomiasis diagnosis and vaccine formulation. Exp Parasitol
124-132. doi: 101016/jexppara201402003.
|This article has been cited by|
||Comparison of quantitative polymerase chain reaction, Kato-Katz and circulating cathodic antigen rapid test for the diagnosis of Schistosoma mansoni infection: A cross-sectional study in Kirinyaga County, Kenya
| ||Benard Chieng,Collins Okoyo,Elses Simiyu,Paul Gichuki,Cassian Mwatele,Stella Kepha,Sammy Njenga,David Mburu |
| ||Current Research in Parasitology & Vector-Borne Diseases. 2021; 1: 100029 |
|[Pubmed] | [DOI]|
||Electrochemical biosensors for neglected tropical diseases: A review
| ||Taís Aparecida Reis Cordeiro,Mayra Asevedo Campos de Resende,Simone Cristina dos Santos Moraes,Diego Leoni Franco,Arnaldo César Pereira,Lucas Franco Ferreira |
| ||Talanta. 2021; : 122617 |
|[Pubmed] | [DOI]|
||Mass Spectrometry based Metabolomics for Small Molecule Metabolites Mining and Confirmation as Potential Biomarkers for Schistosomiasis – Case of the Okavango Delta Communities in Botswana
| ||Sedireng M. Ndolo, Matshediso Zachariah, Lebotse Molefi, Nthabiseng Phaladze, Kwenga F. Sichilongo |
| ||Expert Review of Proteomics. 2021; |
|[Pubmed] | [DOI]|
||Anatomical MRI and [18F]FDG PET/CT imaging of Schistosoma mansoni in a NMRI mouse model
| ||Tobias Lindner,Jan Stenzel,Nicole Koslowski,Alexander Hohn,Änne Glass,Sarah M. Schwarzenböck,Bernd J. Krause,Brigitte Vollmar,Emil C. Reisinger,Martina Sombetzki |
| ||Scientific Reports. 2020; 10(1) |
|[Pubmed] | [DOI]|
||Schistosomiasis: from established diagnostic assays to emerging micro/nanotechnology-based rapid field testing for clinical management and epidemiology
| ||Maurice Mutro Nigo,Georgette Salieb-Beugelaar,Manuel Battegay,Peter Odermatt,Patrick Hunziker |
| ||Precision Nanomedicine. 2019; 3(1): 439 |
|[Pubmed] | [DOI]|