1
|
Ndiour CN, Senghor B, Thiam O, Niang S, Wotodjo AN, Faye BT, Ndiaye NA, Sow O, Sylla K, Ndiaye M, Gaye O, Faye B, Sokhna C, Doucouré S, Sow D. Prevalence and associated factors of schistosomiasis among pregnant women in northern Senegal. BMC Infect Dis 2024; 24:682. [PMID: 38982383 PMCID: PMC11232235 DOI: 10.1186/s12879-024-09443-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 05/28/2024] [Indexed: 07/11/2024] Open
Abstract
BACKGROUND Schistosomiasis remains a public health concern worldwide. It is responsible for more than 240 million cases in 78 countries, 40 million of whom are women of childbearing age. In the Senegal River basin, both Schistosoma haematobium and Schistosoma mansoni are very prevalent in school-age children. However, there is a lack of information on the burden of schistosomiasis in pregnant women, which can cause complications in the pregnancy outcome. This study aimed to determine the prevalence and associated factors of schistosomiasis in pregnant women. METHODS We conducted a prospective cross-sectional study of pregnant women attending antenatal clinics at the health center of the Senegalese Sugar Company and at the hospital of Richard Toll between August and December 2021. The urine and stool samples collected were examined using microscopy techniques and quantitative polymerase chain reaction (qPCR) to detect the presence of S. haematobium and S. mansoni. The urines were previously tested using urine reagent strips to detect hematuria and proteinuria. Socio-demographical, clinical, and diagnostically data were recorded by the midwife and the gynaecologist. The data were analyzed using a logistic regression model. RESULTS Among the 298 women examined for the infection by microscopic, 65 (21.81%) were infected with urogenital schistosomiasis, 10 (3.36%) with intestinal schistosomiasis, and 4 (1.34%) were co-infected with both types of schistosomiasis. Out of the 288 samples tested by qPCR, 146 (48.99%) were positive for S. haematobium, 49 (35.51%) for S. mansoni and 22 (15.94%) for both species (co-infection). Pregnant women having microscopic haematuria and proteinuria were significantly more infected (p < 0.05). CONCLUSION This study has revealed a high prevalence of schistosomiasis in pregnant women in Senegal. The qPCR allowed us to detect more cases compared to the microscopy. There is a need to conduct more studies to understand the real burden of the disease and to set up a surveillance system to prevent pregnancy-related complications.
Collapse
Affiliation(s)
- Coumba Nar Ndiour
- Service de Parasitologie-Mycologie, UFR Sciences de la Santé, Université Gaston Berger, de Saint-Louis, Senegal
| | - Bruno Senghor
- EMR MINES: Maladies Infectieuses, Négligées et Émergentes au Sud, Institut de Recherche pour le Développement, Campus International Institut de Recherche pour le Développement-Université-Cheikh Anta Diop of Hann, BP 1386, Dakar, Sénégal
| | - Ousmane Thiam
- Service de Gynécologie-Obstétrique, UFR Sciences de la Santé, Université Gaston Berger, de Saint-Louis, Senegal
| | - Souleymane Niang
- Centre de Santé, Compagnie Sucrière Sénégalaise, Richard Toll, Richard Toll, Senegal
| | - Amélé Nyedzie Wotodjo
- EMR MINES: Maladies Infectieuses, Négligées et Émergentes au Sud, Institut de Recherche pour le Développement, Campus International Institut de Recherche pour le Développement-Université-Cheikh Anta Diop of Hann, BP 1386, Dakar, Sénégal
| | - Babacar Thiendella Faye
- Service de Parasitologie-Mycologie, UFR Sciences de la Santé, Université Gaston Berger, de Saint-Louis, Senegal
| | - Ndeye Amy Ndiaye
- Direction de la Santé de la Mère et de l'Enfant, Ministère de la Santé et de l'Action Sociale, Dakar, Senegal
| | - Omar Sow
- Service de Parasitologie-Mycologie, UFR Sciences de la Santé, Université Gaston Berger, de Saint-Louis, Senegal
| | - Khadime Sylla
- Service de Parasitologie-Mycologie, FMPO, Université Cheikh Anta Diop, de Dakar, Senegal
| | - Magatte Ndiaye
- Service de Parasitologie-Mycologie, FMPO, Université Cheikh Anta Diop, de Dakar, Senegal
| | - Oumar Gaye
- Service de Parasitologie-Mycologie, FMPO, Université Cheikh Anta Diop, de Dakar, Senegal
| | - Babacar Faye
- Service de Parasitologie-Mycologie, FMPO, Université Cheikh Anta Diop, de Dakar, Senegal
| | - Cheikh Sokhna
- EMR MINES: Maladies Infectieuses, Négligées et Émergentes au Sud, Institut de Recherche pour le Développement, Campus International Institut de Recherche pour le Développement-Université-Cheikh Anta Diop of Hann, BP 1386, Dakar, Sénégal
| | - Souleymane Doucouré
- EMR MINES: Maladies Infectieuses, Négligées et Émergentes au Sud, Institut de Recherche pour le Développement, Campus International Institut de Recherche pour le Développement-Université-Cheikh Anta Diop of Hann, BP 1386, Dakar, Sénégal
| | - Doudou Sow
- Service de Parasitologie-Mycologie, UFR Sciences de la Santé, Université Gaston Berger, de Saint-Louis, Senegal.
- EMR MINES: Maladies Infectieuses, Négligées et Émergentes au Sud, Institut de Recherche pour le Développement, Campus International Institut de Recherche pour le Développement-Université-Cheikh Anta Diop of Hann, BP 1386, Dakar, Sénégal.
| |
Collapse
|
2
|
Cando LFT, Perias GAS, Tantengco OAG, Dispo MD, Ceriales JA, Girasol MJG, Leonardo LR, Tabios IKB. The Global Prevalence of Schistosoma mansoni, S. japonicum, and S. haematobium in Pregnant Women: A Systematic Review and Meta-Analysis. Trop Med Infect Dis 2022; 7:354. [PMID: 36355896 PMCID: PMC9693339 DOI: 10.3390/tropicalmed7110354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/01/2022] [Accepted: 11/01/2022] [Indexed: 10/10/2023] Open
Abstract
Schistosomiasis is a neglected tropical disease affecting 40 million women of childbearing age worldwide. Its global disease prevalence among pregnant women is still unknown. This meta-analysis determined the pooled prevalence of schistosomiasis among pregnant women globally. Additionally, this study also determined the pooled prevalence based on infection intensity based on eggs per gram. Observational studies on the prevalence of schistosomiasis among pregnant patients were obtained from Medline, Scopus, and CINAHL from January 2001 until August 2020. A review of titles and abstracts was done independently by six reviewers. The quality of the included studies was assessed using the Newcastle-Ottawa Scale for case-control, cohort, and cross-sectional studies. A total of 27 studies were included in the meta-analysis and meta-regression. The pooled prevalence of S. haematobium was 13.44 (CI: 8.90-19.80) per 100 observations, while the pooled prevalence of S. mansoni was 12.18 (CI: 4.47-29.12) per 100 observations. The prevalence of S. japonicum infection in one study was 53.54 (CI: 43.23-63.62) per 100 observations. Our results showed a prevailing health problem of schistosomiasis during pregnancy in various countries worldwide. This strengthens the need to conduct more schistosomiasis research, prevention, and control programs in pregnant women.
Collapse
Affiliation(s)
- Leslie Faye T. Cando
- College of Medicine, University of the Philippines Manila, Manila 1000, Philippines
| | | | | | - Micah D. Dispo
- Department of Epidemiology and Biostatistics, College of Public Health, University of the Philippines Manila, Manila 1000, Philippines
| | - Jeremy A. Ceriales
- College of Medicine, University of the Philippines Manila, Manila 1000, Philippines
| | - Mark John G. Girasol
- College of Medicine, University of the Philippines Manila, Manila 1000, Philippines
| | - Lydia R. Leonardo
- Office of Research Coordination, University of the East, Manila 1008, Philippines
- Institute of Biology, College of Science, University of the Philippines Diliman, Manila 1101, Philippines
| | - Ian Kim B. Tabios
- Institute of Biology, College of Science, University of the Philippines Diliman, Manila 1101, Philippines
- Institute of Human Genetics, National Institutes of Health, University of the Philippines Manila, Manila 1000, Philippines
| |
Collapse
|
3
|
Animaw Z, Melese A, Demelash H, Seyoum G, Abebe A. Intestinal parasitic infections and associated factors among pregnant women in Ethiopia: a systematic review and meta-analysis. BMC Pregnancy Childbirth 2021; 21:474. [PMID: 34210260 PMCID: PMC8252203 DOI: 10.1186/s12884-021-03908-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 05/28/2021] [Indexed: 11/24/2022] Open
Abstract
Background Intestinal parasitic infections (IPIs) are public health problems widely distributed in the world and cause significant morbidity and mortality; many of which occur among women of reproductive age. IPIs caused by helminthes and protozoan parasites are common among pregnant women. Data on the national pooled prevalence of intestinal parasites and associated factors during pregnancy is not documented well in Ethiopia. This review aims at summarizing evidences on the burden of IPIs and associated factors among pregnant women in Ethiopia. Methods Published and unpublished studies were thoroughly searched at MEDLINE/PubMed, EMBASE, Google Scholar, CINAHL, Cochrane library and Science Direct. In addition, repositories of Addis Ababa, Gondar and Jimma Universities were searched. Eligible studies were selected following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guideline. The pooled prevalence of intestinal parasites and summary odds ratios (ORs) were determined with 95 % confidence intervals (CI). Sub-groups analyses were done based on study region, types of parasites, methods of stool examination and study setting. The statistical analyses were performed using STATA version 14.0 software. Results Among 168 retrieved studies, 31 studies with a total population of 12,118 pregnant women were included. The estimated pooled prevalence of IPIs among pregnant women in Ethiopia was 27.32 % (95 % CI: 20.61, 33.87 %). In the subgroup analysis, Oromia and Amhara regions had the highest prevalence with a 29.78 % (95 % CI: 15.97, 43.60) and 29.63 % (95 % CI: 15.37, 43.89); respectively. In addition, studies conducted in the community showed higher prevalence than institution based studies (49.93 % Vs 24.84 %; respectively). The most prevalent type of intestinal parasite identified were Hookworm followed by Ascaris lumbricoides with a pooled prevalence of 11.2 and 10.34 %, respectively. In our analysis; residence, being bare footed, lack of hand washing habit and eating uncooked/raw vegetables were significantly associated with IPIs among pregnant women in Ethiopia. Conclusions Prevalence of IPIs during pregnancy is relatively high in Ethiopia. Poor hygienic practices were identified as risk factors. Based on our finding, targeted preventive measures shall be considered so as to prevent morbidity and mortality due to IPIs.
Collapse
Affiliation(s)
- Zelalem Animaw
- Department of Biomedical Sciences, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia.
| | - Addisu Melese
- Department of Medical Microbiology, College of Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| | - Habtamu Demelash
- Department of Public Health, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Girma Seyoum
- Department of Anatomy, School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Abiy Abebe
- Traditional and Modern Medicine Research Directorate, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| |
Collapse
|
4
|
Adam I, ALhabardi NA, Al-Wutayd O, Khamis AH. Prevalence of schistosomiasis and its association with anemia among pregnant women: a systematic review and meta-analysis. Parasit Vectors 2021; 14:133. [PMID: 33653391 PMCID: PMC7923606 DOI: 10.1186/s13071-021-04642-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 02/16/2021] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Schistosomiasis is a highly prevalent parasitic disease that can lead to adverse maternal and perinatal outcomes. To our knowledge, there has been no systematic review and meta-analysis of schistosomiasis during pregnancy. METHODS We followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Relevant published studies were searched in international databases (PubMed, Science Direct, Scopus, Web of Science, and Google Scholar), from their inception until May 31, 2020. The retrieved studies were assessed for quality using the Modified Newcastle-Ottawa Scale. OpenMeta Analyst software was used for the statistical analysis. RESULTS Thirty-two studies enrolling 21024 pregnant women were included in this meta-analysis. All 32 of these studies were conducted in Africa. Of these studies, 19, 11, and 2 investigated S. mansoni, S. haematobium, and combined S. mansoni and S. haematobium infections, respectively. The pooled prevalence estimate of schistosomiasis during pregnancy was 13.2% (95 CI 11.0-15.4). A random model was used because of high heterogeneity (Q = 99.14; P < 0.001). In subgroup analyses, the pooled prevalence estimate of S. haematobium was significantly higher than the pooled prevalence estimates of S. mansoni [22.5% (95% CI 1.6-43.5) vs 8.7% (95% CI 6.0-11.3, P = 0.016), respectively]. The results of meta-regression analyses showed a non-significant difference in the prevalence of schistosomiasis during pregnancy according to the study sample sizes and year of publication. Only six studies evaluated the association between schistosomiasis during pregnancy and anemia. Schistosomiasis was associated with anemia in these six studies (OR = 3.02, 95% = 1.25‒7.28, P = 0.014). CONCLUSION The present meta-analysis suggests that schistosomiasis during pregnancy is an existing health problem. This meta-analysis also highlights the lack of data on the determinants and outcomes of schistosomiasis during pregnancy. Preventive measures are needed and could be part of antenatal care in areas endemic with schistosomiasis.
Collapse
Affiliation(s)
- Ishag Adam
- Department of Obstetrics and Gynecology, Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Kingdom of Saudi Arabia
| | - Nadiah A. ALhabardi
- Department of Obstetrics and Gynecology, Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Kingdom of Saudi Arabia
| | - Osama Al-Wutayd
- Department of Family and Community Medicine, Unaizah College of Medicine and Medical Sciences, Qassim University, Unaizah, Kingdom of Saudi Arabia
| | - Ammar H. Khamis
- Hamdan Bin Mohammed College of Dental Medicine, Mohammed Bin Rashid University of Medicine and Health Sciences, Dubai, United Arab Emirates
| |
Collapse
|
5
|
Wepnje GB, Anchang-Kimbi JK, Ndassi VD, Lehman LG, Kimbi HK. Schistosoma haematobium infection status and its associated risk factors among pregnant women in Munyenge, South West Region, Cameroon following scale-up of communal piped water sources from 2014 to 2017: a cross-sectional study. BMC Public Health 2019; 19:392. [PMID: 30971223 PMCID: PMC6458650 DOI: 10.1186/s12889-019-6659-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 03/14/2019] [Indexed: 11/24/2022] Open
Abstract
Background In 2014, a study in Munyenge revealed a high prevalence of urogenital schistosomiasis (UGS) among pregnant women. This study investigated he prevalence and risk factors of UGS in pregnancy following scale-up of piped water sources from 2014 to 2017. Secondly, we compared stream usage, stream contact behaviour, infection rate and intensity with the findings of 2014. Methods Consenting pregnant women reporting for antenatal care (ANC) in the different health facilities were enrolled consecutively between November 2016 and January 2018. Information on age, gravidity status, residence, marital status, educational level, occupation, household water source, frequency of contact with water and stream activities were obtained using a semi-structured questionnaire. Urine samples were examined for the presence of microhaematuria and S. haematobium ova using test strip and filtration/microscopy methods respectively. Data were analysed using univariate and multivariate regression analyses and relative risk reductions calculated. Results Of the 368 women enrolled, 22.3% (82) were diagnosed with UGS. Marital status (single) (aOR = 2.24, 95% CI: 1.04–4.79), primary - level of education (aOR = 2.0; 95% CI: 1.04–3.85) and domestic activity and bathing in the stream (aOR = 3.3; 95% CI: 1.83–6.01) increased risk of S. haematobium infection. Meanwhile, fewer visits (< 3 visits/week) to stream (aOR = 0.35, 95% CI = 0.17–0.74) reduced exposure to infection. Piped water usage was associated with reduced stream usage and eliminated the risk of infection among women who used safe water only. Compared with the findings of 2014, stream usage (RRR = 23 95% CI: 19–28), frequency (≥ 3 visits) (RRR = 69 95% CI: 59–77) and intensity of contact with water (RRR = 37 95% CI = 22–49) has reduced. Similarly, we observed a decrease in infection rate (RRR = 52, 95% CI = 40–62) and prevalence of heavy egg intensity (RRR = 71, 95% CI = 53–81). Conclusion Following increased piped water sources in Munyenge, S. haematobium infection has declined due to reduced stream contact. This has important implication in the control of UGS in pregnancy. Electronic supplementary material The online version of this article (10.1186/s12889-019-6659-7) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Godlove Bunda Wepnje
- Department of Zoology and Animal Physiology, Faculty of Science, University of Buea, P.O. Box 63, Buea, Cameroon
| | - Judith Kuoh Anchang-Kimbi
- Department of Zoology and Animal Physiology, Faculty of Science, University of Buea, P.O. Box 63, Buea, Cameroon.
| | - Vicky Daonyle Ndassi
- Department of Zoology and Animal Physiology, Faculty of Science, University of Buea, P.O. Box 63, Buea, Cameroon
| | - Leopold Gustave Lehman
- Department of Animal Biology, Faculty of Science, University of Douala, P.O. Box 24157, Douala, Cameroon
| | - Helen Kuokuo Kimbi
- Department of Medical Laboratory Science, Faculty of Health Sciences, University of Bamenda, P.O. Box 39, Bambili, Cameroon
| |
Collapse
|
6
|
Oyeyemi OT, Odaibo AB. Maternal urogenital schistosomiasis; monitoring disease morbidity by simple reagent strips. PLoS One 2017; 12:e0187433. [PMID: 29091946 PMCID: PMC5665599 DOI: 10.1371/journal.pone.0187433] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 10/19/2017] [Indexed: 11/18/2022] Open
Abstract
Background Urine analysis is one of the recommended antenatal guidelines for early diagnosis of pregnancy-associated complications. While in practice, urine analysis by dipstick had been used to provide useful information on other urinary tract infections, its applications for early detection of urogenital schistosomiasis in pregnant women is often times not given due attention in most endemic areas. Our study therefore assessed the performance of some common urinalysis parameters in the diagnosis of maternal urogenital schistosomiasis in endemic rural communities of Nigeria. Methodology/Principal findings The cross-sectional epidemiologic survey of urogenital schistosomiasis was conducted among pregnant women in Yewa North Local Government, Ogun State, Nigeria. The women were microscopically examined for infection with Schistosoma haematobium, visually observed for macrohematuria, and screened for microhematuria and proteinuria using standard urine chemical reagent strips. Of 261 volunteered participants, 19.9% tested positive for S. haematobium infection. The proportion of microhematuria (23.8%) was significantly higher than that of macrohematuria (3.8%) and proteinuria (16.8%) (P<0.05). Microhematuria with sensitivity (82.7%) and specificity (89.0%) was the best diagnostic indicator of urogenital schistosomiasis. Macrohematuria with the least sensitivity (11.8%) was however the most specific (98.1%) for diagnosing urogenital schistosomiasis in pregnant women. Maximum microhematuria sensitivity (100.0%) was observed in women between 15–19 years but sensitivity was consistently low in older age groups. Maximum sensitivity, specificity and predictive values (100.0%) were recorded for microhematuria in first trimester women. Diagnostic efficiency of proteinuria and macrohematuria was also better in the first trimester women except the 25.0% specificity recorded for proteinuria. The overall diagnostic performance of microhematuria and proteinuria was better in secundigravidae. Conclusions/Significance Microhematuria can be used for early detection of urogenital schistosomiasis in endemic areas especially in younger women. However because microhematuria is a condition that occurs during pregnancy and in several other diseases, it is necessary to compliment the diagnosis with other diagnostic tools such as microscopy and serology. Treatment with praziquantel is recommended for the women in their late trimesters after follow up test in order to avert associated adverse pregnancy outcomes.
Collapse
Affiliation(s)
- Oyetunde T. Oyeyemi
- Department of Biological Sciences, University of Medical Sciences, Ondo, Ondo State, Nigeria
- * E-mail: ,
| | | |
Collapse
|
7
|
Abstract
BACKGROUND Neglected tropical diseases (NTDs) are generally assumed to be concentrated in poor populations, but evidence on this remains scattered. We describe within-country socioeconomic inequalities in nine NTDs listed in the London Declaration for intensified control and/or elimination: lymphatic filariasis (LF), onchocerciasis, schistosomiasis, soil-transmitted helminthiasis (STH), trachoma, Chagas' disease, human African trypanosomiasis (HAT), leprosy, and visceral leishmaniasis (VL). METHODOLOGY We conducted a systematic literature review, including publications between 2004-2013 found in Embase, Medline (OvidSP), Cochrane Central, Web of Science, Popline, Lilacs, and Scielo. We included publications in international peer-reviewed journals on studies concerning the top 20 countries in terms of the burden of the NTD under study. PRINCIPAL FINDINGS We identified 5,516 publications, of which 93 met the inclusion criteria. Of these, 59 papers reported substantial and statistically significant socioeconomic inequalities in NTD distribution, with higher odds of infection or disease among poor and less-educated people compared with better-off groups. The findings were mixed in 23 studies, and 11 studies showed no substantial or statistically significant inequality. Most information was available for STH, VL, schistosomiasis, and, to a lesser extent, for trachoma. For the other NTDs, evidence on their socioeconomic distribution was scarce. The magnitude of inequality varied, but often, the odds of infection or disease were twice as high among socioeconomically disadvantaged groups compared with better-off strata. Inequalities often took the form of a gradient, with higher odds of infection or disease each step down the socioeconomic hierarchy. Notwithstanding these inequalities, the prevalence of some NTDs was sometimes also high among better-off groups in some highly endemic areas. CONCLUSIONS While recent evidence on socioeconomic inequalities is scarce for most individual NTDs, for some, there is considerable evidence of substantially higher odds of infection or disease among socioeconomically disadvantaged groups. NTD control activities as proposed in the London Declaration, when set up in a way that they reach the most in need, will benefit the poorest populations in poor countries.
Collapse
|
8
|
Abstract
Schistosomiasis remains one of the most important tropical parasitic infections threatening millions of lives in endemic areas. Cases of infections due to Schistosoma spp, the diecious digenetic trematodes have been on the increase over the last decades. While considerable efforts have been made to reduce infections and morbidities in most endemic areas, these efforts seem to be tailored only towards a specific group (school-based resources). This bias towards school children in epidemiological studies has also been observed in various research efforts in sub-Saharan Africa, thus making it difficult to produce a reliable estimate of the extent of infection in other strata of the population at risk. In recent times, attention has been drawn to Schistosoma spp infections in infants and preschool children, while studies on epidemiology of maternal schistosomiasis still suffer neglect. Considering the potential morbidity of Schistosoma infections on the mothers, fetuses, and neonates, as evidenced in some animal models and human case studies, more attention is solicited in all areas of observational studies and clinical trials, for maternal schistosomiasis with the aim of providing relevant data and information for effective management of the disease during pregnancy.
Collapse
|
9
|
Salawu OT, Odaibo AB. Schistosomiasis transmission; socio-demographic, knowledge and practices as transmission risk factors in pregnant women. J Parasit Dis 2014; 40:93-9. [PMID: 27065605 DOI: 10.1007/s12639-014-0454-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Accepted: 03/20/2014] [Indexed: 11/27/2022] Open
Abstract
Schistosoma transmission is influenced by the interplay between various factors ranging from parasite to host associated factors. While many studies have focused on mass chemotherapy to reduce transmission in other populations, no study has examined the impact of social factors that favour transmission in pregnant women in Nigeria. The study was conducted to assess the impact of knowledge, attitudes and sociodemographic factors on schistosomiasis burden in pregnant women of rural communities of Nigeria. A cross sectional community-based field study was conducted to assess the association between Schistosoma haematobium burden and the associated risk factors among pregnant women in rural endemic communities of Nigeria. Structured questionnaire was used to gather information on participants' socio-demographic data, knowledge on schistosomiasis and water contact activities. Of the 237 respondents examined microscopically for infection, 50 (21.1 %) were infected with overall mean infection intensity of 69.6 ± 165.2 eggs/10 mL urine. Multivariate logistic analysis showed occupation of the women to be associated with infection with the artisans having the highest risk (OR 3.34, CI 1.67-6.69, P = 0.022). Contact with water and water usage patterns are also associated with prevalence of disease with fetching (OR 2.04, CI 0.19-3.51, P = 0.003) and multipurpose water usage (OR 4.31, CI 2.17-8.57, P = 0.0002) being the most predisposing variables respectively. Awareness about water borne diseases showed no association with infection (P = 0.382) with typhoid (23.7 %) and fever (2.6 %) constituting the most and least common water borne diseases mentioned by the women. Health education and provision of good water supply should be integrated into the control strategies in order reduce transmission in endemic areas.
Collapse
Affiliation(s)
- Oyetunde T Salawu
- Parasitology Research Unit, Department of Zoology, University of Ibadan, Ibadan, Nigeria ; Department of Biosciences and Biotechnology, Babcock University, Ilishan-Remo, Ogun State Nigeria
| | - Alexander B Odaibo
- Parasitology Research Unit, Department of Zoology, University of Ibadan, Ibadan, Nigeria
| |
Collapse
|
10
|
Ibrahim AM, Ibrahim ME. Evaluation of microscopical and serological techniques in the diagnosis of Schistosoma mansoni infection at Sennar State, Central Sudan. ASIAN PACIFIC JOURNAL OF TROPICAL DISEASE 2014. [DOI: 10.1016/s2222-1808(14)60305-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
11
|
Arndt MB, John-Stewart G, Richardson BA, Singa B, van Lieshout L, Verweij JJ, Sangaré LR, Mbogo LW, Naulikha JM, Walson JL. Impact of helminth diagnostic test performance on estimation of risk factors and outcomes in HIV-positive adults. PLoS One 2013; 8:e81915. [PMID: 24324729 PMCID: PMC3852669 DOI: 10.1371/journal.pone.0081915] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2013] [Accepted: 10/18/2013] [Indexed: 11/18/2022] Open
Abstract
Background Traditional methods using microscopy for the detection of helminth infections have limited sensitivity. Polymerase chain reaction (PCR) assays enhance detection of helminths, particularly low burden infections. However, differences in test performance may modify the ability to detect associations between helminth infection, risk factors, and sequelae. We compared these associations using microscopy and PCR. Methods This cross-sectional study was nested within a randomized clinical trial conducted at 3 sites in Kenya. We performed microscopy and real-time multiplex PCR for the stool detection and quantification of Ascaris lumbricoides, Necator americanus, Ancylostoma duodenale, Strongyloides stercoralis, and Schistosoma species. We utilized regression to evaluate associations between potential risk factors or outcomes and infection as detected by either method. Results Of 153 HIV-positive adults surveyed, 55(36.0%) and 20(13.1%) were positive for one or more helminth species by PCR and microscopy, respectively (p<0.001). PCR-detected infections were associated with farming (Prevalence Ratio 1.57, 95% CI: 1.02, 2.40), communal water source (PR 3.80, 95% CI: 1.01, 14.27), and no primary education (PR 1.54, 95% CI: 1.14, 2.33), whereas microscopy-detected infections were not associated with any risk factors under investigation. Microscopy-detected infections were associated with significantly lower hematocrit and hemoglobin (means of -3.56% and -0.77 g/dl) and a 48% higher risk of anemia (PR 1.48, 95% CI: 1.17, 1.88) compared to uninfected. Such associations were absent for PCR-detected infections unless infection intensity was considered, Infections diagnosed with either method were associated with increased risk of eosinophilia (PCR PR 2.42, 95% CI: 1.02, 5.76; microscopy PR 2.92, 95% CI: 1.29, 6.60). Conclusion Newer diagnostic methods, including PCR, improve the detection of helminth infections. This heightened sensitivity may improve the identification of risk factors for infection while reducing ability to discriminate infections associated with adverse clinical outcomes. Quantitative assays can be used to differentiate infection loads and discriminate infections associated with sequelae.
Collapse
Affiliation(s)
- Michael B. Arndt
- Department of Epidemiology, University of Washington, Seattle, Washington, United States of America
- * E-mail:
| | - Grace John-Stewart
- Department of Epidemiology, University of Washington, Seattle, Washington, United States of America
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Department of Pediatrics, University of Washington, Seattle, Washington, United States of America
- Department of Allergy and Infectious Disease, University of Washington, Seattle, Washington, United States of America
| | - Barbra A. Richardson
- Department of Biostatistics, University of Washington, Seattle, Washington, United States of America
| | - Benson Singa
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
- Centre for Reproductive Health, Kenya Medical Research Institute, Nairobi, Kenya
| | - Lisette van Lieshout
- Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Jaco J. Verweij
- Department of Parasitology, Leiden University Medical Centre, Leiden, The Netherlands
| | - Laura R. Sangaré
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - Loice W. Mbogo
- Centre for Clinical Research, Kenya Medical Research Institute, Nairobi, Kenya
| | | | - Judd L. Walson
- Department of Epidemiology, University of Washington, Seattle, Washington, United States of America
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Department of Pediatrics, University of Washington, Seattle, Washington, United States of America
| |
Collapse
|
12
|
Salawu OT, Odaibo AB. Schistosomiasis among pregnant women in rural communities in Nigeria. Int J Gynaecol Obstet 2013; 122:1-4. [PMID: 23557896 DOI: 10.1016/j.ijgo.2013.01.024] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 01/24/2013] [Accepted: 03/08/2013] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To assess the epidemiology of urogenital schistosomiasis among pregnant women in rural communities of southwestern Nigeria. METHODS The present cross-sectional epidemiologic survey of urogenital schistosomiasis was conducted during 2010-2011 among pregnant women in Yewa North Local Government, Ogun State, Nigeria. The women were microscopically screened for infection with Schistosoma haematobium. RESULTS Of 313 volunteer participants, 20.8% tested positive for S. haematobium infection. The prevalence of infection was highest (31.5%) among women aged 20-24years. The infection intensity did not differ significantly between age groups (t=1.848, P=0.71). Primigravidae and women in the first trimester of pregnancy had the highest intensity of infection with 33.1 and 27.7 eggs/10mL of urine, respectively. There was an association between disease prevalence and parasite intensity across the age groups (χ(2)=68.82, P=0.02). The prevalence of S. haematobium was not associated with age or pregnancy trimester (P=0.06), but associations existed between intensity of infection and gravidity (P=0.001). CONCLUSION The prevalence of urogenital schistosomiasis among pregnant women in Nigeria was high, with younger women and primigravidae at the greatest risk. These data can be used to develop a schistosomiasis control program among pregnant women in the study area.
Collapse
Affiliation(s)
- Oyetunde T Salawu
- Parasitology Research Unit, Department of Zoology, University of Ibadan, Ibadan, Nigeria.
| | | |
Collapse
|