Seasonal variability of intestinal helminths and Schistosoma haematobium in a rural area of the Sahel in Mali

Niangaly, Hamidou; Djimdé, Abdoulaye; Traoré, Boubacar; Sangare, C.P.O.; Guindo, D.; Konaté, Djeneba; Diakité, M L; Diallo, Nouhoun; Maïga-Ascofaré, Oumou; Sogoba, Nafomon; Dabo, Abdoulaye; Doumbo, Ogobara K.

doi:10.1684/mst.2012.0123

Cited by 6 publications

(6 citation statements)

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“…This observed prevalence is low compared to previous studies with most studies conducted in different parts of southern Mauritania, known to be the main endemic area for schistosomiasis [16, 17, 30]. Our observed prevalence is considerably lower than that reported from other studies conducted in different parts of the Sahel, such as Burkina Faso (8.8%) [31], Mali (7.6%) [32] and Sudan (8.6%) [33]. Various ecological features might explain these differences, as they influence the transmission of schistosomiasis [34].…”

Section: Discussioncontrasting

confidence: 80%

Prevalence and seasonal transmission of Schistosoma haematobium infection among school-aged children in Kaedi town, southern Mauritania

Gbalégba

Silué

et al. 2017

Parasites Vectors

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BackgroundMauritania is at the fringe of transmission of human schistosomiasis, which mainly occurs in the southern and southeastern parts of the country. This study aimed to assess the influence of rainfall seasonality on the prevalence of Schistosoma haematobium infection among school-aged children in Kaedi, southern Mauritania.MethodsCross-sectional surveys (i.e. parasitological, malacological and observations on water-related human activities) were carried out in Kaedi between September 2014 and May 2015, during both the wet and dry seasons. A total of 2162 children aged 5–15 years provided a single urine sample that was subjected to S. haematobium diagnosis. Snails were sampled and checked for cercarial shedding. Water contact patterns of the local population were recorded by direct observation.ResultsThe prevalence of S. haematobium was 4.0% (86/2162, 95% confidence interval (CI): 3.2–4.9%) with a geometric mean egg count per 10 ml of urine of 3.7 (95% CI: 2.8–4.3). Being male (adjusted odds ratio (aOR) 1.78, 95% CI: 1.13–2.80), being at primary school (aOR 1.73, 95% CI: 1.04–2.87) and dry season (aOR 0.56, 95% CI: 0.35–0.89) were significantly associated with S. haematobium. Among 284 potential intermediate host snail specimens collected over the rainy and dry seasons, three species were identified: Bulinus senegalensis (n = 13) and B. forskalii (n = 161) in the rainy season, and B. truncatus (n = 157) in the wet season. No snail was shedding cercariae. On average, seven human water contacts were recorded per hour per observer over a 28-day observation period. Twelve types of water contact activities were identified among which, swimming/bathing was predominant (n = 3788, 36.9%), followed by washing clothes (n = 2016, 19.7%) and washing dishes (n = 1322, 12.9%). Females (n = 5270, 51.4%) were slightly more in contact with water than males (n = 4983, 48.6%). The average time spent in the water per person per day was 14.2 min (95% CI: 13.8–14.6 min). The frequency and duration of water contact followed a seasonal pattern.ConclusionOur findings demonstrate a low prevalence and intensity of S. haematobium among school-aged children in Kaedi. Appropriate integrated control measures, including health education among at-risk communities and snail control may help to interrupt transmission of S. haematobium in Kaedi.

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Section: Discussioncontrasting

confidence: 80%

Prevalence and seasonal transmission of Schistosoma haematobium infection among school-aged children in Kaedi town, southern Mauritania

Gbalégba

Silué

et al. 2017

Parasites Vectors

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“…Similarly, the prevalence of STHs was similar during rainy and non‐rainy seasons. A higher prevalence of intestinal helminths during and towards the end of the monsoon was reported in some studies .…”

Section: Discussionmentioning

confidence: 78%

Trends in prevalence of soil‐transmitted helminth and major intestinal protozoan infections among school‐aged children in Nepal

Kunwar

Acharya

Karki

2016

Tropical Med Int Health

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Abstractobjectives To assess the trends in prevalence of soil-transmitted helminths (STHs), Entamoeba histolytica and Giardia lamblia among school-aged children in Nepal between 1990 and 2015.methods Systematic literature search in PubMed, MEDLINE, EMBASE, Google Scholar and local peer-reviewed journals for papers published between 1990 and December 2015. We conducted metaregression and meta-analyses to pool studies where applicable.results Thirty-nine studies that examined a total of 14 729 stool specimens were included in the meta-analyses. The metaregression of prevalence of hookworms, roundworm, and whipworm showed a significantly decreasing trend over time. conclusions We observed a sharp decrease in prevalence of STHs among school-aged children in Nepal in the past decade with prevalences dropping below 5% for STHs with no variation in prevalence in rural and urban areas. However, the prevalence of E. histolytica and G. lamblia remained stable over time. These results suggest that school-based deworming programmes rolled out during the study period had an observable impact on prevalence of STHs.

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“…However, other studies conducted in other parts of Nigeria, such as Maiduguri (northeastern), Anambra (southeastern), Dutsen-Ma (northwestern), and Kano (northwestern), have observed a lower prevalence of 14.5%, 15.7%, 17.3%, and 17.8%, respectively [6,[25][26][27]. A lower prevalence of urinary schistosomiasis has also been reported by other authors from different parts of the world, such as Gbalégba [3] in Mauritania, Ouedraogo [28] in Burkina Faso, Niangaly [29] in Mali, Kapito-Tembo [7] in Malawi, and Sudan [30], at 4.0%, 7.6%, 8.8%, 10.4%, and 13.8%, respectively. The difference in urinary schistosomiasis infection between the present and previous studies might be attributable to variations in geographical location and environmental factors across the countries [1].…”

Section: Discussionmentioning

confidence: 62%

Urinary Schistosomiasis and Associated Risk Factors Among Primary School Students in the Zaki Local Government Area, Bauchi State, Nigeria

Abubakar

ABUBAKAR

Moi

et al. 2022

Dr. Sulaiman Al Habib Med J

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Urinary schistosomiasis, a water-based disease, is endemic to Nigeria. The infection is transmitted by trematodes known as Schistosoma haematobium. The goal of this study was to determine the occurrence of urinary schistosomiasis among primary school children in the Zaki Local Government Area, Bauchi State, Nigeria. A cross-sectional study involving 300 school pupils from three primary schools in Zaki was conducted between June and November of 2021. The urine samples were examined with the sedimentation technique to detect S. haematobium eggs. Data on socio-demographic characteristics and risk factors were obtained through a well-structured questionnaire. In SPSS version 24, the associations between the dependent and independent variables were evaluated with Chi-square, bivariate, and multiple logistic regression analyses. The strength of associations was determined with the odds ratio (OR) and 95% confidence interval. Urinary schistosomiasis was found in 29.7% of school-aged children in the three primary schools. Significantly higher prevalence was observed in the Almajiri (informal) school (59.6%) and one public primary school (31.5%), P = 0.001. Boys were four times more likely than girls to have schistosomiasis [AOR (95% CI): 4.38 (2.23–8.60)]. Children who played in shallow water had a higher risk of contracting schistosomiasis infection and were five times more likely to be infected [AOR (95% CI): 5.14 (1.97–13.37)]. Children who had blood in their urine (hematuria) were nearly nine times more likely to be infected [AOR (95% CI): 9.64 (4.79–20.66)]. The present study indicated that urinary schistosomiasis is endemic to the study area in the Zaki Local Government Area, with a moderate infection rate.

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Seasonal variability of intestinal helminths and Schistosoma haematobium in a rural area of the Sahel in Mali

Cited by 6 publications

References 0 publications

Prevalence and seasonal transmission of Schistosoma haematobium infection among school-aged children in Kaedi town, southern Mauritania

Prevalence and seasonal transmission of Schistosoma haematobium infection among school-aged children in Kaedi town, southern Mauritania

Trends in prevalence of soil‐transmitted helminth and major intestinal protozoan infections among school‐aged children in Nepal

Urinary Schistosomiasis and Associated Risk Factors Among Primary School Students in the Zaki Local Government Area, Bauchi State, Nigeria

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