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Prevalence and intensity of urinary schistosomiasis among school children in the district of Niakhar, region of Fatick, Senegal



Urinary schistosomiasis is a parasitic disease that exists in all regions of Senegal. It is a major public health issue in this country. This study was carried out to determine the prevalence and intensity of this parasitosis in 12 villages of Niakhar (Fatick, Senegal).


A total of 210 schoolchildren, aged 7 to 15 years, were enrolled in this study, and urine samples were examined for Schistosoma haematobium eggs using a standard urine filtration technique.


Of these children, 121 (57.6%) were found to be infected with a mean geometric count of 185 eggs per 10 ml of urine. The disease was present in all surveyed villages, and the prevalence ranged from 14.3% to 92.8%. The prevalence of infection was significantly correlated with increasing age and was higher in boys. Infection intensity was significantly higher in boys but did not significantly differ with age. Significant relationships between i) water contact or access to running water and ii) the prevalence or intensity of urinary schistosomiasis were also noted.


The district of Niakhar is endemic for urinary schistosomiasis, with a high intensity of infection. A control program to decrease the prevalence and intensity should be implemented in this area to improve community health.


Schistosomiasis is a chronic and debilitating disease caused by digenetic trematode flatworms (flukes) of the genus Schistosoma. This water-dependent disease is endemic in rural areas where there is a lack of drinking water [1]. Schistosomiasis is one of the most common parasitic infections in the world, ranking second after malaria in terms of socio-economic and public health importance, especially in rural areas of developing countries [2, 3]. Of the 239 million people with active Schistosoma infections in 2009 [4], 85% lived in sub-Saharan Africa, where approximately 112 million and 54 million were infected with urinary and intestinal schistosomiasis, respectively, and the number of persons at risk of infection is greater than 600 million [5]. Therapeutic vaccines represent an alternative to chemotherapy (praziquantel) to control this disease [6]. However, the lack of epidemiological data on parasite prevalence may hamper control interventions and the development of vaccination strategies.

In Senegal, urinary schistosomiasis has been widespread and poses a public health problem, particularly in children [7, 8]. It is present in all regions of the country [9], with a mean estimated prevalence of 25% in 2003 [10]. In the Niakhar district, one previous study on the protective effect of schistosomiasis against malaria was carried out in two villages (Tukar and Diokhine), and the overall prevalence of urinary schistosomiasis was 67% [10]. As no mass treatment against this helminthiasis has been carried out in this area, the aim of the present study was to determine the prevalence and intensity of urinary schistosomiasis among school children.


Study area

The study was carried out at Niakhar (14°30′ N, 16°30′ W), a Demographic Site Survey (DSS) located in the region of Fatick (Sine-Saloum), 135 km east of Dakar, the capital of Senegal, West Africa. The study zone (Figure 1a) was approximately 15 km long and 15 km wide and covered 230 km2. The climate is continental Sudan-Sahelian, with temperatures ranging from 24°C in December-January to 30°C in May-June [11]. The rainy season spans four months (July-October), and the mean annual precipitation was 506 mm from 1962 to 2010 [12]. The district includes 30 villages with a total of 43,000 inhabitants [13], mainly of the serer ethnic group (96.4%) [14]. An environmental survey of this area has mapped all of the water sources (backwater, ponds, wells and supply taps), and it showed that the two-thirds of the population had no access to tap water [11]. A more detailed description of the Niakhar district has been given elsewhere [15].

Figure 1
figure 1

Localization of the studied area in Senegal (A) and distribution of prevalence and intensity of infection (B).

Selection of children

All the studies in the Niakhar district were conducted with the approval of the National Ethics Committee of Senegal. Oral consent was obtained after meeting with parents of schoolchildren and chiefs of the villages. A cross-sectional descriptive and analytical study was carried out from February to June 2009, and it involved children aged 7 to 15 years. The methodology used was cluster sampling, as recommended by the World Health Organization, with samples of at least 210 subjects each, which were divided into 30 clusters of at least 7 subjects. Because we had 20 primary schools, we decided to work on 15 clusters of 14 subjects each, giving us the same sample size of 210. The sampling interval (SI) was determined by the formula SI = M/n, with M as the total number of schoolchildren in 2009 and n as the number of clusters (SI = 6.873/15 = 458). To determine the first cluster for investigation, a random draw of numbers was made between 1 and the number corresponding to the sampling interval (458). The school with the closest number of schoolchildren to the SI number was chosen first. Other schools were selected as follows: E, E + SI, E + 2 SI, E + 3 SI … (E, number of children in the first selected school). The 15 clusters were distributed over 14 villages (out of the 20 villages that had at least a primary school). A total of 210 schoolchildren were enrolled in the study.

Sample collection and analysis

Urine samples were collected between 10:00 a.m. and 2:00 p.m., and their macroscopic aspect in transparent urine jars was examined. All samples that did not have a more or less dark yellow and a translucent aspect, without any particulates, were considered abnormal. We selected three macroscopic aspects: clear urine (urine of normal appearance and translucent), cloudy urine (urine of abnormal appearance, not translucent, with clots or suspension elements) and hematic urine (abnormal urine, non-translucent and red). Data were collected using a questionnaire whose reliability has been demonstrated in several countries for the detection of high-risk areas for schistosomiasis [16, 17]. This questionnaire was given to each urine-providing child to collect information on the child’s sex, age, water contact, symptoms of urinary schistosomiasis, knowledge about the disease, and previous praziquantel treatment. A plastic urine jar of 50 ml was then given to each child with a number corresponding to the questionnaire. Urine samples were transported to the Niakhar laboratory for analysis.

Microscopic examination of each urine sample for detection of S. haematobium eggs was performed using the method by Plouvier et al. [18]. In brief, 10 ml from each sample of urine was passed through a Millipore filter (12 μm polycarbonate filter), and this filter was analyzed with a 10 × objective. The number of eggs per filter was counted, and the infection intensity was classified as light (<50 eggs/10 ml of urine) or heavy (≥50 eggs/10 ml of urine), as defined by the World Health Organization [19].

Statistical analyses

Data were recorded using the Epi-Info, version 3.5.1 (August 13, 2008) and analyzed using STATA 11.1. The relationships between characteristics of human infection (prevalence and intensity) and other variables, such as the location of villages, sex and age of children, water contact, or access to tap water, were tested. Differences in percentages were analyzed using the χ2 test. The Geometric Means of Williams (GMW) was used for egg counts. The Mann–Whitney test was used for comparisons between the characteristics of human infection and the children’s sex, water contact or access to tap water, while the Kruskal-Wallis test was utilized for comparison between infection characteristics and the ages of children. Confidence intervals (CI) at 95% for GMW were estimated according to Kirkwood and Sterne [20]. A value of p < 0.05 was considered significant.

Ethical approval

All the studies in the Niakhar district were conducted with the approval of the National Ethics Committee of Senegal, followed by the local health authority. Before the study began, the chiefs of the villages and parents were fully briefed on the objective of the study. The study was explained to each participant for their understanding and cooperation. Parents and participants were asked to consent verbally to participate in the study; only those who provided consent were enrolled and requested to prove urine samples. At the end of the study, all the children registered were treated with praziquantel according to their weight (40 mg/kg).


Sample characteristics

The sex ratio (M/F) was 0.9, with 101 boys and 109 girls. The average age was 10.4 years (SD: 2.1 years). The individuals were divided into three age groups (7–9, 10–12 and 13–15 years), representing 37.2%, 41.4% and 21.4% of the children, respectively. Hematuria (52.4%) and dysuria (54.3%) were the most commonly reported symptoms by both infected and uninfected children. Abdominal pain (34.7%) was the least reported symptom. Macroscopic urine examination showed that clear urine (49%) was more frequent than cloudy urine (40%) or hematic (11%) urine. A few children (4.8%) had knowledge of schistosomiasis, and 5.5% had received previous treatments for this disease. A question on travel outside the Niakhar area showed that only 12% of children traveled to other regions during vacations. The others, especially the youngest, remained in their villages (Table 1).

Table 1 Reported symptoms and main characteristics of collected urine samples

Prevalence and intensity of S. haematobium infection

Of the 210 urine samples examined for S. haematobium, 121 (57.6%) were infected, with a mean geometric count (EMGC) of 185 [95% CI, 130–264] eggs/10 ml of urine, and 72.8% of the infected urine samples exceeded 49 eggs/10 ml of urine. The highest prevalence (> 90%) was found in the village of Kothiokh, and the lowest prevalence (< 25%) was found in the village of Ngonin. A significant relationship (p < 0.001) in the prevalence of infection between villages was noted. The greatest heavy infection intensities (> 90%) occurred in the villages of Ngayokhem, Ngonin and Poultok-Diokhine (Figure 1b).

Prevalence and intensity of S. haematobium infection in relation to water contact and access to tap water

The prevalence of infection was greater in persons who used backwater (69.6%) than those who used ponds (53.3%). A highly significant relationship (p < 0.01) was found between the prevalence of infection and the type of water contact. The highest EGMC, 202 (95% CI, 134–314) eggs/10 ml of urine, was found in persons who use ponds. People who did not have access to tap water had the highest prevalence and EGMC. Significant differences were also noted between prevalence and access to tap water (p < 0.005), and between intensity of infection and access to tap water (p < 0.005). If only the villages with tap water are considered, the prevalence and intensity of infection were significantly higher in boys than in girls (p < 0.01). In contrast, in villages without tap water, the prevalence and intensity of infection were higher in girls, but these differences were not significant (Table 2).

Table 2 Prevalence and intensity of Schistosoma haematobium witch respect to water contact and access to running water

Prevalence and intensity of S. haematobium infection by gender and age

Boys had a higher infection rate (66%) and EMGC (253 [162–396] eggs/10 ml of urine) than girls (49.5% and 126 [95% CI, 130–264] eggs/10 ml, respectively). Significant differences in prevalence values and intensities of infection according to sex (p < 0.05) were noted (Table 3). Boys were heavily infected regardless of age, but a significant difference (p < 0.05) was only noted between boys and girls in the 7–9 year group.

Table 3 Prevalence and egg count geometric mean of Schistosoma haematobium by gender and age of schoolchildren in the study villages

The prevalence of infection increased with age, and statistical analysis indicated a significant relationship (p < 0.05) between these two variables. The EMGC decreased in the 10–12 year group, before increasing again in the 13–15 year group. No significant difference between the age of children and the infection intensity was noted (Table 3). However, if boys and girls are grouped, the intensity of infection decreased with age in girls and increased in boys. The difference between boys and girls was also significant in the 7–9 year group (p < 0.05). The variables age, gender and access to water were confronted to villages with medium and high intensity but statistical analysis showed no significant difference (p > 0.05).


The results of the present study show that the Niakhar district is endemic for urinary schistosomiasis. The prevalence (57.6%) and intensity of S. haematobium infection (185 eggs/10 ml) indicate a high risk at the community level in accordance with the WHO definition [19]. This high rate of egg excretion might be due to the age group studied because children from 7 to 14 years old are the most important egg shedders [21, 22]. In addition, only 5.5% of children had received treatment for schistosomiasis, which would explain the rates observed. This finding is also attributable to intense water contact activities in the area. The same observation was also made in Senegal (in the region of Bignona, Casamance [23], at Barkedji in the department of Linguere [24]) and in several Nigerian villages around the Gusau dam, Zamfara [25]. Communities in the study area of Niakhar are rural, and most of the villages depend on backwater and ponds for their water needs, such as bathing, swimming, fishing and other domestic uses. These water bodies provide natural water sources and also serve as habitats to intermediate hosts (bulinids) and schistosome parasites. These water bodies constitute the main transmission foci of S. haematobium in the communities and are distributed throughout the area. These conditions make it certain that the people will continue to be infected and re-infected because no intervention strategy has been implemented in the area.

However, the differences found in the prevalence and intensity of infection between the villages investigated could be attributed to the fact that people living in Datel, Gajiak, Godel and Kothiokh were dependent on backwater as their principal water source during the rainy season. The high prevalence in these villages reflects the higher level of exposure and dependence of these inhabitants on backwater, which persists during the dry season [11, 14]. In addition, these villages did not have access to tap water [11]. The low prevalence observed in the other villages might be due to the fact that they depended on ponds, which dried more rapidly than backwater, and to the presence of running water for their daily uses. This observation agrees with other reports conducted in Nigeria [25, 26] where variability and epidemiology of the disease were attributable to water-contact patterns. It is also similar to the observations by Nkengazong et al. [27], who showed in south west Cameroon that villages without pipe-borne water access maintained a high level of infection. However, in some villages with running water in the Niakhar district, the prevalence was also high. This situation might be explained by other factors such as the proximity with ponds, lack of health education and poor hygiene.

The higher prevalence in boys than in girls confirms other reports for human infection in Senegal [24, 28] and in several different localities in West African countries [29, 30]. However, this result does not agree with the reports by Dabo et al. [31] in Mali and Ahmed et al. [32] in central Sudan, who found similar prevalence in boys and girls. EGMC was strongly correlated with gender, with boys being more heavily infected than girls. This difference noted in the Niakhar district may be due to cultural, behavioral and social factors. Indeed, during the rainy season, boys participate in various activities, such as swimming, washing domestic animals, fishing, etc., that create frequent and prolonged contact with water sources. In contrast, girls are restricted socially from water contact activities such as swimming and bathing. They also go to backwater and ponds for the washing of clothes or fetching water for domestic work. In villages with running water, girls usually stay at home and generally use tap water for housework, thus reducing their contact with other water sources. Boys thus constitute a high risk group for urinary schistosomiasis in Niakhar.

The highest prevalence values of urinary schistosomiasis were recorded in the 10–12 and 13–15 year groups. These age classes are most likely responsible for schistosomiasis transmission in the area. The increase of prevalence with increasing age of children was also noted in other African countries. In Burkina Faso, Poda et al. [33] found a significant difference between three age groups (7–9, 10–12, and 13–16 years). A similar result was also reported by Briand et al. [10] in two villages from the same district of Niakhar. In the present study, the percentage of infected schoolchildren in the 10–12 year group was practically equal to that noted in the 13–15 year group, and this last finding agrees with several reports [22, 34] where there was a peak at 10–14 years. No significant difference was observed between the age of children and the intensity of infection. This finding also agrees with previous reports [34, 35] where the intensity of infection did not show any significant difference with the age of children.

If children are grouped by age and sex, the intensity of S. haematobium infection increased with age in boys but decreased in girls. According to Gryseels et al. [1], the decline of intensity of infection among older children in some populations is due to a decreased contact with infected water [1]. In the Niakhar district, the decrease in infection observed among older girls might be explained by their seasonal migration to urban areas during the rainy season to seek employment as domestic workers [14]. Boys stay in the villages during the rainy season, thus maintaining a high intensity of egg parasites, most likely due to seasonal re-infection. A snail survey is needed to assess the role of water sources in the transmission of S. haematobium. The implementation of a control program in this area to decrease prevalence and intensity would also be highly suitable.


The results obtained show that the Niakhar area is endemic for urinary schistosomiasis. Health education and large-scale chemotherapy for all schoolchildren to decrease the prevalence and intensity of infection would be highly suitable. All the villages of the Niakhar district need access to piped water to reduce contact with infected waters.


  1. Gryseels B, Polman K, Clerinx J, Kestens L: Human schistosomiasis. Lancet. 2006, 368: 1106-1118. 10.1016/S0140-6736(06)69440-3.

    Article  PubMed  Google Scholar 

  2. Engels D, Chistsulo L, Montresor A, Savioli L: The global epidemiology situation of schistosomiasis and new approaches to control and research. Acta Trop. 2002, 82: 139-146. 10.1016/S0001-706X(02)00045-1.

    Article  CAS  PubMed  Google Scholar 

  3. King C: Toward the elimination of schistosomiasis. New Engl J Med. 2009, 360: 106-109. 10.1056/NEJMp0808041.

    Article  CAS  PubMed  Google Scholar 

  4. King CH, Olbrych SK, Soon M, Singer ME, Carter J, Colley DG: Utility of repeated praziquantel dosing in the treatment of schistosomiasis in high risk communities in Africa: a systematic review. PLoS Negl Trop Dis. 2011, 5: e1329-10.1371/journal.pntd.0001329.

    Article  Google Scholar 

  5. Martyne TS, Essame O, Ratard RC: High risk behaviours and schistosomiasis infection in Kumba, South-West Province, Cameroon. Int J Environ Res Pub Heath. 2007, 4: 101-105. 10.3390/ijerph2007040003.

    Article  Google Scholar 

  6. Riveau G, Deplanque D, Remoué F, Schacht AM, Vodougnon H, Capron M, Thiry M, Martial J, Libersa C, Capron A: Safety and immunogenicity of rSh28GST antigen in humans: phase 1 randomized clinical study of a vaccine candidate against urinary schistosomiasis. PLoS Neg Trop Dis. 2012, 6: e1704-10.1371/journal.pntd.0001704.

    Article  CAS  Google Scholar 

  7. Ndir O: Situation des schistosomoses au Sénégal. La lutte contre les schistosomoses en Afrique de l’Ouest. Edited by: Chippaux JP. 2000, Paris: IRD, 225-236.

    Google Scholar 

  8. Seck I, Faye A, Gning B, Tal-Dia A: La prévalence de la bilharziose urinaire et ses facteurs de risque en milieu scolaire rural à Fatick au Sénégal. Med Afr Noire. 2007, 54: 125-131.

    Google Scholar 

  9. Schur N, Hurlimann E, Garba A, Traore MS, Ndir O, Ratard RC, Tchuem Tchuenté LA, Kristensen TK, Utzinger J, Vounatsou P: Geostatistical model-based estimates of schistosomiasis prevalence among individuals aged ≤ 20 years in West Africa. PLOS Neg Trop Dis. 2011, 5: e1194-10.1371/journal.pntd.0001194.

    Article  Google Scholar 

  10. Briand V, Watier L, Le Hesran JY, Garcia A, Cot M: Co-infection with plasmodium falciparum and Schistosoma haematobium: protective effect of schistosomiasis on malaria in Senegalese children?. Am J Trop Med Hyg. 2005, 72: 702-707.

    PubMed  Google Scholar 

  11. Levi P, Adyamagbo A: Tableau de bord des principaux indicateurs sociodémographiques dans la zone de Niakhar (Sénégal). 2003, Dakar: IRD, 38 pp-

    Google Scholar 

  12. Trape JF, Sauvage C, Ndiaye O, Marra A, Diallo A, Cisse B, Greenwood B, Milligan P, Sokhna C, Molez JF: New malaria-control policies and child mortality in Senegal: reaching millennium development goal 4. J Infect Dis. 2012, 205: 672-679. 10.1093/infdis/jir805.

    Article  PubMed Central  PubMed  Google Scholar 

  13. Ndiaye O, Le Hesran JY, Etard JF, Diallo A, Simondon F, Ward MN, Vincent R: Variation climatique et mortalité attribuée au paludisme dans la zone de Niakhar, Sénégal, de 1984 à 1996. Cahiers Santé. 2001, 11: 25-33.

    CAS  PubMed  Google Scholar 

  14. Chippaux JP: Recherche intégrée sur la santé des populations à Niakhar (Sahel sénégalais). 2005, Paris: IRD, 32-

    Google Scholar 

  15. Delaunay V, Marra A, Levi P, Etard JF, INDEPTH: Site de suivi démographique de Niakhar, Sénégal. Population et santé dans les pays en développement. 2003, 1: 313-321.

    Google Scholar 

  16. Mafe MA, Von-Stamm T, Utzinger J, N’Goran EK: Control of urinary schistosomiasis: an investigation into the effective use of questionnaires to identify high risk com-munities and individuals in Niger State, Nigeria. Trop Med Int Heath. 2000, 5: 53-63. 10.1046/j.1365-3156.2000.00508.x.

    Article  CAS  Google Scholar 

  17. Van der Werf MJ, De Vlas SJ: Diagnosis of urinary schistosomiasis: a novel approach to compare bladder pathology measured by ultrasound and three methods for hematuria detection. Am J Trop Med Hyg. 2004, 71: 98-106.

    PubMed  Google Scholar 

  18. Plouvier S, Leroy JC, Colette J: A propos d’une technique simple de filtration des urines dans le diagnostic de la bilharziose urinaire en enquête de masse. Med Trop. 1975, 35: 229-230.

    Google Scholar 

  19. World Health Organization: Prevention and control of schistosomiasis and soil-transmitted helminthiasis: report of a WHO expert committee. WHO Tech Rep Ser. 2002, 912: 1-57.

    Google Scholar 

  20. Kirkwood BR, Sterne Jonathan AC: Essential medical statistics. 2003, Wiley-Blackwell, 2

    Google Scholar 

  21. Ould Ahmed Salem CB, Alassane MT: Prevalence and parasite load of urinary schistosomiasis in schoolchildren in the Wilaya of Gorgol in Mauritania. Trop Med. 2011, 71: 261-263.

    CAS  Google Scholar 

  22. Deribe K, Eldaw A, Hadziabduli S, Kailie E, Omer MD, Mohammed AE, Jamshed T, Mohammed EA, Mergani A, Ali GA, Babikir K, Adem A, Hashim F: High prevalence of urinary schistosomiasis in two communities in South Darfur: implication for interventions. Parasit Vectors. 2011, 4: 14-10.1186/1756-3305-4-14.

    Article  PubMed Central  PubMed  Google Scholar 

  23. Gaye O, Diallo S, Ndir O, Bah I, Ndiaye A, Faye O: Epidémiologie des endémies parasitaires dans la région du barrage anti-sel de Bignona (Sénégal). Dakar Med. 1991, 39: 139-144.

    Google Scholar 

  24. Thiam I: PhD thesis. Bilharziose urinaire dans la zone du Ferlo : études menées à Barkédji dans le département de Linguère. 1993, Cheikh Anta Diop University

    Google Scholar 

  25. Ladan MU, Abubakar U, Abdullah K, Bunza MDA, Ladan MJ, Adamu : Urinary schistosomiasis in selected villages around Gusau Dam Site, Zamfara State, Nigeria. Niger J Basic Appl Sci. 2012, 20: 189-194.

    Google Scholar 

  26. Ugbomoiko US: The prevalence, incidence, and distribution of human urinary schistosomiasis in Edo State Nigeria. Niger J Parasitol. 2000, 24: 642-643.

    CAS  Google Scholar 

  27. Nkengazong L, Njiokou F, Asonganyi T: Two years impact of single praziquantel treatment on urinary schistosomiasis in the Barombi Kotto focus, South West Cameroon. J Parasitol Vect Biol. 2013, 5: 83-89.

    Google Scholar 

  28. Ka Y: PhD thesis. Prévalence de la bilharziose urogénitale à Schistosoma haematobium dans le district sanitaire de Bambey : étude comparative de l’enquête par questionnaire et de l’enquête parasitologique. 2002, Cheikh Anta Diop University

    Google Scholar 

  29. Ugbomoiko US, Ofoezie IE, Okoye IC, Heukelbach J: Factors associated with urinary schistosomiasis in two periurban communities in south-western Nigeria. Ann Trop Med Parasitol. 2010, 104: 409-419. 10.1179/136485910X12743554760469.

    Article  CAS  PubMed  Google Scholar 

  30. Nanvya TN, Dakul DA, Mwansat GS: Schistosomiasis in Ndinjor district of Langtang, North Local Government area of Plateau State, Nigeria. Niger J Parasitol. 2011, 32: 209-214.

    Google Scholar 

  31. Dabo A, Badawi HM, Bary B, Doumbo OK: Urinary schistosomiasis among preschool-aged children in Sahelian rural communities in Mali. Parasit Vectors. 2011, 4: 21-10.1186/1756-3305-4-21.

    Article  PubMed Central  PubMed  Google Scholar 

  32. Ahmed AM, Abbas H, Mansour AF, Gasim G, Adam I: Schistosoma haematobium infections among schoolchildren in central Sudan one year after treatment with praziquantel. Parasit Vectors. 2012, 5: 108-10.1186/1756-3305-5-108.

    Article  PubMed Central  CAS  PubMed  Google Scholar 

  33. Poda JN, Sorgho H, Dianou D, Sawadogo B, Kambou T, Parent G, Sondo B: Profil parasitologique de la schistosomose urinaire du complexe hydro-agricole du Sourou au Burkina Faso. Bull Soc Path Exot. 2001, 94: 21-24.

    CAS  Google Scholar 

  34. Ekpo UF, Laja-Deile A, Oluwole AS, O Sam-Wobo S, Mafiana CF: Urinary schistosomiasis among preschool children in a rural community near Abeokuta, Nigeria. Parasit Vectors. 2010, 3: 58-10.1186/1756-3305-3-58.

    Article  PubMed Central  PubMed  Google Scholar 

  35. Traoré LK, Ouedraogo LH, Pietra V, Nacoulma I, Nebie B, De Salles Pafadnam F: Prévalence de l’infection à Schistosoma haematobium et relations bilharziose hématurie dans deux villages du Burkina Faso. Med Afr Noire. 1990, 37: 100-107.

    Google Scholar 

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We thank Paul Senghor for the technical assistance. We thank Kory Faye, deceased, our guide during this study.

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Correspondence to Cheikh Sokhna.

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Authors’ contributions

Conceived and designed the study: AD, CTB and BS. Performed field activity: AD and BS. Performed the experiment: BS. Analyzed the data: SNS, FFD-T, LG and BS. Wrote the paper: BS, SD, FFD-T., LG and MON. Supervised the study: AD, CTB and CS. All authors approved the final version of the manuscript.

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Senghor, B., Diallo, A., Sylla, S.N. et al. Prevalence and intensity of urinary schistosomiasis among school children in the district of Niakhar, region of Fatick, Senegal. Parasites Vectors 7, 5 (2014).

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