Publications

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modelling spatial distribution of snails transmitting parasitic worms with importance to human and animal health and analysis of distributional changes in relation to climate.the environment, the on-going global climate change and the ecology of animal species determine the localisation of habitats and the geographical distribution of the various species in nature. the aim of this study was to explore the effects of such changes on snail species not only of interest to naturalists but also of importance to human and animal health. the spatial distribution of freshwater snail intermediate hosts involved in the transmission of schistosomiasis, fascioliasis and paramphi ...201424893011
schistosomiasis in malawi: a systematic review.schistosomiasis remains an important public health problem that undermines social and economic development in tropical regions of the world, mainly sub-saharan africa. we are not aware of any systematic review of the literature of the epidemiology and transmission of schistosomiasis in malawi since 1985. therefore, we reviewed the current state of knowledge of schistosomiasis epidemiology and transmission in this country and identified knowledge gaps and relevant areas for future research and re ...201425490938
prevalence and transmission dynamics of schistosoma haematobium infection in a rural community of southwestern ebonyi state, nigeria.a twelve-month epidemio-ecological study on the prevalence, infection intensity, water contact and vector aspects of urinary schistosomiasis was conducted in a rural community of south-west ebonyi state, nigeria, using standard procedures, and involving 894 individuals (527, 58.9% males; and 367, 41.1% females). an overall community prevalence (15.3%) was established with more males (20.7%) than females (7.6%) being significantly positive for both micro-and macro-haematuria (χ² = 0.806; df = 1, ...201424862047
significant population genetic structure of the cameroonian fresh water snail, bulinus globosus, (gastropoda: planorbidae) revealed by nuclear microsatellite loci analysis.in order to characterize the demographic traits and spatial structure of cameroonians bulinus globosus, intermediate host of schistosoma haematobium, genetic structure of seven different populations, collected from the tropical zone, was studied using six polymorphic microsatellites. intrapopulation genetic diversity ranged from 0.37 to 0.55. interpopulation genetic diversity variation clearly illustrated their significant isolation due to distance with gene flow substantially limited to neighbo ...201424751417
schistosomiasis in pre-school-age children and their mothers in chikhwawa district, malawi with notes on characterization of schistosomes and snails.to complement ongoing schistosomiasis control within national control programmes (ncps) that administer praziquantel to school-age children, assessing the risk and extent of schistosomiasis in pre-school-age children (psac) is important.201424690282
schistosomiasis outbreak investigation, empandeni ward, mangwe district, matabeleland south province, june 2012; a case control study.on 20th of june 2012, 31 pupils from kwite primary school reported to the local clinic complaining of passing bloody urine. a study was conducted to identify factors, the etiology and risks of contracting the disease.201425204324
urinary schistosomiasis among preschool children in malengachanzi, nkhotakota district, malawi: prevalence and risk factors.this study was designed to determine the prevalence of and risk factors for schistosomiasis among a group of preschool children in malawi. schistosomiasis burden among preschoolers in malawi is not well documented in the literature.201627217911
effects of endosulfan on predator-prey interactions between catfish and schistosoma host snails.the effect of the pesticide endosulfan on predator-prey interactions between catfish and schistosoma host snails was assessed in static tank experiments. hybrid catfish (clarias gariepinus × c. ngamensis) and bulinus globosus were subjected to various endosulfan concentrations including an untreated control. the 48- and 96-h lc50 values for catfish were 1.0 and <0.5 µg/l, respectively, whereas the 48- and 96-h lc50 values for snails were 1137 and 810 µg/l. to assess sublethal effects on the feed ...201627033099
urogenital schistosomiasis transmission on unguja island, zanzibar: characterisation of persistent hot-spots.elimination of urogenital schistosomiasis transmission is a priority for the zanzibar ministry of health. preventative chemotherapy together with additional control interventions have successfully alleviated much of the disease burden. however, a persistently high schistosoma haematobium prevalence is found in certain areas. our aim was to characterise and evaluate these persistent "hot-spots" of transmission and reinfection in comparison with low-prevalence areas, to support the intervention pl ...201627986092
modelling the spatial and seasonal distribution of suitable habitats of schistosomiasis intermediate host snails using maxent in ndumo area, kwazulu-natal province, south africa.schistosomiasis is a snail-borne disease endemic in sub-saharan africa transmitted by freshwater snails. the distribution of schistosomiasis coincides with that of the intermediate hosts as determined by climatic and environmental factors. the aim of this paper was to model the spatial and seasonal distribution of suitable habitats for bulinus globosus and biomphalaria pfeifferi snail species (intermediate hosts for schistosoma haematobium and schistosoma mansoni, respectively) in the ndumo area ...201627814746
population genetic structure of the freshwater snail, bulinus globosus, (gastropoda: planorbidae) from selected habitats of kwazulu-natal, south africa.the freshwater snail bulinus globosus is an important intermediate host of schistosoma haematobium, the causative agent of urinary schistosomiasis. this disease is of major health concern, especially in africa where the majority of cases have been reported. in this study the inter- and intra-genetic diversity and population genetic structure of b. globosus from nine locations in the kwazulu-natal province of south africa was studied using four polymorphic microsatellite loci (bgz1-bgz4). moderat ...201627267152
[preliminary evaluation of morbidity due to s. haematobium and s. mansoni in the area of the future adjarala dam in benin].the aim of this study was to provide a preliminary assessment of morbidity due to schistosomiasis in the area of the future adjarala dam in benin. we included 412 schoolchildren from five villages in the study. the mean age of the children was 9.4 +/- 2.3 years and the sex ratio (f/m) was 0.94. these children underwent parasitological examination. the children provided urine samples, which were examined by eye, filtered and tested for blood and protein. stool samples were examined using kato's t ...201611125338
[comparative study of schistosomiasis transmission (urinary and intestinal forms) at 10 sites in burkina faso (in sub-saharan africa)].despite great progress in schistosomiasis control over the past decade in burkina faso, this disease remains a public health problem. this study analyzes parasitologic data from investigations of schistosoma haematobium, s. mansoni, and mollusks. the prevalence rate of s. haematobium varies from 3.3% to 50.4%; that for s. mansoni (tested only in the western part of the country) from 3.3% to 39.1%. prevalence rates are higher in school-aged boys than girls, but the reverse is true among adults. s ...201623174311
divergent effects of schistosoma haematobium exposure on intermediate-host snail species bulinus nasutus and bulinus globosus from coastal kenya.schistosoma haematobium infection causes urogenital schistosomiasis, a chronic inflammatory disease that is highly prevalent in many parts of sub-saharan africa. bulinid snails are the obligate intermediate hosts in the transmission of this parasite. in the present study, bulinus globosus and bulinus nasutus snails from coastal kenya were raised in the laboratory and exposed to miracidia derived from sympatric s. haematobium specimens to assess the species-specific impact of parasite contact and ...201728115664
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