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The epidemiology of a recent focus of mixed Schistosoma haematobium and Schistosoma mansoni infections around the 'Lac de Guiers' in the Senegal River Basin, Senegal. 1999

D De Clercq, and J Vercruysse, and M Picquet, and D J Shaw, and M Diop, and A Ly, and B Gryseels
Région Médicale de Saint Louis, Programme ESPOIR, Saint Louis, Senegal.

A village with mixed Schistosoma mansoni and S. haematobium infections (probably in a early endemic phase) was identified around the Lac de Guiers in the Senegal River Basin. In documenting the epidemiology of both schistosomes, we focused on prevalence and intensity of infection, transmission patterns and the impact of treatment. S. mansoni prevalences (near 100%) and egg counts (overall geometric mean eggs per gram of faeces (epg) of 589 were high in all age groups, with 35% of individuals excreting > 1000 epg, and showing a slow decline in egg output only after the age of 30 years. The overall prevalence (28%) and egg counts (2% > 50 eggs/10 ml) of S. haematobium were low, with mean counts of 6.3 eggs/10 ml. Maximal mean S. mansoni egg counts were found in 5-9 year-old boys and in 15-19 year-old girls; S. haematobium maximal counts in 1-4 year-old boys and in girls aged 5-9. Extremely high Biomphalaria pfeifferi infection ratios were recorded over the whole year. Following a single treatment, re-infection was rapid with prevalences and mean egg counts of both Schistosoma species reaching pretreatment levels within 7 months.

UI MeSH Term Description Entries
D007223 Infant A child between 1 and 23 months of age. Infants
D008297 Male Males
D010270 Parasite Egg Count Determination of parasite eggs in feces. Count, Parasite Egg,Counts, Parasite Egg,Egg Count, Parasite,Egg Counts, Parasite,Parasite Egg Counts
D011223 Praziquantel An anthelmintic used in most schistosome and many cestode infestations. Biltricide,Cesol,Cisticid,Cysticide,Droncit,Drontsit,EMBAY 8440,Prasiquantel,Praziquantel, (+-)-Isomer,Praziquantel, (R)-Isomer,Praziquantel, (S)-Isomer,Pyquiton,Traziquantel
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D004199 Disease Vectors Invertebrates or non-human vertebrates which transmit infective organisms from one host to another. Infectious Disease Vectors,Disease Vector,Disease Vector, Infectious,Disease Vectors, Infectious,Infectious Disease Vector,Vector, Disease,Vector, Infectious Disease,Vectors, Disease,Vectors, Infectious Disease
D005243 Feces Excrement from the INTESTINES, containing unabsorbed solids, waste products, secretions, and BACTERIA of the DIGESTIVE SYSTEM.
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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