Figure 1.
A black rectangle in the national map indicates the position of the area shown in the main map frame. Small squares in the main frame indicate house of 310 schoolchildren. Dotted red circles indicate the extent of the area from which children attend the schools.
Table 1.
Potential risk factors of Schistosoma mansoni infection.
Table 2.
Prevalence of parasitic infections among schoolchildren, Mbita, Kenya.
Table 3.
Intensity of Schistosoma mansoni infection among schoolchildren in Mbita, Kenya.
Figure 2.
Intensity of S. mansoni infection among primary school children in Mbita, Kenya.
The intensity of S. mansoni infection was mapped at the household level. According to the WHO guidelines, S. mansoni infection was categorized as: negative, light (1–99 epg), moderate (100–399 epg) or heavy (≥400 epg) infection. The number in the parentheses shows the geometric mean of the number of eggs in each school. Population density of each 500 m grid is shown in the background. The red solid circle indicates the unadjusted high risk cluster whereas the orange dotted circle indicates the cluster adjusted for potential risk factors as follows: sex, population density, house structure and latrine availability.
Table 4.
Bivariate negative binomial generalized linear model (NB-GLM) for Schistosoma mansoni infection risk among schoolchildren Mbita, Kenya.
Figure 3.
Relationship between local population density and intensity of S. mansoni infection.
Scatter plot showing positive association between intensity of S. mansoni infection and population density. The population density and the intensity were expressed as the number of people within a radius of 1 km and log10 (epg+1), respectively.
Table 5.
Bivariate negative binomial generalized linear mixed model (NB-GLMM) for Schistosoma mansoni infection risk among schoolchildren Mbita, Kenya.