The value of incidence for the assessment of schistosomiasis control. A study in Southern Rhodesia

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Rapid assessment of the rate of transmission of schistosomiasis is essential in any control program. It has been demonstrated that, by following the pattern of infection developing during a longitudinal study in a cohort of children under 6 yr of age, it is possible to calculate the incidence of schistosomiasis in the community represented by that cohort. Children who were found by survey to be free from active infection with schistosomes were examined at intervals of 1, 3, or 4 mth to determine the rate at which infections of either Schistosoma mansoni or S. haematobium occurred. This gave an immediate measure of the rate of transmission during the period under study. The rate can be calculated for unit time, in this study figures were extrapolated to 120 days. Data are presented to show how the incidence measured reflects the efficiency of snail control procedures carried out in the different farming areas.

Original languageEnglish (US)
Pages (from-to)409-414
Number of pages6
JournalBulletin of the World Health Organization
Issue number4
Publication statusPublished - 1973
Externally publishedYes


ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health

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