URBAN TRANSMISSION OF URINARY SCHISTOSOMIASIS IN DAR-ES-SALAAM, TANZANIA

  • 1 January 1985
    • journal article
    • research article
    • Vol. 42  (1) , 71-78
Abstract
A cross sectional survey for Schistosoma haematobium infections was undertaken in 12 primary schools in the city of Dar es Salaam. The prevalence in the schools ranged from 5.3-55.1%, with an overall prevalence of 19.3%. More males (23.5%) than females (15.0%) were infected, and the highest prevalence was recorded in the 11-16 yr age group. Intensity of infection was high, ranging from 12-96 eggs/10 ml urine in individuals schools, 26% of the infected excreted more than 50 eggs/10 ml urine, and high rates of hematuria and proteinuria were observed in infected children. Interviews indicated that the majority of the children had acquired their infection in the city. Malacological surveys showed 2 potential vectors. Bulinus (Physopsis) globosus and B. (P.) nasutus, to be common in Dar es Salaam. Laboratory and field findings confirmed that these 2 spp. were vectors of S. haematobium. Factors responsible for continued transmission in this urban environment are discussed.