Paradoxical helminthiasis and giardiasis in Cape Town, South Africa: epidemiology and control.

摘要: Background. South Africa has endorsed a World Health Assembly (WHA) resolution calling for control of soil-transmitted helminths (STHs). In Cape Town, services and housing that exist in old-established suburbs should minimise the prevalence intestinal parasitic infections, even when residents are poor. Where families live shacks densely-populated areas without effective sanitation, more than 90% children can be infected by STHs. The humoral immune response to worms theoretically favours infection Mycobacterium tuberculosis HIV. Objectives. Obtain estimates gender-, age-, school-related overall helminthiasis giardiasis low-income but well-serviced community. Assess possible sources infection. Alert health need measures threat from protozoal pathogens. Warn parasites may favour (TB) HIV/AIDS. Methods. A cross-sectional study was carried out large, non-selective sample attending nine schools. Gender, school age effects were related non-medical preventive services, sewage disposal practices Results. STH infestation rate 55.8%. Prevalence influenced not gender. Eggs cysts seen at following prevalences: Ascaris 24.8%; Trichuris 50.6%; Hymenolepis nana 2.2%; Enterobius 0.6%; Giardia 17.3%; hookworm 0.08%; Trichostrongylus 0.1%. Approximately 60% sludge is used form will contain viable eggs cysts. Conclusions. trends this old community Town could indicate swallowing or on food water, exposure polluted soil. Sewage effluent might adjacent, under-serviced, newer communities, promiscuous defaecation occurs. Probable vectors discussed. risk factor HIV/AIDS TB. Key words: Ascaris, , HIV/AIDS, hookworm, IgE, African Sciences Vol.5(2) 2005: 131-136