Urban schistosomiasis in Lusaka, Zambia: a preliminary study

Area of Science:

• Public Health
• Infectious Diseases
• Tropical Medicine

Background:

• Schistosomiasis is a significant public health concern in many tropical and subtropical regions.
• Urban transmission of schistosomiasis is increasingly recognized, yet data from many African cities remain limited.
• Understanding local transmission dynamics is crucial for effective control strategies.

Purpose of the Study:

• To assess the prevalence and extent of schistosomiasis transmission in Lusaka, Zambia.
• To identify risk factors and knowledge gaps related to schistosomiasis among schoolchildren.
• To investigate the presence of snail intermediate hosts in urban water bodies.

Main Methods:

• A cross-sectional survey involving 240 schoolchildren from seven socio-economically diverse schools in Lusaka.
• Parasitological examination of stool and urine samples for Schistosoma species.
• Questionnaires administered to students regarding disease knowledge and potential exposure.
• Environmental assessment of nearby water bodies for snail intermediate hosts.

Main Results:

• An overall prevalence of 20.9% for Schistosoma haematobium infection was detected among the surveyed children.
• Prevalence rates for S. haematobium varied significantly between schools, ranging from 7.5% to 37.5%.
• Only one case of Schistosoma mansoni infection was identified, suggesting limited transmission of this species.

Conclusions:

• Schistosomiasis, particularly S. haematobium, is actively transmitted within the urban environment of Greater Lusaka.
• The findings highlight the need for targeted interventions and public health awareness campaigns in Lusaka.
• Further research is warranted to fully elucidate transmission pathways and inform control efforts in urban settings.