• African health sciences · Sep 2015

    Seroprevalence of West Nile Virus specific IgG and IgM antibodies in North-Western and Western provinces of Zambia.

    • Idah Mweene-Ndumba, Seter Siziya, Mwaka Monze, Mazyanga L Mazaba, Freddie Masaninga, Peter Songolo, Peter Mwaba, and Olusegun A Babaniyi.
    • Immunization, Vaccines and Emergencies, World Health Organization Country Office, Lusaka, Zambia; Pathology and Microbiology Department, University Teaching Hospital, Lusaka, Zambia.
    • Afr Health Sci. 2015 Sep 1; 15 (3): 803-9.

    BackgroundWest Nile Virus (WNV) infection has been reported worldwide, including in Africa but its existence in Zambia is unknown. Symptoms for the virus include headache, myalgia, arthralgia and rash.ObjectivesThis study aimed to determine the seroprevalence of WNV and its correlates.MethodsA cross sectional study was conducted in North-Western and Western provinces of Zambia. Samples were subjected to IgG and IgM antibodies testing against WNV. Logistic regression analyses were conducted to determine magnitudes of association.ResultsA total of 3,625 of persons participated in the survey out of which 10.3% had WNV infection. Farmers were 20% (AOR=0.80; 95% CI [0.64, 0.99]) less likely to have infection compared to students. Meanwhile participants who lived in grass roofed houses were 2.97 (AOR=2.97; 95% CI [1.81, 4.88]) times more likely to be infected than those who lived in asbestos roofed houses. IRS was associated with reduced risk of infection (AOR=0.81; 95% CI [0.69, 0.94]). Travelling to Angola was associated with the infection [AOR=1.40; 95% CI [1.09, 1.81].ConclusionSpraying houses with insecticide residual spray would minimize mosquito-man contact. Furthermore, surveillance at the border with Angola should be enhanced in order to reduce importation of the virus into the country.

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