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BACKGROUNDChildhood mortality and morbidity due to RSV is increasing. Our current study was aimed at determining the sero-prevalence rate of RSV IgG antibodies and investigates certain known risk factors for RSV disease severity in infants and pre-school children presenting with various forms of respiratory tract infections in Ilorin, Nigeria.MATERIALS AND METHODSAbout 280, children and 30, aged matched controls were enrolled into the study at the specialist hospital Ilorin. Blood testing for anti RSV IgG was done using a commercial ELISA kit by IVD Research Inc® Carlsbad. California U.S.A. Information regarding Nutritional status, socio-economic status and other demographic variables were collected.RESULTSA prevalence rate of 85.7% was recorded among tested children and 23.3%, in controls, across age groups and gender. A statistically significant difference in age groups were recorded among patients with LRTI, (p <0.05), age <1 41%, age 1 <5, 27.6%. This was also the case for children with SRTI (Pneumonia and Bronchiolitis), with age < 1yr, 9%, and 1 <5yr, 19.8%. Analysed risk factors for disease severity showed thatnutritional status of children were statistically significant for disease severity, p-value, 0.039 (Chi square test).CONCLUSIONSWe report a high level of exposure to RSV in infancy and early childhood among children from a representative population in a major central Nigerian City, further studies into neutralising antibody levels and subtype distribution of RSV are advocated.

african journal of infectious diseases

Evaluation of IgG antibodies against Respiratory Syncytial Virus (RSV), and associated risk factors for severe respiratory tract infections in pre- school children in North-central, Nigeria