Prevalence and Genotypes of Parvovirus B19 Among HIV Positive Children

  • Bisola Olawunmi Aleru
  • B A Olusola
  • A O Faneye
  • Georgina N Odaibo
  • David O Olaleye


Human Parvovirus B19 (B19V) is a global infection with over 50% of infected children residing in sub-Saharan Africa. It causes persistent anaemia in immuno-compromised states such as HIV infection, thereby complicating the course of HIV infection. This study was therefore designed to determine the prevalence and genotypes of B19V among HIV positive children. Blood specimen was collected from HIV positive children and genomic DNA extracted and assayed for the presence of Parvovirus B19 DNA by polymerase chain reaction and the product detected by gel electrophoresis. Amplicons for positive PCR were purified and sequenced for genotype analysis. For the purpose of comparison (differences in the sequences of the NS1/VP1u region), nine HIV negative children were enrolled in this study. Two (1.3%) of the 158 HIV infected children were positive for Parvovirus B19 DNA. Analysis of the results showed significant relationship between Parvovirus B19 infection and the severity of anaemia (p=0.015). Phylogenetic analysis of the sequence data showed that all the B19 virus isolates detected in this study were genotype 1A. Nucleotide sequence changes and amino acid mutations were observed among the sequenced samples. This study therefore has been able to give an insight to the prevalence and circulating genotypes of Parvovirus B19 among HIV infected children and also establishing a relationship between anaemia and parvovirus B19 infection


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Section C (Clinical and Laboratory Research)