Journal
CANADIAN JOURNAL OF MICROBIOLOGY
Volume 56, Issue 7, Pages 569-577Publisher
NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS
DOI: 10.1139/W10-042
Keywords
Porcine astrovirus (PAstV); Human astrovirus (HAstV); recombination; phylogenetic tree
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Funding
- ICGEB-OPS-RELAB [CRP.LA/MEX03-01, CRP/04/10]
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Porcine astrovirus (PAstV) has been poorly studied and has been associated mainly with gastroenteritis. Computational analysis has revealed the close relationship of PAstV with astroviruses of humans (HAstV) and cats (FAstV). In this study, 105 and 171 stool specimens were collected from piglets and children under 5 years of age, respectively, in different Colombian regions during a 1-year period. The stool samples were examined for astroviruses by ELISA and RTPCR; 23.8% and 4% were found to be positive for PAstV and HAstV, respectively. Additional sequence analysis with partial sequences obtained from ORF2 identified at least 2 probable groups of PAstVs and possible recombination events between porcine and human astroviruses. This study provides preliminary evidence of the high presence of PAstVs in pigs and proposes the existence of multiple PAstV types that are evolutionarily closely related to HAstVs.
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