Article

A longitudinal cohort study in calves evaluated for rotavirus infections from 1 to 12 months of age by sequential serological assays.

Epidemiology Section, Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Building 50, Room 6308, Bethesda, MD 20892, USA.
Archives of Virology (impact factor: 2.11). 05/2009; 154(5):755-63. DOI:10.1007/s00705-009-0331-y pp.755-63
Source: PubMed

ABSTRACT Using an immunocytochemical staining assay involving six different recombinant baculoviruses with each expressing one of the major bovine rotavirus VP7 (G6, G8 and G10) and VP4 (P6[1], P7[5] and P8[11]) serotypes, we analyzed IgG antibody responses to individual proteins in archival serum samples collected from 31 calves monthly from 1 to 12 months of age during 1974-1975 in Higley, Arizona. Seroresponses to VP7 and VP4, as determined by a fourfold or greater antibody response, were not always elicited concurrently following infection: in some calves, (1) seroresponses to VP7 were detected earlier than to VP4 or vice versa; and (2) a subsequent second seroresponse was detected for VP7 or VP4 only. In addition, a second infection was more likely to be caused by different G and/or P types. Analyses of serum samples showed that the most frequent G-P combination was G8P6[1], followed by G8P7[5], G8P8[11] and G6P6[1].

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Keywords

12 months
 
archival serum samples
 
Arizona
 
different G
 
different recombinant baculoviruses
 
expressing one
 
frequent G-P combination
 
greater antibody response
 
immunocytochemical staining assay
 
individual proteins
 
major bovine rotavirus VP7
 
P types
 
Seroresponses
 
serum samples
 
subsequent second seroresponse