Evaluation of Rotavirus Infection and Diarrhea in Iowa Commercial Pigs Based on an Epidemiologic Study of a Population Represented by Diagnostic Laboratory Cases

Terry A. Proescholdt, Syeda Naheed Aktar, Kevan P. Flaming, Loren A. Will, Prem S. Paul, Young Soo Lyoo, Bruce H. Janke, Howard T. Hill, Lorraine J. Hoffman, Lie Ling Wu, Jerome Sacks

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Group A, B, and C rotaviruses were identified in 9% (96/1,048) of pig fecal specimens submitted to the Iowa State University Veterinary Diagnostic Laboratory during 1987 and 1988. Six of the rotaviruses were group B, 5 were group C, and the remaining 89% were group A. Of the rotavirus cases with more than 1 serotype, 5 were multiple group A serotypes, 1 involved a group A and B serotype, and 1 included 2 group C serotypes. A retrospective epidemiologic evaluation of pig diarrhea in herds of origin was done using data obtained from the accession records of the rotavirus and 88 matched nonrotavirus pig diarrhea control cases. Herds from which rotavirus cases were derived experienced lower morbidity, mortality, and case fatality rates than matched control herds. The incidence of diarrhea decreased rapidly among all pigs from birth to 3 weeks of age. The peak incidence for piglet diarrhea occurred in February, and a moderate rise occurred in August-September. Definitive evidence for transmissible gastroenteritis virus was found in 12% of nonrotavirus cases but none of the rotavirus cases in which it was sought. Other pathogenic microorganisms were identified less frequently and inconsistently.

Original languageEnglish (US)
Pages (from-to)416-422
Number of pages7
JournalJournal of Veterinary Diagnostic Investigation
Volume6
Issue number4
DOIs
StatePublished - Oct 1994

ASJC Scopus subject areas

  • veterinary(all)

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