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OJVRTM
Online Journal of
Veterinary Research©
(Including Medical and
Laboratory Research)
Established 1994
ISSN 1328-925X
Volume 26 (2):106-116, 2022.
Prevalence of Rotavirus and Coronavirus in feces of newborn calves
with diarrhea
Afshari Safavi EA1, Mohammadi
GR1, Mayameii A2
Department (s) 1Clinical
Studies, 2Pathobiology, School of Veterinary Medicine, Ferdowsi
University of Mashhad, Iran.
ABSTRACT
Safavi EA, Mohammadi GR, Mayameii
A., Rotavirus and Coronavirus
in feces of newborn calves with diarrhea, Onl J Vet
Res., 26 (2):106-116, 2022. A 1:1 matched case-control study of calves under
1 month of age was carried out by weekly visits to 7 dairy farms in Mashhad,
Iran. Fecal samples were collected from 112 calves with diarrhea and 112 controls
matched assessed by scoring. Rotavirus and Coronavirus were
isolated by antigen capture ELISA test. We found Rotavirus antigen in
29.5% in diarrheic and 17% in normal calves. We detected Coronavirus
antigen in 2.7% and 1.8%, respectively. In diarrheic calves Rotavirus
was most prevalent at 3rd week age whereas Coronavirus was found
in very few cases by 2nd week. Excretion
of Rotavirus in feces of scouring calves was greater (P < 0.03) than controls
with odds ratio of 1.9 (1.05 – 3.76). We found no relationship between shedding
Coronavirus in feces and diarrhea (P value =0.66) with odds ratio equals
to 1.4 (0.24 –9.05). We find that Rotavirus is associated with newborn calf
diarrhea in industrial dairy farms in Iran.
Keywords:
Rotavirus; Coronavirus; matched case-control study; newborn dairy
calves; diarrhea; Iran.
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