Farm Animal Medicine and Animal Health
Surveillance of Bovine Rotavirus A Diseases Using Diarrheic Samples from Calves Collected in Okayama Prefecture from 2017 to 2021
2023 Volume 76 Issue 9 Pages e264-e269
Details
2023 Volume 76 Issue 9 Pages e264-e269
The surveillance of bovine rotavirus A (RVA) diseases was performed using 516 diarrhea stool samples from 507 calves (2‐257 days old) collected in Okayama prefecture from 2017 to 2021. Bovine RVAs were detected in 152 of these samples (29.5%). There were no correlations between bovine RVA infection and number of treatments, age, outcome, season, or gender using statistical analyses. The G and P genotypes of the RVA in 25 bovine RVA-positive fecal samples were determined by sequencing the VP7 and VP4 genes. As a result, it was identified that the frequency of G6P[5], G6P[11], and G10P[11] were 32, 24 and 32%, respectively. These findings demonstrated there were multiple genotypes of bovine RVA in Okayama prefecture. The high prevalence of bovine RVA in calves with diarrhea in Okayama prefecture as well as those reported previously in other prefectures strongly suggests that bovine RVA is one of the major pathogens causing calf diarrhea.
