Bovine respiratory syncytial virus infection in feedlot cattle cases in Argentina

FERELLA, ALEJANDRA; STREITENBERGER, NICOLÁS; PÉREZ AGUIRREBURUALDE, MARÍA S.; DUS SANTOS, MARÍA J.; FAZZIO, LUIS E.; QUIROGA, MARÍA A.; ZANUZZI, CAROLINA N.; ASIN, JAVIER; CARVALLO, FRANCISCO; MOZGOVOJ, MARINA V.; UZAL, FRANCISCO A.

JOURNAL OF VETERINARY DIAGNOSTIC INVESTIGATION

AMER ASSOC VETERINARY LABORATORY DIAGNOSTICIANS INC

Año: 2023 vol. 35 p. 535 - 542

1040-6387

Although bovine respiratory syncytial virus (BRSV) infection has been reported in cattle in Argentina, it has not been associated with pneumonia in Argentina. We report here 5 cases of bovine pneumonia associated with BRSV. Autopsies were performed on 35 beef cattle with gross and/or microscopic lesions of pneumonia from 3 commercial feedlots. Lung samples in 5 of 35 animals were BRSV-positive by reverse-transcription nested PCR. The lungs of 2 of these 5 animals were coinfected with Mannheimia haemolytica, and 1 with bovine viral diarrhea virus 1. Microscopically, the lungs of 3 of the 5 BRSV PCR–positive animals had fibrinosuppurative bronchopneumonia, with or without pleuritis; 2 of the 5 had interstitial pneumonia. We conclude that BRSV is part of the bovine respiratory disease complex in Argentina.