Transport of veal calves from birth farms to veal farms and calf  management in Swiss dairy farms

Schnyder, Petra; Schönecker, Lutz; Schüpbach‐Regula, Gertraud; Meylan, Mireille

doi:10.17236/sat00214

Cited by 6 publications

(1 citation statement)

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“…Farms were enrolled within the framework of a veal calf health research collaborative study supervised by one of the authors (M.M.). Within the framework of this collaborative study, extensive data on veal calf transport, barn climate, management and housing, AMU, AMR in bacteria of the respiratory and digestive tract, bacterial resistance to disinfectants, viral pathogens of the respiratory and digestive tract, animal welfare, and economics were collected [8,[33][34][35][36][37][38][39]. Farmers were not enrolled randomly but participated voluntarily, leading to a convenience sample of nasopharyngeal swab samples of Swiss veal calves.…”

Section: Farm Data and Sample Selectionmentioning

confidence: 99%

Prevalence of BRD-Related Viral Pathogens in the Upper Respiratory Tract of Swiss Veal Calves

Studer

Schönecker

Meylan

et al. 2021

Animals

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The prevention of bovine respiratory disease is important, as it may lead to impaired welfare, economic losses, and considerable antimicrobial use, which can be associated with antimicrobial resistance. The aim of this study was to describe the prevalence of respiratory viruses and to identify risk factors for their occurrence. A convenience sample of 764 deep nasopharyngeal swab samples from veal calves was screened by PCR for bovine respiratory syncytial virus (BRSV), bovine parainfluenza-3 virus (BPI3V), bovine coronavirus (BCoV), influenza D virus (IDV), and influenza C virus (ICV). The following prevalence rates were observed: BRSV, 2.1%; BPI3V, 3.3%; BCoV, 53.5%; IDV, 4.1%; ICV, 0%. Logistic mixed regression models were built for BCoV to explore associations with calf management and housing. Positive swab samples were more frequent in younger calves than older calves (>100 days; p < 0.001). The probability of detecting BCoV increased with increasing group size in young calves. Findings from this study suggested that young calves should be fattened in small groups to limit the risk of occurrence of BCoV, although an extended spectrum of risk factors for viral associated respiratory disorders such as nutritional aspects should be considered in future studies.

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