{"title":"Field trials of a bovine respiratory syncytial virus vaccine.","authors":"R E Bohlender","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>A vaccine against bovine respiratory syncytial virus (BRSV: Norden), a cause of pulmonary edema-emphysema and pneumonia in calves, was evaluated in field trials on western Nebraska beef calves at branding, preweaning, weaning and postweaning. Of calves with undifferentiated respiratory infection at weaning, 20.9% of 2-dose vaccinates (169/810) and 27.5% of 1-dose vaccinates (230/837) required treatment, vs 48.2% of unvaccinated controls (397/823). At postweaning, 2.4% of 2-dose vaccinates (13/548) and 4.7% of 1-dose vaccinates (28/598) required treatment, vs 20.5% of controls (181/885). Studies in the 2 subsequent years revealed 11.3% of calves vaccinated at preweaning (263/2312) required treatment, vs 24.4% of controls (387/1587). Average costs from respiratory disease in 5 herds ranged from $12.83/head to $46.99/head before BRSV vaccination and 4/head to 54/head after vaccination.</p>","PeriodicalId":76173,"journal":{"name":"Modern veterinary practice","volume":"65 8","pages":"606-9"},"PeriodicalIF":0.0000,"publicationDate":"1984-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Modern veterinary practice","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
A vaccine against bovine respiratory syncytial virus (BRSV: Norden), a cause of pulmonary edema-emphysema and pneumonia in calves, was evaluated in field trials on western Nebraska beef calves at branding, preweaning, weaning and postweaning. Of calves with undifferentiated respiratory infection at weaning, 20.9% of 2-dose vaccinates (169/810) and 27.5% of 1-dose vaccinates (230/837) required treatment, vs 48.2% of unvaccinated controls (397/823). At postweaning, 2.4% of 2-dose vaccinates (13/548) and 4.7% of 1-dose vaccinates (28/598) required treatment, vs 20.5% of controls (181/885). Studies in the 2 subsequent years revealed 11.3% of calves vaccinated at preweaning (263/2312) required treatment, vs 24.4% of controls (387/1587). Average costs from respiratory disease in 5 herds ranged from $12.83/head to $46.99/head before BRSV vaccination and 4/head to 54/head after vaccination.