The Association between Results of Broncheoalveolar lavage and Serology in the Detection of BRSV and PI3 in Clinically Healthy Veal Calves

Abstract

This paper analyses the relation between brochoalveolaire lavage (BAL) and serology, tested on eighty-one clinically healthy veal calves from six different herds. These herds frequently encounter respiratory outbreaks. In this study, Bovine Respiratory Syncytial Virus (BRSV) and Bovine parainfluenza type 3 virus (PI3) are looked for in the BAL brought in relation with possible seroconversion in the blood. BRSV was present in de BAL of 10 different calves and seroconversion has occurred twice, both of those instances tested negative in the BAL. PI3 has been found 26 times in the BAL and seroconversions has occurred 33 times. Of these 33 occurrences of seroconversion there were 12 cases in which the results of the BAL were also positive. No significant relation between BAL and serology has been found with both of these viruses and in none of the herds. This research can conclude that there is no relation between results from the BAL and serology.