The Influence of Passive Immunity on Calves Respiratory Disease Associated with Parainfluenza-3 Virus and Respiratory Syncytial Virus

Algirdas Salomskas

Abstract


The aim of our study was to investigate the dynamics and duration of maternal immunity to bovine PI-3 and RS viruses and the influence of passively acquired antibodies on calves’ health. Total 24 calves from one farm were selected for the trial based on the IgG concentration in the blood serum. The calves were allocated into three groups 8 individuals in each: The blood samples of these calves periodically were tested for antibodies to PI-3 and RS viruses. Also the number of calves with respiratory diseases, duration of disease, number of treatments and deaths were registered. We established that the morbidity and mortality rates were comparable in all groups of animals but the calves who received sufficient amount of colostrum were diseased for a shorter time and suffered milder clinical signs.


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BIOMEDICAL ENGINEERING CONFERENCE ORGANIZING COMMITEE,

BIOMEDICAL ENGINEERING INSTITUTE,

KAUNAS UNIVERSITY OF TECHNOLOGY.