The effect of vaccination of lambs with live parainfluenza virus type 3 on pneumonia produced by parainfluenza virus type 3 and Pasteurella haemolytica |
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| Authors: | Allison R. McCarthy Rosemary A. Penwarden |
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| Affiliation: | Research Division, Ministry of Agriculture and Fisheries , Wallaceville Animal Research Centre , Private Bag, Upper Hutt |
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| Abstract: | Groups of 20 lambs were vaccinated with parainfluenza virus type 3 PI3 by the intranasal (I.N.) or intramuscular route (I.M.).Approximately 6 weeks later, vaccinated and non-vaccinated lambs were challenged sequentially with PL3, and Pasteurella haemolytica. At slaughter, 10 to 12 days after challenge, 65% of non-vaccinates and 45% of I.M. vaccinates had pneumonic lesions whereas lesions were not observed in any of the I.N. vaccinates. |
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