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pubmed:abstractText |
The respiratory diseases of cattle are due to a combination of different factors among which figures a viral infection. The antiviral vaccination, perfectly possible owing to associated killed vaccines and live virus, is thus a very important element which must enter into every general plan of prophylaxis. Moreover, these plans will concern bacterial infections, conditions of rearing, etc. We have demonstrated that it is possible to produce good immunity in calves and sheep using a trivalent killed vaccine (parainfluenza 3, adenovirus 3 and reovirus 1). Possible interference with antibodies of maternal origin makes the multiplication of vaccine injections desirable.
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