Examination of virus shedding in semen from vaccinated and from previously infected boars after experimental challenge with porcine reproductive and respiratory syndrome virus

Author: Nielsen T.L.   Nielsen J.   Have P.   Baekbo P.   Hoff-Jorgensen R.   Botner A.  

Publisher: Elsevier

ISSN: 0378-1135

Source: Veterinary Microbiology, Vol.54, Iss.2, 1997-02, pp. : 101-112

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