[From experience in the prevention of chronic infections].
D000818:Animals; D002007:Brucellosis, Bovine / Q000517:prevention & control*; D002417:Cattle; D002908:Chronic Disease; D012426:Russia; D014380:Tuberculosis, Bovine / Q000517:prevention & control*
Iz opyta bor'by s khronicheskimi infektsiiami.