The virus of bovine virus diarrhea can cause diarrhea and death in young calves. Diarrhea begins 2 to 3 days after exposure and may persist for quite a long time. Ulcers on the tongue, lips, and in the mouth are the usual lesions that can be found in the live calf. These lesions are similar to those found in yearlings and adult animals affected with bovine virus diarrhea. Diagnosis is by history, lesions, and diagnostic laboratory assistance.
Treatment is similar to that used for other viral scours.
Bovine virus diarrhea is controlled by vaccinating all replacement heifers 1 to 2 months before breeding. Consult your veterinarian before starting a bovine virus diarrhea vaccination program. Many times this is the only organism identified following routine bacteriologic culturing. Certain E. coli can cause diarrhea. E. coli is always present in the intestinal tract and is usually the agent that causes a secondary infection following viral agents or other intestinal irritants.