Effects of 4-methylimidazole in young calves.

Clinical signs, gross and histologic necropsy findings and dose response curves of 4-methylimidazole (4-MI) were determined in young Holstein calves. Three-day-old Holstein bull calves were given an oral dose of 0,25,50,100,200 or 400 mg 4-MI/kg body weight. Acute clinical signs were hypersalivation, mouth chomping, diarrhea, muscle fasciculations, tremors, hyperexcitability, convulsions, coma and death.

Effects of xanthene dyes in cattle diets for insect control: diet digestibility and fecal excretion.

The effects of rose bengal, erythrosin B and fluorescein on ruminant digestion were evaluated by an in vitro rumen technique. Rose bengal reduced in vitro dry matter disappearance (IVDMD) values starting at .5 mM in the nutrient media and erythrosin B reduced IVDMD values starting at .

The specificity of naturally occurring heterophile antibodies in normal rabbit serum.

Rabbit sera used as a complement source contain cytotoxic antibodies which reacted with cultured human cells. This cytotoxic activity can be inhibited by human IgM. The capacity of IgM mu and L chains, and IgM glycopeptides to inhibit these heterospecific antibodies was determined.