Secondary Deficiency of Vitamin B1 and Riboflavin in the Blacktongue Producing Diet

Abstract

Thirty-three dogs in 133 attacks of blacktongue were studied in their response to treatment with 1) liver, 2) nicotinic acid alone, 3) adenylic acid from muscle, and 4) nicotinic acid combined with vitamin B₁ (thiamin) and vitamin B₂ (riboflavin). It is concluded then that under the conditions of these experiments both riboflavin and vitamin B₁ (thiamin) are secondary deficiencies of our blacktongue producing diet. It appears also that the dog's requirement for vitamin B₁ is markedly increased by repeated attacks of blacktongue.