Spontaneous subcutaneous hemorrhages in a chick fed a vitamin K deficient diet for 15 days. The bottom chick was fed an adequate diet and is the same age. The smaller of these littermate guinea pigs was fed a vitamin C deficient diet. Upper Gingivitis in adult scurvy. Lower Capillary fragility in vitamin C deficiency.
Petechial hemorrhages follow the application of a blood pressure cuff.
Periodic opthalmia in the horse. The most frequent manifestation of this deficiency in any susceptible specie is a vascularization of the cornea followed by ulceration and secondary infection. Other ocular signs are conjunctivitis excessive lacrimation and photophobia. Riboflavin is not a dietary requirement of functional ruminants because of bacterial synthesis. In the case of the young non-functional ruminant fed perified diets there may be a need for dietary thiamine.