Studies on an outbreak of intestinal coccidiosis in the dog

An outbreak of intestinal coccidiosis in the dog due to Isospora canis characterized by mild severe haemorrhagic diarrhoea of sudden onset, acute abdominal pain, anorexia, dehydration and relative polycythaemia is described. Although clinical recovery followed sulphonamide therapy, reinfection was common within 10 days of treatment.