Introduction Isospora belli History of Discovery Transmission Clinical Presentation Treatment Web Links References

History of Discovery

Isosporiasis was first observed by Dr. H.M. Woodcock in Autumn of 1915. While observing World War I soldiers serving in the Dardanelles area, he discovered coccidian cysts in the feces of the soldiers. These cysts, as Dr. Woodcock noted, were "generally abuot 32 by 14 microns". He identified the causative organism to be of the genus Isospora. When compared to later incidences of the disease, Dr. Woodcock's discovery was identified as the first known instance of Isosporiasis (8).

Dr. Woodcock's original drawing of a coccidian cyst of I. belli (8)