Hemorrhage and passage of blood in the droppings of chickens are obvious symptoms of cecal coc-cidiosis, caused by the protozoan, Eimeria tenella. With the onset of the hemorrhagic phase of the disease on the 5th day, there is an increase in the blood sugar. This rise con-tinues upward through the 7th day. During this period, the blood chlorides rise, starting on the 6th day. An increase in these 2 constituents, approximate to that brought about by bleeding from coccidiosis, is obtained when chickens are artificially bled. The chloride content of the blood can be maintained at the normal level even after severe hemorrhage by the injection of 6% NaCl-free gum acacia soln.