THERE exist only isolated reports concerned with actual observations on the number of cells or amount of hemoglobin in the blood of chickens affected with animal parasites. Some textbooks speak of a state of anemia as being associated with severe infections of the chicken with tapeworms or round worms (Reinhardt, 1925). Yakimoff and Rastégaieff (1929) observed one chicken with Eimeria tenella and cestode infection to have a very marked eosinophilia which amounted to 48.6 percent of the total number of leukocytes. Fantham (1912) reports that in the blood of a young chicken affected with coccidiosis the differential count was: lymphocytes 20.5 percent, heterophils 47.0 percent, eosinophils 2.0 percent, basophils 1.0 percent, and monocytes 29.5 percent. Fantham (1912) also reports that grouse infected with Trichostrongylos pergracilis showed a moderate anemia and marked relative eosinophilia. Allen and Gross (1926) found that a captive ruffed grouse severely infected with Thominx annulata had a .
Read full abstract