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animal stocks anorexia antibiotics antipneumococcus sera Axenic Biol Biological breed cages Cats MandF cavies Chicago Chick embryos chickens coccidiosis colony contaminated CONTROL—Control CONTROL—The Cotton Rats cycle Dept DERMATOMYCOSES Determination of potency diarrhea Director of Research disease caused dogs and cats dyspnea eggs embryos feed flea frogs genetic Gonadotropic guinea pigs Hampshire Reds hamsters HYMENOLEPIS Illinois Dr infected animals infectious disease intermediate hosts Jour laboratory animals larvae lesions louse maintained mammary tumor Mice mite monkeys MorF mouse Newcastle disease numbers nutrition P. O. Box parasites pigeons pneumonia Potency tests protein Pullorum clean pyrethrins rabbits Research Rats rid the animal rodents rotenone RRrtL SALMONELLOSIS septicemia Serum SEX WEIGHT skin small numbers stock diets strains Street Sulfanilamide symptoms therapeutic—1 tick tion toxins Toxocara cati tumor University vaccine Veterinary virus and characterized Vitamin WEIGHT AGE White Leghorns