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158 restricted to the old. the weak, or those with concurrent disease. Pigeons are the most common and consistent source of all known hosts (Terskiph 1961). Over half of the pigeon population is or has been infected. Q fever is caused by Coxiella burnetti. It is characterized by a sudden onset of pneumonitis, sometimes causing death. Pigeons are involved as carriers (Syrcuek et al. 1956). Investigators have isolated C. bumetti from the Kidneys of a large number of pigeons. The disease can be transmitted by infected ticks, ingestion, or by inhalation of dust contaminated with the organism. PARASITIC WORMS include cestodes and trematodes. Taeniasis by large tapeworm is caused by Taenia saginata, with specimens up to 50 feet having been recovered. Pigeons have been incriminated as potential vectors. Schistosomiasis, one of the most prevalent diseases throughout the world, is caused by a water -borne trematode. Pigeons are associated with flukes in the watery areas where they exist. Other pigeon - associated trematodes include Echinoparyphium paraulum, Echinoparyphium recur- vatum, Echinostoma revolutum, Haplorchis pulimio, and Hypoderaeum conoideum. DERMATOSIS. Acariasis is caused by infection of mites. Bird mites were responsible for a case of pruritis in a North Carolina hospital. The mites originated in a pigeon nest in the ventilator. Literature Cited Fothergill, LeRoy D., John H. Dingle, Sidney Farber, and M.L. Connerley. 1938. Human ecephalitis caused by the virus of the Eastern variety of equine encephalomyelitis. New England J. Med. 219: 411. Hubbert, W.T. 1972 Yersiniosis in mammals and birds in the United States. Am.J. Trop. Med. & Hyg. 21: 458-463. Muller, G. 1965. Salmonella in bird faeces. Nature 207 (5003): 1315. Newberry, Marcus W., Jr., Jinks E. Walter, John W. Chandler, Jr., and Fred E. Tosh. 1967. Epidemiological study of Cryptococcus neoformans. Ann. Int. Med. 67: 724-732. Syrucek, L. and Raska. 1956. Q fever in domestic and wild birds. Bull. World Health Organziation. 15(1/2): 329-337. Terskikh, I. I., A M. Chel'tsov-Bebutov, L. N. Kuborina, and A. A. Keleinikov. 1961. Study on ornithosis in birds and its natural focal occurrence. Vopr. Virusol (transl.) 6(2): 141-146. Weber, W. 1979. Health hazards from pigeons, starlings and English sparrows. Thom- son Publications, Fresno, California. 137 pp.