Usually coccoid cells, but pleomorphism is marked. Gram-negative. Occur intracyto- plasmically as scattered growth. Cause ophthalmic diseases of warm-blooded animals. The type species is Ricolesia pullorum (Zhdanov and Korenblit) Rake. Key to the species of genus Ricolesia. I. Affects fowls, causing a form of ocular roup. 1. Ricolesia conjunctivae. II. Do not affect fowls. A. Affect ruminants, causing infectious conjunctivitis. 1. Affects cattle. 2. Ricolesia bovis. 2. Affects goats. 3. Ricolesia caprae. B. Does not affect ruminants; affects swine, causing infectious conjunctivitis. 4. Ricolesia lestoguardii. 1. Ricolesia conjunctivae (Coles, 1940) Rake, comb. nov. (Rickettsia conjunctivae gain Coles, Onderstepoort Jour. Vet. Sci. and Anim. Ind., 14, 1940, 474; Colesiota conjunctivae-gallii Rake, in Manual, 6th ed., 1948, 1120; Chlamydozoon conjunctivae gain Krassilnikov, Guide to the Bacteria and Actinomycetes, Izd. Akad. Nauk, U.S.S.R., Moskau, 1949, 735; Chlamydo- zoon pullorum Zhdanov and Korenblit, Jour. Microbiol., Epidemiol, and Immuno- biol. (Russian), No. 9, 1950, 43.) con. June. ti'vae. L.adj. conjunctivus con- nective; M.L. fem.n. conjunctiva the con- junctiva; M.L. gen. noun conjunctivae of the conjunctiva. Pleomorphic. There are many coccoid cells, measuring 200 millimicrons to 2 mi- crons in diameter. Other cells are bacillary, triangular, annular or horse-shoe in form. Most stain uniformly. Purplish red or blue with Giemsa's stain. Gram-negative. Cultivation: Has not been cultivated. Immunology: Unknown. Pathogenic for the domestic fowl. Causes an acute conjunctivitis and keratitis. Tissue tropism: Affects only the conjunc- tiva and the cornea. Habitat: The etiological agent of one form of ocular roup in fowls. 2. Ricolesia bovis Rake, comb. nov. (Ric- kettsia conjunctivae bovis Coles, South Afr. Vet. Med. Assoc, 7, 1936, 223; Chlamydo- zoon conjunctivae-bovis Moshkovskiy, Uspekhi Souremennoi Biologii, 19, 1945, 19.) bo'vis. L. noun bos a cow; L. gen. noun bovis of a cow. Pleomorphic. Resembles Ricolesia con- junctivae morphologically and in staining reactions. Cultivation: Has not been cultivated. Immunology: Unknown. Pathogenic for cattle. Causes an acute conjunctivitis and keratitis. Tissue tropism: Affects only the conjunc- tiva and the cornea. Habitat: The etiological agent of infec- tious kerato-conjunctivitis in cattle. 3. Ricolesia caprae Rake, comb. nov. (Rickettsia conjunctivae caprae Coles, Ann. New York Acad. Sci., 56, 1953, 460.) ca'prae. L. noun capra a she-goat; L. gen. noun caprae of a she-goat. Pleomorphic. Resembles Ricolesia con- junctivae. Cultivation: Has not been cultivated. Immunology: Unknown. Pathogenic for goats. Causes acute con- junctivitis and keratitis. Tissue tropism: Affects only the conjunc- tiva and the cornea. Habitat: The etiological agent of infec- tious kerato-conjunctivitis in goats. 4. Ricolesia lestoquardii (Donatien and Gayot, 1942) Rake, comb. nov. (Rickett- sia lestoquardi (sic) Donatien and Gayot, Bull. Soc. path, exot., 35, 1942, 325; Chlamy- dozoon lestoquardi (sic) Krassilnikov, Guide to the Bacteria and Actinomycetes, Izd. Akad. Nauk, U.S.S.R., Moskau, 1949, 735; Rickettsia conjunctivae suis Coles, Ann. New York Acad. Sci., 56, 1953, 460.)
