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ORDER I. RICKETTSIALES 



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.) 



