976 



ORDER I. RICKETTSIALES 



rings. Beads and rings may arise from 

 slender, deeply staining rods, simulating 

 very closely spores within bacilli, though no 

 germination of filaments from them has been 

 observed. 



Slightly pathogenic for the gray squirrel; 

 non-pathogenic for normal white mice. 



Habitat: Found in the blood of gray 

 squirrels (Sciurus carolinensis leucotis). 



6. Haemobartonella bovis (Donatien 

 and Lestoquard, 1934) Weinman, 1944. 

 {Bartonella bovis Donatien and Lestoquard, 

 Bull. Soc. path, exot., ^7, 1934, 652; Bar- 

 tonella sergenti Adler and EUenbogen, Jour. 

 Comp. Path, and Therap., 47, 1934, 221; 

 (?) Bartonella bovis Rodriguez, Rev. del 

 Inst. Llorente, 13, 1935, 5; abst. in Bull. 

 Inst. Past., 34, 1936, 1033; Haemobartonella 

 sergenti Weinman, Trans. Amer. Philosoph. 

 Soc, 33 (N.S.), 1944, 290; Weinman, ibid., 

 308.) 



bo'vis. L. noun bos the ox; L. gen. noun 

 bovis of the ox. 



Rods, coccobacilli and cocci, occur singly, 

 in pairs or in short chains or groups of 10 

 or more elements. The rods measure 1.2 to 

 2.0 microns in length and are very slender. 

 The coccobacilli occur singly or in pairs 

 measuring 0.3 by 0.6 to 0.8 micron, and the 

 diameters of the cocci are about 0.3 micron. 

 May occupy a central or marginal position 

 on the red blood cell, the number on a cell 

 varying from 1 to 20. Not more than 20 per 

 cent of the red blood cells are parasitized. 

 Using the Romanowsky stain, the organisms 

 stain similarly to the chromatin of Piro- 

 plasma spp. 



Source and habitat: Recovered from the 

 blood of bulls in Algeria and from a non- 

 splenectomized calf in Palestine. 



7. Haemobartonella sturinanii (Grin- 

 berg, 1939) Weinman, 1944. (Bartonella 

 sturmani (sic) Grinberg, Ann. Trop. Med. 

 and Parasitol., 33, 1939, 33; Weinman, 

 Trans. Amer. Philosoph. Soc, 33 (N.S.), 

 1944, 313.) 



stur.ma'ni.i. M.L. gen. noun sturinanii of 

 Sturman; named for Dr. M. Sturman. 



Similar to Haemobartonella bovis and to 

 H. canis morphologically and in staining 

 properties. Occurs as rods and as cocco- 

 bacillary and coccoid forms, varying in 



length from 0.5 to 1.5 microns. The number 

 of organisms per infected red blood cell 

 varies from 1 to 15; they occur individually, 

 scattered irregularly in clumps or sometimes 

 in chains stretching across the cell. At the 

 height of the infection, more than 90 per 

 cent of the cells are infected. 



Pathogenicity: Causes a temperature rise 

 in buffaloes and slight anemia after direct 

 blood inoculation. Splenectomized rabbits, 

 hamsters and calves inoculated with blood 

 from infected buffaloes remained free of 

 the organism. 



Source and habitat: From the blood 

 of buffaloes in Palestine. 



8. Haemobartonella canis (Kikuth, 

 1928) Tyzzer and Weinman, 1939. (Bar- 

 tonella canis Kikuth, Klin. Wochnschr., 7^, 

 1928, 1729; Tyzzer and Weinman, Amer. 

 Jour. Hyg., 30 (B), 1939, 151.) 



ca'nis. L. noun canis the dog. 



One of the most polymorphic of the 

 haemobartonellae, occurring as thin rods, 

 straight or slightly curved, dumbbell- 

 shaped organisms, dots, coccoids or rings. 

 Chains of rods, of coccoids or of rings also 

 occur; these consist of only one type of these 

 forms or a mixture of types. The chains may 

 be straight, curved, branched or annular. 

 Variable in size. Round forms vary from 

 0.2 or 0.5 micron to the limit of visibility. 

 Single rods measure 0.2 by 1.0 to 5.0 microns, 

 while the composite forms vary from 1.0 

 to 4.0 microns or more. Considered to be 

 non-motile by most investigators. With 

 Giemsa's stain, the organisms are red- 

 violet, usually intensely so. Methylene blue 

 used as a vital stain colors the organisms 

 distinctly. Not acid-fast. Gram-negative. 



Cultivation has not been demonstrated in 

 semi-solid rabbit-serum agar medium, in 

 media containing serum of splenectomized 

 dogs, in N. N. N., in Noguchi's medium for 

 leptospires, in blood broth nor in Chatton's 

 medium covered with vaseline for Tricho- 

 mastix. 



Filterability: Results are equivocal. 



Immunology: The outstanding phenom- 

 ena resemble those found in the rat infected 

 with Haemobartonella vniris. 



Pathogenicity: Anemia follows splenec- 

 tomy in infected dogs, otherwise infection 

 usually remains asymptomatic. Negative 



