FAMILY II. TREPOXEMATACEAE 



903 



Pathogenicity: Pathogenic for white mice 

 but not for guinea pigs. 



Source: Isohited from Or nithodoros dugesi 

 in Mexico. 



21. Borrelia graingeri (Heisch, 1953) 

 Davis, comb. nov. (Spirochaeta graingeri 

 Heisch, Parasitology, 43, 1953, 133.) 



grain'ger.i. M.L. gen. noun graingeri the 

 specific epithet of the tick vector of this spe- 

 cies, Ornithodoros graingeri. 



Transmitted by Ornithodoros graingeri. 



Pathogenicity: White rats and mice are 

 mildly susceptible. Guinea pigs, a monkey 

 {Cercopithecus aelhiops) and a young rabbit 

 were not susceptible. Causes a persistent 

 parasitemia in cases of general paralysis 

 of man. 



Source: Isolated from Ornithodoros grain- 

 geri from caves near Tiwi, about 20 miles 

 south of Mombasa, Kenya. 



22. Borrelia babylonensis (Brumpt, 

 1939) Davis, comb. nov. {Spirochaeta babylo- 

 nensis Brumpt, Compt. rend. Acad. Sci., 

 Paris, 208, 1939, 2030.) 



ba.by.lo.nen'sis. L. adj. babylonensis 

 pertaining to Babylon. 



Transmitted by Ornithodoros tholozani 

 var. babylonensis. 



Pathogenic for guinea pigs. 



Comments: Originally reported as iso- 

 lated from Ornithodoros asperus. Later it 

 was found that the ticks were not O. asperus 

 but 0. tholozani. However, as this spirochete 

 was transmitted only by 0. tholozani col- 

 lected near Babylon and not by 0. tholozani 

 from other areas, the spirochete was ac- 

 corded specific rank and the tick was given 

 a varietal status, 0. tholozani var. babylonen- 

 sis. (See Brumpt, Precis de Parasitol., 1, 

 1949, 101.) 



Source: Isolated from Ornithodoros tholo- 

 zani var. babylonensis from a rodent burrow- 

 in the ruins of Kish near Babylon. 



23. Borrelia crocidurae (Leger, 1917) 

 Davis, comb. nov. {Spirochaeta crocidurae 

 Leger, Bull. Soc. Path. Exot., 10, 1917, 280.) 



cro.ci.du'rae. M.L. gen. noun crocidurae 

 of Crocidura; M.L. fem.n. Crocidura a genus 

 of rodents. 



Transmitted by Ornithodoros erraticus 

 (small form). 



Pathogenicity: Pathogenic for white mice 

 but not for guinea pigs. 



Source: Isolated from the shrew-mouse, 

 Crocidura stampflii, in Senegal. 



24. Borrelia dipodilli (Heisch, 1950) 

 Davis, comb. nov. {Spirochaeta dipodilli 

 Heisch, Ann. Trop. Med. and Parasit., 44, 

 1950, 260.) 



di.po.dil'li. M.L. gen. noun dipodilli of 

 Dipodillus; M.L. mas.n. Dipodillus a genus 

 of rodents. 



Transmitted by Ornithodoros erraticus 

 (small form). 



There is no cross immunity against Bor- 

 relia duttonii, B. harveyi, B. turicatae or B. 

 crocidurae. 



Pathogenicity: Pathogenic for rats, mice, 

 monkeys and young rabbits but not for 

 guinea pigs; man is mildly susceptible. 



Source: Isolated from the pigmy gerbille 

 {Dipodillus sp.) from Crescent Island on the 

 east shore of Lake Naivasha, Kenya. 



25. Borrelia latyschewii (Soviev, 1941) 

 Davis, 1948. {Spirochaeta laiyschewi (sic) 

 Soviev, Parasitic Diseases (U.S.S.R.), 10, 

 1941, 267; Davis, Ann. Rev. Microbiology, 

 2, 1948, 315.) 



la.ty.sche'wi.i. M.L. gen. noun laty- 

 schewii of Latyschew; named for Latyschew. 



Transmitted by Ornithodoros tartakovskyi. 



Pathogenicity: Pathogenic for white mice 

 and rabbits but not for white rats, guinea 

 pigs or dogs. 



Source: Isolated from the gerbilles Rhom- 

 bornbys opimus and Gerbillus eversmanni 

 in Fergana, Usbekistan; also found in Iran. 



26. Borrelia hyos (King and Drake, 1915) 

 Bergey et al., 1925. (Hog cholera virus, King 

 and Baeslack, Jour. Inf. Dis., 12, 1913, 39; 

 Spirochaeta suis King, Baeslack and Hoff- 

 mann, Jour. Inf. Dis., 12, 1913, 235; not 

 Spirochaeta suis Bosanquet, Spirochetes, 

 Saunders, 1911; Spirochaeta hyos King and 

 Drake, Jour. Inf. Dis., 16, 1915, 54; Bergey 

 et al.. Manual, 2nd ed., 1925, 436.) 



hy'os. L. noun hys, hyos the hog. 



Cells 1 by 5 to 7 microns. Distinctly 

 shorter and thicker than the other mem- 

 bers of the genus. Motile with an active, 

 spinning motion, the spirals being fixed. 



