FAMILY VI. BACTEROIDACEAE 



449 



perianal abscess and two strains from puru- 

 lent meningitis in man. 



Habitat: Found in various infections in 

 man. 



14. Sphaerophorus floccosus (Wein- 

 berg et al., 1937) Prevot, 1938. (Strepfobadl- 

 hts pyogenes floccosus Courmont and Cade, 

 Arch. Med. Exp., 12, 1900, 393; Bacillus 

 floccosus Weinberg et al., Les Microbes 

 Ana6robies, 1937, 698; not Bacillus floccosus 

 Kern, Arb. bakt. Inst. Karlsruhe, 1, Heft 4, 

 1896, 424; Bacteroides floccosus Hauduroy 

 et al., Diet. d. Bact. Path., 1937, 55; Prevot, 

 Ann. Inst. Past., 60, 1938, 299.) 



floc.co'sus. L. adj. floccosus full of flocks 

 of wool . 



Small, ellipsoidal rods, 1 micron long, oc- 

 curring singly, in pairs and in chains. Non- 

 motile. Show bipolar staining. Gram-nega- 

 tive. 



Gelatin: No liquefaction. 



Deep agar: Growth slow, appearing as a 

 light haze. No gas produced. 



Blood agar: Translucent colonies sur- 

 rounded by a zone of alpha hemolysis. 



Broth: Rapid, flocculent growth on sides 

 of tube; no turbidity; no gas; slight fetid 

 odor. 



Milk: Poor growth; no coagulation. 



Coagulated serum: Small, whitish colo- 

 nies. No liquefaction. 



Potato: No growth. 



Anaerobic. 



Optimum temperature, 37° C. 



Non-pathogenic for mice. Produces le- 

 sions in rabbits, guinea pigs and dogs. 



Source: Isolated from blood in pyemia of 

 man . 



Habitat: Presumabh' found in various in- 

 fections in man. 



15. Sphaerophoru.s abscedens Tardieu.x 

 and Monteverde, 1951. (Tardieux and 

 Monteverde, in Tardieux, Ann. Inst. Past., 

 80, 1951,276.) 



ab.sce'dens. L. part. adj. abscedens going 

 away, disappearing. 



Pleomorphic rods which, on initial cultur- 

 ing, occur as ellipsoidal forms, 2 to 3 microns 

 in diameter, and as elongated forms with 

 lateral or terminal, spheroidal swellings 

 and metachromatic granules. With subse- 



quent transfers, the short forms predomi- 

 nate, especially in liquid media, and pleo- 

 morphism is retained in agar stabs. The 

 ellipsoidal forms show bipolar staining. 

 Non-motile. Gram-negative. 



Serum or ascitic fluid is required for 

 growth. 



Neither gas nor odor produced. 



Gelatin: No liquefaction. 



Serum agar stab: Colonies punctiform, 

 becoming lenticular. 



Glucose serum broth: Homogeneous tur- 

 bidity. 



In glucose broth, the end-products of fer- 

 mentation are acetic, butyric and lactic 

 acids, ammonia, a slight amount of hydro- 

 gen sulfide, indole and sometimes cresol and 

 acetylmethylcarbinol. Amines, alcohols and 

 ketones are not produced. 



Peptone broth: Eventually becomes tur- 

 bid; indole is produced. 



Milk: Unchanged. 



Coagulated proteins not attacked. 



Glucose and galactose are attacked. 



Nitrites not produced from nitrates. 



Anaerobic. 



Neither toxin nor hemolysin produced. 



Non-pathogenic for rabbits, guinea pigs 

 or mice. 



Source: One strain was isolated from the 

 pus of an abscess on a cow; a second strain 

 was isolated from the pus of an abscess 

 which developed on the heel of a man bitten 

 by a dog. 



Habitat : Found in warm-blooded animals 

 so far as known. 



16. Sphaerophorus caviae (Vinzent, 

 1928) Prevot, 1938. iStreptobacillus caviae 

 Vinzent, Ann. Inst. Past., 42, 1928, 533; 

 Bacteroides caviae Hauduroy et al.. Diet. d. 

 Bact. Path., 1937, 53; Prevot, Ann. Inst. 

 Past., 60, 1938,299.) 



ca'vi.ae. M.L. gen. noun caviae of Cavia; 

 M.L. noun Cavia generic name of the cavy, 

 or guinea pig. 



Small rods, usually 0.3 to 0.5 by 1.0 to 1.5 

 microns, sometimes curved, occurring singly 

 and in chains. Pleomorphic in old cultures 

 with long, filamentous forms. Non-motile. 

 Gram-negative. 



Serum or ascitic fluid is required for 

 growth. 



