FAMILY EXTEROBACTERIACEAE 



509 



5 . . . Serologically identical with Sal- 

 monella typhisuis, and cross-aggluti- 

 nates to a varying degree with a number 

 of other serotypes. 



Habitat and source: Natural host the 

 pig as an important secondary invader 

 in the virus disease, hog cholera. Does 

 not occur as a natural pathogen in other 

 animals, although lethal for mice and 

 rabbits on subcutaneous injection. Oc- 

 casionally gives rise to acute gastro- 

 enteritis and enteric fever in man. 



30a. Salmonella choleraesuis var. Knn- 

 zendorf Schiitze et al. 



The synonyms up to and including 

 Weldin, 1927 for Salmonella choleraesuis 

 apply equally well to the var. Kunzen- 

 dorf, for these were not separated with 

 certainty until 1926 (White, Med. Res. 

 Council, London, Spec. Rep. Ser. 103, 

 27). Re-examined serologically a num- 

 ber of previously described strains agree 

 with this variety. (Paratyphus C Ba- 

 cillus, Heimann, Cent. f. Bakt., I Abt., 

 Orig., 66, 1912, 211; Paratyphosus C, 

 Weil and Saxl, Wien. klin. Wchnschr., 

 30, 1917, 519; Typus-suipestifer Kun- 

 zendorf, Pfeiler, Ztschr. f. Infektskr. d. 

 Haust., 20, 1920, 218; Bacillus para- 

 typhosus B, G. type, Schiitze, Lancet, 1, 

 1920, 93; Bacillus paratyphosus C, Dud- 

 geon and Urquart, Lancet, 2, 1920, 15; 

 included in Group II suipestifer, An- 

 drewes and Xeave, Brit. Jour. Exp. 

 Path., 2, 1921, 157 and Group V of Hecht- 

 Johansen, Copenhagen, 1923; Salmonella 

 suipestifer (European variety) Schiitze. 

 Brit. Jour. Exp. Path., 11, 1930 34; 

 Typus-suipestifer Kunzendorf, Kauff- 

 mann, Zbl. f. d. gen. Hyg., 25, 1931, 273; 

 Salmonella choleraesuis var. kunzen- 

 dorf Schiitze et al., Jour. Hyg., 34, 1934, 

 341; the European Salmonella suipestifer 

 of many authors.) 



Indistinguishable from Salmonella 

 choleraesuis in morphology and cultural 

 characters, except that the Kunzendorf 

 variety forms hydrogen sulfide. 



Antigenic structure: VI, VII: [c]: 1, 5. 

 Differs from Salmonella choleraesuis in 



lacking the specific flagellar phase; 

 serologically identical with Salmonella 

 typhisuis var. voldagsen. 



Source: From pigs with swine fever 

 and once from a monkey in captivity. 



Habitat: Causes acute gastro enteritis 

 and enteric fever in man. Also found 

 in cattle, sheep, carnivora and chickens. 



31. Salmonella typhisuis (Glasser) 

 Schiitze et al. (Bacillus typhisuis Glas- 

 ser, Deutsche tierarztl. Wchnschr., 17, 

 1909, 513; included in the Ferkeltyphus 

 bacilli of German literature, Dammann 

 and Stedefeder, Arch. f. wiss. u. prakt. 

 Tierheilk., 36, 1910, 432; Bacillus 

 glasser Neukirch, Ztschr. f. Hyg., 85, 

 1918, 103; Bacterium typhisuis Holland, 

 Jour, Bact., 5, 1920, 221; included in 

 Group I suipestifer, Andrewes and 

 Neave, Brit. Jour. Exp. Path., 2, 1921, 

 157; Typus-Glasser, Kauffmann, Zbl. 

 f. d. ges. Hyg., 25, 1931, 273; Schutze et 

 al.. Jour. Hyg., 34, 1934, 342.) From 

 Greek, typhus and Latin, pig. 



Rods: 0.6 to 0.7 by 2.0 to 3.0 microns, 

 occurring singly. Motile with four to 

 five peritrichous flagella. Gram -nega- 

 tive. 



Gelatin colonies: Grayish, smooth, 

 flat, glistening, edge entire. No lique- 

 faction. 



Agar colonies: Grayish, moist, smooth, 

 translucent. 



Broth: Turbid. 



Litmus milk: Slightly acid or neutral. 



Indole not formed. 



Nitrites produced from nitrates. 



Forms gas slowly and sparsely from all 

 substances. Growth poor on all or- 

 dinary media. 



Acid from arabinose, xylose and tre- 

 halose. Delayed or variable fermenta- 

 tion from dextrin, maltose, rhamnose, 

 dulcitol, sorbitol. Mannitol not fer- 

 mented or very slowly. Inositol not 

 fermented. 



No HoS produced. 



Optimum temperature 37°C. 



Aerobic, facultative. 



Antigenic structure: Identical with 

 Salmonella choleraesuis, from which the 



