Phylum Firmicutes, Class Bacilli, Order Lactobacillales, Family Streptococcaceae, Genus Streptococcus, Streptococcus
pseudoporcinus Bekal et al. 2007.
Does not react with Lancefield group A, B, C, D, F, or G antisera.
Gram-positive, spherical to oval cocci, grouped in short chains.
Colonies on blood agar are small and smooth, with entire margins, and hemolytic,
showing a large zone of complete hemolysis. There is slight to normal growth at 10
ºC, but mostly no growth at 45 ºC, in 7 days. Grows in 6.5% NaCl broth in 24 to 48 h.
No extracellular polysaccharide is produced.
Isolated from the female genitourinary tract. Susceptible to vancomycin (30 ug/disk).
Uncertain pathogenicity to other animals or to humans - although was isolated from genitourinary tract of female patients, some with
- Sadjia Bekal, Christiane Gaudreau, Robert A. Laurence, Esther Simoneau, and Lelia Raynal. Streptococcus pseudoporcinus sp.
nov., a Novel Species Isolated from the Genitourinary Tract of Women. J. Clin. Microbiol., 2006, 44, 2584-2586.
Fermentative metabolism. Biochemically very close to S. porcinus.
Positive results for arginine hydrolysis, aesculin hydrolysis, leucine aminopeptidase, acid production from: glucose, glycerol, maltose,
mannitol, ribose, salicin, sorbitol, sucrose & trehalose.
Negative results for catalase, hippurate hydrolysis, starch hydrolysis, urea hydrolysis, acid production from: lactose & melibiose.
Variable results for Voges-Proskauer reaction
(c) Costin Stoica