Gemella is a GPC that rarely colonizes humans and rarely causes human disease. They fall into approximately 11 clusters. Pediococcus forms small, white/buff colonies on blood agar that are non-hemolytic. Staphylococcus in Gram Stain. Streptococcus anginosis is part of the Group C streptococci that can cause human illness. Streptococcus viridans: This is a large group of commensal flora, alpha-hemolytic or non-hemolytic colony-producers, possessing no Lancefield antigens in their cell walls. S. pneumoniae, seen here in typical "lancet-shape" diplococci formation, Streptococcus pyogenes is the causative agent of bacterial pharyngitis, or "Strep Throat". Streptococcus agalactiae can colonize the female urogenital tract, and can cause neonatal meningitis if the baby is infected during the birthing process. Koneman, et al. Holt, J.G., et al. Facultative anaerobic 5% CO2 improves the growth Colonies are small, α-hemolytic or non-hemolytic McConkey growth It often produces an orange or yellow pigment on blood agar. Cooked Meat Medium, Skim Milk Medium, or Brucella with Glycerol. 1997. /Bacterial Database Search, February, 1998. S. pneumoniae: These lance-shaped diplococci are the #1 cause of bacterial pneumonia. Morphology: Spherical, never elongated. https://microbewiki.kenyon.edu/index.php/Pediococcus_pentosaceus Root canal infections, endocarditis, meningitis, and diverticulitis are other infections that may be caused by this organism. , 9th ed. S. pneumoniae is a very mucoid organism with a slime capsule, S. pneumonie forms mucoid, alpha-hemolytic colonies on the blood agar, S. pneumoniae colonies may be flat or raised, but tend to be mucoid and are always alpha-hemolytic (greenish), A susceptibility plate being performed on S. pneumoniae, S. pneumoniae is susceptible to the optochin disk (Taxo P). Anaerobic, Chemoorganotrophic, having a fermentative metabolism and requiring nutritionally rich media. 2. Murray, P.R., et al. Lyophilization is required for long-term preservation. S. pneumoniae in pairs and short chains (yes, it will chain on occasion as well), Enterococcus faecalis and Enterococcus faecium are associated with urinary tract infections, bacteremia, endocarditis, and wound infections. Williams & Wilkins, Baltimore, MD. Tiny alpha-hemolytic colonies of Gemella spp on blood agar. Pediococcus dextrinicus has recently been reassigned to the genus Lactobacillus. Holt, J.G., et al. , Vol. Aerococcus is associated with opportunistic infections, including endocarditis, bacteremia, and urinary tract infections. American Society for Microbiology, Washington, D.C. 5. Streptococcus pyogenes, Group A Strep, beta-hemolytic, raised, buff/cream-colored colonies on blood agar, Streptococcus agalactiae, Group B Strep, beta-hemolytic, small, raised, buff-to-slightly golden colonies on blood agar, Streptococcus dysgalactiae, flat, mucoid, gray, beta-hemolytic colonies, Streptococcus equi, large, cream-colored, raised, mucoid colonies with huge zones of beta hemolysis, Streptococcus equinus, large, mucoid, beta-hemolytic colonies, Streptococcus anginosus, tiny, pinpoint, translucent colonies on blood agar, Streptococcus bovis, alpha-hemolytic colonies on blood agar, Streptococcus canis, medium, raised, tan colonies with huge zones of beta-hemolysis, Streptococcus sanguinis, small, raised, alpha-hemolytic colonies, Streptococcus suis, small, mucoid, alpha-hemolytic colonies representative of "Viridans streptococci", Small, raised, alpha-hemolytic colonies on blood agar representative of S. mitis, Streptococcus mutans, raised, large, mucoid, alpha-hemolytic colonies on blood agar, Streptococcus pneumoniae, raised or flat, small, mucoid, alpha-hemolytic colonies. Pediococcus is associated with opportunistic infections and bacteremia. Pediococcus is a genus of gram-positive lactic acid bacteria, placed within the family of Lactobacillaceae.They usually occur in pairs or tetrads, and divide along two planes of symmetry, as do the other lactic acid cocci genera Aerococcus and Tetragenococcus.They are purely homofermentative. Unipath Ltd., Basingstoke, UK. Skin of umbilicus and genital area, occasionally present in clinical specimens.
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