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22 Cards in this Set
- Front
- Back
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Staphylococcus aureus
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• Gram-positive cocci in clusters
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Staphylococcus aureus
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Morphology: medium to large, smooth, entire, slightly raised, translucent, most colonies pigmented creamy yellow, most colonies beta-hemolytic
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Staphylococcus epidermidis
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• Gram-positive
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Staphylococcus epidermidis
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Morphology: small to medium, translucent, gray-white colonies, most colonies nonhemolytic, slime-producing strains are extremely sticky and adhere to the agar surface
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Staphylococcus saprophyticus
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Morphology: variable hemoloysis +/-; large, entire, very glossy, smooth, opaque, butyrous, convex, usually white but colonies can be yellow or orange
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Micrococcus spp.
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Gram-positive
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Micrococcus spp.
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Morphology: small to medium, opaque, convex, nonhemolytic, wide variety of pigments (white, tan, yellow, orange, pink
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Streptococcus pyogenes (Group A)
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Gram-positive cocci in chains and pairs
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Streptococcus pyogenes
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Morphology: grayish white, transparent to translucent, matte or glossy, large zone of beta hemolysis
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Streptococcus agalactiae (Group B)
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Morphology: larger than Group A streptococci, translucent to opaque, flat, glossy, narrow zone of beta hemolysis, some strains non-hemolytic
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Streptococcus pneumoniae
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Gram-positive cocci
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Streptococcus pneumoniae
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Morphology: small, gray, glisteining, colonies tend to dip down in the center and resemble a doughnut (umbilicated) as they age, if organism has a polysaccharide capsule, colony may be mucoid, alpha-hemolytic
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Enterococcus spp.
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• Morphology: small, cream or white, smooth, entire, alpha, beta, or non-hemolytic
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Enterococcus spp.
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GPC
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Neisseria meningitidis
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Small, gram-negative diplococci
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Neisseria meningitidis
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Morphology: medium, smooth round, moist, gray to white, encapsulated strains are mucoid, may be greenish cast in agar underneath colonies
Better growth on Chocolate |
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Neisseria gonorrhoeae
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Small, bean-shaped, gram-negative diplococci
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Neisseria gonorrhoeae
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Morphology: small, grayish white, convex, translucent, shiny colonies with either smooth or irregular margins. Better growth on Chocolate.
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Neisseria lactamica
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Gram-negative diplococci. Morphology: small, nonpigmented or yellowish, smooth, transparent
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Moraxella catarrhalis
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Morphology: large, nonpigmented or gray, opaque, smooth, friable "hockey puck" consistency, colony may be moved intact over surface of agar.
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Moraxella catarrhalis
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Gram-negative diplococci
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Haemophilus influenzae
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Gram-negative coccobacilli or small rods
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