Gram Positive Cocci

Question 1

Answer 1

Aerococcus viridans - normal oral flora
GS: GPC tetrads and pairs
Alpha hemolysis, Catalase negative, Bacitracin Resistant, Optochin Resistant, PYR positive, Bile negative, 6.5% NaCl growth
Associated with UTIs

Question 2

Answer 2

Candida albicans
GS: GP budding yeast or GP yeast
UTIs

Question 3

Answer 3

Enterococcus faecalis
GS: GPC-chains elongated ovals
Catalase negative or weak positive, PYR positive, Bile positive, 6.5% NaCl positive
Bacteremia, Endocarditits, Intra-abdominal infections, wound and soft tissue infections
VRE potential

Question 4

Answer 4

Enterococcus faecium
GS: GPC-chains elongated ovals
Catalase negative, PYR positive, Bile positive, 6.5% NaCl positive
VRE potential

Question 5

Answer 5

Micrococcus luteus - normal skin flora
GS: GPC tetrads
Yellow, Catalase positive, Coagulase negative, Bacitracin S, Furazolidone Resistant, Lysostaphin Resistant
Immunocompromised

Question 6

Answer 6

Micrococcus species
GPC: GPC tetrads
Catalase positive, Coagulase negative, Microdase positive

Question 7

Answer 7

Staphylococcus aureus - normal flora of mucus membranes
GS: GPC clusters
Beta hemolysis, Catalase positive, Coagulase positive, Bacitracin Resistant, Furazolidone Sensitive, Lysostaphi Sensitive, Ferments Mannitol salt
Wound infections, bacteremia, pneumoniae, meningitis, food poisoning

Question 8

Answer 8

Staphylococcus epidermidis - normal skin flora
GS: GPC clusters
Catalase positive, Coagulase negative, Novobiocin Sensitive, Polymyxin B Resistant

Question 9

Answer 9

Staphylococcus saprophyticus - normal flora
GS: GPC clusters
Catalase positive, Coagulase negative, Novobiocin Resistant
UTIs in young adult females that are sexually active

Question 10

Answer 10

Staphylococcus simulans - mostly animal flora
GS: GPC clusters
Catalase positive, Coagulase negative, Novobiocin Sensitive, Perform panel or MALDI to ID
Isolated from septic arthritis

Question 11

Answer 11

Streptococcus agalatiae (Group B latex)
GS: GPC-chains
Beta hemolysis, Catalase negative, Bacitracin - No Zone, PYR negative, CAMP test positive
Neonatal meningitis, Skin and wound infections, Bacteremia, Pneumoniae, Endocarditis, Osteomyolitis

Question 12

Answer 12

Streptococcus anginosus (Viridans Group)
GS: GPC-chains
Gamma hemolysis, Catalase negative, Bacitracin Resistant, Optochin Resistant, PYR negative, Bile negative, 6.5% NaCl negative
Infection of GI, head, and neck

Question 13

Answer 13

Streptococcus bovis (Group D latex)
GS: GPC-chains
Gamma hemolysis, Catalase negative, Bacitracin Resistant, PYR negative, Bile positive, 6.5% NaCl negative
Septecemia, Bacteremia

Question 14

Answer 14

Streptococcus dysgalactiae (Group C latex)
GS: GPC-chains
Beta hemolysis, Catalase negative, Bacitracin No Zone
Bacteremia, Skin infections

Question 15

Answer 15

Streptococcus mitis (Viridans)
GS: GPC-chains
Alpha hemolysis, Catalase negative, Bacitracin Resistant, Optochin Resistant, PYR negative, Bile negative, 6.5% NaCl negative
Endocarditis, meningitis

Question 16

Answer 16

Streptococcus mutans - normal upper respiratory & dental flora
GS: GPC-chains
Alpha hemolysis, Catalase negative, Bacitracin Resistant, Optochin Resistant, PYR negative, Bile negative, 6.5% NaCl negative

Question 17

Answer 17

Streptococcus pneumoniae
GS: GPDC-lancets (Gram Positive DiploCocci)
Alpha hemolysis, Catalase negative, Bacitracin Resistant, Optochin Sensitive, Bile positive, Deoxycholate positive, PYR negative, 6.5% NaCl negative
Bacteremia, meningitis, otitis media, sinusitis, bronchitis, septic arthritis, pneumonia

Question 18

Answer 18

Streptococcus pneumoniae - sometimes mucoid

Question 19

Answer 19

Streptococcus pyogenes (Group A latex)
GS: GPC-chains
Beta hemolysis, Catalase negative, Bacitracin Zone of 12 mm, PYR positive
Strep throat, Skin and wound infections, bacteremia, and pneumonia

Question 20

Answer 20

CAMP test positive result