Bacteria Test Results

Question 1

E. coli

Answer 1

Gram: GNB; MACs: lactose fermenter; Indole: positive; Citrate: negative; TSI: pink/black + gas

Question 2

Salmonella pullerum

Answer 2

Gram: GNB; MACs: not lactose fermenter; Indole: negative; Citrate: positive; TSI: pink/ yellow + gas

Question 3

Ent. aerogenes

Answer 3

Gram: GNB; MACs: slight lactose fermenter; Indole: negative; Citrate: positive; TSI: pink/ yellow + gas

Question 4

Ent. cloacae

Answer 4

Gram: GNB; MACs: lactose fermenter; Indole: negative; Citrate: positive; TSI: pink/ yellow + gas

Question 5

Staph aureus

Answer 5

Gram: GPC; TSY: white; MSA: growth/ yellow (mannitol fermenter); Bacitracin: resistant

Question 6

Staph epidermis

Answer 6

Gram: GPC; TSY: white; MSA: no color/ no growth (not a mannitol fermenter); Bacitracin: 50/50 sensitive and resistant

Question 7

Micro luetus

Answer 7

Gram: GPC; TSY: yellow, raised colonies; MSA: no color change/ growth (not a mannitol fermenter); Bacitracin: sensitive

Question 8

B. subtilis

Answer 8

Gram: GPB; Acid fast: NAF; endospore: EF; TSI: K/A

Question 9

M. smegmatis

Answer 9

Gram: GPB; acid fast: AF; endospore: NEF; TSI: K/NC