GROSS COLONY CHARACTERISTICS

Question 1

smooth, glistening, and CLAY-LIKE

Answer 1

Neisseria elongata

Question 2

BUTTERY, CREAMY YELLOW; BUTYROUS, medium-sized

Answer 2

Staphylococcus aureus

Question 3

brittle, crumbly, wrinkled

Answer 3

Nocardia

Question 4

FRIED EGG on BAP

Answer 4

Mycoplasma

Question 5

shiny half pears on BAP;
colonies appearing like MERCURY DROPLETS

Answer 5

Bordetella pertussis

Question 6

GREENISH METALLIC SHEEN ON BAP ❗❗❗

Answer 6

Pseudomonas aeruginosa

Question 7

GREENISH METALLIC SHEEN ON EMB ✅

Answer 7

Escherichia coli

Question 8

serrated confluent growth on CETRIMIDE

Answer 8

P. aeruginosa

Question 9

SWARMING on SBA/CHOC; GRAM NEGATIVE

Answer 9

Proteus

Question 10

SWARMING ON SBA/CHOC; GRAM POSITIVE

Answer 10

1. Clostridium tetani
2. Clostridium septicum

Question 11

young colonies are DOME-SHAPED

Answer 11

Streptococcus pneumoniae

Question 12

aged colonies appear like a “COIN WITH A RAISED RIM” or FLAT WITH PENNY EDGE

Answer 12

Streptococcus pneumoniae

Question 13

aged colonies are crater-like, nail head appearing, colonies with CHECKER APPEARANCE, umbilicated

Answer 13

S. pneumoniae

Question 14

semi-opaque colonies; “BULL’S EYE appearing, GRAM POSITIVE

Answer 14

Streptococcus agalactiae

Question 15

HOCKEY PUCK COLONIES

Answer 15

Moraxella catarrhalis

Question 16

colonies remain intact when pushed across the plate using inoculating loop

Answer 16

Moraxella catarrhalis

Question 17

colonies with WAGON WHEEL APPEARANCE

Answer 17

M. catarrhalis

Question 18

tenacious colonies with BEATEN EGG WHITE CONSISTENCY

Answer 18

Bacillus anthracis

Question 19

colonies with “SWIRLING PROJECTIONS”, appearing like MEDUSA HEAD, LION HEAD; colonies with COMET TAIL APPEARANCE

Answer 19

Bacillus anthracis

Question 20

gray to black on CTBA; BLACK COLONIES with BROWN HALO on TINSDALE

Answer 20

Corynebacterium diphtheriae

Question 21

SALMON PINK PIGMENTATION on BAP

Answer 21

Rhodococcus equi

Question 22

CAULIFLOWER-LIKE growth

Answer 22

M. tuberculosis

Question 23

BIRD’S NEST APPEARING colonies on CORN MEAL AGAR

Answer 23

Mycobacterium xenopi

Question 24

WATER DROPLET appearing colonies

Answer 24

Mycobacterium bovis

Question 25

BULL’S EYE appearing colonies on CIN; OXIDASE NEGATIVE

Answer 25

Yersinia enterocolitica

Question 26

BULL’S EYE APPEARING colonies on CIN; OXIDASE POSITIVE

Answer 26

Aeromonas

Question 27

HAMMERED COPPER colonies on BAP

Answer 27

Yersinia pestis

Question 28

NON-FERMENTER - WRINKLED COLONIES

Answer 28

Pseudomonas stutzeri

Question 29

NON-FERMENTER - WRINKLED COLONIES with EARTHY ODOR

Answer 29

Burkholderia pseudomallei

Question 30

shows SATELLITISM; luxuriant growth near the source of the incorporated V factor

Answer 30

Haemophilus influenzae