Characteristics in Culture media

Question 1

Ammonia (in BAP)

Answer 1

Stenotrophomonas maltophilia

Question 2

Dirt / Putrid / Earth

Answer 2

Burkholderia species

Question 3

Burnt Chocolate/ Burnt Gunpowder

Answer 3

Proteus spp.

Question 4

Strawberry/Apple/Sweet

Answer 4

Alcaligenes faecalis

Question 5

Rotten potato

Answer 5

Serratia odorifera

Question 6

Grape/Tortilla/taco

Answer 6

Pseudomonas aeruginosa

Question 7

Almond/Ammonium cyanide

Answer 7

Chromobacterium violaceum

Question 8

Mousy, mouse nest

Answer 8

Haemophilus

Question 9

Mushroom

Answer 9

Pasteurella multocida

Question 10

Musty basement

Answer 10

Streptomyces

Question 11

Freshly plowed field

Answer 11

Nocardia

Question 12

Old socks/Stocking

Answer 12

Staphylococcus aureus

Question 13

Cheese

Answer 13

Brevibacterium

Question 14

Butterscotch

Answer 14

Viridans in Chocolate agar

Question 15

Sauerkraut

Answer 15

Ignavigranum ruoffiae

Question 16

Positive for Swarming

Answer 16

Proteus species, Clostridium tetani, Clostridium septicum, Clostridium sporogenes, Capnocytophaga spp.

Question 17

Large Pink Mucoid Colonies in MAC

Answer 17

Klebsiella spp.

Question 18

Red colonies in media

Answer 18

Serratia marcescens (prodigiosin)

Question 19

Hockey pock / Wagon wheel colonies

Answer 19

Moraxella catarrhalis

Question 20

Bull’s eye colonies

Answer 20

Aeromonas, Yersinia enterocolitica in CIN

Question 21

Buff/Yellow Wrinkled colonies

Answer 21

Pseudomonas stutzeri

Question 22

Star-like colonies

Answer 22

Aggregatibacter actinomycetemcomitans

Question 23

Fried egg colonies

Answer 23

Mycoplasma hominis

Question 24

Molar tooth colonies

Answer 24

Actinomyces israelii, Actinomadura spp.

Question 25

Breadcrumb colonies

Answer 25

Fusobacterium nucleatum

Question 26

Gray translucent pinpoint or Umbilicate

Answer 26

Streptococcus pneumoniae

Question 27

Umbonate colonies

Answer 27

Viridans and Eikenella

Question 28

Mercury droplets or Pearl-like

Answer 28

Bordetella on Bordet Gengou

Question 29

Large moist blister colony with amoeboid spreading

Answer 29

Paenibacillus polymyxa

Question 30

Beaded appearance

Answer 30

Nocardia

Question 31

Cauliflower appearance

Answer 31

Yersinia pestis in BAP, Mycobacterium tuberculosis in L.J.

Question 32

Stalactite pattern

Answer 32

Yersinia pestis in broth

Question 33

Green metallic sheen

Answer 33

E. coli on EMB

Question 34

Fisheye appearance of colony

Answer 34

Enterobacter on EMB

Question 35

Double zone of hemolysis

Answer 35

Clostridium perfringens

Question 36

Creamy white/ Colony with feet extensions

Answer 36

Yeasts

Question 37

Blue-green powdery colonies

Answer 37

Aspergillus fumigatus

Question 38

Black powdery colonies

Answer 38

Aspergillus niger

Question 39

Cobweb fluffy (white scattered hyphae)

Answer 39

Coccidioides

Question 40

Medium-large pinhead smooth convex opaque creamy yellow, β-hemolytic on BAP

Answer 40

S. aureus

Question 41

MSA Medium-large pinhead smooth convex Yellow colonies with halo

Answer 41

S. aureus

Question 42

Grayish-white, small, translucent, smooth with well-defined β-hemolysis on BAP

Answer 42

S. pyogenes

Question 43

Glossy grayish white and mucoid with small zone of β-hemolysis on BAP

Answer 43

S. agalactiae

Question 44

Alpha-hemolytic, mucoidal, umbilicate colonies on BAP

Answer 44

S. pneumoniae

Question 45

Gray Flat Nonhemolytic comet-tail/Medusa-head or ground glass colonies on BAP

Answer 45

B. anthracis

Question 46

Large, feathery, spreading Beta hemolytic on BAP

Answer 46

B. cereus

Question 47

Brown-Black colonies with gray-brown halo on Tinsdale agar

Answer 47

Corynebacterium diphtheriae

Question 48

Mucoid orange to red or Salmon-pink non-hemolytic colonies on BAP

Answer 48

Rhodococcus equi

Question 49

Medium to large, smooth opaque, iridescent with greenish hue on BAP

Answer 49

Vibrio spp.

Question 50

Round, Smooth, Convex appear black or dark purple on BAP

Answer 50

Chromobacterium violaceum

Question 51

Comet-like in semisolid media

Answer 51

Haemophilus aegypticus

Question 52

Iridescence pigments of yellow, red, green, blue on Levinthal medium

Answer 52

H. influenzae

Question 53

Dry, Violet-purple, Wrinkled colony on Ashdown agar

Answer 53

B. pseudomallei

Question 54

Spreading, flat, serrated edges with metallic sheen (with bluish-green, or red, or brown pigment) on BAP

Answer 54

P. aeruginosa

Question 55

Glistening Ground glass colonies with pink, blue-green (rainbow appearance) BCYE

Answer 55

L. pneumophila

Question 56

Yellow ground glass appearance - CCFA

Answer 56

C. difficile

Question 57

Flat, non-hemolytic colonies that has chartreuse fluorescence under UV light on BAP

Answer 57

C. difficile

Question 58

Mother-of-pearl or gasoline-on-water appearance on Lipase activity on Egg yolk agar (EYA)

Answer 58

C. botulinum