Microbiology 9 (specific bacteria)

Question 1

S. intermedius

Answer 1

(from dog bites)

also Coag+ (like S. aureus)

Question 2

“chalky-white” colonies

Answer 2

S. saphrophyticus

Question 3

S. pyogenes characteristics

Answer 3

Beta-hemolytic
Bacitracin sensitive
PYR+

Question 4

S. agalactiae characteristics

Answer 4

B-hemolytic
CAMP+
hippurate+

Question 5

Differentiate G-hemolytic

Answer 5

(enterococcus and S. bovis)
Both Bile esculin +
Enterococcus NaCl tolerant (S. bovis not)
Enterococcus PYR+ (S. bovis not)

Question 6

Viridans strep characteristics

Answer 6

A- or G-hemolytic,
Bile esculin -
optochin resistant

Question 7

Catalase -, vanc resistant, G+ cocci in chains

Answer 7

Pediococcus or Leuconostoc

Question 8

“hockey puck” sign

Answer 8

Moraxella catarrhalis

Question 9

“diphtheroid morphology”

Answer 9

Corynebacteria
Listeria
Propionobacteria

Question 10

Spore-forming G+ rod that is not anaerobic

Answer 10

Bacillus

Question 11

C. perfringens characteristics

Answer 11

double zone hemolysis
Lecithinase +
stormy fermentation of milk
reverse CAMP+

Question 12

C. tetani characteristics

Answer 12

motility

terminal spore

Question 13

One non-motile Bacillus

Answer 13

B. anthracis

Question 14

Listeria characteristics

Answer 14

tubling motility (umbrella)
catalase +
bile esculin +
isolation enhanced at 4C

Question 15

Erysipelothrix characteristics

Answer 15

H2S production on TSI

Question 16

Nocardia characteristics

Answer 16

weak acid fast
paraffin as sole carbon source
“musty-basement” odor
dry, chalky colonies

Question 17

C. diphtheriae characteristics

Answer 17

club-shaped,

metachromatic granules

Question 18

C. jeikeium characteristics

Answer 18

metallic sheen on SBA,
resistant to everything but vancomycin
prosthetic device infxn

Question 19

Brown/black pigment and “brick red” fluorescence

Answer 19

Prophyromonas/Prevotella

Question 20

Shigella characteristics

Answer 20

negative for everything but Methyl Red +

Question 21

Edwardsiella characteristics

Answer 21

iron overload and E. histolytica
Indole +
H2S+

Question 22

Lab characteristic of EHEC O157:H7

Answer 22

unable to ferment sorbitol

Question 23

Klebsiella characteristics

Answer 23

Voges-Prokauer +
no motility
large mucoid colonies
“friedlander bacillus”

Question 24

El Tor biotype of V. cholerae

Answer 24

B-heme
weak string sign
agglutinates chicken RBCs

Question 25

Serotypes causing most cholera

Answer 25

O1 and O139

Question 26

Francisella tularensis characteristics

Answer 26

slow-growing G- coccobacillus

requires cysteine and cystine

Question 27

Brucella characteristics

Answer 27

slow growing Gi coccobacillus
urease +
oxidase +
catalase +

Question 28

malodorous perspiration

Answer 28

Brucellosis

Question 29

Pasturella characteristics

Answer 29

oxidase +
catalase +
indole +

Question 30

Legionella and ____ show the same growth characteristics

Answer 30

Francisella tularensis

Question 31

this test is key to distinguishig C. jejuni from other Campylobacter

Answer 31

hippurate +

Question 32

Capnocytophaga canimorsus characterisics

Answer 32

high CO2 required
gliding motility
finger-like extensions from colonies

Question 33

“puff ball” colonies in broth

Answer 33

Streptobacillus moniloformis

Question 34

Coinfection of Borrelia with ____ and/or ____ is common

Answer 34

Babesia, Flavivirus

Question 35

Borrelia that can be seen in blood film

Answer 35

B. recurrentis (relapsing fever)

Question 36

Triad of sx in leptospirosis

Answer 36

Weil dz

1. meningitis
2. hepatitis
3. nephritis

Question 37

Conjunctival suffusion + scleral icterus

Answer 37

Weil dz (leptosporidia)

Question 38

RMSF fulminant form seen in

Answer 38

G6PD deficiency

Question 39

Chronic Q fever

Answer 39

endocarditis without vegetations

negative blood cultures

Question 40

Bartonella characteristics

Answer 40

pleomorphic G- bacilli

CO2 enriched environment

Question 41

“fried egg” colonies

Answer 41

Mycoplasma pneumoniae