HACEK

Question 1

Colonizes the________;_______ pathogens

Answer 1

oropharynx

opportunistic

Question 2

• Slow-growing (dysgonic) GNB, fastidious, growth enhanced by increased carbon dioxide

Answer 2

HACEK

Question 3

HACEK

• Cause bacterial_______and ______

Answer 3

endocarditis (heart valves with vegetative lesions) & peritonitis

Question 4

• less common cause

Answer 4

Haemophilus (H. paraphrophilus, etc.)

Question 5

• bites by cattle/sheep/pigs/horses;
  periodontitis

Answer 5

Aggregatibacter aphrophilus (formerly H. aphrophilus), A. actinomycetemcomittans

Question 6

• human bites or fights (clenched fist wounds)

Answer 6

Eikenella corrodens

Question 7

• affects pediatric population

Answer 7

Kingella spp. (K. denitrificans & K. kingae)

Question 8

Gram stain: small coccobacillus

Colony morphology: raised, convex, granular, yellowish

Answer 8

Aggregatibacter aphrophilus

Question 9

Gram stain: very small coccobacillus
Colony morphology: small colonies that adhere to agar

Answer 9

Aggregatibacter actinomycetemcomitans

Question 10

Gram stain: straight bacilli, spindles, rosettes
Colony morphology: smooth, opaque, adherent to agar

Answer 10

Cardiobacterium hominis

Question 11

Gram stain: straight bacilli
Colony morphology: usually pits the agar

Answer 11

Eikenella corrodens

Question 12

Gram stain: coccoid to straight bacilli, chains and pairs, square ends
Colony morphology: two types: spreading and corroding or smooth and convex ß-hemolysis under colony

Answer 12

Kingella kingae

Question 13

Gram stain: long, thin bacilli; tapered ends
Colony morphology: flat colonies, irregular in shape, may appear purple

Answer 13

Capnocytophaga spp.

Question 14

Indole +

Answer 14

Cardiobacterium hominis

Question 15

Smells like bleach
Ornithine +

Answer 15

Eilenella corrodens

Question 16

Nitrate-

Answer 16

Kingella kingae

Question 17

Esculin V

Answer 17

Capnocytophaga