Fastidious GNBs

Fastidious Gram-Negative Bacilli/Coccobacilli

a. Haemophilus

i. H. influenzae – requires X and V (CHOC AGAR)

ii. H. parainfluenzae – requires V

iii. H. ducreyi – requires X

iv. H. aphrophilus – No X or V requirement

b. HACEK group

i. Haemophilus aphrophilus

ii. Actinobacillus actinomycetemcomitans

iii. Cardiobacterium hominis

iv. Eikenella corrodens

v. Kingella kingae

c. Bordetella pertussis

d. Pasteurella multocida

e. Brucella sp.

f. Campylobacter – small, curved bacilli (seagulls)

i. C. jejuni – growth at 42 degrees celcius

ii. C. coli - growth at 42 degrees celcius

iii. C. fetus- no growth at 42 degrees celcius

g. Capnocytophaga

h. Francisella tularensis

i. Helicobacter pylori

j. Legionella, requires cysteine for growth