2Distinguishing Features

Question 1

Neisseria meningiditis/gonorrhoeae

Answer 1

G- diplococci, aerobic
catalase+ oxidase+
fastidious

Question 2

Chlamydiaceae trachomatis

C. pneumoniae, psittaci

Answer 2

G- obligate intracellular
non-motile
reticulate body (intracullular), elementary body (outside host)

Question 3

Bordetella pertussis

B. parapertussis

Answer 3

G- coccobacillus, aerobic

extremely small

Question 4

Haemophilus infuenzae

H. parainfluenzae

Answer 4

G- coccobacilli (pleiomorphic), facultative an/aerobe

oxidase+

Question 5

Moraxella catarrhalis

Answer 5

G- diplococcus, aerobic

oxidase+

Question 6

Campylobacter jejuni

C. coli, upsaliensis, fetus

Answer 6

G- spirals, microaerophiles
oxidase+
polar flagella

Question 7

Helicobacter pylori

Answer 7

G- curved rods/spirals, microaerophiles
oxidase+, catalase+, urease+
4-7 polar flagella

Question 8

Vibrio cholerae

V. parahaemolyticus, vulnificus

Answer 8

G- curved rods, facultative an/aerobes
oxidase+
polar flagella

Question 9

Enterobacteriaceae “coliforms”

E. coli, E. cloacae

Answer 9

G- bacilli, anaerobic
catalase+, oxidase-, lactose+
flagella all over (peritrichous)

Question 10

Salmonella enterica
S. typhi, paratyphi
(Enterobacteriaceae)

Answer 10

G- bacilli, anaerobic
catalase+, oxidase-, lactose-
produce H2S

Question 11

Shigella dysenteriae

(Enterobacteriaceae

Answer 11

G- bacilli, anaerobic
catalase+, oxidase-, lactose-
non-motile, no capsules