Intro To Bacteria

Question 1

4 bacteria that produce exotoxins that increase cAMP levels

Answer 1

cAMPmnemonic
c: cholera (Vibrio cholera)
A: anthrax (Bacillus anthracis)
M: montezumas revenge (ETEC)
P: Pertussis (Bordetella pertussis)

Question 2

3 most common pathogens associated with meningitis in neonates and infants less than 3 months of age?

Answer 2

GBS
listeria
E. Coli

Question 3

Where is Viridians streptococci normal flora?

Answer 3

GI tract, nasopharynx, gingiva

Question 4

Clinical significance for a positive blood culture with Anginosus sp.?

Answer 4

Suspect there is an abscess hiding in an organ somewhere and order CAT scan

Question 5

3 mechanisms associated with otitis media

Answer 5

S. Pneumonia
Haemophilis influenzae
Moraxella catarrhalis

Question 6

Where are Enterococci (GDS) considered normal flora?

Answer 6

Bowel

Question 7

Unique characteristic of enterococcus sp.

Answer 7

Ability to grow in bile (40%) and NaCl (6.5%)

Question 8

S. bovis (Non enterococci) infection is associated with what condition?

Answer 8

Colon cancer

Question 9

What bacteria is both catalase and coagulate positive?

Answer 9

Staph aureus

Question 10

Infection from indwelling catheter and prosthetic devices is associated with what bacteria sp.?

Answer 10

Staphylococcus epidermidis

Question 11

What is unique about Bacillus anthracis capsule

Answer 11

Only bacterium with capsule composed of poly-D-glutamic Acid

Question 12

Appropriate culture medium for Corynebacterium diptheriae

Answer 12

Throat and nasopharynx swabs cultured on potassium tellurite agar and Loeffler’s coagulated blood serum

Question 13

Group at highest risk of listeria monocytogenes infection

Answer 13

PREGGGGGGIESSSSS (3rd trimester)

Question 14

Neisseria meningiditis high risk groups?

Answer 14

1. Infants 6 months - 2 yrs
2. Army recruits
3. College freshmen

Question 15

Characteristic culture medium for N. meningiditis

Answer 15

Thayer-Martin VCN
Chocolate agar with antibiotics
V vancomycin kills G+ organisms 
C colistin (polymyxin) kills G- organisms except neisseria
N nystatin eliminates fungi

Question 16

What bacterial sp. grow on MacConkeys agar? What color do they form?

Answer 16

E. Coli, Klebsiella, serratia, and enterobacter

Pink

Question 17

Infection from what bacteria can present as pseudo appendicitis?

Answer 17

Yersinia enterocolitica

Question 18

Which bacteria is associated with a grape like odor when plated?

Answer 18

Pseudomonas aeruginosa

Question 19

Pneumonia + diarrhea = what dz?

Answer 19

Legionnaires