Micro Systems

Question 1

Common cause of pneumonia in immunocompromised patients

Answer 1

Pneumocystis jiroveci

Question 2

Most common cause of atypical/walking pneumonia

Answer 2

Mycoplasma pneumoniae

Question 3

Common causative agent for pneumonia in alcoholics

Answer 3

Klebsiella

Question 4

Can cause an interstitial pneumonia in bird handlers

Answer 4

Chlamydia psittaci

Question 5

Often the cause of pneumonia in patients with a history of exposure to bird and bat feces

Answer 5

Histoplasma

Question 6

Often the cause of pneumonia in patients who have recently visited S. California, New Mexico, or West Texas

Answer 6

Coccidiodes

Question 7

Pneumonia associated with “current jelly” sputum

Answer 7

Klebsiella

Question 8

Causes Q fever

Answer 8

Coxiella burnetii

Question 9

Associated with pneumonia acquired from air conditioners

Answer 9

Legionella pneumophilia

Question 10

Most common cause of pneumonia in children 1 year old or younger

Answer 10

RSV

Question 11

Most common cause of pneumonia in neonates (birth-28 days)

Answer 11

Group B strep

E coli

Question 12

Most common cause of pneumonia in children and young adults (including college students, military recruits, and prison inmates)

Answer 12

Mycoplasma pneumoniae

Question 13

Most common cause of viral pneumonia

Answer 13

RSV

Question 14

Causes wool-sorter’s disease (a life-threatening pneumonia)

Answer 14

Bacillus anthracis

Question 15

Common pneumonia in ventilator patients and those with Cystic Fibrosis

Answer 15

Pseudomonas

MRSA

Question 16

Pontiac Fever

Answer 16

Legionella

Question 17

What are the causes of lung abscess? Treatment?

Answer 17

• Anaerobes
  
  • Bacteroides
  • Fusobacterium
  • Peptostreptococcus
• S. aureus
• Klebsiella
• Gram (-)

Treatment

• Clindamycin

Question 18

Cause of Acute bacterial endocarditis

Answer 18

S.aureus

Large vegetations on previously normal valves

Rapid onset

Question 19

Cause of Subacute bacterial endocarditis

Answer 19

Viridans strep. spp.

Smaller vegetations on congenitally abnormal or diseased valves

Gradual onset

Assoc. w/ dental procedures

Question 20

Cause of bacterial endocarditis on prosthetic valves

Answer 20

S. epidermidis

Question 21

Causes of Tricuspid valve endocarditis

Answer 21

Assoc. w/ IV drug use

1. S. aureus
2. Pseudomonas
3. Candida

Question 22

Causes of culture-negative endocarditis

Answer 22

1. Coxiella burnetii
2. Bartonella spp.
3. Brucella spp.

(all are intracellular)

Question 23

What is Reynold’s pentad for cholangitis?

Answer 23

• Fever
• Jaundice
• RUQ pain
• HypoTN
• Altered mental status