Exam 4 (Clinicopathologic Correlation)

Question 1

Normal skin flora often associated with acne:

Answer 1

Propionibacterium spp.

Question 2

What is the most common anaerobic contaminant of blood cultures:

Answer 2

Propionibacterium spp.

Question 3

In addition to acne, what else can Propionibacterium spp. cause:

Answer 3

endocarditis
CNS infections
Osteomyelitis
Arthritis

Question 4

List the 3 possible complications of C. diff infection:

Answer 4

• Pseudomembranous colitis
• Toxic megacolon
• Perforated colon

Question 5

This is associated with mucosal inflammation and deposition of pseudomembrane on surface composed of fibrin, neutrophils, and dead bacterial cells:

Answer 5

Pseudomembranous colitis

Question 6

This pathology is defined as inflammation of the jejunum and ileum with necrosis and is caused by the organism_____:

Answer 6

enteritis necroticans

Clostridium perfringens

Question 7

What are the at risk groups for enteritis necroticans caused by C. perfringens:

Answer 7

• protein deprivation
• poor hygiene/food handling
• Africa, Asia more common