Opportunistic Infections

Question 1

Almost all bacteria need iron for growth. What are two exceptions?

Answer 1

Treponema pallidum and Lactobacilli

Question 2

Which form of iron is insoluble?

Answer 2

Fe3+

Question 3

The _________ form of iron is red.

Answer 3

Fe3+

Question 4

______________ cross links alganine (sp?) in cystic fibrosis patients and aggravates Pseudomonas colonies.

Answer 4

Calcium (present in excess in CF patients)

Question 5

______________ has been observed to grow in distilled water or compounds that contain benzene.

Answer 5

P. aeruginosa

Question 6

P. aeruginosa’s toxin is similar to a toxin produced by what other kind of bacteria?

Answer 6

Gram-positive rod (being C. diphtheriae)

Note: Both have a binding unit (B) and an active unit (A). They have the same effect but target different proteins.

Question 7

Endotoxin activates three pathways: _________________.

Answer 7

the complement cascade, factor XII, and factor VII

Question 8

In addition to hot tubs and medical equipment, P. aeruginosa has also been found contaminating _____________.

Answer 8

piercing tools

Question 9

What’s the name of P. aeruginosa’s exotoxin?

Answer 9

Exotoxin A