Ch. 24 - Bacillus

Question 1

Bacillus

Answer 1

Aerobic, spore-forming G+b

B. anthracis
B. cereus

Question 2

B. anthracis

Answer 2

G+b; colonies “ground glass” and “medusa head”
Anthrax; biowarfare

Toxin
Capsule

pX01 codes for Protective antigen (PA), Edema factor (EF), Lethal factor (LF)

PA + EF –> Edema toxin
PA + LF –> Lethal toxin

Question 3

B. cereus

Answer 3

gastroenteritis
heat stable enterotoxin (emetic)
heat labile enterotoxin (diarrheal)

Food poisoning (emetic and diarrheal)

traumatic eye infections
catheter septicemia

Question 4

Anthrax

Answer 4

B. anthracis

Cutaneous - spores thru skin
Most cases
nectoric eschar

GI - ingestion

Inhalation - (wool-sorter’s disease) biowarfare
macrophages ingest spores –> mediastinal lymph nodes
high mortality