Module 6: Bacillus

Question 1

“Medusa-head” colony

Answer 1

Bacillus

Question 2

Wool sorter’s disease

Answer 2

Pulmonary anthrax

Question 3

Major human pathogen of the genus Bacillus

Answer 3

B. anthracis

Question 4

Bacillus species used as a biological control for gas sterilization

Answer 4

B. subtilis

Question 5

Optimum growing conditions for B. anthracis

Answer 5

Blood agar in oxygen at 35C

Question 6

Differentiating B. anthracis from other Bacillus species

Answer 6

B. anthracis is gamma hemolytic while other Bacillus species are beta hemolytic. B. anthracis is non-motile while many other species of Bacillus are motile. B. anthracis is sensitive to penicillin and Bacillus species are resistant to penicillin

Question 7

Forms of anthrax in humans

Answer 7

Cutaneous anthrax
Pulmonary anthrax
Intestinal anthrax

Question 8

Cellular morphology of Bacillus species

Answer 8

Gram positive or Gram variable large rods with blunt to square ends, sometimes with spores