Unit 1- Bacillus

Question 1

Bacillus

Answer 1

Gram positive rods, spore forming, aerobic or facultative anaerobic, non fastidious, motile, catalase positive, oxidase negative

Question 2

Bacillus anthracis colonies

Answer 2

Flat, dry, grey colonies, not hemolytic

Question 3

Bacillus cereus colonies

Answer 3

Large green colonies, hemolytic

Question 4

Bacillus lichenform colonies

Answer 4

Dull, rough, wrinkled colonies

Question 5

Anthrax Epidemiology

Answer 5

Endospores in soil are ingested, inhaled, or enter through the skin

Question 6

Anthrax Pathogenesis

Answer 6

Capsule provides resistance to phagocytosis, produces exotoxins

Question 7

Anthrax Toxins

Answer 7

Protective antigen, oedema factor targets neutrophils, lethal factor targets macrophages, dendritic cells, neutrophils, and epithelial cells

Question 8

Anthrax Clinical Signs

Answer 8

Cattle and sheep have fever, depression, congestion, and abortion

Question 9

Anthrax Lesions

Answer 9

Incomplete rigor mortis, hemorrhage and edema, unclotted blood, large soft spleen in cattle

Question 10

Anthrax Diagnosis

Answer 10

Do not open carcass, presence of unclotted blood, gram stain, bacterial culture on blood agar

Question 11

Anthrax Control

Answer 11

Vaccine, PPE, avoid movement, foot baths, disposal of carcasses, formaldehyde fumigation