Characteristics

Question 1

• erythritol stimulates replication
• cannot survive acidic envi
• better in colder envi

Answer 1

Brucellosis

Question 2

• mostly survive INSIDE a host (but also can outside)
• catalase-Negative

Answer 2

Streptococcosis

Question 3

• in estuarine waters
• horizontal gene transfer
• can form biofilm (persistence)
• SALT

Answer 3

Vibriosis

Question 4

Invades
1. colonic epithelium
2. rectal epithelium

• modify membrane LPS
• shiga toxin-producing [df]

Answer 4

Shigellosis

Question 5

colonizes epithelium of small & large intestine

Answer 5

Salmonellosis

Question 6

salt & drying tolerant

survive gastric acidity

Answer 6

Collibacillosis

Question 7

• resistant to stomach acid
• has plasmid pYV — distinguish virulent strain from avirulent

Answer 7

Yersiniosis

Question 8

mostly acute & cutaneous disease of pigs & humans

isolated in:
1. tonsils
2. skin
3. subcutaneous adipose tissue
4. medial iliac lymph nodes

Answer 8

Erysipeloid

Question 9

less viable in environment except in:
1. damp soil
2. water

virulence factors
1. capsular antigen
2. somatic antigen

Answer 9

Pasteurellosis

Question 10

• needs high water content
• needs absence of inhibitory conc. of salt (<10%)
• easily inhibited by other bacteria
• spores — long survival time
• toxin inactivated by sunlight

• vegetative cell susceptible to
1) 1% hypochlorite
2) 70% ethanol
3) nitrite-based compound

Answer 10

Botulism

Question 11

• several months in SOIL
• cold, moist, dark
• rarely isolated from soil & pasture of infected CATTLE

Answer 11

Tuberculosis