ID

Question 0

The reservoir for EHEC H157:H7 is ?

Answer 0

Cattle

Question 1

Enterohemorrhagic strain E.

coli (EHEC) H157:H7 can be complicated by?

Answer 1

Thrombotic thrombocytopenic pursues
(TTP)
Hemolytic uremic syndrome (HUS)

Question 2

The outbreak of Enterohemorrhagic strain E.

coli (EHEC) H157:H7 most often has been associated with ?

Answer 2

consumption of inadequately cooked Hamburger (ground beef)

Question 3

Risk of infection/ transmission after exposure

Answer 3

Virus exposure Risk of transmission

HIV+ 0.1-0.3%
HCV + 2%
HBsAg+/HBeAg- 23-37% (1/3)
HBsAg+/HBeAg+ 37-62% (1/3 -2/3)

Question 4

Which GI organism is Least susceptible to chlorination ?
   A. Shigella 
   B. E Coli
   C. Cholera
   D. Bacillus anthracis

Answer 4

Bacillus anthracis spores were less susceptible to chlorine disinfection than the gram-negative organizations.

Question 5

Anthrax prophylaxis

Answer 5

8wk of Abx

Question 6

Anthrax PEP

Answer 6

Abx for 60days + 3 doses of anthrax vaccine adsorbed (AVA)

Ciprofloxacin, doxycycline, and penicillin G procaine have demonstrated efficacy for inhalation anthrax PEP.

Question 7

Vibrio parahaemolyticus

Answer 7

• is associated with fecally contaminated water and contaminated raw fish and shellfish

Question 8

E. Coli

Answer 8

Is linked to raw milk and raw or partially cooked meats and poultry.

Question 9

Yersinia

Answer 9

Is associated with raw meat and meat products (esp. Pork), poultry, fresh vegetables, and milk

Question 10

Campylobacter

Answer 10

Is associated with raw poultry and meat, raw milk and unpasteurized dairy products, and fecally contaminated raw vegetables.

Question 11

Staph aureus

Answer 11

Is associated with food that are inadequately cooker or refrigerated, such as pastries, custards, salad, dressings, sandwiches, and meat products.
Staph aureus produces a heat stable toxin which survives boiling for 25 min.
It is also highly tolerate to salt.

Question 12

E. Coli 0157:H7

Answer 12

1. Requires low does (less than 100 organisms) for diarrheal response
2. An important cause of both bloody diarrhea and hemolytic uremic syndrome (HUS)
3. Most commonly linked to consumption of undercooked ground beef

Question 13

Cryptosporidiosis

Answer 13

• fecal-oral transmission, person-to-person contact, or animal-to-person contact
• ingestion of fecally contaminated water appears to be of the greatest public health significance
• effective preventive measures include boiling or filtration
• Cryptosporidium oocysts may be as small as 2-3 micrometers in diameter; therefore, a minimum filter pore size of 1 micrometer should be used.
• chemical disinfectant are not effective against the oocysts (chlorine resistant)
• primary symptoms include diarrhea accompanied by abdominal cramping
• Dx may be made by identifying oocysts in fecal smears

Question 14

Which GI organism is Least susceptible to chlorination ?
   A. Cryptosporidium 
   B. Giardiasis 
   C. Cholera
   D. Bacillus anthracis

Answer 14

A

Question 15

Cryptosporidium and Gardiasis,Which is more resistant to chlorine?

Answer 15

Cryptosporidium

Question 16

Dengue is transmitted through ? Vector ?

Answer 16

Aedes aegypti