Viral Foodborn Diseases

Question 1

T/F: Viruses are the most common cause of food borne illness?

Answer 1

True

Question 2

Hepatitis A (picornavirus)

Answer 2

replicates in liver = hepatitis

shed virus into bile = exits via feces

Question 3

T/F: Hepatitis A infection of infancy or childhood is Asymptomatic?

Answer 3

True

Question 4

Hepatitis A (picornavirus) reservoir

Answer 4

poeple (most important)

non human primates

Question 5

Hepatitis A (picornavirus) transmission

Answer 5

Direct (fecal- oral) most important

Vehicle: contaminate foods/water

Question 6

Hepatitis A (picornavirus) prevention

Answer 6

target host : vaccinate (decrease cases ~90%)
target vehicle
block transmission

Question 7

Hepatitis A (picornavirus)
      High endemicity vs Low endemicity

Answer 7

High : poor developed countries
allow HAV to spread person to person
entire population infected as children
minimal clinical disease

Low: developed countries
    seroprevalence wis lower
    age of infection is higher 
    more increased clinical signs 
    * often more outbreak seen b/c adults more susceptible

Question 8

T/F: Hepatitis A (picornavirus)
IP = 28 days (15-50)
duration varies
jaundice is a clinical sign

Answer 8

True

Question 9

Hepatitis A (picornavirus) 
     Treatment

Answer 9

1.Supportive
most recover without Tx

2. post exposure prophylaxis
   exposed but not sick (not vaccinated)
   Single Dose Hepatitis A vaccine or Ig

Question 10

T/F: Japan doesn’t vaccinate for Hepatits A

Answer 10

True

Question 11

Norovirus

Answer 11

Norwalk virus
cause acute gastroenteritis in humans
6 genogroups
G1 - G6

Question 12

T/F: Salmonella is the most common Foodborne illness worldwide

Answer 12

False

Norovirus is the most common you idiot

Question 13

Norovirus reservoir is

Answer 13

People

Question 14

Norovirus transmission

Answer 14

Direct (fecal oral)
Vehicle
food/water contaminated with feces
Fomite surfaces contaminated by fece material

Question 15

T/F: Norovirus Disease
IP= 12- 48 hours
duration = 1-3 days
coin signs= nausea and V/D

Answer 15

True

Question 16

Norovirus case definition/ Dx

Answer 16

Kaplan criteria used to determine outbreak cause by virus

Rt-PCR
stool, vomit, environment

Question 17

Norovirus Prevention

Answer 17

Target vehicle

Block transmission

Question 18

T/F: Rotavirus (reoviridae) is the most common cause of sever diarrhea in children worldwide?

Answer 18

True

Question 19

Rotavirus (reoviridae) reservoir

Answer 19

People

many animals

Question 20

Rotavirus (reoviridae) transmission

Answer 20

Direct (fecal-oral)

Vehicle
food, water, fomites contaminated with feces

Question 21

T/F: Rotavirus (reoviridae) has a low transmission risk

Answer 21

False

it is too Damn high like that one black guy said

Question 22

Rotavirus (reoviridae) prevention

Answer 22

target host (vaccinate)
        (2-3 oral dosing begin at 2 months of age for humans)

target vehicle

block transmission

Question 23

T/F: Foodborne Viral illness typically have

   short IP (except Hepatitis A)
   increase Vomiting and less diarrhea 
   shorter duration of symptoms

Answer 23

True

Question 24

T/F: Foodborne bacterial illness
moderate IP
lack vomiting
longer duartion

Answer 24

True

Question 25

T/F: Foodborne Parasitic illness
long IP
lon duration of illness

Answer 25

True

Question 26

other viral agents in food

Answer 26

Astroviruses, Adenoviruses, Parvoviruses

Question 27

Astroviruses, Adenoviruses, Parvoviruses

reservoir, transmission, prevention

Answer 27

People

direct contact, fomites, fecal-oral
vehicle: food contaminated with feces

target the vehicle: preparation and sanitation 
Block transmission (hygiene)