Viral Diseases of the Digestive Tract

Question 1

1. Mumps - target what?

Answer 1

targets parotid glands (1 of the 3 salivary glands)

Saliva or respiratory transmission through inhalation

Question 2

When is person most infectious with Mumps?

Answer 2

48 hours. before symptomatic AND has already developed viremia

Question 3

What is common in post-pubescent males that can lead to sterility in Mumps?

Answer 3

Orchitis

Question 4

What is vaccine for Mumps?

Answer 4

MMR vaccine is a trivalent attenuated vaccine

Question 5

2. Hepatitis

Answer 5

many variations - all viral -

Question 6

HAV

Answer 6

Single stranded (SS) Rna virus without an envelope

• no chronic form
• food borne transmission

Question 7

HBV

Answer 7

Double stranded (DS) DNA virus with an envelope

• not found in urine or fecest but found in other body fluids
• many patients clear the virus
• Chronic patients die of liver cancer or cirrhosis

Question 8

HCV

Answer 8

SS RNA virus with envelope

• 70-80 days between infection and detectable antibodies in the blood.
• undetectible until chronic - then leads to liver cancer or cirrhosis
• kills more people than AIDS in US

Question 9

HDV

Answer 9

SS RNA virus only found in those that already have HBV

• increases mortality rate of HBV patients
• not infectious on its own

Question 10

HEV

Answer 10

SS RNA virus with an envelope

• fecal/oral transmission
• does not cause chronic liver disease