Chapter 24: Digestive System Infections - Lower Viral + Liver Viral Flashcards

1
Q

What viruses cause viral gastroenteritis?

A

enterovirus group:
- rotaviruses
- Norwalk virus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are symptoms of viral gastroenteritis? (3)

A
  • low fever
  • diarrhea
  • vomiting “stomach flu”
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How can you treat viral gatroenteritis?

A

self-resolving in about a week

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How is viral gastroenteritis transmitted? (2)

A
  • faecal-oral route
  • frequent cause of epidemic diarrhea
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How can you treat viral gastroenteritis?

A
  • rehydration therapy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How can you prevent gastroenteritis? (2)

A
  • proper hand-washing
  • vaccines exist against some enteroviruses (not all)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is hepatitis? (2)

A
  • inflammation of the liver
  • caused by several different unrelated viruses
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is Hep A?

A
  • Infectious hepatitis spread by fecal-oral route
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what does hep A cause? (2)

A
  • acute infection
  • self resolving in a few months
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are symptoms of Hep A? (4)

A
  • Malaise
  • diarrhea
  • nausea
  • liver damage, jaundice
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How can you treat hep A?

A

none

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How can you prevent Hep A? (2)

A

inactivated whole agent vaccine - given to those at risk
post exposure - passive immunization with pre-made antibiotics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is Hep B?

A
  • serum hepatitis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How is Hep B transmitted?

A
  • direct or indirect contact with body fluids (ex. blood, semen)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What infections does Hep B cause?

A
  • most cases result in acute infection that are self- resolving
  • some develop into chronic infection
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What occurs in the liver as a result of Hep B? (4)

A
  1. Viruses multiplying inside liver cells induce a cell-mediated response
  2. Cell death can lead to cirrhosis, hardening of the liver
  3. Viral DNA is integrated into host cell genome as a provirus
    - can lead to liver cancer
17
Q

How is Hep B treated? (2)

A
  • no cure
  • treatment with antivirals to slow multiplication and prevent liver damage
18
Q

How can you prevent Hep B?

A
  • subunit vaccine given to children and those at risk
  • avoiding contact with blood and other body fluids
19
Q

What is Hep C?

A

Transfusion transmitted hepatitis

20
Q

How is Hep C transmitted?

A
  • indirect contact through fomites
    ex. syringes, tattoos, and piercing equipment
21
Q

Is there a delay between infection and detection for Hep C?

A
  • delay of about 25 days
22
Q

Hep C can cause chronic infection. What occurs here? (2)

A
  • no apparent symptoms for about 20 years
  • eventually result in cirrhosis of the liver, liver cancer
23
Q

How can you prevent Hep C? (2)

A
  • no vaccine
  • avoid contact with contaminated fomites
24
Q

how can you treat Hep C? (2)

A
  • combination of interferon and antivirals can cure hepatitis C
  • current cost of treatment is around $80,000