Gastrointestinal Infections Part II Flashcards Preview

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Flashcards in Gastrointestinal Infections Part II Deck (29):
1

What virus causes the most severe diarrheal illnesses requiring hospitalization of infants and young children?

Rotavirus

2

What do rotaviruses cause?

Inadequate capacity to absorb fluid
Inadequate secretion of digestive enzymes

3

Are rotaviruses enveloped?

No they wouldn't survive the bile

4

How can rotavirus be diagnosed?

Viral RNA and Ag can be detected in feces

5

What do Norwalk viruses include?

EBV
Influenza
Rotavirus
Rhinovirus
Measles

6

What is more infectious: vomiting or diarrhea?

Vomiting

7

Astrovirdiae are similar to what?

Calciviridae
Picornaviridae

8

What can entamoeba histolytica cause?

Ulcers due to pore-forming cytotoxins
Liver and lung abscesses

9

Where does entamoeba histolytica infect?

Cecum
Rectosigmoid regions

10

What does entamoeba histolytica form?

Cysts

11

Treatment of amoebiasis?

Metronidazole
Tinidazole

12

Amoebiasis diagnosis?

Microscopic examination of stool for cysts

13

Giardia intestinalis produces what?

Foul smelling stool with excessive gas

14

What are nematodes?

Roundworms

15

What do ascaris worms do?

Move around the body

16

What can ascaris cause?

Urticaria (hives) and eosinophilia (increased eosinophils): Loeffler's syndrome

17

When can strongyloidiasis be fatal?

When it disseminates in immunosuppressed patients causing spongyloidiasis

18

What are cestodes?

Tapeworms

19

What are cysticercus?

A tapeworm larva

20

Where are Taenia saginata cysticercus found?

In beef

21

What do damaged hepatocytes spill?

Aminotransferases (ALT, AST)

22

What is important in diagnosing viral infections?

Serology

23

Hepatitis A is a member of what family?

Picornaviridae with positive sense ssRNA

24

What is the diagnosis of Hepatitis A?

Anti-HAV IgM

25

Why is anti-HAV IgM more diagnostic than IgG?

IgM is only elevated during times of infection so if it is elevated then there was a recent infection or ongoing infection

26

What family does Hepatitis E belong to?

Hepeviridae

27

Diagnosis for Hepatitis E?

Antibodies or RNA

28

Hepatitis B is the member of what family?

Hepadnaviridae

29

What envelopes hepatitis E?

HBsAg glycoprotein