Week 3 - Viruses

Question 1

Hepatitis A and E are transmitted mainly via _____

Answer 1

fecal-contaminated food and water

Question 2

Hepatitis B, C and D are transmitted by ______

Answer 2

blood and/or sexual exposure

Question 3

The most significant infectious occupational risk in the US is __________

Answer 3

Hepatitis B

Question 4

The incubation period of HAV is ____

Answer 4

15-50 days

Question 5

HAV is more frequently found in what population?

Answer 5

children and young adults

Question 6

Which sub-types of hepatitis have vaccines?

Answer 6

HAV, HBV

Question 7

HBV is spread through contact with ______

Answer 7

contaminated blood and body fluids

Question 8

70% of those infected with HBV are contagious through which phase of infection?

Answer 8

convalescent

Question 9

Incubation period of HBV is ____

Answer 9

50-180 days

Question 10

HCV is transmitted by ______

Answer 10

exposure to contaminated blood

Question 11

The incubation period of HCV is _____

Answer 11

20-90 days

Question 12

The onset of HBV and HCV is _______

Answer 12

insidious

Question 13

Hepatitis __ is a defective virus that requires concurrent HBV infection for development of disease

Answer 13

D

Question 14

HEV is transmitted via _____

Answer 14

fecal contamination

Question 15

The incubation period of HEV is ___

Answer 15

15-60 days

Question 16

The onset of HEV, like HAV, is ____

Answer 16

abrupt

Question 17

HCV becomes chronic ___% of the time

Answer 17

50%

Question 18

HBV becomes chronic ___% of the time

Answer 18

5-10%

Question 19

HIV targets the ______ as its host, which interrupts the _____

Answer 19

CD4 (T4) lymphocytes

cell-mediated response to antigens

Question 20

HIV is transmitted via ____

Answer 20

exchange of body fluids - blood, semen, vaginal secretions, breast milk, can cross the placenta

Question 21

Two methods to test for HIV are _______

Answer 21

ELISA - enzyme linked immunosorbent assay

Western Blot

Question 22

___ is the end stage of HIV infection

Answer 22

AIDS

Question 23

The official diagnosis of AIDS is _____

Answer 23

CD4 (T4) cell count < 200 plus one clinical condition

Question 24

Which types of Hepatatis have carrier states?

Answer 24

HBV, HCV, HDV