Viruses III

Question 1

hepatitis delta virus

Answer 1

can only replicate with the help of HBV

-uses HBV envelope

Question 2

superinfection

Answer 2

hepatitis delta infects a person who has chronic hepatitis B infection

-fulminant hepatitis
cirrhosis
greater mortality

Question 3

leading cause of chronic hepatitis in the US

Answer 3

hepatitis C

also leading indication for liver transplant

Question 4

enveloped RNA virus in flavivirus family

Answer 4

hepatitis C

Question 5

diagnosis of hepatitis C

Answer 5

anti HCV Abs

-confirmed by RIBA

Question 6

hepatitis E virus

Answer 6

non-A hepatitis

Question 7

picorna viridae

Answer 7

hepatitis A

• positive single strand RNA
• icosahedral
• no envelope

Question 8

hepadna viridae

Answer 8

hepatitis B

Question 9

mitogens

Answer 9

growth factors

Question 10

retroviruses and cancers

Answer 10

most cause leukemia or sarcoma

Question 11

integrase

Answer 11

facilitates

Question 12

rous sarcoma firus

Answer 12

src oncogene

• acute transforming virus
• put gene in host

Question 13

tropical spastic paraparesis

Answer 13

HTLV-1

• caribbean islands
• paralytic disease
• human T cell leukemia virus

Question 14

HIV-2

Answer 14

disease similar to AIDs in western africa

Question 15

structure of HIV

Answer 15

spherical enveloped virion with central cylindrical nucleocapsid