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Flashcards in VIRUSES Deck (129)
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1

Name 5 Flaviviruses

HCV (only one not an arbovirus), Yellow fever, West Nile, St. Louis encephalitis, and Dengue

2

What determines tropism when phenotypic mixing of viruses occurs?

The coat that the virus takes with it (this is when 2 viruses infect a cell and one takes the other's coat; HOWEVER, after infection in the new tissue, the virions expressed will have their original coat)

4

What are 4 important paramyxoviruses?

Parainfluenzae (croup), Respiratory Syncytial Virus (RSV), Measles (rubeola) and Mumps (all can form syncytia)

4

Which picornavirus is not spread via a fecal oral route?

Rhinovirus

5

Which RNA viruses are NOT ssRNA?

Reoviridae (rotavirus)

5

What is Gerstmann-Straussler-Scheinker syndrome?

inherited prion disease

6

Which cause of hepatitis is a picornavirus?

HAV

6

What are the likely organisms for the following neurologic findings in an AIDS pt 1) Encephalopathy 2) Abscess 3) Meningitis 4) Retinitis 5) Dementia

1) JC virus reactivation 2) Toxoplasma gondii 3) Cryptococcus neoformans 4) CMV (with cotton wool spots) 5) directly related to HIV

7

What is the structure of the Parvovirus genome?

ssDNA and linear (smallest DNA virus; largest = poxviruses)

7

What is a Tzanck test used to detect? What is it looking for?

Herpes (HSV 1 and 2, and VZV); it is looking for multinucleated giant cells

8

What is an adult infection with parvovirus like?

Rheumatoid arthritis-like with pure red cell aplasia

9

What are HHV 3, 4, and 5?

3 = VZV, 4 = EBV and 5 = CMV

9

What monoclonal antibody is used to prevent pneumonia from RSV infection in premature infants? MOA

Pavalizumab (binds to F protein, fusion protein)

10

Which RNA viruses do not replicate in the cytoplasm?

Influenza and retroviruses

11

Most common cause of sporadic encephalitis in US

HSV-1

11

Which hepatitis is a flavivirus? Which is a picornavirus?

Flavivirus enveloped (+) ssRNA = Hep C; Picornavirus naked (+) ssRNA = Hep A

12

What type of genome must a virus have in order to do recombination?

Segmented

13

Can you give live-attenuated vaccines to HIV patients?

If they are not showing signs of IC then it is at least safe (according to FA) to give them the MMR

14

What are 3 cancers associated with EBV?

1) Hodgkin's lymphoma 2) Burkitt's lymphoma and 3) Nasopharyngeal carcinoma (Asians)

15

Name 2 recombinant vaccines

HBV and HPV (6 and 11 = warts; 16 and 18 = cervical CA)

16

What kind of virus is Lymphocytic Choriomeningitis virus?

LCMV = Arenavirus

17

Which virus can cause a heterophile antibody negative (sheep abs) infectious mononucleosis?

CMV

18

What is the kissing disease? What is transmitted by the kissing bug?

Epstein-Barr virus; Trypanosoma cruzi

19

What are atypical lymphocytes? Are they infected?

Reactive cytotoxic T cells that are responding to EBV infection of B cells

19

What causes pure red aplasia and rheumatoid arthritis like Sx in adults?

Parvovirus B19

20

How do you get HSV-1?

Respiratory secretions and saliva

20

What inclusion body do you commonly see in herpes infections?

Cowdry type A intranuclear (intranuclear because herpes viruses replicate IN THE NUCLEUS!)

21

What kind of virus is norovirus? Rotavirus?

Norovirus = a calicivirus (SS linear RNA), Rotavirus = a reovirus (DS linear 10-12 segments RNA)

22

Name 3 togaviruses

Measles (Rubella), Eastern Equine encephalitis; Western Equine encephalitis

23

What is exanthem subitum?

Roseola (HHV-6)