Term
What are the receptors for:
- Influenza
- EBV
- Rhinovirus
- Adenovirus
- Rabies
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Definition
- Influenza: sialic acid
- EBV: CD3 complement receptor on B cells
- Rhinovirus: ICAM-1 on mucosal cells
- Adenovirus: CD55 (DAF) and CAR (coxsackie adenovirus receptor)
- Rabies: acetylcholine receptor on neurons
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Term
What cytokines are key players in upregulating cell-mediated immunity to eradicte a viral infection? |
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Definition
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Term
What are the sensing mechanisms of cells to virus? |
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Definition
- RIG-I detect dsRNA in the cytoplasm
- TLR's detect viral RNA at the cell surface or within the endosome
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Term
What is the role of IFN in cell-mediated immune response to virus? What compounds are produced in response to IFN? |
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Definition
IFN upregulates:
- Mx protein: inhibits viral assembly
- PKR (protein kinase R): inhibits viral protein translation
- OAS (oligoadenylate synthase): synthesis poly-A molecule that activates RNase L
- RNase L: cleaves viral RNA
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Term
Which viruses have live attenuated vaccines? |
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Definition
- Measles
- Mumps
- Rubella
- Polio
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Term
For human parvovirus, give the:
- Size
- Enveloped or non-enveloped?
- Genome, and replicates where?
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Definition
- 45 nm
- Non-enveloped
- Circular dsDNA, so replicates in the nucleus
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Term
For human papilloma virus, give the:
- Size
- Enveloped or non-enveloped?
- Genome, and where does it replicate?
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Definition
- 50-55 nm
- Non-enveloped
- Circular dsDNA, replicates in the nucleus
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Term
Between parvovirus and papilloma virus, which one transcribes from both DNA strands? Which one transcribes early and late antigens? |
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Definition
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Term
What infections does parvovirus cause? |
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Definition
Opportunistic infections:
- SV40 in monkeys
- BK: renal disease
- JC: PML, B cell and monocyte infection
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Term
What infections do human papilloma viruses cause? |
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Definition
- HPV 6 and 11: genital warts
- HPV 16 and 18: cervical hyperplasia
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Term
- How is human parvovirus transmitted?
- How is human papilloma virus transmitted?
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Definition
- Inhalation
- Contact with surfaces
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Term
What are the virulence factors for parvovirus and how do they function? |
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Definition
Late T antigen:
- Initiates transcription of viral DNA
- Binds to p53 and P105RB to induce S phase in the host cell
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Term
What are the virulence factors for human papilloma virus and how do they function? |
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Definition
- E1 and E2 initiate transcription of viral DNA
- E6 and E7 bind to P53 and P105RB to induce S phase in the host cell
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Term
Between parvovirus and human papilloma virus, which can replicate in vitro? |
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Definition
Parvovirus (papilloma virus requires epithelial cells) |
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Term
What form is latent parvovirus DNA? Papilloma virus DNA? |
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Definition
Parvovirus: plasmid
Papilloma virus: integrated |
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Term
How does latent human papilloma virus cause dysplasia? |
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Definition
E1 and E2 are inactivated so do not cause the virus to replicate. E6 and E7 continue to induce S phase in the host cell, which causes dysplasia. |
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Term
From which protein is the human papilloma virus vaccine made? |
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Definition
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Term
For herpes virus:
- Size?
- Enveloped or non-enveloped?
- Genome and replication site?
- Histone-bound?
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Definition
- 75-150 nm
- Enveloped
- dsDNA
- Only latent DNA bound by histone
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Term
Describe the cascade of transcription of herpes virus DNA |
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Definition
- Immediate Early: alpha proteins that act as transcription factors for beta proteins
- Early: beta proteins that are both enzymes (including DNA polymerase) and transciption factors for gamma proteins
- Late: gamma proteins that are structural proteins
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Term
Does herpes virus use it's own or the host's DNA polymerase? |
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Definition
Both. It uses its own duringa active infection and uses the host's during latent infection. |
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Term
Which herpes viruses only have one isomer of DNA? |
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Definition
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Term
Is latent human herpes virus integrated or plasmid? |
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Definition
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Term
Infections caused by HSV-1 and HSV-2? |
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Definition
- Genital and non-genital warts
- Encephalitis (HSV-1)
- Meningitis (HSV-2)
- Gingivostomatitis
- Herpetic keratitis
- Herpetic Whitlow
- Neonatal herpes
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Term
What diseases do HSV-6 and HSV-7 cause? |
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Definition
Roseola infantum (exanthema subitum) |
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Term
What diseases do HSV-8 cause? |
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Definition
- Kaposi's sarcoma
- Castleman's disease (non-malignant B cell proliferative disorder)
- Body-cavity based effusion lymphoma
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Term
What diseases do CMV cause? |
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Definition
- Heterophile Ab (-) infectious mono
- Transplacental disease
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Term
What diseases do EBV cause? |
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Definition
- Heterophile Ab (+) infectious mononucleosis
- Burkitt's lymphoma
- Nasopharyngeal carcinoma
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Term
What are the herpes viruses that effect humans? |
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Definition
HSV-1, HSV-2, HSV-6, HSV-7, HSV-8, CMV, EBV, VZV |
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Term
What is the mechanism of phosphoanacetic and phosphonoformic acid? |
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Definition
Bind to Herpes viral DNA polymerase and prevent elongation of viral DNA |
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