DNA Viruses

DNA Viruses

Mnemonic: "HHAPPPPy viruses"

1. Herpesvirus
2. Hepdnavirus
3. Poxvirus

Naked DNA Viruses

1. Adenovirus
2. Parvovirus
3. Papilloma
4. Polyoma

Focus in the MindMap below the NAKED ADN viruses:

• ADENOvirus is like ADENOids, double, naked into the throat and linear. They have RED EYES.
• PAPILLOMA and POLIOmavirus, like the picture, 2 persons naked (double), one with polio and the other with fire (papiloma) in her CIRCULAR as.
• A naked PAVOvirus with a LINEAR long neck, the most important is serotype B19 that produces fifth diseases and aplastic anemia in patients with hemolytic anemia (sickle cells, thalassemia, etc.), in utero causes hydrops fetalis.

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• HEPAdnavirus (HBV), is a liver with 2 CIRCULAR eyes enveloped for a hepatic capsule.
• Double cigarettes (linear shape) enveloped for a paper skin in the mouth (HERPES and POXviruses).

HIGH YIELD

• JC virus is a POLIOmavirus (see mindmap: DNA, double, naked, circular), infects oligodendroglial cells in the brain, produces progressive multifocal leukoencephalopaty (PML) in AIDS patients. NO treatment.
• EBV is a Herpesvirus and it infects about 50% of patients with Hodkin's lymphoma.

QUESTIONS

Q1: African american 4 yo F patient, with severe foot and toes pain, and severe anemia. What virus is the responsible?

A1: Parvovirus B19.

Q2: A researcher isolates a new double-stranded DNA virus that is sensitive to alcohol. What is the most likely means by which this virus would be transmitted in nature?

A2: Sexual / parenteral. Virus that are sensitive to alcohol are fragile, enveloped, viruses. They tend to be transmitted in ways that protect them from desiccation or change in temperature.