Ch 24 STUDYGUIDE

DNA Viruses

list the name of all DNA viruses

HSV 1

HSV 2

Varcella Zoster Virus

Variola Virus

Adenovirus

Hepatitis B Virus

Parvovirus

HSV 1

responsible for oral herpes and causes lesions on the oropharynx

HSV 2

responsible for genital herpes with lesions on the genetalia

Varicella Zoster Virus

chicken pox and shingles

Variola Virus

smallpox, once deadly now eradicated

Hepatitis B Virus

chronic liver failure

Adenovirus

respiratory illness, conjuctivitis, gasteroenertisis

Parvovirus

B19 in humans, causes fifth disease

In canines, causes severe gastroentertitis

chronic infections

an infection that persists over a long duration, mild to absent symptoms

latent infections

virus is dormant in the host, doesnt multiply, isnt detectable, but is present and can be reactivated

small pox

caused by variola virus

exposure through inhalation of droplets or skin crusts

2 forms: variola major (causes toxemia) & variola minor

how is the smallpox vaccine administered

uses ONE drop of the vaccina virus with a double pronged needle, a large pustule will develop and scab leaving a scar

list the herpes virus claassifications

VZV, EBV, HSV 1, HSV 2, CMV, HPV(not a herpes virus but often discussed alongside them)

VZV

varicella zoster virus: chicken pox and shingles

EBV

epstein barr virus: infects the lymphoid tissues, burkitts lymphoma virus (turns lymphocyte cells into malignant cells), causes infectious mononucleousis

CMV

cytomegalovirus: infects salivary glands

which type of herpes can cause encephalitis

HSV 1

what is unusual about HBV

its a DNA virus and has a reverse transcriptase

what causes infectious mononucleosis

EBV epstein barre virus

what is Burkits lymphoma

a B-cell canaver associated with EBV and turrns lymphocytes into malignant cells

what are giant cells

multinucleated cells, but they typically form as part of the immune response, not due to viral fusion.

what is a syncytium

a large, multinucleated cell formed by the fusion of multiple individual cells — usually caused by viral infection.

what is the fifth disease

erythema infectiosum