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BIO 225 -- CH24 --DNA viruses
Terms in this set (33)
2 types of persistent infections
Chronic viral infections and latent viral infectoins
the virus is detectable in tissue samples and is still multiplying at a slow rate, but symptoms of infection are usually mild or absent. Ex. HIV, HBV.
result when the virus enters a dormant phase inside host cells and becomes inactive after a lytic infection. It is not multiplying, generally not detectable, and does not cause symptoms during latency. Ex. herpesviruses
persistent viruses by virtue of their tendency to induce cancer.
oncogenic DNA viruses
Epstein-Barr virus, Human herpesvirus-8, Hepatitis B, Certain papillomaviruses, Burkitt lymphoma, Kaposi sarcoma, Hepatic carcinoma, Cervical and penile cancer.
Oncogenic RNA viruses
Retrovirus HTLV 1, Leukemia, Hepatitis C, Liver cancer.
effects include rubella and cytomegalovirus
The agent of smallpox, and vaccinia, a closely related virus used in vaccinations.
Poxviruses produce eruptive skin pustules called pocks, which leave small, depressed scars (pockmarks) upon healing.
causes a skin disease called molluscum contagiosum
2 varieties of herpes simplex
HSV-1 and HSV-2
usually characterized by lesions on the oropharynx. Ex. gingivostomatitis, herpetic keratitis (oral herpes)
usually producing lesions on the genitalia. Ex. Genital herpes
Cause two forms of disease: herpes zoster (shingle) and varicella (chickenpox) .
another group of herpesviruses, are named for their tendency to produce giant cells with nuclear and cytoplasmic inclusions. Also termed salivary gland virus and cytomegalic inclusions virus, are among the most ubiquitous pathogens of humans.
is a syndrome characterized by fever and lymphocytosis, somewhat similar to the disease caused by Epstein-Barr virus.
EBV, shares morphological and antigenic features with other herpesviruses. transform certain lymphocytes into malignant cells
chronic fatigue syndrome, or chronic fatigue immunodeficiency syndrome.
is a malignancy of epithelial cells that occurs in older Chinese and African men.
an acute febrile disease in babies between 2 and 12 months of age. It begins with fever that can spike as high as 105F and is followed a few days later by a faint rash over the neck, trunk, and buttocks
the major group of DNA viruses involved in hepatitis
Hepatitis B virus (HBV)
causes a common form of hepatitis in humans, and related viruses cause hepatitis in other vertebrates
Hepatitis A virus (HAV)
is a nonenveloped RNA enterovirus transmitted through contaminated food.
Hepatitis C Virus (HCV)
a flavivirus that causes many cases of transfusion hepatitis. is involved in a chronic liver infection that can go undiagnosed, later leading to severe liver damage and cancer.
Hepatitis D virus (HDV)
has a circular RNA genome more closely related to viroids than other viruses. It can only occur with HBV infection.
the cause of the common cold of young children, 30 types associated with human infection
an inflammation of the conjuncitiva and cornea
or verruca, a squamous epithelial growth, also call papilloma
common or seed warts
painless, elevated, rough growths on the fingers and occasionally on other body parts, commonly occur in children and young adults
are deeper, painful papillomas on the soles of the feet; flat warts are smooth, skin-colored lesions that develop on the face , trunk, elbows, and knees.
is a prevalent STD and is linked to some types of cancer.
five rash of childhood
rubella, rubeola, scarlet fever, scarletina, and erythema infectiosum
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