DNA viruses.

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Presentation transcript:

DNA viruses

Papovaviruses Human Papovaviridae Papillomavirus - warts Polyomavirus BK virus – renal disease JC virus – progressive multifocal leukoencephalopathy

Parvoviruses The parvoviridae are the smallest of the DNA viruses. Only one member of the Parvoviridae, B19 is known to cause human disaese – erythema infectiosum (fifth disease), a common childhood exanthem.

Adenoviruses Adenoviruses were first isolated in 1953 in a human adenoid cell culture. Since then, approximatelly 100 serotypes, at 47 of which infect humans, have been recognized.

Adenovirus infections in human Adenoviruses infect epithelial cells of the pharynx, conjuctiva, small intestine, and occasionally other organ systems. They usually do not spread beyond the regional lymph nodes.

Adenovirus infections in humans Respiratory diseases acute febrile pharyngitis pharyngoconjuctival fever acute respiratory disease pneumonia Eye infections Gastrointestinal disease Other diseases acute hemorrhagis cystitis in children cervical lessions urethritis

Human herpesviruses Alphaherpesvirinae Betaherpesvirinae Herpes simplex type 1 Herpes simplex type 2 Varicella zoster virus Betaherpesvirinae Cytomegalovirus Human Herpes virus 6,7 Gammaherpesvirinae Epstein-Barr virus Kaposi´s sarcoma-related virus

Poxviruses Poxviruses are the largest and most complex of viruses. Infections with the most poxviruses are characterized by a rash, although lesions induced by some members of the family are markedly proliferative.

Poxviruses Poxviruses include the human viruses variolla (smallpox) and molluscum contagiosum poxvirus.