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CH19 L7 (Warts (benign epitheleal growths on the skin or mucous membranes,…
CH19 L7
Warts
benign epitheleal growths on the skin or mucous membranes
forms on any body surfaces
papillomarvirus causes warts
some strains trigger oncogenes in host chromosomes
wart develop several months after infection
wart are harmless
transmitted via direct contact
DX- observation
various techniques to remove warts
Herpes infections
slow spreading skin lesions
recurrence of lesions is common
caused by human herpesviruses 1 and 2
produce various proteins that act as virulence factors
painful lesions caused by inflammation and cell death
fusion of infected cells form syncytia
dx- presence of lesions
HCW should wear gloves to limit exposure
Poxivirus
poxivirus and DNA viruses
produce various proteins that interfere with the immune response
Smallpox infection occurs by inhalation of virus
spread from the resp. tract throughout the body
variola virus stocks are maintained
monkeypox cases have increased
tx- immediate vaccination
some military and healthcare personnel are vaccinated
Chicken pox
highly contagious
characterized by lesions on the back and trunk that spread across body
sensory nerves
shingles
reactivation of the virus
lesions are localized to skin along an infected nerve
pain may last after lesions have healed
risk of shingles increases with age
more severe in adults
occurs mostly in children