Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
24 Cards in this Set
- Front
- Back
|
Chicken Pox Agent
|
Varicella zoster virus
Member of the herpes family Medium sized, enveloped dsDNA |
|
|
Chicken Pox Symptoms
|
Skin rash on head, face, and mouth
Sequella - reactivation as shingles Reye's Syndrome - vomiting and coma, liver and brain damage |
|
|
Chicken Pox Pathogenesis
|
Enters thru respiratory route
Moves to skin thru blood stream Infect and lyse cells Can remain in nerves Decline in cell mediated immunity yields shingles |
|
|
Chicken Pox Epidemiology
|
Spread thru resp. droplets and skin lesions
Incidence increases in winter and spring 2 weeks incubation, infective 1-2 days before rash until blisters scab over |
|
|
Chicken Pox Prev/Treat
|
Vaccine or antibody therapy for immunocompromised
|
|
|
Measles Agent
|
Rubeola virus, paramyxovirus family
Pleomorphic, medium sized, enveloped ssRNA 2 envelop projections. One for attachment, one for membrane fusion |
|
|
Chicken Pox Symptoms
|
Fever, runny nose, etc.
Fine rash spreading from forehead Disappears in 1 week Secondary infections - pneumonia and earaches. Encephalitis and subacute sclerosing panencephalitis in sever cases |
|
|
Chicken Pox Pathogenesis
|
Infects thru respiratory route
Replicates in epithelium Spreads to lymph nodes then to rest of body Mucus membranes covered with white spots - Koplik spots Rash due to replication and immune response |
|
|
Chicken Pox Epidemiology
|
Humans are only natural host
Spread thru droplets Rare in US but outbreaks still occur |
|
|
Chicken Pox Prev/Treat
|
Vaccine
No antivirals |
|
|
German Measles
|
Rubella virus
Togavirus family Smal, enveloped, ssRNA |
|
|
Chicken Pox Symptoms
|
Slight fever and cold symptoms
Enlarged lymph nodes behind ears and back of neck Faint light pink spot rash on face Adults complain of joint pain Usually last about 3 days |
|
|
Chicken Pox Pathogenesis
|
Enters thru respiratory route
Multiplies in nasopharanx then enters blood stream - viremia Transported to tissues Antibody-antigen complex causes rash and joint pain |
|
|
Chicken Pox Epidemiology
|
Humans are only natural host
Highly infectious but less than rubeola 40% are asymptomatic Infectious for a week before and after rash |
|
|
Chicken Pox Prev/Treat
|
Attenuated virus vaccine, given at 12 months then booster at 4-6 years
Dangerous to pregnant women |
|
|
Fifth Disease
|
Parvovirus B-19
Small, nonenveloped, ssDNA Infects certain bone marrow Can cause aplastic crisis |
|
|
Roseola
|
Herpes virus type 6
Common in young children Abrupt, high fever followed by rash, sometimes covulsions No vaccine, treatment to reduce fever |
|
|
Warts Agent
|
Papillomavirus
Papovirus family SMall, nonenveloped, dsDNA Can survive on fomites |
|
|
Warts Pathogenesis
|
Infects deeper cells of epidermis
Reproduces inside cell nucleus Infected cell grows abnormally 2-18 month incubation |
|
|
Wart Treatment
|
Killing abnormal cells
Freezing, cauterizing, surgical removal |
|
|
Superficial Cutaneous Mycoses Agent
|
Epidermophyton
Microsporum Trichophyton Known collectively as dermatophytes |
|
|
Superficial Cutaneous Mycoses Symptoms
|
Itching
Odor Rash Some show no symptoms |
|
|
Superficial Cutaneous Mycoses Pathogenesis
|
Skin is normally resistant
Excess moisture allows invasion of keratinized tissue Keratinase - metabolizes keratin Difuse to dermal layer and evoke immune response |
|
|
Superficial Cutaneous Mycoses Prev/Treat
|
Attention to cleanliness
Keeping dry OTC medications |
