SM_262a: Bugs and Parasites Flashcards
KOH is preparation is used to ___
KOH is preparation is used to diagnose skin infections
This is ____
This is tinea corporis
(branching septate hyphae)
This is ____
This is tinea capitis
This is ____
This is tinea versicolor
(spaghetti and meatballs)
This is ____
This is herpesvirus infection
(multinucleated giant cells on Tzanck smear)
This is ____
This is scabies
Scabies is a ____ infestation caused by ____ that is preferentially distributed to the ____ warm areas of the body
Scabies is a superficial parasitic skin infestation caused by the mite Sarcoptes scabiei that is preferentially distributed to the warm areas of the body
Scabies is usually transmitted by _____
Scabies is usually transmitted by skin-to-skin contact
Scrotal nodules are ____
Scrotal nodules are scabies unless proven otherwise
Scabies ____ may or may not be seen
Scabies scaly linear burrows may or may not be seen
Scabies life cycle involves ____
Scabies life cycle involves female mite burrowing into top layers of skin and laying eggs
(development from egg to adult mite in 10-14 days)
Norwegian scabies has ____ and ____ mites
Norwegian scabies has crusted presentation with thick scaly plaques over most of body and a ton of mites
(often misdiagnosed as psoriasis)
Scabies necessitates treatment of patient and ____
Scabies necessitates treatment of patient and all close contacts
(treated with topical such as permethrin, less frequently transmitted by indirect contact through fomites such as infested bedding or clothing)
Body lice can spread ____
Body lice can spread epidemic typhus
Head lice necessitate ____
Head lice necessitate physical removal
Crab lice are found in the ____
Crab lice are found in the pubic area
Ixodes tick transmits ____
Ixodes tick transmits Lyme disease (Borrelia burgdorferi)
____ is classic presentation of Lyme disease
Erythema (chronica) migrans is classic presentation of Lyme disease
(initial erythematous macule / papule enlarges within days to form an expanding annular lesion with distinct red border and partially clearing)
Breakfast, lunch, and dinner sign is associated with ____
Breakfast, lunch, and dinner sign is associated with bedbugs
(occur on exposed sites such as face, neck, arms, and hands with 2-3 lesions in a row)
Bedbugs are hard to destroy because ____, ____, and ____
Bedbugs are hard to destroy because they reside in crevices of bedding / furniture / floors / walls, can travel long distances in search of a human host, and survive for 6-12 months without feeding
____ may appear at bedbug bite sites in sensitized individuals
Intensely pruritic papules / papular urticaria / vesicles or bullae may appear at bedbug bite sites in sensitized individuals
Avoid spread of bedbugs from hotels by ____
Avoid spread of bedbugs from hotels by not putting suitcase right next to bed
This is ____, which is caused by ____ and is prevented by ____
This is Tunga penetrans (Tungiasis), which is caused by chigoe flea burrowing into the skin and laying eggs and is prevented by wearing close-toed shoes in the tropics
This is ____, which is caused by ____ and is prevented by ____
This is myiasis, which is caused by parasitic ifnestation of the body of a live mammal by fly larvae (maggots) that grow inside the host while feeding on its tissue and is prevented by wearing hats/pants/long sleeved clothing in tropics
(bot fly)
