Infestations Flashcards
(17 cards)
Which sphirochaete causes lyme disease?
Borrelia burgdorferi
What are the three stages of lyme disease?
Erythema chronicum migrans
Borrelia lymphocytoma
Acrodermatitis chronica atrophicans
When does ECM occur following a tick bite?
Within a month
How does ECM in lyme disease present?
Expanding solitary macule/annular lesion
Resolves within a month untreated
How long after the initial tick bite does borrelia lymphocytoma occur?
6 months
What are the cutaneous signs and symptoms of borrelia lymphocytoma?
Firm, bluish red swelling
Ear lobes of kids/nipples of adults
Tender local lymphadenopathy
What are the clinical signs and symptoms of acrodermatitis chronica atrophicans?
Blue/red discolouration progressing onto atrophy
How long after the tick bite does acrodermatitis chronica atrophicans present?
6.5-8 years
How can lyme disease be prevented?
Tick repellant
Early removal of tick
Doxy 200mg within 72 hours of bite
What reaction occurs in 15% of people being treated for lyme disease?
Jarisch-Herxhemier
What causes scabies?
Sarcoptes scabei
How does scabies present?
Asymptomatic for up to 6 weeks
Delayed hypersensitivity reaction then develops
Biggggg itch
What can be seen on examination of scabies?
Burrows on fingers/wrists
Mites in burrows
Excoriations, vesicles, papules, scabetic nodules
How is scabies investigated?
Extractoin of mite, scrapings + microscopy
How is scabies treated?
Permethrin cream
How is head lice treated?
Physical removal
Malathion cream
How long after infection do symptoms arise with head lice?
up to 2 weeks
