WBR0084

Author	PageAuthor::Kalsang Dolma
Exam Type	ExamType::USMLE Step 1
Main Category	MainCategory::General Principles
Sub Category	SubCategory::Microbiology
Prompt	[[Prompt::A 28 year old female immigrant from Africa presents with complaints of an itchy swelling over her entire body. She is also concerned about body aches. On physical examination, non-tender swelling is noted over her the limbs on the right side of her body.Laboratory findings show eosinophilia. Microscopic examination of the blood shows the microfilaria of loa loa, and a diagnosis of loa loa filiariasis is made. The vector for this condition is:]]
Answer A	AnswerA::Black fly
Answer A Explanation	AnswerAExp::The black fly is the vector for Onchocerciasis.
Answer B	AnswerB::Soft tick
Answer B Explanation	AnswerBExp::The soft tick is a vector for relapsing fever.
Answer C	AnswerC::Hard tick
Answer C Explanation	AnswerCExp::The hard tick is a vector for lyme diseae, rocky mountain spotted fever, babesiosis, ehrlichiosis, tick-borne meningoencephalitis, colorado tick fever, Crimean-Congo hemorrhagic fever, and tick paralysis.
Answer D	AnswerD::The genus Chrysops
Answer D Explanation	AnswerDExp::This is the correct answer. The vector for loa loa filariasis are flies from two species of the genus Chrysops; C. silacea and C. dimidiata.
Answer E	AnswerE::
Answer E Explanation	AnswerEExp::
Right Answer	RightAnswer::D
Explanation	[[Explanation::The correct answer is D. The vectors for loa loa filiaris are flies from the genus Chrysops. Loa loa filariasis is a skin and eye disease caused by the nematode worms called loa loa filaria. The diagnosis of loa loa filiarisis should be considered in any patient with a history of travel in an endemic area who presents with worms in their eyes, swollen lumps of tissue, itching, swelling, and unexplained peripheral eosinophilia. Educational Objective: References: ]]
Approved	Approved::Yes
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