WBR0084

Author	PageAuthor::Kalsang Dolma
Exam Type	ExamType::USMLE Step 1
Main Category	MainCategory::Microbiology
Sub Category	SubCategory::General Principles
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
Keyword
Linked Question	Linked::
Order in Linked Questions	LinkedOrder::