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martes, 21 de julio de 2015

West Nile Virus

emDocs

emDocs - July 21, 2015 - By Long B - Edited by Koyfman A and Alerhand S
"A patient presents to a Texas ED with reports of severe headache, myalgias, and ascending weakness. She has no past medical history. Over the last several days, she has experienced difficulty concentrating, a gradually worsening headache, diffuse aches, and trouble getting up from a seated position.
Your exam reveals normal vital signs. Neurologic exam reveals decreased reflexes in the lower extremities with +3/5 strength. The rest of your exam is normal. Due to concern for Guillain–Barré syndrome (GBS), cerebral spinal fluid (CSF) is obtained, revealing elevated protein and lymphocytes, but negative RBCs. What should you consider with this presentation?
Introduction
West Nile Virus (WNV) is a flavivirus, spread by the bite of female Culex mosquitoes. The virus is predominantly in temperate and tropical regions. This RNA virus is widely distributed, with birds as the host where the virus primarily amplifies. Humans are dead-end hosts."
transmission cycle
http://www.emdocs.net/west-nile-virus-an-update-with-pearls-and-pitfalls/