Case of the Week 453

This week ' s case was kindly donated by one of my former Clinical Microbiology fellows, Dr. Adam Caulfield. The specimen (shown below) was extracted from the leg of a 70 year old man who had recently returned from a trip to Costa Rica. It measures approximately 1.5 cm in length. Identification?
Source: Creepy Dreadful Wonderful Parasites - Category: Parasitology Source Type: blogs