This week's case is a little tricky. We received the following fly larva from a patient living in the upper midwestern United States. No additional information was provided. Based on the images, how would you sign this case out? Would you request any additional information?
4 comments:
Lucilia sericata? Perhaps request underlying conditions and infectious status. /Patrik
Wohlfahrtia?
-HLCM
“Errare humanum est”! Besides the known human agents of myasis, my knowledge on fly larvae is nul. After consulting a bunch of literatures I believe the larva resemble Phormia species with pro thoracic spiracle having more than ten openings.
Florida Fan
This is an L2 larva, as there are only two slits. This makes ID very challenging. The cute hand-with-too-many-fingers-like anterior spiracles make me believe that this is a larvae from the family Calliphoridae (Calliphora sp. or Lucilia sp.), causing facultative myiasis. If we could get a top-down image of the oral hooks, we could try to look for what is called the "accessory oral sclerite", which helps differentiating between Calliphora sp. and Lucilia sp. (blue/green bottle flies).
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