Tuesday, August 9, 2016

Case of the Week 408

This week's case was generously donated by Dr. Carlos Chaccour. The patient is a young girl living in a rural region of  Venezuela who presented with a painful "pustule" on the back of her left thigh. The lesion had been present for the past four weeks.

Here is a video of the lesion:

Shortly after applying an occlusive ointment (in this case, soap paste), the parasite was easily removed from the wound:






Here is a closer view of the spines and mouthparts. 


Identification?

7 comments:

Vijai Bhola said...

Human Bot fly. Dermatobia Hominis

Jon said...

Dermatobia hominis, 3rd instar.

Anonymous said...

Yeah, a live one finally. Jon how did you get the growth stage? For sure I have to agree with you guys as insect identification is my Achille's tendon.

Jon said...

The three instars have distinct shapes. Here is a good summary from the U of FL Dept. of Entomology and Nematology:
http://entnemdept.ufl.edu/creatures/misc/flies/human_bot_fly.htm

Anonymous said...

Jon,
Thank you very much for the info. I will look at it and invites my team to do the same.

Florida Fank

Kathy Murray Leisure, MD said...

Botfly larva stages (instars) and pictures are also awesome on the Entomology University of Florida link above. Thanks!!!

William Sears said...

dermatobium hominis