Monday, May 21, 2018

Case of the Week 495

This week's case was donated by Dr. Kamran Kadkhoda. It's a 'real life' case that I thought provided a fun challenge. The specimen was obtained from a 5 year old boy from Canada and submitted to the laboratory for identification. What do you all think?

9 comments:

Blaine Mathison said...

Ixodes sp. The anal groove is visible and festoons are absent, even though all other confirmatory features would not be visible due to condition (mouthparts; absence of eyes; color of scutum).
I had an Amblyomma nymph this morning in a similar condition!

Idzi P. said...

Definitely an arthropod (tick)! Anal groove goes “completely over” anus, so I’d also go for ixodes sp.
Too bad we don’t have a picture from its back, to check for a “shield” etc...
This is what one typically gets in the lab! Horribly damaged, usually due to “wrong” or “bad” removal procedure.

Sheldon Campbell said...

What Blaine said.

Anonymous said...

The inverted V shape anal groove is anterior to the anus. This allows us to identify the tick as an Ixodes so. Lack of the dorsal aspect as well as dismembered legs prevent us to say whether this is a male or female tick and the growth stage.
Florida Fan

Richard Pollack said...

Ixodes spp. If recently encountered in Canada, then most likely an adult female or nymphal blacklegged tick (I. scapularis = I. dammini). An image of the dorsum and some indication of size would help add assurance.

Richard Pollack said...

Actually, it is a female.

Agnes Kurniawan said...

That's a tick, Ixodes sp

Ellen said...

Ixodes scapularis female (I. pacificus if it is from far Western Canada), happily unengorged. The orange color is a good character determining sex (males are black), stage (nymphs are sort of transparent charcoal grey) and engorgement (she grows new opisthosoma tissue in order to engorge andbecomes grayish/whitish). Lack of festoons and anal groove like an upside down horseshoe = genus Ixodes.

William Sears said...

brown legs, depression around anal pore. Ixodes sp.