Microscopy

A

A: Sarcoptes scabei mite.  Females are 0.3 to 0.4 mm long and 0.25 to 0.35 mm wide.  Males are slightly more than half that size.
This image is from an unknown source.

B

B: Scabies lesions are caused by Sarcoptes scabei burrowing under the skin.  A typical location is on the hands, particularly the webbing between the fingers, as shown in this image.

C

C: Cross-sectional view of the burrows created in the epithelium by Sarcoptes scabei.