Case 237. Panel 3: Contamination of non-pathogenic microbes

　 　 　 　
　
Mites seen at the edge of tissue in a paraffin section (HE).
 　
　 　 　 　

　

 　 The formalin-fixed breast specimen was incidentally drop down into the housedust in the drawer. Numerous housedust mites are attached at the periphery of the material.