Contamination from unwashed surgical gloves.
D003581:Cytodiagnosis; D005932:Gloves, Surgical; D006801:Humans; D008859:Microscopy, Polarization; D009061:Mouth Mucosa / Q000473:pathology*; D011208:Powders; D013213:Starch / Q000302:isolation & purification*
D011208:Powders; D013213:Starch