Pig-Pen went to medical school
There's another paper just recently published on contamination of white coats. This study from Nigeria cultured the white coats of 103 doctors. Pathogens were cultured from nearly half (48%) of the coats. Staph. aureus was found on 19% of the coats, Pseudomonas aeruginosa on 10%, and other gram-negative organisms were found on 19%. The authors of the paper made a number of recommendations regarding the white coat, including frequency of laundering. Unfortunately, they left out the most important one--just get rid of them!