In One Hospital,Pseudomonas Aeruginosa Serotype 10 Infected the Biliary Tract

In one hospital,Pseudomonas aeruginosa serotype 10 infected the biliary tract of 10 percent of 1300 patients who underwent gastrointestinal endoscopic procedures.After each use,endoscopes were washed with an automatic reprocessor that flushed detergent and glutaraldehyde through the endoscopes,followed by a tap water rinse.P.aeruginosa serotype 10 was not isolated from the detergent,glutaraldehyde,or tap water.What was the source of the infections?

A) bacterial cell walls in the water
B) a biofilm in the reprocessor
C) contaminated disinfectant
D) fecal contamination of the bile ducts
E) None of the answers is correct.

Correct Answer:

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