Explain why is each of these is often resistant to disinfectants.

MICRO-BIOLOGY QUESTION

4 questions, about 2 pages response

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be sure to back up each statement of fact with cited sources. Your response to each question should be at least 125 words.

1. Explain why is each of these is often resistant to disinfectants.

Mycobacterium

Pseudomonas

Bacillus

Entamoeba histolytica and Giardia lamblia were isolated from the stool sample of a 45- year- old man, and Shigella sonnei was isolated from the stool sample of an 18- year- old woman. Both patients experienced diarrhea and severe abdominal cramps, and prior to onset of digestive symptoms both had been treated by the same chiropractor. The chiropractor had administered colonic irrigations (enemas) to these patients. The device used for this treatment was a gravity- dependent apparatus using 12 liters of tap water. There were no check valves to prevent backflow, so all parts of the apparatus could have become contaminated with feces during each colonic treatment. The chiropractor provided colonic treatment to four or five patients per day. Between patients, the adaptor piece that is inserted into the rectum was placed in a “hot- water sterilizer.” What two errors were made by the chiropractor?

Between March 9 and April 12, five chronic peritoneal dialysis patients at one hospital became infected with Pseudomonas aeruginosa. Four patients developed peritonitis (inflammation of the abdominal cavity), and one developed a skin infection at the catheter insertion site. All patients with peritonitis had low- grade fever, cloudy peritoneal fluid, and abdominal pain. All patients had permanent indwelling peritoneal catheters, which the nurse wiped with gauze that had been soaked with an iodophor solution each time the catheter was connected to or disconnected from the machine tubing. Aliquots of the iodophor were transferred from stock bottles to small in- use bottles. Cultures from the dialysate concentrate and the internal areas of the dialysis machines were negative; iodophor from a small in- use plastic container yielded a pure culture of P….

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