other intestinal aerobes
Bacterial colonisation of long term indwelling catheters is very common.
Antimicrobial therapy is not indicated unless the patient has evidence of systemic infection e.g. pyrexia, loin pain, raised white cell count or acute confusion in the elderly.
Smelly or cloudy urine, bacteriuria without systemic symptoms, or catheter blockage are not indications for antimicrobials.
Take urine sample (and blood culture if pyrexial) and commence antibiotic therapy (consider previous microbiology sensitivity results if available).
Remove and replace urinary catheter (if still required) following 1st or 2nd dose of antibiotics.