UTI in Adults (no fever or flank pan)

Treat women with severe/or ≥ 3 symptoms;

women mild/or ≤ 2 symptoms AND

Urine NOT cloudy 97% negative predictive value, do not treat unless other risk factors for infection. If cloudy urine use dipstick to guide treatment. Nitrite plus blood or leucocytes has 92% positive predictive value; nitrite, leucocytes, blood all negative 76% Negative Predictive Value (NPV).

Consider a back-up / delayed antibiotic option.

Men: Consider prostatitis and send pre-treatment MSU OR if symptoms mild/non-specific, use negative dipstick to exclude UTI.

Always safety net.

First line: nitrofurantoin if GFR over 45ml/min.

GFR 30-45: only use if resistance & no alternative.

In treatment failure: always perform culture.

 

People > 65 years: do not treat asymptomatic bacteriuria; it is common but is not associated with increased morbidity.

Catheter in situ: antibiotics will not eradicate asymptomatic bacteriuria; only treat if systemically unwell or pyelonephritis likely. Do not use prophylactic antibiotics for catheter changes unless history of catheter-change-associated UTI or trauma (NICE, SIGN).

Nitrofurantoin

100mg m/r BD

Women all ages 3 days

Men 7 days

Trimethoprim

200mg BD

ALL:

Women all ages 3 days

Men 7 days

Pivmecillinam (400mg if resistance risk)

200mg TDS

(400mg TDS)

ALL:

Women all ages 3 days

Men 7 days

If organism susceptible: amoxicillin

500mg TDS

ALL:

Women all ages 3 days

Men 7 days

Use nitrofurantoin first line as general resistance and community multi-resistant. Extended-spectrum Beta-lactamase E. coli are increasing. Trimethoprim (if low risk of resistance) and pivmecillinam are alternative first line agents.

Risk factors for increased resistance include: care home resident, recurrent UTI, hospitalisation >7d in the last 6 months, unresolving urinary symptoms, recent travel to a country with increased antimicrobial resistance (outside Northern Europe and Australasia) especially health related, previous known UTI resistant to trimethoprim, cephalosporins or quinolones.

If increased resistance risk, send culture for susceptibility testing & give safety net advice. If GFR​<45 ml/min or elderly consider pivmecillinam 400mg TDS or fosfomycin (3g stat in women plus 2nd 3g dose in men 3 days later).