Urinary Tract Infection MCQ

1. The traditional (and highly specific) criterion for a positive urine culture from a “clean-catch” specimen is:

a) 1000 colonies/ml
b) Greater than 10,000 col/ml
c) Greater than 50,000 col/ml
d) Greater than 100,000 col/ml
e) Greater than 200,000 col/ml

2. Renal imaging is especially useful in patients with an acute urinary tract infection when:
a) The pathogen is E. coli
b) Fever persists for greater than 72 hours or more of appropriate antibiotic therapy
c) The urine culture has 10,000-50,000 col/ml
d) The patient presents with fever for 48 hours
e) Urine culture is positive, but blood cultures are negative

3. A 28 year old sexually active woman presents with a third episode of moderate dysuria with pyuria (>5 WBCs/hpf). The minimum urine culture colony count necessary to make a clinical diagnosis of the acute urethal syndrome is:
a) 100-1000 col/ml
b) Greater than 10,000 col/ml
c) Greater than 50,000 col/ml
d) Greater than 100,000 col/ml
e) Greater than 200,000 col/ml

4. A 5 year old boy presents with a history of recurrent urinary tract infections with right flank pain (usually E. coli) over the last few years. Each has been treated with a 3-10 day course of antibiotics with resulution of symptoms. The most likely cause of the UTIs is:
a) Medullary cystic disease
b) Autosomal recessive polycystic kidney disease
c) Congenital vesicoureteral reflux
d) Bladder-sphincter dysfunction
e) The Ask-Upmask kidney

5. A 30 year old symptomatic pregnant woman (approximately 4 months) is found to have pyuria with >100,000 col/ml of E. coli. If untreated, acute pyelonephritis at some time during the remainder of the pregnancy is likely in what percentage of patients:
a. None
b. Ten per cent
c) Twenty-five per cent
d) Fifty per cent
e) Greater than 75 per cent

Answers

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