Which one of the following is true about catheter associated UTI?

(A) Most catheter associated UTI patients are symptomatic# Catheter associated urinary tract infections account for 40 percent of all nosocomial infections and is the most common source of gram-negative bacteremia in hospitalized patients> Diagnosis of catheter-associated urinary tract infection can be made when the urine culture shows 100 or more CFU per mL of urine from a catheterized patient.> Microbiology of catheter-associated urinary tract infections includes E. coli and Proteus, Enterococcus, Pseudomonas, Enterobacter, Serratia & Candida species> Risk factors: Prolonged catheterization >6 days Female gender Diabetes Malnutrition Azotemia (creatinine >2.0 mg/dL Ureteral stent Antimicrobial-drug therapy