UTIs Flashcards
Cystitis definition
Inflammation of the bladder (rare in males d/t longer urethra)
Urethritis definition
inflammation of the urethra, with frequent dysuria. Usually associated with STDs
Pyelonephritis definition
Inflammation of the kidneys nd the renal pelvis, with flank pain and tenderness, bacteria, pyuria and fever
Prostatitis definition
Inflammation of the prostate
Bacteriuria definition
Presence of bacteria in the urine
Relapse of UTI
- Primarily seen after a kidney infection
- Same organism that was present in the previous infection
- Onset: w/in 2 weeks after completion of therapy
- Causes: inadequate initial therapy, prostatic tissue involvement (men), renal tissue involvement, structural abnormality
Reinfection of UTI
- Primarily seen with lower tract infections
- Different organisms
- Onset: several weeks to months after therapy
- Causes: vaginal colonization with organisms from the intestinal tract, other hygienic concerns
Common pathogens that cause UTIs
E. coli (most common)
Proteus mirabilis
Klebsiella pneumoniae
Staphylococcus saprophyticus (particularly in young, sexually active females)
Predisposing factors for UTIs
Instrumentation Obstruction to free flow of urine Difficulty evacuating the bladder Females Pregnancy Sexual intercourse Decrease in host resistance: DM, cancer, chronic steroid use
Ways to diagnose UTIs
UA
Culture and sensitivity testing
UA
Pyuria and bacterial colony count of > 1000 bactera/ml of urine
Leukocyte esterase dipstick test
Nitrate assay test
Color, specific gravity, pH, glucose, protein, blood
Culture and sensitivity testing
Midstream clean catch specimen (preferred method)
Catheterization
Suprapubic bladder aspiration
Blood cultures
Clinical presentation of cystitis
Dysuria
Frequency
Urgency
Suprapubic pain
Acute uncomplicated cystitis common organisms
E. coli
S. saprophyticus
Acute uncomplicated cystitis treatment
Bactrim x 3 days
Nitrofurantoin x 5 days (avoid if pyelonephritis suspected)
FQs x 3 days (levo and cipro only)
Fosfomycin x 1 dose (avoid if pyelonephritis suspected)
Beta lactams x 3-7 days (cefdinir, cefaclor, cefpoxidime, augmentin)