UTI Flashcards
Classification of UTIs
lower and upper
Define Lower UTI
infection of the bladder (cystitis)
Define Upper UTI
infection involving the kidneys (pyelonnephritis)
Uncomplicated UTI
no structural or functional abnormalities
Complicated UTI
Predisposing lesion of the urinary tract- congenital abnormality or distortion of urinary tract, stone, indwelling catheter, prostatic hypertrophy, obstruction or neurological deficit that interferes with normal urinary flow
What types of UTI can males have?
males only have complicated
Predisposing Factors
Age
Gender
Pregnancy
Use of Spermicides and diaphragms
Instrumentation of urinary system
Urinary tract obstruction- including drugs like anticholinergics
Incomplete bladder emptying
Neurologic dysfunction – stroke, diabetes, spinal cord injury
Vesicoureteral reflux
Renal disease
Which organisms most commonly cause UTI?
S. pneumoniae
S. aureus
E. coli
Enterococcus species
Pseudomonas aeruginosa
What is the most common etiology in uncomplicated UTI?
E.coli 80%
What are other common etiology in uncomplicated UTI?
Staph saprophyticus, K. pneumoniae, Proteus spp., Enterococcus spp.
What are etiology in complicated UTI?
E.coli 50%
Staph saprophyticus, K. pneumoniae, Proteus spp., Enterococcus spp.
How to diagnosis UTI?
urinalysis - bacteriuria and pyuria
urine culture
you have to have enough in the urine to get the diagnosis
Tests for urine dipsticks
for nitrite
- not all bacteria convert nitrates to nitrites
for leukocyte esterase
- esterase activity for WBC
Clinical Presentation lower UTIs
dysuria, urgency, frequency, nocturia, suprapublic heaviness/pain, gross hematuria
Clinical Presentation upper UTIs
flank pain, fever nausea, vomiting, malaise, costovertebral tenderness
What to consider for treatment for UTIs?
Site of infection – cystitis vs pyelonephritis
Renal function
Causative organism
Concurrent disease
Ability to penetrate urine or kidneys
Drug interactions
Adverse effects and allergies
cost
What is the first line for UTI uncomplicated?
TMP/SMX
TMP
nitrofurantoin
Which antibiotic is hepatic metabolized?
erythromycin
What antibiotics hepatically eliminated?
moxifloxacin
How long is nitrofuratoin used for?
5 days
what is the dose for TMP/SMX for uncomplicated UTI
1 DS bid for 3 days
What is the dose for TMP for uncomplicated UTI?
100 mg BID
200 mg daily
for 3 days
What are some alt for first line uncomplicated UTI?
cephalexin
fosfomycin
What is the dose for cephalexin for uncomplicated UTI?
250 mg QID for 7 days
What is the dose for fosfomycin for uncomplicated UTI?
3 g single dose
What is the second line for uncomplicated UTI?
amoxicillin
norfloxacin
ciprofloxacin
What is the dose for amoxicillin for uncomplicated UTI?
500 mg TID for 3-7 days
875 mg BID for 3-7 days
What is the dose for norfloxacin for uncomplicated UTI?
400 mg BID for 3 days
What is the dose for ciprofloxacin for uncomplicated UTI?
250 mg BID
500 mg ER daily
for 3 days
What is factors looked at treatment of recurrence?
Culture
Re-assess for upper tract infection
Re-treat for 7 to 14 days
Same antibiotic choices, however tailor based on C&S
Define frequent recurrences
short course self treatment at onset of symptoms if less than 3 infections per year