UTI - Block 2 Flashcards
What are the dosage forms of Nitrofurantoin?
Macrocrystals: Macrodantin
Monohydrate: MicroBid
ADRs of Nitrofurantoin?
Urine discoloration, N/V, pulmonary fibrosis, eosinophilia
CI: CrCl <30
ADRs of Bactrim? CI?
- Drug-induced thrombocytopenia
- Hyperkalemia
CI: Dofetilide, warfarin, sulf allergy
BBW of FQs?
- Tendon rupture, peripheral neuropathy, CNS effects
- Muscle weakness
- QT prolongation
What are the most common pathogens that cause UTIs?
Klebsiella
E. coli
Entercoccus
Proteus
Staph. saprophyticus
Antibotic resistant organisms that may cause UTIs?
- VRE
- ESBL producing E. coli
- AmpC and carbapenemase production of E coli
Infection of the bladder?
Cystitis
Infection of the kidneys?
Pyelonephritis
Presence of microbes in the urinary tract?
Bacteriuria
Bacteriuria w/o sx of infection
Asymptomatic bacteriuria (ASB): ≥10^5 CFU/mL w/o sx
Acute infection of the prostate
Prostatitis
Inflammation, swelling and irritation of the urethra
Urethritis
Sign of infection, positive leukocyte esterase?
Pyuria
Pain and burning upon urination?
Dysuria
Organelles of adhesion allowing bacteria to colonize environmental surfaces or cells and resist flushing?
Bacterial fimbriae/pili
Urine is forced up ureters into kidneys
Vesicoureteral reflux
What are the host defense mechanism used to prevent UTIs?
- Length of urethat tract (males have longer)
- Low urinary pH
- High urea concentration
- Prostatic secretion
- Voiding expels bacteria that colonize in the urethra
What is the difference between upper and lower UTI?
Upper: Pyelonephritis infects the kidneys
Lower: Cystitis doesn’t involve the kidney (e.g. urethra, bladder)
What are the characterisitcs for uncomplicated UTI?
- Acute, sporadic, recurrent infection
- Premenopausal femals
- No anatomical/functional abnormalities
- Normal, healthy
What is considered a complicated UTI?
- Men
- Pregnancy
- Obstrution of urinary tract
- Foreign body
- Incomplete voiding
- Diabetes
- Vesicoureteral refulx
- Immunosupression
- Hx of instrumentation
- Health care associated infection
What are the RF of UTIs?
- Females
- Pregancy
- Diabetes
- Seniors
- Dysfunctional lower UT
- Urinary incontinence
- Obesity
- Neurologic conditions
- Poor pesonal hygiene
- Males with BPH
Presentations of cystitis?
- Urinary urgency
- Urinary frequency
- Dysuria
- Nocturia
- Suprapubic pain
- Hematuria
Presentations of pyelonephritis?
- Fever
- Flank pain
- Chills
- N/V
- Costovertebral angle tenderness
What is the difference between urine analysis and cultrue?
Culture: looks for microbes
Analysis: used for uncomplicated cystitis outpatient
What are the lab results of UTIs?
- Urine culture (Gold standard)
- Pyuria
- Hematuria
- Bacteriuria
- Leukocyte esterase +
- Nitrite + (w/ nitrite reducers)
How is uncomplicated cystitis normally diagnosed?
Hx and s/s of infection
How do we diagnose complicated/recurrent infection?
Culture/sensitivity
Should urine cultures be used for uncomplicated cystitis?
No, but can use urinalysis
OTC product used for UTI? Counseling
Phenazopyridine HCl (urinary analgesic)
1. Treats the sx not the infection
2. Only used for 1-2 days with ABX
3. Red-orange discoloration that may stain contacts and urine
Non-pharm for UTI?
- Increase fluid intake
- Complete voiding
- Cranberry products
Which of the following organisms is most likely responsible for a UTI in a novel, uncomplicated infection?
E. coli
Who are more susceptible to MDR G- UTI?
- MDR G- or FQ resistant-PA isolates
- Inpatient
- Use of FQ, Bactrim, of broad-spec b-lactam
- Travel to high prevalence areas
UTIs are best treated after categorizing the infection, assign MOA of infection with corresponding ABX?
Filtration depends on size and PPB: Sulfonamides, Nitrofurantoin, AG
Actively secreted into urine: b-lactams and FQ
What is the first line for acute uncomplicated cystitis?
- Nitrofurantoin 100 mg BID x 5days
- Bactrim DS (avoided IF resistance exceeds 20%) 1 tabl BID for 3 days
- Fosfomycin 3 g once
Alt tx for acute uncomplicated cystitis?
- FQ (Cipro and Levo) -> more serious infection and resistant strains -> Don’t use mox or gemi
- Augmentin -> Don’t use amoxicillin or ampicillin empirically
What is the first line tx for outpatient complicated UTI including mild/moderate pyelonephritis?
Cipro and Levo
What is tx for outpatient complicated UTI including mild/moderate pyelonephritis is patient has FQ resistance >10% from E. coli?
Ceftriaxone, ertapenem, gent/tobra -> followed by FQ
What is the tx for outpatient complicated UTI including mild/moderate pyelonephritis in patients with FQ allergy?
Cetriaxone, ertapenen, gent/tobra -> followed by Bactrim or Augmentin
What is the tx for outpatient complicated UTI including mild/moderate pyelonephritis in patients with MDR?
Ertabenem
What is the first line tx for inpatient complicated UTI (severe)?
Ceftriaxone IV
Alt: Cipro or Levo IV
What is the tx for inpatient complicated UTI (severe) in patient with MDR risk??
- Cefepime (anti-pseudomonal)
- Piperacillin/tazobactam (anti-pseudomonal)
- Meropenem (if recent ESBL isolate)
- Imipenem (if recent ESBL isolate)
Tx for UTIs in pregnancy? Alt?
First-line: amoxicillin, Augmentin, cephalexin
Alt: Nitrofurantoin and Sulfonamides (avoid in 1st and 3rd trimester)
Treatment for 5-7 days
ABX avoided in pregnancy?
- Tetracycline
- FQ
Presentations of UTIs in elderly?
- Altered mental status
- Change in eating habits
- GI sx
Modifiable RF for UTI in catherized patients?
- Method and duration of catheterization
- Catheter system
- Care of system
- Technique of HC personnel inserting the catheter
What patient populations do you screen for aysmptomatic bacteriuria?
- Pregnancy
- Patients undergoing urological procedures:
* Cytoscopy
* Ureteroscopy
* Nephroscopy
* Urethrethroscopy
* Removal of tissue, tumors, and stones
What is the pharm tx for ASB?
Non unless pregnant for 5-7 days:
1. Amoxicillin
2. Cephalexin
What are the common pathogens associated with prostatitis?
- Chlamydia trachomatis
- Ureaplasma urealyticum
- Mycoplasma hominis
What is the time cut-off for acute prostatitis?
> 3 months
What are RF for bacterial prostatitis?
- Prolonged urinary catheterization
- BPH
What are the sx of prostatitis?
- Fever
- Malaise
- Dysuria
- Urinary frequency/hesitancy
- Pelvic pain
Physical exam of prostatitis?
Enlarged prostate and tender to palpitation
Tx for actute prostatitis?
- Bactrim
- Cipro
- Levo
For 2-4 wks
Tx for chronic bacterial prostatitis?
FQ (Cipro and Levo) for 4-6 wks