UTI and Urgent Care Medicine

Flashcards covering key concepts about urinary tract infections, their diagnosis, treatment, and prevention based on the provided lecture notes.

What should you be able to do by the end of the presentation on urinary tract infections (UTIs)?

Differentiate types of UTIs, identify common organisms, name antibiotics used, identify organisms causing urethritis, and unique aspects of treating UTIs in children and pregnant females.

What is the classic definition of a UTI?

Significant bacteria, which was traditionally defined as 10^5 colony forming units per ml in the presence of symptoms, but now lower counts are recognized.

What is the most common organism causing UTIs?

E. Coli.

What is a risk factor for urinary tract infections in women?

Sexual activity, due to anatomical issues such as a shorter urethra.

What percentage of women will have at least one UTI in their lifetime?

40 to 50 percent.

What are common symptoms of a UTI?

Frequency, urgency, dysuria, and possibly hematuria.

How do you make a diagnosis for a UTI?

Clinically based on symptoms and bedside testing including urine dipsticks for leukocyte esterase and nitrites.

What is asymptomatic bacteriuria?

Bacteria in the urine without symptoms, generally not treated except in pregnancy.

What antibiotic is recommended for uncomplicated UTIs?

Trimethoprim-sulfamethoxazole (Bactrim) if local resistance is low.

What increases the risk of UTIs in pregnant women?

Anatomical changes such as increased bladder volume and decreased bladder tone.

What is the treatment for uncomplicated pyelonephritis?

Outpatient with oral antibiotics if the patient is nontoxic and can tolerate PO.

What is a key aspect of preventing recurrent UTIs?

Voiding immediately before and after sexual intercourse.

What distinguishes urethritis from cystitis in terms of symptoms?

Urethritis often presents with urethral discharge, whereas cystitis does not.

What is the treatment for gonococcal urethritis?

Ceftriaxone plus azithromycin or doxycycline as alternatives.

What should children with a UTI under the age of five undergo?

A workup that includes a renal ultrasound and possibly voiding cystourethrogram.

Why are bagged urines not recommended for diagnosing UTIs in children?

They can result in mixed flora and lead to ineffective or inappropriate antibiotic treatment.

What are some common organisms causing urethritis?

Chlamydia trachomatis, Neisseria gonorrhoeae, Ureaplasma, Mycoplasma.

What treatment is indicated for complicated UTIs?

Address the underlying issue, such as a kidney stone, and administer antibiotics for 7-10 days.

What is the first-line antibiotic for uncomplicated UTIs?

Trimethoprim/sulfamethoxazole is often the first-line antibiotic for treating uncomplicated UTIs.

What is the mechanism of action for nitrofurantoin?

Nitrofurantoin works by inhibiting bacterial enzymes and disrupting cell wall synthesis in bacteria.

What are the common side effects of ciprofloxacin?

Common side effects include nausea, diarrhea, dizziness, and increased risk of tendon rupture.

When is fosfomycin typically prescribed?

Fosfomycin is often used for uncomplicated cystitis and is given as a single-dose treatment.

How does amoxicillin work against UTIs?

Amoxicillin is a penicillin antibiotic that inhibits bacterial cell wall synthesis, leading to cell lysis.

What is a major concern in prescribing fluoroquinolones for UTIs?

Concerns include increasing resistance rates and potential side effects such as tendon damage.

What is the appropriate duration for treating uncomplicated UTIs with antibiotics?

For uncomplicated UTIs, a typical duration is 3 to 7 days, depending on the antibiotic.

What is the role of phenazopyridine in UTI treatment?

Phenazopyridine is a urinary analgesic that alleviates discomfort but does not treat the infection.

What is the mechanism of action of fosfomycin?

Fosfomycin inhibits bacterial cell wall synthesis by blocking the enzyme MurA.

When might a culture and sensitivity test be necessary for UTIs?

A culture and sensitivity test is necessary if the UTI is recurrent or complicated, to guide appropriate antibiotic choice.

What is a common alternative antibiotic for patients allergic to penicillin?

Ciprofloxacin or nitrofurantoin may be considered for patients with a penicillin allergy.

What factors influence antibiotic choice for treating a UTI?

Factors include the patient's allergy history, local resistance patterns, and the specific bacteria causing the infection.

Why are broad-spectrum antibiotics used in some UTI cases?

Broad-spectrum antibiotics may be used initially to cover a wide range of potential pathogens until culture results are available.

What precautions should be taken when prescribing antibiotics to pregnant women for UTIs?

Generally safe antibiotics, like nitrofurantoin or amoxicillin, should be selected, avoiding those contraindicated in pregnancy.

What is a potential adverse effect of long-term nitrofurantoin use?

Long-term use of nitrofurantoin can lead to pulmonary toxicity or peripheral neuropathy.