Introduction

Objectives of this module By the end of the Urinary tract infections module you will be able to recognize the main infections of the male urinary and genital tract, distinguish a localized infection from a systemic one, order the appropriate initial tests, interpret a urine culture, identify situations that require hospital admission or urgent urological evaluation, and understand the principles of rational antibiotic use. This first lesson distinguishes localized UTI (cystitis) from systemic UTI.

Video lesson

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Video pending upload (embedded YouTube)

Summary

What is it?

A urinary tract infection is the invasion of the urinary tract by microorganisms capable of producing an inflammatory response and symptoms.

It is currently useful to distinguish between:

Localized UTI: infection limited to the lower urinary tract, essentially cystitis, without signs of systemic infection.
Systemic UTI: there is systemic involvement, which may include pyelonephritis, prostatitis, and urosepsis.

Typical presentation of cystitis

The patient usually presents with:

Dysuria.
Urinary frequency.
Urgency.
Suprapubic pain or discomfort.
Occasionally hematuria.

When to suspect systemic infection

The presence of fever, chills, flank pain, or deterioration of general condition should make you think of a systemic infection, not simple cystitis.

Most common microorganism

Escherichia coli is the main uropathogen. Other Enterobacterales and different microorganisms may also be found depending on patient characteristics.

Fundamental concept

Bacteriuria ≠ urinary tract infection. To speak of infection we must interpret symptoms + clinical context + microbiological studies together when they are indicated. Asymptomatic bacteriuria generally represents colonization and should not be treated routinely.

To remember

Dysuria + urinary frequency + urgency without fever → think of cystitis first.
Fever + chills + flank pain → think of systemic infection.

PDF

⬇ Download module guide (PDF)

Urinary tract infections — Guide for Medicine: uncomplicated and complicated UTI, pyelonephritis, prostatitis, epididymitis/orchitis, urethritis and STIs, urine culture interpretation, and rational antibiotic use (all 8 topics of the module in a single document).

Practical algorithm

Content pending upload The general algorithm for the whole module (patient with urinary symptoms → localized vs. systemic UTI → management) is developed in the lesson "Rational antibiotic use" (block 5).

Clinical case

Content pending upload Progressive presentation of the case — the student makes decisions as it unfolds.

Self-assessment

Questions pending upload 5–10 multiple-choice questions on this lesson.

References

Links pending upload References to PubMed, DOI, scientific society guidelines and journals.

Uncomplicated urinary tract infection