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Urinary Tract Infection: A Primary Care Perspective

Author's details

  • Dr Omenyi-Onuorah Chidinma Crystal
  • MBBS, FWACP
  • Department of Family Medicine Nnamdi Azikiwe University Teaching Hospital, Nnewi

Reviewer's details

  • Dr. Khashau Eleburuike
  • MBBS (Ilorin), MSc (Global Health, Karolinska Institutet), SFAM, Socialstyrelsen
  • Consultant in Family Medicine, Norrbotten County, Sweden.
  • Date Uploaded: 2026-05-04
  • Date Updated: 2026-05-04

Urinary Tract Infection: A Primary Care Perspective

Key Messages

Background

Urinary tract infections (UTIs) are among the most common bacterial infections and can involve any part of the urinary system, including the kidneys (pyelonephritis), bladder (cystitis), and urethra (urethritis). Most UTIs occur when gut bacteria ascend from the urethra into the bladder and may progress to the kidneys; less commonly, infection may occur via the hematogenous route.4 Escherichia coli causes most UTIs, while other important organisms include Proteus, Klebsiella, Streptococcus, and Enterococcus. UTIs are more common in women than in men because of a shorter urethra and closer proximity of the urethral opening to the anus; men are partially protected by the antimicrobial effects of prostate secretions. Pregnant and postmenopausal women may experience more UTIs due to hormonal changes, urinary stasis, and exposures such as catheterisation. After menopause, reduced estrogen lowers protective vaginal flora, allowing uropathogens to proliferate. Uncomplicated UTI typically refers to lower UTI in healthy, nonpregnant, premenopausal women without urinary tract abnormalities. Complicated UTI includes infection in men, pregnancy, postmenopause, catheter use, structural or functional urinary tract abnormalities, immunocompromising conditions (e.g., diabetes, HIV), recurrent infection, and suspected upper urinary tract involvement.

Discussion

Symptoms

In uncomplicated lower UTI, typical symptoms include dysuria (with or without frequency and urgency), suprapubic pain, foul-smelling urine, and hematuria. In suspected upper UTI (pyelonephritis), systemic features may occur, including fever, chills, nausea or vomiting, flank pain, and (particularly in older adults) acute confusion. Some patients may have no symptoms (asymptomatic bacteriuria), especially in pregnancy or older adults; this can resolve spontaneously or progress to symptomatic infection.

Clinical Findings

Patients may appear uncomfortable. Fever and tachycardia suggest systemic involvement. Suprapubic tenderness supports cystitis, while costovertebral angle tenderness suggests upper tract involvement (e.g., pyelonephritis). Urine may appear cloudy on inspection.

Differential Diagnosis

Consider vaginitis, sexually transmitted infections, overactive bladder, interstitial cystitis, urolithiasis, tubo-ovarian abscess, appendicitis, and acute pyelonephritis. Predisposing factors for UTI include uncontrolled diabetes, sexual intercourse, contraceptive use (particularly spermicides), pregnancy, and recent instrumentation or perioperative exposure.

Investigations

No single symptom reliably confirms or excludes UTI. In women with classic lower-tract symptoms and no vaginal discharge or systemic features, a clinical diagnosis is often appropriate. In unclear cases, perform an in-person assessment and dipstick urinalysis. A properly collected urine specimen (clean-catch midstream; or, where indicated, suprapubic aspiration or in-and-out catheterisation) is important for accurate diagnosis. Dipstick findings such as nitrites, leukocyte esterase, blood, and urine pH support the diagnosis. Urine culture and susceptibility testing are recommended for men; pregnant women; patients with diabetes or other immunosuppression; and patients with recurrent infection, treatment failure, previous resistant organisms, or atypical presentation. Culture is diagnostic when bacterial growth exceeds CFU/mL without symptoms (asymptomatic bacteriuria) or CFU/mL when characteristic symptoms are present.

Treatment

Treatment aims to relieve symptoms, eradicate infection, prevent complications and recurrence, and minimise antimicrobial resistance. For acute uncomplicated UTI in adults, short-course, targeted therapy is recommended. First-line options include fosfomycin (single 3 g dose), nitrofurantoin (100 mg twice daily for 5 days), trimethoprim (for 3 days), or trimethoprim-sulfamethoxazole (for 3 days), guided by local resistance patterns and patient factors (e.g., allergies, pregnancy status). Supportive care (hydration and analgesia) may be offered for symptom relief. Fluoroquinolones should generally be avoided for uncomplicated cystitis because of collateral damage and rising resistance, and should be reserved for more severe or complicated infections where appropriate; complicated infections commonly require longer courses (often 7–14 days) depending on severity and response. In complicated UTI or suspected pyelonephritis, send urine for culture and tailor antibiotics to susceptibility results; oral or intravenous therapy is selected based on clinical stability and setting. In high-risk cases, follow-up (including repeat culture where indicated) helps confirm resolution and guides further management. Asymptomatic bacteriuria generally does not require treatment, except in pregnant women and in patients undergoing invasive urological procedures associated with mucosal trauma.

Prevention and Control

Screening for asymptomatic bacteriuria should generally be avoided, except in pregnancy. Practical measures that may reduce recurrent UTI include adequate fluid intake, wiping front to back after toileting, not delaying urination, and voiding soon after sexual intercourse. Cranberry products and methenamine hippurate may also reduce recurrence in selected patients. Vaginal oestrogen can help prevent recurrences in postmenopausal women. For women with frequent recurrences, postcoital or continuous prophylactic antibiotics may be effective; options include fosfomycin every 10 days or nightly nitrofurantoin or trimethoprim for three to six months, depending on risk, tolerance, and local guidance.

Conclusion:

UTIs are common in primary care and are usually manageable. Early recognition, appropriate investigation, and targeted antibiotic therapy help prevent complications, reduce recurrence, and support antibiotic stewardship. Primary care clinicians play a central role in prompt diagnosis, patient education, and culturally sensitive counselling.

Interesting patient case

A 35-year-old woman presented late to the general outpatient clinic with a 14-day history of dysuria, lower abdominal pain, fever, and blood-tinged urine. She had self-treated with over-the-counter amoxicillin (one tablet daily for three days) and had also visited a spiritual healer who attributed her symptoms to poisoning. By presentation, she had developed right-sided flank pain and tenderness, and acute pyelonephritis was diagnosed. Financial constraints influenced the decision to manage her as an outpatient with close follow-up, despite the risk of complications. She was counselled on UTI, the importance of early presentation, medication adherence, and prevention measures, and reassured that medical care can complement prayer. She improved with this structured, patient-centred approach, highlighting the role of primary care in culturally sensitive UTI management.

Author’s reflection

As a family physician in Eastern Nigeria, I see UTIs frequently, and their presentation and outcomes are strongly shaped by sociocultural and economic factors. Many patients delay seeking care after self-prescribed antibiotics, traditional remedies, or spiritual interventions, which can worsen illness and contribute to antimicrobial resistance. Poverty and low health literacy require patient-centered counselling that is evidence-based, practical, and easy to understand. The goal is to promote early presentation, strengthen community education about the treatable nature of UTI, and practise antibiotic stewardship within a framework of trust, respect, and cultural sensitivity.

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Further readings
  1. Amiri, F. et al. Epidemiology of urinary tract infections in the Middle East and North Africa, 1990–2021. Trop Med Health 53, 16 (2025).
  2. Mwang’onde, B. J. & Mchami, J. I. The aetiology and prevalence of urinary tract infections in Sub-Saharan Africa: a Systematic Review. Journal of Health & Biological Sciences 10, 1–7 (2022).
  3. Mengistu, D. A. et al. Incidence of Urinary Tract Infection Among Patients: Systematic Review and Meta-Analysis. INQUIRY 60, 00469580231168746 (2023).
  4. Clinical Presentations and Epidemiology of Urinary Tract Infections. https://journals.asm.org/doi/epub/10.1128/microbiolspec.uti-0002-2012 doi:10.1128/microbiolspec.uti-0002-2012.
  5. Braun, T. Urinary Tract Infection – StatPearls – NCBI Bookshelf. Urinary Tract Infection.
  6. Czajkowski, K., Broś-Konopielko, M. & Teliga-Czajkowska, J. Urinary tract infection in women. Menopause Rev 20, 40–47 (2021).
  7. Keuler, N., Johnson, Y. & Coetzee, R. Treating urinary tract infections in public sector primary healthcare facilities in Cape Town, South Africa: A pharmaceutical perspective. South African Medical Journal 112, 487–493 (2022).
  8. Holm, A., Siersma, V. & Cordoba, G. C. Diagnosis of urinary tract infection based on symptoms: how are likelihood ratios affected by age? a diagnostic accuracy study. BMJ Open 11, e039871 (2021).
  9. Ademola, B. L., Atanda, A. T., Aji, S. A. & Abdu, A. Clinical, Morphologic and Histological Features of Chronic Pyelonephritis: An 8-Year Review. Nigerian Postgraduate Medical Journal 27, 37 (2020).
  10. Colgan, R., Jaffe, G. A. & Nicolle, L. E. Asymptomatic Bacteriuria. afp 102, 99–104 (2020).
  11. Urinary Tract Infections. https://www.emra.org/emresident/article/urinary-tract-infections.
  12. Evaluation of the Patient With Urologic Issues – Urology. MSD Manual Professional Edition https://www.msdmanuals.com/professional/genitourinary-disorders/approach-to-the-patient-with-urologic-issues/evaluation-of-the-patient-with-urologic-issues.
  13. Butler, C. C. et al. Variations in presentation, management, and patient outcomes of urinary tract infection: a prospective four-country primary care observational cohort study. Br J Gen Pract 67, e830–e841 (2017).
  14. Bendig, D. W. The Differential Diagnosis of Sterile Pyuria in Pediatric Patients: A Review. Global Pediatric Health 8, 2333794X21993712 (2021).
  15. Kurotschka, P. K., Gágyor, I. & Ebell, M. H. Acute Uncomplicated UTIs in Adults: Rapid Evidence Review. afp 109, 167–174 (2024).
  16. Fanshawe, T. R., Judge, R. K., Mort, S., Butler, C. C. & Hayward, G. N. Evidence-based appraisal of two guidelines for the diagnosis of suspected, uncomplicated urinary tract infections in primary care: a diagnostic accuracy validation study. J Antimicrob Chemother 78, 2080–2088 (2023).
  17. Mancuso, G. et al. Urinary Tract Infections: The Current Scenario and Future Prospects. Pathogens 12, (2023).
  18. Abou Heidar, N. F., Degheili, J. A., Yacoubian, A. A. & Khauli, R. B. Management of urinary tract infection in women: A practical approach for everyday practice. Urology Annals 11, 339 (2019).
  19. Marepalli, N., Nadipelli, A., Mnohar Kumar Jain, R. J., Parnam, L. S. & Vashyan, A. Patterns of Antibiotic Resistance in Urinary Tract Infections: A Retrospective Observational Study – PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC11260196/.
  20. Kwok, M. et al. Guideline of guidelines: management of recurrent urinary tract infections in women. BJU International 130, 11–22 (2022).
  21. Cooper, E. et al. Diagnosis and Management of UTI in Primary Care Settings—A Qualitative Study to Inform a Diagnostic Quick Reference Tool for Women Under 65 Years. Antibiotics 9, (2020).

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Urinary Tract Infection: A Primary Care Perspective

Author's details

Reviewer's details

Urinary Tract Infection: A Primary Care Perspective

Urinary tract infections (UTIs) are among the most common bacterial infections and can involve any part of the urinary system, including the kidneys (pyelonephritis), bladder (cystitis), and urethra (urethritis). Most UTIs occur when gut bacteria ascend from the urethra into the bladder and may progress to the kidneys; less commonly, infection may occur via the hematogenous route.4 Escherichia coli causes most UTIs, while other important organisms include Proteus, Klebsiella, Streptococcus, and Enterococcus. UTIs are more common in women than in men because of a shorter urethra and closer proximity of the urethral opening to the anus; men are partially protected by the antimicrobial effects of prostate secretions. Pregnant and postmenopausal women may experience more UTIs due to hormonal changes, urinary stasis, and exposures such as catheterisation. After menopause, reduced estrogen lowers protective vaginal flora, allowing uropathogens to proliferate. Uncomplicated UTI typically refers to lower UTI in healthy, nonpregnant, premenopausal women without urinary tract abnormalities. Complicated UTI includes infection in men, pregnancy, postmenopause, catheter use, structural or functional urinary tract abnormalities, immunocompromising conditions (e.g., diabetes, HIV), recurrent infection, and suspected upper urinary tract involvement.

  1. Amiri, F. et al. Epidemiology of urinary tract infections in the Middle East and North Africa, 1990–2021. Trop Med Health 53, 16 (2025).
  2. Mwang’onde, B. J. & Mchami, J. I. The aetiology and prevalence of urinary tract infections in Sub-Saharan Africa: a Systematic Review. Journal of Health & Biological Sciences 10, 1–7 (2022).
  3. Mengistu, D. A. et al. Incidence of Urinary Tract Infection Among Patients: Systematic Review and Meta-Analysis. INQUIRY 60, 00469580231168746 (2023).
  4. Clinical Presentations and Epidemiology of Urinary Tract Infections. https://journals.asm.org/doi/epub/10.1128/microbiolspec.uti-0002-2012 doi:10.1128/microbiolspec.uti-0002-2012.
  5. Braun, T. Urinary Tract Infection – StatPearls – NCBI Bookshelf. Urinary Tract Infection.
  6. Czajkowski, K., Broś-Konopielko, M. & Teliga-Czajkowska, J. Urinary tract infection in women. Menopause Rev 20, 40–47 (2021).
  7. Keuler, N., Johnson, Y. & Coetzee, R. Treating urinary tract infections in public sector primary healthcare facilities in Cape Town, South Africa: A pharmaceutical perspective. South African Medical Journal 112, 487–493 (2022).
  8. Holm, A., Siersma, V. & Cordoba, G. C. Diagnosis of urinary tract infection based on symptoms: how are likelihood ratios affected by age? a diagnostic accuracy study. BMJ Open 11, e039871 (2021).
  9. Ademola, B. L., Atanda, A. T., Aji, S. A. & Abdu, A. Clinical, Morphologic and Histological Features of Chronic Pyelonephritis: An 8-Year Review. Nigerian Postgraduate Medical Journal 27, 37 (2020).
  10. Colgan, R., Jaffe, G. A. & Nicolle, L. E. Asymptomatic Bacteriuria. afp 102, 99–104 (2020).
  11. Urinary Tract Infections. https://www.emra.org/emresident/article/urinary-tract-infections.
  12. Evaluation of the Patient With Urologic Issues – Urology. MSD Manual Professional Edition https://www.msdmanuals.com/professional/genitourinary-disorders/approach-to-the-patient-with-urologic-issues/evaluation-of-the-patient-with-urologic-issues.
  13. Butler, C. C. et al. Variations in presentation, management, and patient outcomes of urinary tract infection: a prospective four-country primary care observational cohort study. Br J Gen Pract 67, e830–e841 (2017).
  14. Bendig, D. W. The Differential Diagnosis of Sterile Pyuria in Pediatric Patients: A Review. Global Pediatric Health 8, 2333794X21993712 (2021).
  15. Kurotschka, P. K., Gágyor, I. & Ebell, M. H. Acute Uncomplicated UTIs in Adults: Rapid Evidence Review. afp 109, 167–174 (2024).
  16. Fanshawe, T. R., Judge, R. K., Mort, S., Butler, C. C. & Hayward, G. N. Evidence-based appraisal of two guidelines for the diagnosis of suspected, uncomplicated urinary tract infections in primary care: a diagnostic accuracy validation study. J Antimicrob Chemother 78, 2080–2088 (2023).
  17. Mancuso, G. et al. Urinary Tract Infections: The Current Scenario and Future Prospects. Pathogens 12, (2023).
  18. Abou Heidar, N. F., Degheili, J. A., Yacoubian, A. A. & Khauli, R. B. Management of urinary tract infection in women: A practical approach for everyday practice. Urology Annals 11, 339 (2019).
  19. Marepalli, N., Nadipelli, A., Mnohar Kumar Jain, R. J., Parnam, L. S. & Vashyan, A. Patterns of Antibiotic Resistance in Urinary Tract Infections: A Retrospective Observational Study – PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC11260196/.
  20. Kwok, M. et al. Guideline of guidelines: management of recurrent urinary tract infections in women. BJU International 130, 11–22 (2022).
  21. Cooper, E. et al. Diagnosis and Management of UTI in Primary Care Settings—A Qualitative Study to Inform a Diagnostic Quick Reference Tool for Women Under 65 Years. Antibiotics 9, (2020).

Content

Home
Topics
Urinary Tract Infection: A Primary Care Perspective

Author's details

Reviewer's details

Urinary Tract Infection: A Primary Care Perspective

Urinary tract infections (UTIs) are among the most common bacterial infections and can involve any part of the urinary system, including the kidneys (pyelonephritis), bladder (cystitis), and urethra (urethritis). Most UTIs occur when gut bacteria ascend from the urethra into the bladder and may progress to the kidneys; less commonly, infection may occur via the hematogenous route.4 Escherichia coli causes most UTIs, while other important organisms include Proteus, Klebsiella, Streptococcus, and Enterococcus. UTIs are more common in women than in men because of a shorter urethra and closer proximity of the urethral opening to the anus; men are partially protected by the antimicrobial effects of prostate secretions. Pregnant and postmenopausal women may experience more UTIs due to hormonal changes, urinary stasis, and exposures such as catheterisation. After menopause, reduced estrogen lowers protective vaginal flora, allowing uropathogens to proliferate. Uncomplicated UTI typically refers to lower UTI in healthy, nonpregnant, premenopausal women without urinary tract abnormalities. Complicated UTI includes infection in men, pregnancy, postmenopause, catheter use, structural or functional urinary tract abnormalities, immunocompromising conditions (e.g., diabetes, HIV), recurrent infection, and suspected upper urinary tract involvement.

  1. Amiri, F. et al. Epidemiology of urinary tract infections in the Middle East and North Africa, 1990–2021. Trop Med Health 53, 16 (2025).
  2. Mwang’onde, B. J. & Mchami, J. I. The aetiology and prevalence of urinary tract infections in Sub-Saharan Africa: a Systematic Review. Journal of Health & Biological Sciences 10, 1–7 (2022).
  3. Mengistu, D. A. et al. Incidence of Urinary Tract Infection Among Patients: Systematic Review and Meta-Analysis. INQUIRY 60, 00469580231168746 (2023).
  4. Clinical Presentations and Epidemiology of Urinary Tract Infections. https://journals.asm.org/doi/epub/10.1128/microbiolspec.uti-0002-2012 doi:10.1128/microbiolspec.uti-0002-2012.
  5. Braun, T. Urinary Tract Infection – StatPearls – NCBI Bookshelf. Urinary Tract Infection.
  6. Czajkowski, K., Broś-Konopielko, M. & Teliga-Czajkowska, J. Urinary tract infection in women. Menopause Rev 20, 40–47 (2021).
  7. Keuler, N., Johnson, Y. & Coetzee, R. Treating urinary tract infections in public sector primary healthcare facilities in Cape Town, South Africa: A pharmaceutical perspective. South African Medical Journal 112, 487–493 (2022).
  8. Holm, A., Siersma, V. & Cordoba, G. C. Diagnosis of urinary tract infection based on symptoms: how are likelihood ratios affected by age? a diagnostic accuracy study. BMJ Open 11, e039871 (2021).
  9. Ademola, B. L., Atanda, A. T., Aji, S. A. & Abdu, A. Clinical, Morphologic and Histological Features of Chronic Pyelonephritis: An 8-Year Review. Nigerian Postgraduate Medical Journal 27, 37 (2020).
  10. Colgan, R., Jaffe, G. A. & Nicolle, L. E. Asymptomatic Bacteriuria. afp 102, 99–104 (2020).
  11. Urinary Tract Infections. https://www.emra.org/emresident/article/urinary-tract-infections.
  12. Evaluation of the Patient With Urologic Issues – Urology. MSD Manual Professional Edition https://www.msdmanuals.com/professional/genitourinary-disorders/approach-to-the-patient-with-urologic-issues/evaluation-of-the-patient-with-urologic-issues.
  13. Butler, C. C. et al. Variations in presentation, management, and patient outcomes of urinary tract infection: a prospective four-country primary care observational cohort study. Br J Gen Pract 67, e830–e841 (2017).
  14. Bendig, D. W. The Differential Diagnosis of Sterile Pyuria in Pediatric Patients: A Review. Global Pediatric Health 8, 2333794X21993712 (2021).
  15. Kurotschka, P. K., Gágyor, I. & Ebell, M. H. Acute Uncomplicated UTIs in Adults: Rapid Evidence Review. afp 109, 167–174 (2024).
  16. Fanshawe, T. R., Judge, R. K., Mort, S., Butler, C. C. & Hayward, G. N. Evidence-based appraisal of two guidelines for the diagnosis of suspected, uncomplicated urinary tract infections in primary care: a diagnostic accuracy validation study. J Antimicrob Chemother 78, 2080–2088 (2023).
  17. Mancuso, G. et al. Urinary Tract Infections: The Current Scenario and Future Prospects. Pathogens 12, (2023).
  18. Abou Heidar, N. F., Degheili, J. A., Yacoubian, A. A. & Khauli, R. B. Management of urinary tract infection in women: A practical approach for everyday practice. Urology Annals 11, 339 (2019).
  19. Marepalli, N., Nadipelli, A., Mnohar Kumar Jain, R. J., Parnam, L. S. & Vashyan, A. Patterns of Antibiotic Resistance in Urinary Tract Infections: A Retrospective Observational Study – PMC. https://pmc.ncbi.nlm.nih.gov/articles/PMC11260196/.
  20. Kwok, M. et al. Guideline of guidelines: management of recurrent urinary tract infections in women. BJU International 130, 11–22 (2022).
  21. Cooper, E. et al. Diagnosis and Management of UTI in Primary Care Settings—A Qualitative Study to Inform a Diagnostic Quick Reference Tool for Women Under 65 Years. Antibiotics 9, (2020).
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