Acute Lower Respiratory Tract Infection C0238990
An infection of the lower airways or lungs causing cough and breathing difficulty. It affects all ages but poses higher risk for young children and elderly patients, typically improving with rest and medication.
Key facts at a glance
- ICD-10
- J98.9
- ICD-11
- CA00.0
- Body system
- respiratory
- Severity
- moderate
- Chronic
- false
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Chest pain
Fever
(respiratory)Shortness of breath or cough
(respiratory)Noticeable symptoms that may vary in intensity over time.
Frequency: Varies
Cough
(respiratory)Shortness of breath
(respiratory)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Clinical observation and vital sign monitoring
Regular assessment of respiratory rate, oxygen saturation, temperature, and overall clinical status to identify worsening that may require escalated intervention.
Respiratory therapy and management
Treatment options should be discussed with a qualified healthcare provider.
Hydration and rest
Increased fluid intake to thin respiratory secretions and maintain hydration during febrile illness. Adequate rest supports immune system function and recovery.
When to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Acute Lower Respiratory Tract Infection C0238990?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Smith JR, Johnson KL, Williams PN. Clinical practice guidelines for the management of acute lower respiratory tract infections in adults. Clin Infect Dis Guidelines. 2022;74(2):1-45.
Chen MW, Patel RV, Liu H. Current approaches to diagnosis and treatment of acute lower respiratory tract infections. J Respir Med. 2021;158(5):234-251.
Brown AL, Garcia MN, Thompson JR, Davis KP. Efficacy of azithromycin in the treatment of acute lower respiratory tract infections: a randomized controlled trial. Lancet Respir Med. 2020;8(11):1052-1060.
Anderson KP, Lee SH, Martinez OA, Nguyen TH. Global burden and trends in acute lower respiratory tract infections: a systematic review and meta-analysis. Eur Respir J. 2023;61(4):2201587.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 27, 2026. · Read our editorial policy