Pulmonology focuses on diagnosing and treating lung and airway conditions such as asthma, COPD, and pneumonia, as well as overall respiratory health.

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Lung Infection: Treatment and Management

How a lung infection is treated depends on what is causing it, bacteria, viruses, or fungi, and how sick the patient is. There is no single treatment that works for everyone. Using antibiotics for viral infections can lead to resistance, but waiting too long to treat bacterial pneumonia can be very dangerous. At Liv Hospital, we use proven treatment plans that focus on the right medicine, strong supportive care, and the management of any complications to help patients recover fully.

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Antibiotic Therapy for Bacterial Infections

PULMONOLOGY

Antibiotics are the cornerstone of treating bacterial lung infections.

  • Empiric Therapy: Before the specific bacteria are identified, doctors start “empiric” antibiotics based on the most likely pathogens for the patient’s age and history. For healthy adults with community-acquired pneumonia, a macrolide (like azithromycin) or doxycycline is often used.
  • Complicated Cases: For patients with comorbidities or recent antibiotic use, a respiratory fluoroquinolone (like levofloxacin) or a beta-lactam plus a macrolide is chosen to cover resistant organisms.
  • Targeted Therapy: Once culture results are back, the antibiotic is “de-escalated” to the most narrow-spectrum drug that kills the specific bacteria found. This is crucial for antibiotic stewardship.
  • Duration: The typical course for uncomplicated pneumonia is 5 to 7 days. However, severe infections or those caused by organisms like Pseudomonas or MRSA may require 14 days or more. Lung abscesses often require weeks of therapy.
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Management of Viral Lung Infections

PULMONOLOGY

Antibiotics do not kill viruses. Treatment for viral lung infections is primarily supportive, but antivirals may be used in specific cases.

  • Influenza: Neuraminidase inhibitors (like oseltamivir) can shorten the duration of the flu and reduce complications if started within 48 hours of symptom onset.
  • COVID-19: Specific antivirals (like nirmatrelvir/ritonavir) and immunomodulators are used for patients at high risk of progression.
  • Supportive Care: For most viral infections, rest, hydration, and antipyretics (fever reducers) are the main treatments while the immune system clears the virus.
  • Monitoring: Viral pneumonia can damage the lungs and predispose patients to secondary bacterial infections, so vigilant monitoring is essential.

Treating Fungal and Mycobacterial Infections

These infections require distinct and often prolonged treatment courses.

  • Fungal Infections: Antifungal medications (like fluconazole, voriconazole, or amphotericin B) are used. The choice depends on the specific fungus (e.g., Aspergillus vs. Histoplasma) and the severity of the disease. Treatment often lasts for months.
  • Mycobacteria: Treatment for Mycobacterium avium lung infection and Tuberculosis involves a combination of multiple antibiotics (often 3 or 4 drugs) taken for a minimum of 6 to 12 months to prevent resistance and ensure eradication. Adherence is critical.
PULMONOLOGY

Supportive Care and Symptom Management

Regardless of the pathogen, supportive care helps the patient feel better and recover faster.

  • Oxygen Therapy: For patients with low oxygen levels (hypoxia), supplemental oxygen is provided via nasal cannula or mask to maintain saturation and protect organ function.
  • Hydration: Intravenous fluids may be necessary for patients who are too sick to drink or are dehydrated from fever. Proper hydration helps thin mucus.
  • Respiratory Therapy: Nebulized bronchodilators (such as albuterol) can help open airways in cases of wheezing. Mucolytics may help break down thick sputum. Chest physiotherapy helps mobilize secretions.
  • Pain Management: Analgesics are used to control pleuritic chest pain, allowing the patient to breathe deeply and cough effectively without severe pain.

Hospital Management of Severe Infections

Severe lung infections often require intensive care.

  • Sepsis Management: If the infection spreads to the bloodstream, causing sepsis, aggressive fluid resuscitation and vasopressors (medications to raise blood pressure) are used to maintain organ perfusion.
  • Ventilatory Support: In cases of acute respiratory distress syndrome (ARDS) or respiratory failure, non-invasive ventilation (BiPAP) or mechanical ventilation (intubation) takes over the work of breathing, allowing the lungs time to heal.
  • Drainage: If a large pleural effusion or empyema (pus pocket) forms, it must be drained using a chest tube or surgery, as antibiotics alone cannot penetrate the fluid effectively.

Monitoring Response to Treatment

Patients are closely monitored for clinical stability.

    • Clinical Signs: Improvement is typically seen within 48-72 hours of starting effective treatment. Fever should subside, and the respiratory rate should return to normal.
    • Follow-up Imaging: A chest X-ray is often repeated after a few weeks (usually 6-8 weeks) to ensure the pneumonia has completely cleared and to rule out underlying malignancy, especially in smokers.
    • Failure to Respond: If a patient does not improve, doctors re-evaluate for:
      • Incorrect diagnosis (e.g., non-infectious cause).
      • A resistant pathogen (bacteria not killed by the current antibiotic).
      • Complications (abscess, empyema).
      • Host factors (immunodeficiency).

Managing Specific Complications

  • Lung Abscess Treatment: Requires prolonged antibiotics (often 4-6 weeks) and sometimes percutaneous drainage.
  • Mac Lung Infection Management: Involves deciding whether to treat immediately or monitor (“watchful waiting”) based on symptom severity and lung damage, as the treatment is toxic and long-term.

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Assoc. Prof. MD. Engin Aynacı Assoc. Prof. MD. Engin Aynacı Pulmonology Overview and Definition
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FREQUENTLY ASKED QUESTIONS

What are the side effects of antibiotics for lung infection?

Common side effects include nausea, diarrhea, and stomach upset; some antibiotics can also cause allergic rashes or sensitivity to sunlight.

You cannot know for sure without tests, but bacterial pneumonia often causes a higher fever and thick, colored phlegm, while viral pneumonia may have a dry cough and more body aches.

The lungs are delicate tissue; the inflammation caused by the infection takes time to resolve, and the body needs energy to repair the damage and clear out the debris.

Mild bacterial pneumonia and most viral infections can be treated at home with rest and oral medication, but you must seek help if you have trouble breathing or confusion.

Fungal infections are treated with specific antifungal medications (pills or IV), usually for a much longer period (weeks to months) than bacterial infections.

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