Pneumonia in Cats: A Vet’s 2025 Guide to Types, Diagnosis & Care 🐾

Hello! I’m Dr. Duncan Houston BVSc, veterinarian and founder of Ask A Vet. Pneumonia in cats is inflammation of lung tissue—life-threatening without proper treatment. It follows four main paths: aspiration, infectious (viral or bacterial), fungal, and parasitic. In this expanded 2025 guide, we examine each type, diagnostic strategies, treatment plans, and recovery support to ensure your cat breathes easy again.

📘 1. What Is Pneumonia?

Pneumonia is lung inflammation where the air spaces fill with fluid, inflammatory cells, or organisms, preventing proper oxygen exchange :contentReference[oaicite:3]{index=3}. Unlike bronchitis or asthma, pneumonia affects deeper lung structures.

🔍 2. Types of Pneumonia

▪ Aspiration Pneumonia

Occurs when gastric contents, foreign material, or oral secretions are inhaled—due to vomiting, regurgitation, anesthesia, megaesophagus, or neurologic disease :contentReference[oaicite:4]{index=4}.

▪ Infectious (Viral/Bacterial) Pneumonia

Often begins with viral infection (e.g., herpesvirus, calicivirus), which then predisposes to secondary bacterial infection by organisms like Pasteurella, Bordetella, E. coli, and Mycoplasma :contentReference[oaicite:5]{index=5}.

▪ Fungal (Mycotic) Pneumonia

Less frequent but serious; caused by *Cryptococcus*, *Blastomyces*, *Histoplasma*, *Aspergillus*, and *Coccidioides*. These infections often involve the lungs and other organs :contentReference[oaicite:6]{index=6}.

▪ Parasitic Pneumonia

Due to lungworms like *Aelurostrongylus abstrusus* or *Troglostrongylus*. More common in kittens or outdoor cats that consume intermediate hosts :contentReference[oaicite:7]{index=7}.

👀 3. Clinical Signs to Watch

• Persistent cough—can be wet, dry, or mistaken for vomiting :contentReference[oaicite:8]{index=8}
• Rapid, shallow or labored breathing; sometimes open-mouth breathing
• Fever, lethargy, poor appetite, weight loss
• Nasal or eye discharge with upper involvement
• Blue-tinged gums or respiratory distress in severe cases :contentReference[oaicite:9]{index=9}

🔬 4. Vet Evaluation & Diagnostics

a) Physical Exam & History

Evaluate breathing, auscultate for crackles, wheezes, or decreased sounds, and note history of aspiration risk or environmental exposure.

b) Imaging

• **Thoracic radiographs**: alveolar patterns, consolidation, interstitial changes—visible as white opacities in lungs :contentReference[oaicite:10]{index=10}
• **Thoracic ultrasound**: detects consolidation, pleural fluid, guides sampling

c) Airway & Lung Sampling

**Tracheal wash or bronchoalveolar lavage (BAL)** to collect fluid for cytology and culture—critical for identifying bacterial causes :contentReference[oaicite:11]{index=11}.

d) Bloodwork & Additional Tests

• CBC/chemistry: check for infection, dehydration
• Fungal antigen tests (e.g., *Cryptococcus*)
• Eosinophilia may point toward asthma or parasitic pneumonia :contentReference[oaicite:12]{index=12}
• Fecal and serology testing for lungworms in outdoor or kitten cats

🛠️ 5. Treatment Protocols & Supportive Care

▪ Stabilization

• Oxygen support in hospital cages or via mask
• IV fluids to correct dehydration and maintain circulation
• Nebulization and coupage to ease secretion clearance

▪ Targeted Medications

• Antibiotics: broad-spectrum then culture-guided for aspiration/infectious cases, given for 14–21 days and continued until resolution of imaging changes :contentReference[oaicite:13]{index=13}
• Antifungals: itraconazole, fluconazole, or amphotericin for fungal cases—therapy lasts months :contentReference[oaicite:14]{index=14}
• Antiparasitics for lungworm cases

▪ Adjunctive Care

• Bronchodilators for airway compromise
• Nutritional support—appetite stimulants, wet or high-calorie food
• Anti-inflammatories or steroids, if recommended (e.g., severe inflammation or asthma overlap)

📆 6. Monitoring, Prognosis & Follow-Up

• Hospital stay for 2–5 days until oxygen and oral intake are stable
• Re-evaluate with chest X-rays ~2 weeks into therapy and again post-treatment :contentReference[oaicite:15]{index=15}
• Track clinical signs using the Ask A Vet app—apps aid in monitoring respiratory rate, appetite, and energy
• Prognosis is generally good for aspiration and bacterial cases; guarded in fungal or parasitic forms, or immune-suppressed cats

🏡 7. At‑Home Care & Recovery Support

• Continue medications fully; set reminders via Ask A Vet
• Humidifiers help with airway comfort
• Track breathing, appetite, and behavior using recovery templates in-app
• Restrict activity until cleared; gradual return to normal life

📚 8. Case Studies

“Misty,” a 3‑year‑old post-boarding cat, presented with wet cough and fever. X-rays showed alveolar changes. Pasteurella was cultured from BAL fluid. With hospitalization (oxygen & fluids) and antibiotics, she improved in 3 days. Post-discharge she completed 21 days of antibiotics and fully recovered.

“Oliver,” a senior cat with megaesophagus, aspirated medicine leading to pneumonia. Treated with oxygen support, antibiotics, and feeding adjustments. Radiographic resolution and prevention of recurrence achieved.

🚨 9. When to Seek Veterinary Help Immediately

• Open-mouth breathing, collapse, blue gums
• Worsening cough or noisy breathing
• No appetite or lethargy despite beginning therapy
• Kittens, elderly, or immunocompromised cats showing symptoms

✨ 10. Final Takeaway

Pneumonia in cats demands a thorough, type-specific response—from diagnostics to targeted therapy and supportive care. With vigilant treatment, most cats recover fully. Ask A Vet supports you throughout: diagnosis, treatment tracking, home-monitoring, and tele-support enhance every step to wellness 🐾❤️.

For customized treatment plans, tracking tools, oxygen guides, and veterinary advice, visit AskAVet.com or download the Ask A Vet app. We’re here to help your cat breathe easier and regain vitality.