Lungworms in Cats: 2025 Vet Insights 🐱💨

Hi, I’m Dr Duncan Houston BVSc, feline veterinarian and founder of Ask A Vet. In 2025, lungworm infections remain uncommon but noteworthy in cats, especially those hunting slugs, snails, rodents, birds, or lizards. This guide covers the life cycle of common lungworms, clinical signs, diagnostics, treatment plans, prognosis, and how our telehealth tools—Ask A Vet, Woopf, Purrz—can support your cat at home. Let’s breathe easier and keep your feline friend healthy! 💙

📌 What Are Lungworms?

Lungworms are parasitic nematodes inhabiting the airways or lungs. In cats, the most common species include Aelurostrongylus abstrusus (primarily in lungs) and Eucoleus aerophilus (tracheobronchial capillarid) :contentReference[oaicite:3]{index=3}. Wild lungworm types like Troglostrongylus and Oslerus are reported in some regions :contentReference[oaicite:4]{index=4}.

🐛 Life Cycle (See Images Above)

• Eggs or larvae are passed in feces → ingested by snails/slugs (intermediate hosts) → cats consume snail or a prey animal containing larvae → larvae migrate via bloodstream to lungs → mature and lay eggs → cough up, swallow, and continue cycle :contentReference[oaicite:5]{index=5}.
• L1 larvae appear in feces ~30–45 days post-infection :contentReference[oaicite:6]{index=6}.

⚠️ Why It Matters

• Can cause chronic or acute respiratory disease: coughing, wheezing, dyspnea, nasal discharge.
• Kittens and immunocompromised cats are at higher risk :contentReference[oaicite:7]{index=7}.
• Severe infection may lead to bronchitis, pneumonia, weight loss, fever, lymphadenopathy, ocular signs :contentReference[oaicite:8]{index=8}.

👁️ Signs & Symptoms

• Coughing—may mimic retching or gagging
• Labored or rapid breathing, wheezing, open-mouth breathing
• Nasal discharge, sneezing, fever, weight loss, lethargy, reduced appetite :contentReference[oaicite:9]{index=9}
• Kittens may show more severe or life-threatening signs :contentReference[oaicite:10]{index=10}

🧪 Diagnostic Approach

1. History & Exam: Outdoor exposure, hunting behavior, respiratory distress.
2. Bloodwork: Often reveals eosinophilia; general health assessment :contentReference[oaicite:11]{index=11}.
3. Thoracic Imaging: X-rays show bronchial/interstitial patterns, nodules; CT used if needed :contentReference[oaicite:12]{index=12}.
4. Fecal Baermann Test: Detects L1 larvae; best performed on samples from 3 consecutive days :contentReference[oaicite:13]{index=13}.
5. Fecal Flotation: Useful for E. aerophilus eggs :contentReference[oaicite:14]{index=14}.
6. Bronchoalveolar Lavage (BAL): May detect larvae or eggs; PCR testing sometimes available :contentReference[oaicite:15]{index=15}.

🛠️ Treatment Plan

A. Anthelmintic Therapy

• Fenbendazole (50 mg/kg PO daily for 5–10 days) or Ivermectin-based treatments :contentReference[oaicite:16]{index=16}.
• Selamectin or topical emodepside-praziqantel (Profender®) in some regions :contentReference[oaicite:17]{index=17}.
• Long therapy (4–8 weeks) may be required; follow-up fecal exams validate success :contentReference[oaicite:18]{index=18}.

B. Supportive Care

• Oxygen therapy if severely dyspneic
• Antibiotics for secondary bacterial pneumonia
• Corticosteroids may reduce inflammation; weigh risks and benefits :contentReference[oaicite:19]{index=19}.
• Hydration, nutritional support, rest

C. Monitoring & Follow-Up

• Repeat imaging 4–6 weeks post-treatment
• Recheck fecal samples to confirm larval clearance
• Track respiratory signs and body condition

🌱 Prognosis

• Good in mild to moderate cases; most cats recover fully.
• Kittens and immunocompromised cats may need intensive care; rare fatalities :contentReference[oaicite:20]{index=20}.
• Chronic or untreated infections may cause lasting pulmonary damage.

🏠 At‑Home Monitoring & Telehealth Tools

• Ask A Vet: Guides deworming schedule, respiratory monitoring, and advice if signs worsen.
• Woopf: Delivers medications, supports fluid therapy, and provides humid/fresh air environment tips.
• Purrz: Daily logging of breathing rate, cough frequency, appetite, weight, and activity to detect relapses early.

🛡️ Prevention Strategies

• Keep cats indoors to avoid intermediate hosts.
• Control snail/slug exposure in gardens.
• Routine deworming every 3–6 months with broad-spectrum products.
• Regular litterbox and fecal checks twice-yearly for indoor cats.

🔬 2025 Veterinary Advances

• Point-of-care PCR testing to detect larvae eggs
• Extended-release antiparasitics for less frequent dosing
• AI-assisted home monitoring of respiratory function via Purrz
• Novel anti-inflammatory protocols minimizing steroid exposure

✅ Vet‑Approved Care Roadmap

1. Recognize persistent cough or breathing changes.
2. Veterinary exam with imaging and Baermann testing.
3. Administer anthelmintic treatment for prescribed duration.
4. Provide supportive therapies if needed.
5. Reassess via fecal testing and imaging post-treatment.
6. Support recovery and prevent reinfection with Ask A Vet, Woopf & Purrz.
7. Implement preventive strategies to avoid recurrence.

✨ Final Thoughts from Dr Houston

Lungworm infections in cats may be uncommon, but they’re treatable and preventable. With early diagnosis, careful deworming, and strong home-care supported by Ask A Vet, Woopf, and Purrz, most cats make a full recovery. In 2025, modern diagnostics and telehealth tools make it easier than ever to ensure your cat's lungs stay clear and healthy. Your attention and proactive management keep your feline companion breathing easy for years to come. 💙🐾

Need help now? Visit AskAVet.com or download our app for expert lungworm care, treatment monitoring, and peace of mind.