Pneumonia in Pets: When Infection Reaches the Lungs
Pneumonia is a serious lung infection. Recognizing the signs early leads to faster recovery and better outcomes.
Pneumonia is inflammation and infection of the lung tissue and airways. It can be caused by bacteria, viruses, fungi, or aspiration of foreign material. Pneumonia is a significant cause of morbidity in both dogs and cats, and requires prompt veterinary treatment.
Key Points
- Pneumonia causes difficulty breathing, fever, and lethargy
- Aspiration pneumonia occurs when food, vomit, or liquid enters the lungs
- Bacterial pneumonia is the most common type in pets
- Young puppies, seniors, and brachycephalic breeds are at higher risk
- Chest X-rays and blood tests confirm the diagnosis
- Treatment includes antibiotics, oxygen, nebulization, and supportive care
Types of Pneumonia
Bacterial pneumonia is most common, usually secondary to viral infection or aspiration. Common bacteria include Bordetella, Streptococcus, and E. coli. Viral pneumonia is caused by distemper, parainfluenza, and influenza. Fungal pneumonia results from histoplasmosis, blastomycosis, or coccidioidomycosis — more common in certain geographic regions. Aspiration pneumonia occurs when stomach contents or foreign material enter the lungs during vomiting, regurgitation, or anesthesia.
Recognizing Pneumonia
Pneumonia causes rapid, shallow breathing with increased effort. You may see the abdomen moving excessively with each breath. Fever, lethargy, and loss of appetite are common. Coughing may be moist and productive. Nasal discharge — sometimes pus-like — occurs. Cyanosis (blue-tinged gums) indicates severe oxygen deficiency. Some pets sit with elbows abducted to maximize chest expansion. In aspiration pneumonia, signs appear within hours of the vomiting/regurgitation event.
Diagnosis
Chest X-rays are the cornerstone of diagnosis — they show characteristic patterns of lung consolidation, especially in the cranioventral lobes for aspiration pneumonia. Complete blood count shows elevated white blood cells. Blood chemistry assesses overall health. Pulse oximetry measures blood oxygen levels; values below 92% indicate significant compromise. Arterial blood gas analysis provides detailed oxygenation status. Bronchoscopy with bronchoalveolar lavage (BAL) obtains samples for bacterial culture and cytology.
Treatment & Recovery
Hospitalization is usually required. IV antibiotics cover common pathogens — amoxicillin-clavulanate, enrofloxacin, or clindamycin are common choices. Oxygen therapy via cage, mask, or nasal cannula maintains saturation. Nebulization and coupage (gentle chest percussion) help mobilize secretions. IV fluids maintain hydration. Nutritional support is critical for recovery. Aspiration pneumonia may require suction if large amounts of material are present. Recovery takes 2-6 weeks depending on severity.
When to See a Vet Immediately
- Your pet is breathing rapidly and with increased effort
- There's fever, lethargy, and loss of appetite
- Coughing is productive with thick discharge
- Gums appear blue or pale
- Your pet was recently vomiting or had anesthesia
How RVC Can Help
This article is for educational purposes only and does not replace professional veterinary advice. If your pet is showing any symptoms, please contact Royal Veterinary Center immediately at +853 6677 6611.