Common Cat Infections and Diseases: A Quick Guide
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Cats are masters at hiding illness, but early detection is key. Here are the most common infections and diseases vets diagnose in the US & UK.
1. Upper Respiratory Infections (URIs)
Often caused by herpesvirus or calicivirus. Signs include:
- Sneezing
- Runny nose
- Eye discharge
- Drooling
Vaccination reduces severity, but indoor cats can still catch URIs.
2. Feline Lower Urinary Tract Disease (FLUTD)
Extremely common in adult cats. Watch for:
- Straining to pee
- Bloody urine
- Frequent trips to the litter box
Male cats can become blocked — a medical emergency.

3. Dental Disease
Over 70% of cats develop dental issues by age three. Symptoms:
- Bad breath
- Drooling
- Difficulty chewing
Annual dental checks are essential.
4. Parasites
Fleas, worms, and mites can cause itching, anemia, and digestive issues. Always use vet-approved preventatives.
5. Chronic Conditions
- Hyperthyroidism
- Kidney disease
- Diabetes
Senior cats should receive annual bloodwork to catch disease early.




