Feline Panleukopenia (Feline Distemper): Symptoms, Treatment & Prevention

What is Feline Panleukopenia?

Feline panleukopenia, also known as feline distemper or feline parvovirus, is a highly contagious and often fatal viral disease in cats. It is caused by feline parvovirus (FPV), which is closely related to canine parvovirus. The virus attacks rapidly dividing cells in the bone marrow, intestinal tract, and developing fetuses.

Why Panleukopenia Is So Dangerous

• Extremely contagious: One gram of feces can contain millions of viral particles
• Environmentally stable: Survives 1+ years in the environment
• High mortality: 50-90% in untreated cats
• Resistant to disinfectants: Only bleach (1:32 dilution) reliably kills it

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Symptoms

Early Signs (2-10 days post-exposure)

• High fever (104-107°F)
• Lethargy and depression
• Complete loss of appetite
• Vomiting (starts early, persists)

Progressive Signs (Days 2-4)

• Severe, watery or bloody diarrhea
• Dehydration (rapid onset)
• Abdominal pain (hunched posture)
• Pale gums (anemia from bone marrow suppression)
• Nasal discharge

Critical Stage

• Septic shock from intestinal bacteria
• Hypothermia (body temperature drops)
• Death within 24-48 hours of severe symptoms

Who Is at Risk?

• Unvaccinated kittens 3-5 months old (highest risk)
• Unvaccinated adult cats
• Shelter and rescue cats
• Feral cat populations
• Pregnant cats (can cause miscarriage or cerebellar hypoplasia in kittens)

Diagnosis & Costs

Diagnostic Tests

• SNAP Parvo Test (cross-reacts with FPV): $40-80
• CBC (severely low white blood cells): $80-150
• Chemistry panel: $120-250
• Fecal PCR: $100-200

Total Diagnostic Cost: $150-400

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Treatment

Hospitalization (5-7 days minimum)

• IV fluids (aggressive rehydration): $100-200/day
• Anti-nausea medications (maropitant): $30-60/day
• Broad-spectrum antibiotics: $40-100/day
• Plasma transfusion (for white blood cell support): $200-500
• Vitamin B12 injection: $20-40
• Nutritional support (nasoesophageal tube): $50-100/day

Total Treatment Cost

• Mild case: $800-$2,000
• Moderate case: $2,000-$4,500
• Severe case: $4,500-$8,000+

Prevention

Vaccination (Core Vaccine)

• FVRCP vaccine (Feline Viral Rhinotracheitis, Calicivirus, Panleukopenia)
• Kitten schedule: 6-8, 10-12, and 14-16 weeks
• Adult boosters: Every 3 years
• Cost: $20-40 per dose
• Efficacy: 95%+ protection

Environmental Control

• Bleach solution (1:32) for disinfection
• Quarantine infected cats for 4+ weeks
• Isolate new cats before introducing to household
• Avoid shelters and multi-cat environments with unvaccinated cats

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Cerebellar Hypoplasia

If a pregnant cat is infected, kittens may be born with cerebellar hypoplasia - underdeveloped cerebellum causing lifelong balance and coordination issues. These cats can live happy lives but require special care.

Survival Rates

• With aggressive treatment: 50-85% survival
• Untreated: 10-20% survival (80-90% mortality)
• Survivors: Usually recover fully with no lasting damage

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Related: feline-leukemia, fiv-feline-immunodeficiency-virus, gastrointestinal-issues