Can feline panleukopenia spread to other cats?

This disease is highly contagious. If you have multiple cats, isolate the affected cat immediately and ask your vet whether further testing or preventive measures are needed.

How soon should I take my cat to the vet after noticing vomiting or diarrhoea?

If vomiting or diarrhoea persists for more than 24 hours, appetite drops noticeably, or signs of dehydration appear, seek veterinary care promptly and follow the vet's advice on further tests.

How long does hospitalisation typically last?

The length of hospitalisation varies with severity and response to treatment. Mild cases may need 1–3 days, while severe cases may require several days to more than a week, adjusted according to the vet's assessment.

Can my cat fully recover with home care alone?

Mild symptoms may be monitored at home with vet-advised supportive care, but if symptoms worsen or persist, a visit to the clinic for further evaluation and treatment is necessary.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Feline Panleukopenia in Cats: Symptoms, Diagnosis & Care Guide [2025]

Feline panleukopenia is a highly contagious viral disease, especially fatal in kittens. Symptoms include vomiting, bloody diarrhoea, and rapid dehydration. Emergency hospitalisation is required, and vaccination is highly effective at prevention.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: ISFM, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Persistent lethargy — unable to be roused or unresponsive
•Rapid breathing, obvious panting, or difficulty breathing
•Sudden inability to walk or collapse with limb weakness

Schedule a clinic visit soon (within 24–72 hours)

•Reduced appetite persisting for more than one day
•Repeated vomiting or diarrhea lasting more than 24 hours
•Obvious signs of dehydration, such as dry mouth or very little urine

01What symptoms indicate something is wrong?

This condition commonly presents as changes in alertness and appetite, accompanied by vomiting, diarrhoea, and other gastrointestinal symptoms; some cats may also show an unsteady gait or signs of dehydration.

Lethargy, slow responses, or excessive sleepiness
Noticeably reduced appetite or complete refusal to eat
Frequent vomiting or persistent discomfort after vomiting
Diarrhoea, changes in stool consistency, or bloody stools
Dry mouth, reduced urination, or other signs of dehydration
Unsteady gait, staggering to one side, or occasional falling

Seek emergency care immediately if you notice the following symptoms:

⚠️ Sudden collapse or loss of consciousness
⚠️ Breathing difficulty or severe laboured breathing
⚠️ Sudden inability to walk or hindlimb weakness

02What to look out for at home? Key observation points and when to seek emergency care

Keeping detailed records at home helps the vet quickly assess the situation and plan tests — aim to note exact times and frequencies where possible.

Note changes in alertness and activity levels throughout the day and night
Measure and record daily food and water intake
Log the frequency, timing, and content of each vomiting episode
Monitor frequency of diarrhoea, stool colour, and presence of blood
Track urination frequency and watch for difficulty urinating or reduced urine output
Film any abnormal gait or episodes on your phone to assist the vet's assessment

03How will the vet diagnose the condition? Common diagnostic tests

Diagnosis begins with a thorough physical examination, supplemented by blood, urine, imaging, or molecular tests to identify the cause and assess severity.

Full physical examination including neurological and dehydration assessment

Blood tests (including complete blood count) to evaluate white blood cell count and signs of infection

Biochemistry panel to assess liver and kidney function and electrolyte imbalances

Urinalysis to rule out urinary or metabolic conditions

PCR or viral testing to identify the causative pathogen (nucleic acid testing)

X-rays, CT, or MRI if needed to assess brain or spinal cord changes

Test results will determine whether specialist referral or hospitalisation is required

04What treatment and care follow diagnosis? Medications, dietary adjustments, and care guide

Treatment is primarily supportive, adjusted based on clinical and test findings, with regular check-ups scheduled to monitor recovery.

Intravenous fluids and electrolyte support to correct dehydration
Anti-nausea medication to control vomiting and improve tolerance for oral intake
Symptomatic medication as needed (e.g. antibiotics), at the vet's discretion
Severe cases may require blood transfusions or intensive care (as assessed by the vet)
Regular follow-up visits for blood work and clinical monitoring as advised by the vet
Referral to a specialist hospital is recommended for persistent or complex cases

05What to prepare before seeing the vet? Key information to help the vet quickly identify the cause

Record the onset time and exact timing of each symptom

Note changes in food intake, water consumption, and bowel habits over the past few days

Log the number of vomiting and diarrhoea episodes and the time of each

List all current medications, vaccines, and supplements

Bring photos or a sample of vomit or stool (if safe to collect)

Use a secure carrier and make an appointment in advance at a clinic or specialist hospital

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.

Related Symptoms (You May Also Be Looking For)

Low white cells

Loss of appetite

Incoordination

Fluid deficit

Decreased activity

Loose stool