How is toxoplasmosis diagnosed?

Your vet will assess clinical signs alongside blood work or PCR test results; specialist referral may be needed to confirm the diagnosis. Follow your vet's guidance on which tests to arrange.

How long does treatment for toxoplasmosis take?

Treatment duration depends on disease severity. Mild cases may improve within a few weeks, while severe cases or those with organ involvement may require longer treatment. Follow your vet's recommended follow-up schedule.

Can toxoplasmosis be transmitted to humans?

Toxoplasma gondii is a zoonotic parasite, and the risk is higher for people with weakened immune systems. If you have concerns, consult both your vet and a medical professional for appropriate precautions.

What information should I prepare before the vet visit?

Record the onset and progression of symptoms, frequency of vomiting and bowel movements, recent diet, and any videos or photos. Also prepare a list of current medications for your vet's reference.

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

Toxoplasmosis in Dogs & Cats: Symptoms, Diagnosis & PCR Testing [2025]

A parasitic infection caused by Toxoplasma gondii, with cats as the primary host; can cause multi-organ damage and requires antibiotic treatment

Take 1 minute to check the symptoms first

Last updated: 2025/12/16

Pethealthmap Editorial Team

Sources: AVMA, CDC, National Taiwan University Veterinary School

When to See a Vet

Seek Emergency Care Immediately

•Unable to stand on their own or persistently and severely lethargic
•Repeated vomiting episodes with inability to stay hydrated
•Rapid breathing or obvious difficulty breathing

Schedule a Clinic Visit Soon (within 24–72 hours)

•Noticeably reduced activity level lasting more than two days
•Significantly decreased appetite or persistent refusal to eat for more than one day
•Diarrhea or vomiting lasting more than forty-eight hours

01What Symptoms Indicate Something Is Wrong?

Toxoplasmosis in dogs and cats typically presents as generalised malaise and gastrointestinal signs; some cases may also show respiratory or neurological changes.

Lethargy or noticeably reduced activity
Persistent weakness, excessive sleepiness, or sluggish responses
Loss of appetite accompanied by weight loss
Frequent vomiting or persistent diarrhoea
Occasional rapid breathing or neurological signs such as unsteady gait

Seek emergency care immediately if you notice the following symptoms:

⚠️ Seek veterinary care if symptoms have not improved within 48 hours

02How to Monitor at Home: Key Observations & When to Go to the Emergency Vet

Observing and recording key details at home helps your vet quickly understand the progression of the condition and evaluate treatment response.

Note the date and time symptoms first appeared and how they have progressed
Track daily appetite, food intake, and any refusal to eat
Log the number of vomiting episodes, what was vomited, and when
Observe bowel movement frequency, consistency, and any presence of blood or mucus
Weigh your pet weekly and record any changes for your vet to compare
Record videos or photos of concerning signs (e.g. vomiting, abnormal gait) to share with your vet

03How Will the Vet Diagnose It? Common Diagnostic Tests

The vet will begin with a physical examination and, where necessary, combine blood tests, imaging, and specific diagnostics to confirm infection or rule out other conditions.

Physical examination

assessing temperature, mucous membranes, neurological reflexes, and respiratory status

Blood work

evaluating inflammatory markers and organ function (liver, kidneys)

PCR testing

detecting Toxoplasma gondii DNA at a specialist or reference laboratory (referral may be required)

Cytology or faecal examination

microscopic search for the organism or inflammatory cells

Imaging (X-ray / CT scan)

assessing involvement of the thorax, abdomen, or nervous system

04Post-Diagnosis Care: Medications, Diet Adjustments & Home Care Guide

Treatment is guided by test results and disease severity, and requires regular follow-up visits with any necessary monitoring tests.

Medication type and duration are determined and monitored by your vet
Maintain hydration and electrolyte balance; provide easily digestible, nutritious food
Home care focuses on a low-stress environment and regular feeding schedules
Schedule follow-up visits for blood work or imaging to assess treatment response
If symptoms do not improve or worsen, referral to a specialist hospital may be recommended

05What to Prepare Before the Vet Visit: Key Information to Help Your Vet

Note when symptoms started, how they have changed, and any history of eating raw meat or hunting

Compile a record of appetite, vomiting, and bowel movements over the past few days

Prepare a list of current medications, supplements, and vaccination records

Bring videos or photos of any concerning signs (vomiting, abnormal gait, or breathing difficulties)

Bring any previous test results or imaging for comparison, if available

Prepare a list of questions for your vet and note the urgency of your concerns

Consider booking a clinic that can perform PCR testing or specialist diagnostics

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.