How is disseminated invasive aspergillosis diagnosed?

Diagnosis usually requires blood tests, cytology, and fungal culture or tissue biopsy. Finding fungal organisms on culture or microscopy helps confirm the diagnosis — your vet will arrange the appropriate tests.

How long does treatment take?

Treatment is typically long-term, combining antifungal therapy with supportive care. The course may last weeks to months or longer, and your vet will adjust the duration based on clinical response and test results.

What home care can I provide?

At home, monitor your pet's appetite, water intake, vomiting, and bowel movements. Weigh your pet regularly and attend scheduled follow-up visits or blood draws as directed. Contact your vet if symptoms worsen.

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

Disseminated Invasive Aspergillosis in Dogs & Cats: Symptoms, Diagnosis & Treatment [2025]

Disseminated aspergillosis is a serious fungal infection most common in immunocompromised animals, requiring long-term antifungal treatment.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: ACVIM, AVMA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Unable to stand or extremely low activity level
•Repeated vomiting with inability to retain fluids
•Persistent diarrhea with visible signs of dehydration

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

•Noticeably reduced alertness but still responsive
•Significantly decreased appetite for two or three consecutive days
•Markedly increased frequency of vomiting or diarrhea

01What symptoms indicate something is wrong?

Disseminated aspergillosis in dogs and cats often presents with systemic and gastrointestinal symptoms, and the disease course can be chronic or relapsing.

Lethargy and noticeably reduced activity
Loss of appetite or significantly reduced food intake
Repeated vomiting or diarrhea, increasing in frequency
Chronic weight loss and progressive wasting
Seek veterinary evaluation if symptoms persist or worsen

Seek emergency care immediately if you notice the following symptoms:

⚠️ Seek veterinary care promptly if symptoms persist or worsen

02How to assess your pet at home: key observations and when to go to the emergency vet

Keeping a home record helps your vet assess the disease course and plan diagnostics — systematic tracking of data and video is recommended.

Note the timing and degree of changes in alertness and activity level
Weigh your pet daily and record changes in food and water intake
Log the number of vomiting episodes, vomit appearance, and stool consistency
Film any vomiting or unusual stools on your phone for your vet to review
Bring your records to the clinic or mention your observations when booking

03How will the vet diagnose my pet? Common diagnostic tests

At the clinic, blood tests, cytology, and culture are typically performed to identify systemic fungal infection and assess organ function.

Complete blood count (CBC)

assesses white blood cell changes and checks for anaemia

Biochemistry panel

evaluates liver, kidney, and metabolic function

Urinalysis

assesses kidney function and urine concentrating ability

Cytology

examines blood or body cavity fluid for abnormal cells

Culture (fungal/bacterial)

confirms the source of infection and guides treatment

Further testing at a specialist hospital with culture capability is recommended

04What happens after diagnosis? Medications, diet, and home care guide

Treatment typically involves long-term antifungal medication combined with supportive care, with regular monitoring to track response and side effects.

Your vet will prescribe antifungal therapy and supportive care based on test results
Attend regular follow-up appointments to monitor bloodwork and clinical signs
Adjust diet and nutrition to support recovery and weight gain
Continue monitoring food and water intake, vomiting, and elimination at home
Schedule follow-up cultures or blood tests as directed by your vet
Long-term follow-up at a specialist or referral hospital is recommended for best prognosis

05What to prepare before the vet visit: key information to help your vet quickly identify the cause

Note when symptoms first appeared and how they have changed over time

List daily food intake, number of vomiting episodes, and stool consistency

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

Save and back up any videos of vomiting or unusual stools on your phone

Bring previous test reports or imaging results if available for comparison

Call ahead to book an appointment and mention that culture testing may be needed

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.