Can nasal aspergillosis spread to people or other pets?

General nasal aspergillosis in dogs and cats is primarily an animal-to-animal or environment-related infection; the risk to healthy adult humans is low. If there is an immunocompromised person in the household, consult your veterinarian or physician and maintain good environmental hygiene.

What tests are needed to diagnose nasal aspergillosis?

Common tests include a physical examination, X-ray or CT evaluation of the sinuses, nasal sampling for microscopy and culture, and a tissue biopsy if needed to confirm the lesion.

How long does treatment for nasal aspergillosis take before improvement is seen?

Recovery time varies depending on the stage of the disease and the treatment approach. Some cases show symptom improvement within a few weeks, but a full course of treatment and monitoring may take several weeks to months. Follow your veterinarian's instructions regarding return visits.

Does every case of nasal aspergillosis require surgery?

Not necessarily. Some cases can be managed with medication alone or endoscopic debridement. Complex or deep lesions may require surgical assessment and intervention; your veterinarian will determine the best approach based on examination findings.

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

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

Nasal aspergillosis is common in medium to large-breed dogs, causing nosebleeds and nasal discharge; antifungal treatment is required

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap editorial team

Sources: Merck, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek immediate veterinary care (emergency)

•Frequent open-mouth breathing that will not settle
•Heavy, continuous nosebleeds that will not stop
•Pale complexion, extreme weakness, or fainting

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

•Repeated or increasing sneezing lasting several days
•Increased nasal discharge, often thick or streaked with blood
•Flinching away or showing obvious pain when the nose is touched

01What Symptoms Indicate a Problem?

Nasal aspergillosis affects the nasal cavity or sinuses, causing changes in breathing and behaviour. Below are common visible signs and warnings.

Repeated sneezing or a noticeable increase in sneeze frequency
Increased nasal discharge, often thick or tinged with blood
Flinching or showing pain when the nose or face area is touched
Changes in breathing sounds, with occasional open-mouth breathing or wheezing
Decreased appetite and significantly reduced activity level

Seek emergency care immediately if you notice the following symptoms:

⚠️ Difficulty breathing or frequent open-mouth breathing
⚠️ Heavy or persistent nosebleed that does not stop

02How to Assess Abnormalities at Home? Key Observations and Emergency Guidelines

Monitoring and recording observations at home helps the veterinarian assess disease progression and plan an appropriate examination.

Record the date symptoms first appeared and track how they change over time
Observe daily alertness and activity level for any differences
Note changes in appetite and actual food intake
Observe whether urination and defecation are normal and note any abnormalities
Measure and record body weight and daily water intake changes
Take videos of sneezing episodes, nasal discharge, or abnormal breathing, and photos of the nose
Bring all records and videos to the veterinary appointment

03How Will the Vet Diagnose This? Common Diagnostic Tests

The veterinarian will combine physical examination with imaging and laboratory tests to confirm the cause and assess the extent of the lesion.

Physical examination

assess nasal appearance, palpation, and breathing

X-ray

evaluate structural changes in the nasal cavity and sinuses

Nasal tissue biopsy or brush cytology for microscopic examination

Bacterial and fungal culture to identify the causative organism

Blood tests and serology to assess overall health status

CT scan

evaluate the extent of deep or complex lesions

04How Is This Treated and Managed After Diagnosis? Medications, Diet, and Care Guide

Treatment may include surgical debridement and medications; post-operative and outpatient follow-up are essential steps for ensuring full recovery.

Surgical debridement or removal of infected tissue when necessary
Hospitalisation for respiratory stabilisation, pain management, and complication monitoring
Drug therapy adjusted based on test results (e.g. culture findings)
Nutritional support and dietary adjustments to promote recovery
Regular follow-up visits to check the wound, nasal condition, and imaging
Home care includes cleaning the nasal area and monitoring for symptom changes

05What to Prepare Before Seeing the Vet? Key Information to Help Your Vet Diagnose Quickly

Compile a record of when symptoms started, their frequency, and how they have changed

Bring a brief log of daily diet, bowel movements, and body weight

List all current medications, supplements, and any known allergy history

Take videos of sneezing, nasal discharge, or abnormal breathing sounds, and photos of the nose

Bring any existing test reports or images (e.g. X-rays, CT scans)

Use a secure carrier and cover it with a towel to reduce stress during transport

Share all records and videos with the veterinarian at the appointment

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.