Fungal Keratitis in Llamas: Keratomycosis and Deep Corneal Infection

Fungal keratitis, also called keratomycosis, is an infection of the cornea, the clear front surface of the eye. In llamas and other camelids, it can involve a surface ulcer, a deeper stromal infection, or a stromal abscess hidden under healing tissue. Merck notes that fungal keratitis is fairly common in camelids and may present with stromal abscesses, stromal ulcers, corneal perforation, nonulcerative keratitis, and severe blepharospasm.

This is not a minor eye irritation. The cornea is very sensitive, and fungal infection can trigger intense pain, inflammation, corneal edema, and tissue breakdown. In some cases the cornea begins to "melt" as enzymes damage the tissue, making the eye much more fragile.

Llamas may develop fungal keratitis after a scratch from hay, bedding, or plant material, or after another corneal ulcer becomes contaminated by fungi that are already present in the environment. Because deep infection can progress even when the surface looks small, early veterinary care matters.

With prompt treatment, some llamas keep useful vision and comfort. Delays raise the risk of scarring, rupture of the cornea, chronic pain, or loss of the eye. Your vet may also recommend referral to a veterinary ophthalmologist if the ulcer is deep, worsening, or not responding as expected.

Most cases start with corneal injury plus fungal contamination. Environmental fungi such as Aspergillus and Fusarium are well-recognized causes of veterinary keratomycosis, especially after trauma involving hay, dust, soil, or plant material. Merck describes fungal keratitis as a disease that commonly follows corneal injury, with fungi implanted into the cornea after trauma or after a contaminated ulcer begins to heal.

Camelids appear especially prone to significant corneal disease. Published camelid reports describe ulcers linked to plant foreign bodies, marked corneal edema after trauma, and severe progression in some alpacas. Merck also notes that fungal keratitis is fairly common in camelids, which supports a high index of suspicion when a llama has a painful ulcer or stromal abscess.

Other factors can increase risk. Delayed treatment of a corneal ulcer, prolonged topical steroid exposure, chronic eye irritation, poor tear film, and contaminated environments may all make fungal invasion more likely. In rare cases, deeper fungal disease can involve the eye from systemic infection, but most keratomycosis cases begin as a local corneal problem.

Because the exact organism and depth of infection matter, your vet will not want to guess. A llama with a painful, cloudy eye needs an exam to separate fungal keratitis from bacterial ulceration, trauma alone, uveitis, foreign body injury, or other eye emergencies.

Diagnosis starts with a careful eye exam. Your vet will usually look for blepharospasm, discharge, corneal edema, stromal loss, white blood cell infiltrate, keratomalacia, and signs of reflex uveitis. A fluorescein stain helps identify many ulcers, but some deep stromal abscesses or nonulcerative fungal lesions may stain poorly or not at all.

To confirm infection and guide treatment, your vet may collect corneal cytology and culture. Cytology can sometimes show fungal hyphae quickly, while culture helps identify the organism and may support medication choices. In difficult or deep cases, referral practices may use advanced imaging or in vivo confocal microscopy to help detect fungal elements within the cornea.

Your vet may also check for a foreign body under the eyelids, evaluate tear production, and assess the inside of the eye for uveitis or other complications. If the cornea is very fragile, they may limit manipulation to avoid rupture.

This is one reason eye emergencies should not be treated at home with leftover drops. Steroid-containing eye medications can make fungal and ulcerative corneal disease much worse. If your llama has a painful or cloudy eye, your vet needs to determine whether the problem is superficial, deep, infected, or at risk of perforation.

Prevention focuses on reducing corneal trauma and treating eye injuries early. Check llamas regularly for squinting, tearing, cloudy eyes, or discharge, especially during dusty seasons or when feeding coarse hay. Remove sharp plant material, improve feeder design if eye injuries are common, and keep bedding and handling areas as low-dust as practical.

Prompt care for any corneal ulcer matters. A small scratch can become infected with fungi from the environment, particularly when hay, soil, or plant debris are involved. If your llama has an eye injury, avoid using leftover eye medications unless your vet has confirmed what they are. Steroid-containing drops can worsen ulcerative and fungal corneal disease.

Good fly control and overall herd management may also help reduce irritation and self-trauma. If one llama has recurrent eye problems, ask your vet to look for eyelid abnormalities, foreign bodies, tear film issues, or environmental triggers that keep the cornea inflamed.

Not every case is preventable, but fast recognition makes a real difference. In camelids, painful corneal disease can progress quickly, so the safest rule is to treat a cloudy or squinting eye as urgent until your vet says otherwise.