Fungal Keratitis in Llamas: Eye Infection, Corneal Ulcers, and Vision Risk

Fungal keratitis is an infection and inflammation of the cornea, the clear front surface of the eye. In llamas, it usually starts when the cornea is damaged by trauma, plant material, dust, or another ulcer, then fungi take advantage of that break in the surface. Once established, the infection can trigger deep inflammation, corneal melting, scarring, and sometimes rupture of the eye.

Although fungal keratitis is best described in horses and alpacas, the same corneal biology and risk factors apply to llamas. Camelids are prone to corneal disease, and one report noted that among llamas presented for eye disease, active corneal disease was common and ulcers made up more than half of those cases. That matters because fungal infection is one reason a corneal ulcer may become severe or fail to heal.

For pet parents, the key point is that this is not a wait-and-see problem. A llama with a painful, cloudy, or suddenly closed eye needs prompt veterinary care. Early treatment can preserve comfort and vision, while delays increase the risk of permanent opacity or loss of the eye.

Most cases begin with corneal injury. A scratch from hay, straw, seed heads, dust, fencing, or another animal can damage the corneal surface. Fungi are common in the environment, especially around plant material, so they can colonize that injured area before the eye fully heals. This is why a small abrasion can turn into a much more serious ulcer.

Other factors can make fungal infection more likely. A nonhealing ulcer, prolonged eye irritation, reduced tear protection, or prior use of steroid-containing eye medication can all lower the cornea's defenses. In veterinary ophthalmology, fungal keratitis is especially recognized after trauma involving plant material and in eyes with complicated ulcers.

Llamas and other camelids also live in environments where dust, bedding, forage, and wind can repeatedly irritate the eye. If a llama keeps rubbing a painful eye, that self-trauma can deepen the ulcer and make infection harder to control. In some cases, bacteria and fungi may both be present, so your vet may treat more than one problem at the same time.

Your vet will start with a careful eye exam. That usually includes checking the cornea, eyelids, conjunctiva, pupil, and the inside of the eye as much as the llama will allow. A fluorescein stain is commonly used to highlight a corneal ulcer and help estimate its size and shape. This is a basic but very important test because some ulcers are hard to see without stain.

If fungal keratitis is suspected, your vet may collect a corneal sample for cytology and sometimes culture. Cytology looks for fungal hyphae, yeast, inflammatory cells, and bacteria under the microscope. Culture can help identify the organism, although treatment often needs to start before final results return because delays can cost vision.

Your vet may also assess for deeper complications such as corneal melting, stromal abscess, uveitis, or perforation risk. In severe or unclear cases, referral to a veterinary ophthalmologist may be recommended for advanced imaging, repeated exams, or surgery. Because fungal keratitis can mimic or overlap with other causes of corneal disease, diagnosis is often based on the eye's appearance plus lab testing and response to treatment.

Prevention starts with reducing eye trauma. Check hay, bedding, feeders, fencing, and shelter areas for sharp plant stems, protruding wire, and dusty debris. During windy seasons or when feeding coarse forage, watch closely for tearing, squinting, or face rubbing. Catching a small eye injury early can prevent a deeper infected ulcer later.

Daily observation matters. If one eye suddenly looks more closed, watery, or cloudy than the other, arrange a veterinary exam promptly. Corneal ulcers are easier to treat before fungi or bacteria become established. Avoid using leftover eye medication unless your vet has confirmed it is appropriate, because some products contain steroids that can worsen corneal infection.

Good herd management also helps. Control flies, reduce overcrowding around feeders, and separate llamas that are rubbing or being bullied. For llamas with a history of eye problems, ask your vet whether protective management changes, faster rechecks, or referral are sensible if another eye injury occurs.