Diseases and Conditions: The Basics of Bacterial Conjunctivitis in Cats

Conjunctivitis, the inflammation of the conjunctiva—an essential tissue comprising part of the eye and eyelid—plagues both feline and human counterparts. For us, it's the white part of the eye. In the feline world, it's a common woe often stemming from infections or injuries.

Amongst the culprits, feline herpes virus takes the spotlight as the prime cause of most conjunctival infections in cats. Managing herpes-induced conjunctivitis necessitates a fusion of antibiotics and antivirals administered through eye drops and pills. Even cats inoculated against herpes can fall prey to conjunctivitis, as the vaccine doesn't avert herpes but alleviates its impact.

However, there's a twist: certain viral-induced conjunctivitis cases coincide with bacterial infections. Enter Chlamydia felis and Mycoplasma spp., two bacterial species notorious for catalyzing conjunctivitis in cats.

Chlamydia's Scarlet Mark

Chlamydial infections unleash redness, discharge, and teary excesses. Antibiotics are the silver lining here, coupled with treating all feline cohabitants due to asymptomatic carriers.

Mycoplasma: A Balancing Act

Mycoplasma, a tenant in every feline's eye, triggers infection when it overpopulates. Treatment mimics Chlamydia's course—antibiotics. However, the goal here isn't eradication, but rather restoring the bacterial balance to normalcy since complete elimination remains elusive.

A Shared Plight

Both cats and dogs confront bacterial and viral conjunctivitis. The most common ocular woe among feline cohorts, conjunctivitis's visitation is virtually inevitable, with most cats enduring it at least once. It's an equal-opportunity affliction, afflicting all breeds. Predilection skews toward juveniles and young adults.

A Canvas of Symptoms

Conjunctivitis's visual tale includes:

  • Crimson eyes
  • Rosy eyelids
  • Lid puffiness
  • Excessive blinking
  • Tearful eyes
  • Encrusted eyes
  • Overflowing tears
  • Squinting
  • Facial scratches to alleviate discomfort

Unraveling the Diagnosis

A veterinary ocular exam is the inaugural step, excluding other redness instigators like trauma. A cytology test—a microscopic analysis of irritated tissue scrapings—often unveils bacterial and inflammatory constituents. This swift test occurs in the clinic. PCR, another diagnostic avenue, pinpoints the specific pathogen but frequently requires external lab analysis.

Courting Recovery

Bacterial conjunctivitis bows to antibiotics—doxycycline takes the lead. Mycoplasma and Chlamydia, the usual bacterial suspects, succumb to doxycycline's might.

Peering into Tomorrow

Heeding treatment often quells infection and symptoms. However, if the eye still battles infection or appears askew, your veterinarian's counsel is paramount. Lingering bacterial skirmishes might arise from unidentified factors, warranting resolution before ocular harmony can be reinstated.

Guarding Against Tomorrow

While a vaccine exists for Chlamydophila felis, it's not a mandate. Consider it if your feline treads infection-prone grounds. As for Mycoplasma spp., its pervasive presence in feline eyes negates the vaccine.

A Road to Vigilance

To avert a contagion cascade, segregate afflicted felines from their unaffected counterparts, promptly escorting them to the veterinarian at the earliest sign of distress. In deciphering feline ocular woes, the key is swift intervention and a watchful eye.

Don't have a vet in your area yet? We can help you find a local veterinarian.

If you have more questions, the GeniusVets Telehealth platform will give you unlimited access to text and/or video calls with board-certified veterinarians! To learn more click here.