How is chlamydial conjunctivitis diagnosed in felines?

Chlamydial conjunctivitis in felines is diagnosed primarily through the evaluation of clinical signs and cytology. The hallmark clinical signs often include conjunctival redness, swelling, and discharge, which are observed during a thorough ophthalmic examination. In many cases, the conjunctival sac may exhibit characteristic changes that suggest chlamydial infection, making the clinical signs critical for initial assessment.

Cytology plays an important role in confirming the diagnosis. A sample from the conjunctival sac can be taken and examined under a microscope, where the presence of Chlamydia felis can be identified through specific staining techniques. This dual approach—assessing clinical signs alongside cytological evaluation—provides a reliable means of diagnosis.

Other methods, such as blood tests or radiography, do not contribute effectively to the diagnosis of chlamydial conjunctivitis. Blood tests typically provide information on systemic conditions rather than localized conjunctival infections. Similarly, radiography is not applicable for diagnosing conjunctivitis, as it is used more for assessing underlying structural issues or other diseases not related to conjunctivitis. While clinical history provides context, it alone is insufficient for a definitive diagnosis without corroborative clinical signs and cytology.