https://www.vetsurgeon.org/f/clinical-questions/10549/conjunctivitis-and-ulcers-cats Apologies for a somewhat basic question - I&#39;m moving into small animal practice and I suspect things may have changed since I was a student! So, in a cat with conjuncitivitis and no corneal defects, what would be your first line Tx? I recall thaten-USTelligent Community 10https://www.vetsurgeon.org/thread/54141?ContentTypeID=1Mon, 30 Jan 2012 12:38:30 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:c9eccf82-7690-4254-8264-2afbc330eeb4Martin Atkinson<p>Chlamydia always starts as a&nbsp;unilateral&nbsp;conjunctivitis/chemosis which is far more severe than herpes conjunctivitis but will spread to the other eye within a few days, it is however rarely accompanied by flu symptoms. Herpes will start bilaterally with epiphera rather than chemosis accompanied by URTI. Some poor cats have both so it is IMO worth swabbing in every case because if is is Chlamydia then you can cure it with a 6 week course of doxycycline provide the cat is not constantly reinfecting from another cat. and nasty recurrent cases of FHV conjunctivitis can respond to anti-viral eye dops (I favour home-made Virbagen Omega drops). If I suspect Chlamydia but am not sure and can&#39;t swab or have to wait for results then I will use doxycycline and Fucithalmic eye ointment as the ointment will soothe the eyes and the dox will help prevent cats with FHV from developing a secondary bacterial infection.</p><div style="clear:both;"></div>