In vitro efficacy of povidone iodine and hydroxyethyl cellulose, alone and in combination, against common feline
M R Pennington1, J A Capriotti2, G R Van de Walle1
1Baker Institute for Animal Health, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.
Abstract:
Infectious ocular disease, such as conjunctivitis, is common in cats and can be caused by several viruses and bacteria, either as a single infection or as co-infections. In this study, povidone-iodine (PVP-I), alone or compounded with hydroxyethyl cellulose (HEC), was investigated for its efficacy against these pathogens in vitro. Whilst PVP-I alone was effective at inhibiting feline herpesvirus type 1 (FHV-1), Chlamydia felis, and Mycoplasma felis, PVP-I with HEC exerted a synergistic inhibitory effect against FHV-1 and C. felis. In contrast, only minimal inhibition of feline calicivirus was observed. These results demonstrate that PVP-I, alone and in combination with HEC, is effective against some feline ocular pathogens when tested in cell lines in vitro. In vivo studies investigating the systemic safety, ocular tolerance, and clinical efficacy of this combination in cats would be necessary before it could be recommended as a therapy in affected cats.
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