The in vitro efficacy of eye drops containing a bacteriophage solution specific for Staphylococcus spp. isolated from dogs with bacterial conjunctivitis

Irish Veterinary Journal

Ireneusz Balicki¹  Ewa Poleszak²  Katarzyna Świąder²  Ewelina Pyzik³  Dagmara Stępień-Pyśniak³  Andrzej Wernicki³  Agnieszka Marek³  Anna Nowaczek³  Marta Dec³  Renata Urban-Chmiel³  Andrzej Puchalski³ 

[1] Department and Clinic of Animal Surgery, Faculty of Veterinary Medicine, Lublin, Poland;Department of Applied Pharmacy, Medical University of Lublin, Lublin, Poland;SubDepartment of Veterinary Prevention and Avian Diseases, Institute of Biological Bases of Animal Diseases, Faculty of Veterinary Medicine, University of Life Sciences Lublin, Lublin, Poland;

关键词: Antibiotic resistance;    Conjunctival diseases;    Experimental medicine;    Bacterial infections;    Ophthalmology;   

DOI  :  10.1186/s13620-020-00175-x

来源: Springer

【 摘 要 】

BackgroundThe purpose of the study was to evaluate the in vitro antibacterial effect of experimental eye drops with bacteriophages in elimination of Staphylococcus spp. isolated from dogs with bacterial conjunctivitis.. The bacterial material was collected from dogs with independent clinical signs of bacterial conjunctivitis. Staphylococcus spp. were identified by phenotypic and genotypic methods (MALDI-TOF MS mass spectrometry). Antibiotic resistance was determined by the disc-diffusion method. Phage activity (Plaque forming units, PFU) was determined on double-layer agar plates. Phages with lytic titres > 108 PFU were used to prepare eye drops. The stability of the antibacterial titre was evaluated for preparations stored in sealed bottles as well as after opening and reclosing.ResultsThe tests confirmed the occurrence of Staphylococcus spp. strains as etiological agents of bacterial conjunctivitis in dogs. A high percentage of strains were resistant to more than three antibiotics. The experimental phage eye drops used in the study exhibited 100% efficacy in vitro against the tested Staphylococcus isolates. Particularly noteworthy is the long duration of activity and constant antibacterial lytic titre of ≥108 PFU/mL of two eye drop solutions, nos. 7 and 12, after the bottle had been opened (21 days) and after hermetically sealed packaging (28 days) at 4–8 °C.ConclusionsThe results represent the first stage of research and require continuation in vivo. If positive effects are obtained in animals, the results can be used in applied research in humans and animals.

【 授权许可】

CC BY