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Canine otitis externa caused by is a relevant disease in veterinary medicine. Given high priority status for the development of new antimicrobials, innovative strategies like bacteriophage therapy are essential. Lytic bacteriophages are viruses with high specificity for their bacterial hosts, making them a promising therapeutic choice in both human and veterinary medicine. This study aimed to evaluate the antimicrobial potential of bacteriophages JG005 and JG024, first characterized in terms of their biofilm-forming ability and antimicrobial susceptibility profile, against isolates obtained from dogs with otitis externa,. Bacteriophages titer, host range, and activity were assessed against biofilms via microtiter assays using crystal violet and Alamar Blue. JG024 showed lytic activity against 61.2% (n = 30/49) of the isolates, while JG005 showed lytic activity against 38.8% (n = 19/49) of the isolates. Crystal violet quantification showed that JG005 can promote strong microbial suppression of 60% (n = 6/10) and 50% (n = 5/10) of the isolates at a multiplicity of infection (MOI) of 10 and 100, respectively. JG024 presented strong microbial suppression of 20% (n = 2/10) of the isolates regardless of the MOI level tested. These phages show promising potential as an innovative treatment for canine otitis externa caused by , but further studies are needed before future clinical use.
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http://dx.doi.org/10.3390/vetsci12070646 | DOI Listing |
J Am Anim Hosp Assoc
September 2025
From Animal Dermatology Clinic, Marietta, Georgia (A.B., J.G.).
Dogs with hyperadrenocorticism (HAC) present to a referral dermatology practice with clinical signs that vary from the traditional HAC signs. This retrospective case series evaluates the presenting complaints, history findings, and physical examination findings in dogs diagnosed with HAC presenting to a referral dermatology practice. Medical records of 30 dogs diagnosed with HAC and evaluated at a private dermatology referral practice were retrospectively reviewed.
View Article and Find Full Text PDFJ Am Vet Med Assoc
August 2025
1Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, NC.
Objective: To describe topical aural products and antimicrobials prescribed or administered to Golden Retriever Lifetime Study (GRLS) participants with otitis externa (OE) and to characterize OE in this population.
Methods: GRLS participants with ≥ 1 veterinarian-determined OE diagnosis during years 1 to 8 of enrollment (n = 1,755) were included. Reports of veterinary-prescribed or owner-administered topical aural products were identified in GLRS records by study year, classified (eg, prescription, nonprescription, antibiotic, antifungal), tallied, and stratified by presence of an OE diagnosis.
Am J Vet Res
August 2025
Diagnostic Imaging Unit Anicura-ADVETIA Veterinary Referral Hospital, Vélizy-Villacoublay, France.
Objective: To describe the epidemiological characteristics and CT features in dogs with external ear canal (EEC) masses and assess the ability of CT to predict histopathological diagnosis.
Methods: This was a retrospective, single-center study including 70 dogs that underwent otoendoscopic examination, head CT imaging, and histopathological analysis. Masses were categorized into 5 groups according to histopathological diagnosis.
Vet Dermatol
August 2025
Clinic for Small Animal Internal Medicine, Vetsuisse Faculty, University of Zürich, Zürich, Switzerland.
Background: Recurrent otitis externa (OE) episodes commonly affect dogs with canine atopic dermatitis (cAD) despite ongoing cAD treatment.
Objective: To determine if a therapeutic diet with active ingredients targeting the skin barrier and allergy pathways reduces the incidence rate of OE.
Animals, Materials And Methods: Thirty-four client-owned dogs with active erythroceruminous OE + cAD (not necessarily active) were randomised to test (n = 16) or control diet (n = 18), fed for up to 6 months.
Vet Dermatol
August 2025
Department of Animal Medicine and Surgery, Veterinary Medicine School, Complutense University of Madrid, Madrid, Spain.
Background: Effective management of otitis externa (OE) requires addressing all contributing factors to prevent chronicity and recurrence. Evidence on the long-term efficacy of topical corticosteroids in preventing recurrence and secondary infections remains limited.
Objectives: This retrospective noncontrolled study evaluated the efficacy of hydrocortisone aceponate (HCA) in resolving non-infectious chronic or recurrent (CR)-OE with or without proliferative changes, and preventing recurrence of acute episodes and secondary infections.