Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)

<b>Background</b>: The close relationship between humans and petsraises health concerns due to the potential transmission of antimicrobial-resistant (AMR) bacteria and genes. Bacterial otitis is an emerging health problem in dogs, given its widespread prevalence and impact on animal welf...

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Main Authors: Biel Garcias, Mar Batalla, Anna Vidal, Inma Durán, Laila Darwich
Format: Article
Language:English
Published: MDPI AG 2025-03-01
Series:Antibiotics
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Online Access:https://www.mdpi.com/2079-6382/14/4/328
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author Biel Garcias
Mar Batalla
Anna Vidal
Inma Durán
Laila Darwich
author_facet Biel Garcias
Mar Batalla
Anna Vidal
Inma Durán
Laila Darwich
author_sort Biel Garcias
collection DOAJ
description <b>Background</b>: The close relationship between humans and petsraises health concerns due to the potential transmission of antimicrobial-resistant (AMR) bacteria and genes. Bacterial otitis is an emerging health problem in dogs, given its widespread prevalence and impact on animal welfare. Early detection of resistance is vital in veterinary medicine to anticipate future treatment challenges. <b>Objective</b>: This study aimed to determine the prevalence of AMR bacteria involved in 12,498 cases of otitis in dogs from the Iberian Peninsula and the evolution of AMR patterns over an 11-year period. <b>Methods</b>: Data was provided by the Veterinary Medicine Department of a large private diagnostic laboratory in Barcelona. Antimicrobial susceptibility testing was performed using the standard disk diffusion method and minimum inhibitory concentration (MIC) testing. <b>Results</b>: The frequency of the principal bacterial agents was 35% <i>Staphylococcus</i> spp. (principally <i>S. pseudointermedius</i>), 20% <i>Pseudomonas</i> spp. (<i>P. aeruginosa</i>), 13% <i>Streptococcus</i> spp. (<i>S. canis</i>), and 11% Enterobacterales (<i>Escherichia coli</i> and <i>Proteus mirabilis</i>). Antimicrobial susceptibility testing revealed <i>P. aeruginosa</i> (among Gram-negatives) and <i>Enterococcus faecalis</i> (among Gram-positives) as the species with the highest AMR to multiple antimicrobial classes throughout the years. According to the frequency and time evolution of multidrug resistance (MDR), Gram-negative bacteria like <i>P. mirabilis</i> (33%) and <i>E. coli</i> (25%) presented higher MDR rates compared to Gram-positive strains like <i>Corynebacterium</i> (7%) and <i>Enterococcus</i> (5%). The AMR evolution also showed an increase in resistance patterns in <i>Proteus</i> spp. to doxycycline and <i>Streptococcus</i> spp. to amikacin. <b>Conclusions</b>: This information can be useful for clinicians, particularly in this region, to make rational antimicrobial use decisions, especially when empirical treatment is common in companion animal veterinary medicine. In summary, improving treatment guidelines is a key strategy for safeguarding both animal and human health, reinforcing the One Health approach.
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spelling doaj-art-a6e214fd39e94f069c29cf4cc50b16662025-08-20T03:14:17ZengMDPI AGAntibiotics2079-63822025-03-0114432810.3390/antibiotics14040328Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)Biel Garcias0Mar Batalla1Anna Vidal2Inma Durán3Laila Darwich4Department of Sanitat i Anatomia Animals, Veterinary Faculty, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, SpainDepartment of Sanitat i Anatomia Animals, Veterinary Faculty, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, SpainDepartment of Sanitat i Anatomia Animals, Veterinary Faculty, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, SpainDepartamento de Veterinaria de Laboratorios Echevarne, 08037 Barcelona, SpainDepartment of Sanitat i Anatomia Animals, Veterinary Faculty, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain<b>Background</b>: The close relationship between humans and petsraises health concerns due to the potential transmission of antimicrobial-resistant (AMR) bacteria and genes. Bacterial otitis is an emerging health problem in dogs, given its widespread prevalence and impact on animal welfare. Early detection of resistance is vital in veterinary medicine to anticipate future treatment challenges. <b>Objective</b>: This study aimed to determine the prevalence of AMR bacteria involved in 12,498 cases of otitis in dogs from the Iberian Peninsula and the evolution of AMR patterns over an 11-year period. <b>Methods</b>: Data was provided by the Veterinary Medicine Department of a large private diagnostic laboratory in Barcelona. Antimicrobial susceptibility testing was performed using the standard disk diffusion method and minimum inhibitory concentration (MIC) testing. <b>Results</b>: The frequency of the principal bacterial agents was 35% <i>Staphylococcus</i> spp. (principally <i>S. pseudointermedius</i>), 20% <i>Pseudomonas</i> spp. (<i>P. aeruginosa</i>), 13% <i>Streptococcus</i> spp. (<i>S. canis</i>), and 11% Enterobacterales (<i>Escherichia coli</i> and <i>Proteus mirabilis</i>). Antimicrobial susceptibility testing revealed <i>P. aeruginosa</i> (among Gram-negatives) and <i>Enterococcus faecalis</i> (among Gram-positives) as the species with the highest AMR to multiple antimicrobial classes throughout the years. According to the frequency and time evolution of multidrug resistance (MDR), Gram-negative bacteria like <i>P. mirabilis</i> (33%) and <i>E. coli</i> (25%) presented higher MDR rates compared to Gram-positive strains like <i>Corynebacterium</i> (7%) and <i>Enterococcus</i> (5%). The AMR evolution also showed an increase in resistance patterns in <i>Proteus</i> spp. to doxycycline and <i>Streptococcus</i> spp. to amikacin. <b>Conclusions</b>: This information can be useful for clinicians, particularly in this region, to make rational antimicrobial use decisions, especially when empirical treatment is common in companion animal veterinary medicine. In summary, improving treatment guidelines is a key strategy for safeguarding both animal and human health, reinforcing the One Health approach.https://www.mdpi.com/2079-6382/14/4/328antimicrobial resistanceotitisdogsIberian Peninsula
spellingShingle Biel Garcias
Mar Batalla
Anna Vidal
Inma Durán
Laila Darwich
Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)
Antibiotics
antimicrobial resistance
otitis
dogs
Iberian Peninsula
title Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)
title_full Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)
title_fullStr Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)
title_full_unstemmed Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)
title_short Trends in Antimicrobial Resistance of Canine Otitis Pathogens in the Iberian Peninsula (2010–2021)
title_sort trends in antimicrobial resistance of canine otitis pathogens in the iberian peninsula 2010 2021
topic antimicrobial resistance
otitis
dogs
Iberian Peninsula
url https://www.mdpi.com/2079-6382/14/4/328
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AT marbatalla trendsinantimicrobialresistanceofcanineotitispathogensintheiberianpeninsula20102021
AT annavidal trendsinantimicrobialresistanceofcanineotitispathogensintheiberianpeninsula20102021
AT inmaduran trendsinantimicrobialresistanceofcanineotitispathogensintheiberianpeninsula20102021
AT lailadarwich trendsinantimicrobialresistanceofcanineotitispathogensintheiberianpeninsula20102021