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Prevalence And Antimicrobial Resistance Trends Of Canine Uropathogens In A Veterinary Teaching Hospital In Northern Italy: A 10-year Retrospective Study (2014-2023).

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Prevalence And Antimicrobial Resistance Trends Of Canine Uropathogens In A Veterinary Teaching Hospital In Northern Italy: A 10-year Retrospective Study (2014-2023).

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Prevalence and Antimicrobial Resistance Trends of Canine Uropathogens in a Veterinary Teaching Hospital in Northern

Filippo Tagliasacchi¹, Jari Zambarbieri¹, Guido Grilli¹

¹Department of Veterinary Medicine and Animal Sciences, University of Milan, 26900 Lodi, Italy.

Veterinary Sciences

|September 27, 2025

View abstract on PubMed

Summary

This summary is machine-generated.

Keywords:

AMR antibiotic dog resistance urinary tract infection urine culture

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Urinary tract infections (UTIs) in dogs are common. Amoxicillin-clavulanate and trimethoprim-sulfamethoxazole are effective first-line treatments, but amoxicillin alone is less so, based on local resistance patterns.

Area of Science:

Veterinary Medicine
Infectious Diseases
Antimicrobial Resistance

Background:

Urinary tract infections (UTIs) are a primary reason for antibiotic use in dogs.
The International Society for Companion Animal Infectious Diseases (ISCAID) recommends using local data for empirical antibiotic therapy.
Understanding local pathogen prevalence and resistance is crucial for effective treatment.

Purpose of the Study:

To evaluate uropathogen distribution and antimicrobial resistance trends in dogs.
To compare resistance patterns before and after the 2019 ISCAID guideline implementation.
To inform empirical antibiotic therapy choices for canine UTIs.

Main Methods:

Retrospective analysis of 201 positive urine cultures from dogs.

Data collected from a veterinary teaching hospital in northern Italy (2014-2023).

Assessment of bacterial isolates and their susceptibility to various antibiotics.

Main Results:

Escherichia coli was the most common isolate (47.5%).
High resistance to amoxicillin (62.4%) was observed.
Significant decrease in resistance to amoxicillin-clavulanate (52.6% to 25.6%) was noted post-2019.

Conclusions:

Amoxicillin monotherapy may be insufficient for empirical treatment of canine UTIs locally.
Amoxicillin-clavulanate and trimethoprim-sulfamethoxazole remain appropriate first-line choices.
Continuous local antimicrobial resistance surveillance is vital for antimicrobial stewardship.