Carriage Status of Cattle for Carbapenemase-Producing Acinetobacter baumannii and Pseudomonas aeruginosa: First Report from Türkiye

This study aimed to determine the existence of carbapenemase-producing Acinetobacter baumannii and Pseudomonas aeruginosa in dairy cattle and farm milk samples in Burdur city of Türkiye and to determine the effectiveness of field disinfectants against these isolates. Nasal and rectal swabs taken from a randomly selected total of 150 cows and farm milk samples taken from a randomly selected 150 farms were examined. Three Acinetobacter baumannii isolates possessing the OXA-91 variant of OXA-51-like and OXA-72 variant of the OXA-24/40-like subfamily carbapenemase genes were isolated from nasal swabs of three cows in a single farm. Carbapenemase-producing Pseudomonas aeruginosa was not detected from the swabs of the animals. Also, carbapenemase-producing Acinetobacter baumannii and carbapenemase-producing Pseudomonas aeruginosa were not detected in the farm milk samples. These three Acinetobacter baumannii isolates were also determined to be ADC-52 variants of chromosomal Class C beta-lactamase producers. In disinfectant sensitivity tests, the isolates could be killed within 10 minutes at most. In conclusion, this is the first study to describe a multidrug-resistant Acinetobacter baumannii isolate that co-produces OXA-91, OXA-72, and ADC-52 variant beta-lactamase enzymes in cattle in the world. Lastly, it was determined that disinfectant preparations (acid, alkaline, and chlorine based) used in the dairy farms in the same region were effective on the carbapenemase-producing Acinetobacter baumannii isolates detected.

Cite this article as: Pehlivanoglu, F. (2026). Carriage status of cattle for carbapenemase-producing Acinetobacter baumannii and Pseudomonas aeruginosa: first report from Türkiye. Acta Veterinaria Eurasia, 52, 0272, doi: 10.5152/actavet.2026.25272.