Characterisation of Isolates in the Czech Republic Collected from Diseased Pigs in the Years 2018-2022.

As in other countries, in the Czech Republic, infection in pigs is considered an economically significant disease for the pig industry, though little is known about its population structure. We collected isolates from 144 farms in the years 2018-2022. All samples were taken from animals suffering from symptoms indicating possible infection.

Resistance of Isolates from the Czech Republic during 2018-2022.

A determination of susceptibility/resistance to antimicrobials via serotype was carried out in 506 field isolates of , originating from pig farms in the Czech Republic in the period 2018-2022. A very high level of susceptibility of isolates was found to amoxicillin, in combination with clavulanic acid and sulfamethoxazole potentiated with trimethoprim. None of the tested isolates were resistant to these antimicrobial substances.