Fig. 2

Temporal trends in antimicrobial resistance patterns of A. pleuropneumoniae isolates from northeastern Poland, 2019–2024. A The bubble chart displays the distribution of isolates by the number of antimicrobials they are resistant to over the study period. The size of each bubble represents the number of isolates with that specific resistance profile. B The scatter plot with a linear regression line illustrates the trend in the number of multi-resistant isolates over time. The red line represents the fitted linear model, with the shaded area showing the 95% confidence interval. C The line graph depicts the antibiotic resistance trends over time for seven key antibiotics. Each line represents a different antibiotic, showing the number of resistant isolates for each year from 2019 to 2024