Fig. 1From: Occurrence of Pasteurella multocida among pigs with respiratory disease in China between 2011 and 2015Distribution of P. multocida isolates by the sampling month between February 2011 and October 2015. The isolation rates were 19/222, 20/253, 22/296, 25/297, 21/233, 38/332, 28/303, 24/280, 21/217, 21/260, 29/281, and 28/238 for months 1–12, respectively. The isolation rates given are the average isolation rates per month over the 5-years study period. The highest isolation rates were recorded in month 12, followed by months 6, 11, and 9. However, as a whole, differences in the isolation rates were not significant (p > 0.05). Statistical analysis was performed using the χ 2 testBack to article page