Fig. 3

A Chao1 indices of farrowing houses, sow barns, and living areas before and after disinfection. B Shannon index of farrowing houses, sow barns, and living areas before and after disinfection. C Chao1 index of the bacterial flora at each sampling site. D Shannon indices of the bacterial flora at each sampling site. E Principal coordinate analysis of each sample type before and after disinfection. F Analysis of the principal coordinates of sow barns before and after disinfection