Bacterial staining and microscopic examination
According to previously published methods (Devriese et al., 2005; Song
et al, 2020), the pathogenic bacterial was cultured in glass dishes with
solid medium and the single colony was inoculated aseptically into the
clean glass slides, evenly smeared and fixed, then stained with Gram
staining reagents, and examined under a microscope for describing the
morphological characteristics of the pathogenic bacterial.