carries a negative charge [cation=(+), anion=(-)] source: http://answers.yahoo.com/question/index?qid=20090126104442AAs64nS WATCH IN ORDER: VERY SIMPLE DIRECT STAIN PROCESS MORE DETAILED STAINING BACILLUS CEREUS Bacillus cereus is an endemic , soil -dwelling, Gram-positive , rod-shaped , beta hemolytic bacterium . Some strains are harmful to humans and cause foodborne illness , while other strains