what Bacteria is in butter
An example of this is the bacteria Pseudomonas. Psychotrophs are tested for, and the butter must be cleared before it can be sold. Other bacteria such as coliforms (eg E.coli) can grow in butter that is kept at room temperature, but this is usually a result of contamination from the manufacturing process.Butter that contain coliforms can not be sold according to industry standards.ut for the most part butter will keep just fine and the natural bacteria in it won't spoil it, just keep it covered to keep out foreign bacteria and fungus. Source(s): http://www.science-projects.com/dairybac... Macaca Â· 7 years ago. Thumbs up.