The unclean animals.

Animals get bacteria due to their diet, their habits, and unclean food resources.

In Judaism, cleanliness has nothing to do with it. These animals are unkosher. They are not "unclean." Unkosher animals are animals that are not fit to use as a food animal.

Gentiles

In various religious contexts, unclean animals are those that are considered impure or unfit for consumption based on religious laws or beliefs. These animals may include pigs, shellfish, and certain birds, among others. The classification of unclean animals varies among different religions and cultures.