Rather than citing "3 common sweetners", it would have been more helpful for the article to explicitly specify the sweeteners in question.
The study, published in the International Journal of Molecular Sciences, is the first to show the pathogenic effects of some of the most widely used artificial sweeteners—saccharin, sucralose, and aspartame—on two types of gut bacteria, E. coli (Escherichia coli) and E. faecalis (Enterococcus faecalis).
2nd sentence. Took me awhile to find them, too.