Within this observed global trend, several bacterial species present small deviations from the average.

There are known bacterial species which exhibit increased resistance to the compound.

The ability to undergo natural transformation among bacterial species is widespread.

Of the 400 bacterial species in the gut, many have yet to be characterized.

Only four other bacterial species have been observed to contain both of these pathways.

The complete genome sequence for a large number of bacterial species is now available.

The digestive system is home to more than 500 different bacterial species.

The numbers of bacterial species are even harder to estimate.

This process occurs naturally in at least 40 bacterial species.

By itself, it is just one of countless bacterial species.