P. stuartii P. sneebia P. rettgeri P. rustigianii P. heimbachae P. burhodogranariea P. alcalifaciens Providencia is genus of Gram-negative, motile bacteria of the family Morganellaceae.

It was named after Providence, Rhode Island, where C. A. Stuart and colleagues studied these bacteria at Brown University.

For example Providencia sneebia is highly virulent, and infection always results in fly mortality.

[4] Alternatively, P. rettgeri displays an intermediate virulence wherein some individuals survive infection, while others perish.

The susceptibility to P. rettgeri is strongly tied to an allele of the antimicrobial peptide gene Diptericin.