The Listeriaceae are a family of Gram positive bacteria.

Gram negative bacteria have two membranes, thus making secretion topologically more complex.

There are at least six specialized secretion systems in Gram negative bacteria.

The Turicibacteraceae is a family of Gram positive bacteria.

Gram positive bacteria are generally or moderately susceptible.

Caryophanaceae is a family of Gram positive bacteria.

Translocases are most common secretion system in Gram positive bacteria.

Peptostreptococcaceae is a family of Gram positive bacteria in the class Clostridia.

These mice were also found to be hypersusceptible to infection by Gram negative bacteria.

The latter are very widespread, but have been found only in Gram positive bacteria.