Neorickettsia

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Neorickettsia is a genus of bacteria that live inside the body's immune cells (monocytes and macrophages) of dogs, horses, bats, and humans. They are small and can have different shapes.

Several Neorickettsia species cause disease:

- Neorickettsia sennetsu — Sennetsu ehrlichiosis. It is transmitted by flukes (trematodes) that come from fish.

- Neorickettsia risticii — Potomac horse fever, a disease of horses.

- Neorickettsia helminthoeca — Causes salmon poisoning disease in dogs and other canids; linked to the fluke Nanophyetus salmincola.

- Neorickettsia elokominica — Elokomin fluke fever in canids and other species.

Neorickettsia belongs to a group of bacteria called Alphaproteobacteria, within the order Rickettsiales.