* Nutrients: Parasitic bacteria lack the ability to produce their own food and obtain nutrients by feeding on the host cell's resources.
* Shelter: They find protection and a suitable environment within the host cell.
* Reproduction: Parasitic bacteria often use the host cell's machinery to replicate themselves.
Parasitic bacteria can infect a wide range of eukaryotic host cells, including:
* Animals: Examples include *Salmonella*, *Chlamydia*, and *Mycobacterium tuberculosis*.
* Plants: Examples include *Agrobacterium tumefaciens* and *Xylella fastidiosa*.
* Protists: Examples include *Wolbachia* and *Rickettsia*.
It's important to note that not all bacteria are parasitic. Many are beneficial or harmless, and some even play essential roles in ecosystems.
