Obligate Intracellular

Some articles on obligate intracellular, intracellular:

Pathogenic Bacteria - Diseases - Intracellular
... organisms invariably cause disease in humans, such as obligate intracellular parasites (e.g ... Still, infections with intracellular bacteria may be asymptomatic, such as during the incubation period ... An example of intracellular bacteria is Rickettsia ...