Answer:
obligate intracellular organisms, such as chlamydias, rickettsias, and viruses
Explanation:
Obligate intracellular organisms are those living organisms that cannot reproduce outside their host cells. They require intracellular resources of the host in order to live normally and reproduce.
As a result, these type of organism cannot be cultured using ordinary culture media in the laboratory. They will require special intracellular-like resources in order for them to be successfully cultured in the laboratory.
