Here's a breakdown:
* Intracellular: Means "within the cell".
* Pathogen: A microorganism that can cause disease.
Some examples of intracellular pathogens include:
* Viruses: These are obligate intracellular parasites, meaning they can only replicate inside a host cell.
* Bacteria: Some bacteria, like *Chlamydia* and *Mycobacterium*, are also intracellular pathogens.
* Protozoa: Certain protozoa, like *Toxoplasma gondii* and *Plasmodium falciparum* (malaria), can live inside cells.
These pathogens have evolved mechanisms to evade the host's immune system and exploit cellular resources for their own replication.
