Membrane-bounded vacuole within a host cell in which a symbiont organism resides. The vacuole membrane is derived from both the host and symbiont.
Comment:
Note that this term does not have a relationship to 'vacuole ; GO:0005773' because it does not fit the definition of a vacuole; the parasitophorous vacuole was so named because it resembles a vacuole in the microscope.