regulates regulates modulation by symbiont of host cellular process intracellular transport modulation by symbiont of host intracellular transport Any process in which an organism modulates the frequency, rate or extent of the directed movement of substances within the cell or cells of the host organism. The host is defined as the larger of the organisms involved in a symbiotic interaction. modulation of host intracellular trafficking biological_process GO:0052038 modulation of intracellular transport in other organism involved in symbiotic interaction