positively regulates positively regulates catalytic activity positive regulation of catalytic activity positive regulation of catalytic activity in other organism involved in symbiotic interaction induction by symbiont of host catalytic activity up regulation by symbiont of host enzyme activity biological_process activation by symbiont of host enzyme activity GO:0043948 up-regulation by symbiont of host enzyme activity upregulation by symbiont of host enzyme activity activation of host enzyme activity Any process in which the symbiont activates, maintains or increases the frequency, rate or extent of host enzyme activity. The host is defined as the larger of the organisms involved in a symbiotic interaction. positive regulation by symbiont of host catalytic activity positive regulation by symbiont of host enzyme activity modulation by symbiont of host molecular function modulation by symbiont of host catalytic activity