obsolete regulation by host of cytolysis of symbiont cells https://github.com/geneontology/go-ontology/issues/13041 true GO:0051839 biological_process This term was obsoleted because it has been used inconsistently. OBSOLETE. Any process in which an organism modulates the frequency, rate or extent of the cytolysis by that organism of cells in its symbiont organism. The symbiont is defined as the smaller of the organisms involved in a symbiotic interaction.