regulation of development of symbiont in host
Any process in which the symbiont regulates its progression from an initial condition to a later condition, within the cells or tissues of the host organism. This may (but not necessarily) include a filamentous growth form, and also can include secretion of proteases and lipases to break down. The host is defined as the larger of the organisms involved in the symbiotic interaction.
GO:0044145
modulation of formation of structure involved in a symbiotic process
is_a
GO:0044114
development of symbiont in host
regulates