MicroRNA are intermediate signalling and functional molecules which get built inside of a cell. MicroRNA can "jump" normal DNA processes and make epigenetic changes on the fly. MicroRNA are associated with disease and with bacterial infections and could be a way for pathogens to alter and hijack metabolism.

Here is a supportive data:

"MicroRNAs are small, highly conserved non-coding RNA molecules involved in the regulation of gene expression. MicroRNAs are transcribed by RNA polymerases II and III, generating precursors that undergo a series of cleavage events to form mature microRNA."

NIH Study: MicroRNA: Biogenesis, Function and Role in Cancer https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3048316/

https://truemedx.com/blogs/about-truemedx