A process in which a symbiont interferes with, inhibits or disrupts a cytoplasmic pattern recognition receptor signaling pathway by reducing the activity of IRF7 (interferon regulatory factor-7). IRF7 a transcription factor in the RIG-I/MDA-5 signaling pathway. Viral infection triggers phosphorylation of cytoplasmic IRF7, which allows IRF7 to form a homodimer, migrate to the nucleus, and activate transcription of IFN-alpha and IFN-beta genes.
suppression by virus of host interferon regulatory factor 7 activity