NAC has been found to kill the Chlamydophila Pneumoniae elementary body which is sort of like the spore lifecycle stage of that bacterium.
I herxed pretty hard when I started taking 2400 mg daily NAC a few years ago, based on the protocol recommended at
cpnhelp.org.
I haven't herxed from NAC in a couple years so I think I no longer have much Cpn left. However I continue to take it as it will prevent any remaining Cpn bacteria from replicating, and its just generally good for detoxification.