--have been known to occur soon after gastrointestinal (and other) infections. The infection is often referred to as the "prodrome"--the percipitating event.

This is most well documented in acute demyelinating neuropathies--most classically Guillain Barre syndrome--but is thought to be a possibility in other acute/subacute neuropathy onsets as well. The most common offenders (at least that are known and documented) are Campylobacter jejuni and Haemophilus influenzae.

You may have seen in the news lately that Zika virus has been implicated in the onset of Guillain Barre (as well as birth defects).