Serologic testing performed for human and swine infectious agents in the laboratory evaluation of immune- mediated polyradiculoneuropathy among cases and controls.

Abbreviations: CI, confidence interval; OR, odds ratio.aBlood specimens were collected on 102 consenting participants in the Minnesota case-control study. Not all cases or controls had adequate specimen for the complete battery of blood tests performed.bDifferences between cases and controls were noted in the serology results for swine influenza virus and porcine hemagglutinating encephalomyelitis virus; however, these results accounted for cSerum was evaluated by commercially available (MP Diagnostics) and in-house enzyme immunoassays using recombinant ORF-2 and ORF-3 proteins as antigens. Stools from three IP cases were evaluated for HEV RNA by RT PCR, of which all were negative.