O-27 - Bulk raw eggs from NE pasteurization plants yielded SE 10% vs 0% elsewhere, tracking human illness geography
Direct microbiological confirmation that eggs themselves carried SE, geographically concordant with the human-illness pattern.
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Why this is evidence
Direct microbiological confirmation that eggs carry SE, geographically concordant with human illness (10% NE vs 0% elsewhere). Predicted by H-12 (eggs the vehicle) — if eggs were not the principal vehicle (H-58) the egg-culture positivity would not track the illness geography. Bulk raw egg pools cannot separate internal contents from shell surface, so it is diagnostic on magnitude but near-mute on the H-11 route facet.