Multistate Salmonella Outbreak Investigator

📈 Epidemiological Curve (Onset Stratification)

◀ July 1: Index Case Identified July 28: Peak Notification August 18: Mandatory Facility Recall ▶

🥗 Case-Control Food Exposure Analysis Fisher's Exact / Wald 95% CI

Multivariate risk assessment across 431 laboratory-confirmed patient case interviews and 200 matched population controls.

Suspect Food Vehicle	Exposed Cases	Control Ill	Attack Rate	Odds Ratio (95% CI)	P-Value	Risk Assessment

Odds Ratio Forest Plot:

🔗 Supply-Chain Traceback & Cross-Contamination Vector FAC-709 / LOT-418

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Point of Service Retailers (186 Outlets across 28 States)

Confirmed consumer purchases linked to grocery chains and food service breakfast menus.

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Regional Distribution Hubs (Distributor East & Mid-Atlantic Logistics)

Cross-dock refrigeration logs confirm continuous cold chain compliance; point of origin convergence identified.

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Packaging & Grading Facility: FAC-709 (Central Farm Aggregate)

Lot ID: LOT-418 | Environmental Swabs: 18/22 Positive for Salmonella enterica serovar Enteritidis.

🧬 Genomic cgMLST Profile

Pathogen: Salmonella enterica

Serovar: Enteritidis

PulseNet Cluster: 2408MLEX-1

WGS cgMLST Distance: 0 - 2 Alleles

Isolates Sequenced: 431 / 431 (100%)

Antimicrobial Resistance: Susceptible to standard ciprofloxacin & azithromycin regimens.

Tight genomic clustering within ≤2 allele differences proves a single shared contamination point rather than diffuse background illnesses.

📋 Outbreak Telemetry & Actions

Action Notice: Primary suspect vehicle Grade A Shell Eggs (Lot 418) exhibits an odds ratio of 14.82 (p < 0.001). FDA & CDC recall enacted for Facility FAC-709.

Investigator Counterfactual Simulation:

📁 Surveillance Data Export Suite