Evidence checklist
E. coli and HUS evidence checklist
An E. coli claim needs evidence of both the infection and its likely source. Clinical testing may identify Shiga toxin-producing E. coli, while public-health sequencing, interviews, traceback, and food or environmental samples may connect cases to a common exposure.
Bloody diarrhea, reduced urination, unusual bruising, severe fatigue, and other serious symptoms need prompt medical attention. Evidence collection must not delay care.
Published August 23, 2026 · Last reviewed August 23, 2026
Clinical and laboratory evidence
The most useful medical record identifies the organism or toxin, timing, complications, and treatment. A negative or incomplete test does not always resolve the issue, but it can make source proof more difficult.
- Stool and toxin testing: Culture, culture-independent panel, Shiga toxin result, serotype if known, and dates collected.
- Public-health laboratory: Whether an isolate was available, whole genome sequencing was performed, and a cluster code or case number was assigned.
- HUS and kidney records: Blood counts, hemolysis markers, kidney function, urine output, dialysis, transfusions, hospitalization, and nephrology follow-up.
Exposure history
Investigators consider the full exposure window rather than only the last meal. Food, animal, water, childcare, travel, and contact histories can reveal a shared route.
- Food history: Restaurants, groceries, ground beef, leafy greens, sprouts, unpasteurized products, leftovers, and dates consumed.
- Other exposures: Petting zoos, fairs, farms, animals, swimming water, private wells, childcare, sick contacts, and travel.
- Other ill people: Names, shared exposures, symptoms, onset dates, tests, and public-health contacts.
Product and purchase proof
Records tying a product or place to a date can support epidemiology and traceback. Preserve identifiers and original transaction data before packaging is discarded or digital histories expire.
- Receipts and orders: Store or restaurant receipt, card statement, delivery record, loyalty history, reservation, and menu item.
- Packaging and food: Brand, lot, use-by date, establishment number, photographs, and safely isolated leftovers.
- Agency records: Health-department interview, case number, outbreak notice, recall, product advisory, and later updates.
Long-term harm and loss
HUS and severe E. coli infection can require follow-up after discharge. A complete record tracks kidney, blood-pressure, neurologic, gastrointestinal, and functional consequences over time.
- Follow-up care: Nephrology, laboratory monitoring, blood pressure, medication, dietary restrictions, and future-risk counseling.
- Education and work: School absence, academic support, missed work, reduced duties, caregiver leave, and wage records.
- Family costs: Travel, lodging, meals, childcare, home support, insurance statements, and out-of-pocket medical expenses.
A safe preservation rule
Preserve; do not investigate at personal risk. Keep original files and objects, record where they came from, and avoid editing, repairing, washing, testing, returning, or posting them publicly. Do not record private conversations or enter property unless the law and the circumstances permit it.
This checklist is general information. An attorney can identify evidence held by other people, send a targeted preservation demand, and apply the law of the state where the event occurred.
Use the checklist with these guides
Getting it confirmed
The one thing that can only be done while someone is still ill.
Read thisWho's actually liable
Contamination usually starts at the farm or plant. So does the real coverage.
Read thisWhat these cases are worth
A wide range with a hard dividing line: HUS, or not.
Read thisThe deadlines
Years to file. Days to get the sample. Sixty days if a public body is involved.
Read thisDo not wait for records to disappear
A free review can identify the evidence controlled by a business, employer, platform, provider, or manufacturer and whether a preservation request is warranted.
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