What to Do When the Investigators Knock . . .
This week brought news of yet another nationwide Salmonella outbreak from a source not yet identified by government regulators. The last time we had a nationwide Salmonella outbreak for an extended period of time without identification of a definitive source the federal government initially singled out tomatoes imported from Mexico (a huge array of products). In that case, the government was wrong and wreaked financial havoc on many farmers and businesses.
So far, in the current outbreak, nothing more specific than “poultry, eggs and cheese” have been identified as possible sources. Last year’s outbreak involved Salmonella Saintpaul whereas the current outbreak is Salmonella Typhimurium, which is more commonly associated with poultry, eggs and cheese, but could come from almost anything.
That a source has yet to be identified to the media doesn’t mean that state and federal officials aren’t zeroing in on possible sources. Restaurant owners, retailers and food manufacturers should be ready for the regulators when they come knocking.
In the past, I’ve had clients who were worked over aggressively by regulators (especially federal officials) who were investigating a large, nationwide outbreak with an uncertain cause. These officials face enormous pressure from those in Washington and from the public. Federal officials can make demands that threaten an entire business. They can demand credit card receipts, contact information for customers, personal employee information, shutdown of the business and more. Noncompliance might mean the officials will go to the press and advertise that the business is a target of the investigation. Unlike local health officials, who are usually vested in the well-being of local food producers under their jurisdiction, federal officials may care only about the investigation and nothing else.
Any food business should implement its crisis response team the minute it suspects it could be targeted in an investigation like the one that is currently ongoing. Specialists in food safety and foodborne illness investigations, genetic microbiologists, public relations experts, accountants, quality assurance personnel, purchasing personnel and lawyers should be lined up and ready to go. Events may unfold quickly for your business (over the course of a day or even a morning). Everything needs to be done at that moment to assist a business in navigating what may appear to be an impossible crisis.
Is It Really A Food-Borne Illness?
At a recent presentation, Dr. Alan Melnick, a public health officer in both Oregon and Washington, provided a useful list of alternative causes of symptoms to consider when someone claims a food-borne illness. Other causes of symptoms that might be confused for food-borne illness include (but may not be limited to):
- Irritable bowel syndrome (IBS)
- Inflammatory bowel disease
- Malignancies
- Antibiotic use
- Gastro-intestinal surgery or radiation
- Malabsorption syndromes
- Immune deficiency
Another practical piece of advice offered by Dr. Melnick: When assessing a food-borne illness claim, determine whether the incubation period is compatible with the illness. Incubation periods (along with other useful information) were provided by Dr. Melnick (relying upon the CDC) as follows:
|
Pathogen |
Incubation |
Symptoms |
Duration |
Source |
| Bacillus cereus |
1-6 hours (vomiting); 6-24 hours (diarrhea) |
Nausea and vomiting or colic and diarrhea | 24 hours (short form); 24-48 hours (long form) | Soil organism found in raw, dry and processed foods, e.d. rice |
| Campylobacter | 2-10 days; usually 2-5 days | Diarrhea, cramps, fever and vomiting; diarrhea may be bloody | 2-10 days | Raw and undercooked poultry, unpasteurized milk, water |
| Clostridium botulinum (botulism) | 2 hours to 8 days; usually 12-48 hours | Vomiting, diarrhea, blurred vision, double vision, difficulty swallowing, descending muscle weakness | Variable (days to months) | Home-canned food, improperly canned commercial foods |
| Clostridium perfringens | 6-24 hours | Cramps, diarrhea | 24-48 hours | Meats, poultry, gravy; foods kept warm |
| Enterro-hemorrhagic E. coli, including E. coli O157:H7 and other Shiga toxin-producing E. coli (STEC) | 1-10 days; usually 3-4 days | Diarrhea, frequently bloody; abdominal cramps (often severe); little or no fever; 5-10% develop Hemolytic-uremic syndrome (HUS) and average of 7 days after onset, when diarrhea is improving (more common in children, elderly and immune-compromised) | 5-10 days | Ground beef, unpasteurized milk and juice, raw fruits and vegetables, contaminated water, sprouts, person to person |
| Listeria | 9-48 hours for GI symptoms; 2-6 weeks for invasive disease | Fever, muscle aches and nausea or diarrhea; pregnant women may have flu-like illness and stillbirth; elderly, immune-compromised and infants infected from mother can get sepsis and meningitis | Variable | Fresh soft cheeses, unpasteurized or inadequately pasteurized milk, ready-to eat deli meats and hot dogs |
| Salmonella | 6 hours to 10 days; usually 5-48 hours | Nausea, diarrhea, cramps, fever | 4-7 days | Poultry, eggs, meat, unpasteurized milk or juice, raw fruits and vegetables (e.g., sprouts), person to person |
| Shigella | 12 hours to 6 days; usually 2-4 days | Abdominal cramps, fever and diarrhea; stool may contain blood and mucus | 4-7 days | Contaminated food or water, raw foods touched by food workers, raw vegetables, egg salads, person to person |
| Staph (toxin) | 30 minutes to 8 hours; usually 2-4 hours | Nausea, cramps, vomiting, diarrhea | 24-48 hours | Custards, cream fillings, potato or egg salad, sliced meats |
| Vibrio cholerae | 1-5 days | Profuse watery diarrhea and vomiting, severe dehydration | 3-7 days | Contaminated water and shellfish, street vended food |
| Vibrio parahaemolyticus | 4-30 hours | Watery diarrhea, abdominal cramps, nausea, vomiting | 2-5 days | Undercooked or raw seafood (fish and shellfish) |
| Vibrio vulnificus | 1-7 days | Vomiting, diarrhea, abdominal pain; more severe in patients with liver disease or who are immune-compromised; can cause invasive infection (sepsis) | 2-8 days | Raw seafood, particularly oysters, harvested from warm coastal waters |
| Yersinia | 1-10 days; usually 4-6 days | Appendicitis-like symptoms (diarrhea and vomiting, abdominal pain) | 1-3 weeks | Undercooked pork, unpasteurized milk, contaminated water |
