WASHINGTON, D.C. -- Food in the preharvest stage is more vulnerable to contamination than food in the processing and packaging stages of production, because of environmental variability and our inability to control it, according to a new report released by the American Academy of Microbiology. The report, "Preharvest Food Safety and Security," points out that recent outbreaks of a number of foodborne illnesses have been linked to contamination occurring in the preharvest stage of food processing. The report recommends creating an accessible international database of genetic sequences for known foodborne pathogens along with new and improved tools for detecting and cataloging pathogens on the farm.
The report is based on the findings of a colloquium convened by the AAM in Perthshire, Scotland, in December 2003. Scientific professionals with expertise in veterinary medicine, agriculture, plant science, food safety, and microbiology met to discuss current practices in preharvest food safety, problems posed by pathogens on the farm, research needs in the field, and communication and education priorities.
"No matter how meticulously food is handled, prepared, or cooked, pathogens acquired during preharvest cannot always be inactivated," according to Colloquium co-chair, Richard E. Isaacson, PhD, of the University of Minnesota. Many foods have a higher risk because they are consumed raw, as was the case recently in Pennsylvania where 650 fell ill and three died from an outbreak of hepatitis A from contaminated green onions that originated in Mexico.
Elimination of all foodborne pathogens is impossible, but the goal of preharvest food safety is to reduce the risk of foodborne illnesses by minimizing the number of pathogens in food and the frequency, extent, and distribution of such contaminants in the preharvest phase. The report recommends systematic surveillance, detection methods, risk assessment, and trade issues as the areas that should be emphasized to ensure safety during all stages of food production. "We need to take into account the risks that pose the biggest threats to the greatest number of people, which include pathogenic viruses in the production of shellfish, parasites from free range meat and poultry, and bacterial foodborne pathogens introduced by humans and animals," according to Colloquium co-chair, Mary Torrence, DVM, PhD, of the U.S. Department of Agriculture.
Colloquium participants discussed establishing implementation guidelines for the best management practices at the farm. These guidelines will minimize the contamination of livestock that produce pathogens that cause disease in humans. The report also recommends establishing specific criteria to measure the efficiency of preharvest intervention strategies. Communicating to the public and educating them about preharvest food safety is essential. "The public should be more informed about preharvest food safety while understanding that zero risk is unattainable, according to the report."
Source: American Society for Microbiology
Stay prepared and protected with Infection Control Today's newsletter, delivering essential updates, best practices, and expert insights for infection preventionists.
Reducing Hidden Risks: Why Sharps Injuries Still Go Unreported
July 18th 2025Despite being a well-known occupational hazard, sharps injuries continue to occur in health care facilities and are often underreported, underestimated, and inadequately addressed. A recent interview with sharps safety advocate Amanda Heitman, BSN, RN, CNOR, a perioperative educational consultant, reveals why change is overdue and what new tools and guidance can help.
New Study Explores Oral Vancomycin to Prevent C difficile Recurrence, But Questions Remain
July 17th 2025A new clinical trial explores the use of low-dose oral vancomycin to prevent Clostridioides difficile recurrence in high-risk patients taking antibiotics. While the data suggest a possible benefit, the findings stop short of statistical significance and raise red flags about vancomycin-resistant Enterococcus (VRE), underscoring the delicate balance between prevention and antimicrobial stewardship.
What Lies Beneath: Why Borescopes Are Essential for Verifying Surgical Instrument Cleanliness
July 16th 2025Despite their smooth, polished exteriors, surgical instruments often harbor dangerous contaminants deep inside their lumens. At the HSPA25 and APIC25 conferences, Cori L. Ofstead, MSPH, and her colleagues revealed why borescopes are an indispensable tool for sterile processing teams, offering the only reliable way to verify internal cleanliness and improve sterile processing effectiveness to prevent patient harm.
The Next Frontier in Infection Control: AI-Driven Operating Rooms
Published: July 15th 2025 | Updated: July 15th 2025Discover how AI-powered sensors, smart surveillance, and advanced analytics are revolutionizing infection prevention in the OR. Herman DeBoard, PhD, discusses how these technologies safeguard sterile fields, reduce SSIs, and help hospitals balance operational efficiency with patient safety.
Targeting Uncertainty: Why Pregnancy May Be the Best Time to Build Vaccine Confidence
July 15th 2025New national survey data reveal high uncertainty among pregnant individuals—especially first-time parents—about vaccinating their future children, underscoring the value of proactive engagement to strengthen infection prevention.