Validation and verification are becoming new buzz words in the world of food microbiology, especially when it comes to quantitative and qualitative testing. This blog will focus on qualitative testing. Under a key Food Safety Modernization Act (FSMA) requirement, food manufacturers must ensure their matrices are tested using methods that have been validated by a recognized accrediting body for that particular food category. The main food categories found in International Standards Organization (ISO) and AOAC INTERNATIONAL guidelines are then further sub-categorized on the basis of broad food categories and microbial load and recovery. To validate a category of foods, one matrix from each sub-category must be tested according to recognized validation processes to ensure the method is applicable to all types of foods in that category. Therefore, when a non-validated matrix is being tested, it is highly recommended, and required through FSMA, that there be some type of verification conducted for qualitative testing before using the method. This is particularly important when results are to be used for regulatory purposes. Continue Reading
Viruses are a leading cause of foodborne illness in the United States. According to the Centers for Disease Control and Prevention (CDC), viruses account for more than 50% of foodborne disease. Annually, Norovirus causes about 21 million illnesses and contributes to about 70,000 hospitalizations and 800 deaths.
Norovirus and Hepatitis A are the two main viruses of concern for the food industry. Over the past several years, a number of Norovirus and Hepatitis A (HAV) outbreaks have been linked to a wide variety of foods, including berries, pomegranate seeds and oysters. While both viruses are transmitted via the fecal-oral route, they have very different durations and symptoms. Continue Reading