THEME: Food Safety


Chemical-free food safety approach to mitigate Listeria in food processing environment

Gay Lea Foods Co-operative Ltd, Mississauga ON



Dr. Hany Anany, Agriculture and Agri-Food Canada Guelph Research and Development Centre, Guelph ON

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2018 - 2023




A Canadian dairy co-operative has teamed up with Agriculture and Agri-Food Canada to develop a chemical-free way to prevent the risk of Listeria in food processing environments.

Listeria monocytogenes is one of the most common food safety risks for humans, and many outbreaks of Listeria-associated foodborne illnesses have been traced back to fresh and ready-to-eat foods like dairy, meat, eggs, vegetables and seafood. And although the incidence rate in Canada is relatively low, improving food safety is an ongoing goal of the country’s food and beverage processing sector.

Effective sanitation is key to controlling Listeria in processing environments, but this currently involves the use of strong chemicals that can have a negative impact on the environment as well as lead to the  development of antimicrobial resistance.

Research scientist Dr. Hany Anany of Agriculture and Agri-Food Canada’s Guelph Research and Development Centre is working with Gay Lea Foods to identify and test the effectiveness of natural antimicrobial agents – lytic bacteriophages or bacterial viruses that will specifically target only Listeria bacteria without harming other beneficial species.

“We take sanitation very seriously; we are also attentive to consumer demand for food safety as well as their growing preference for natural products. We know there is data available on using biological agents to reduce pathogenic bacteria in various stages of food production,” explains Anilda Guri, Senior Research Scientist at Gay Lea Foods. “So, we took this opportunity to be the first ones in dairy to support this type of research. This is not a mitigation situation, but a way to be proactive for the future.”

Anany’s research involves identifying different naturally occurring Listeria phages and evaluating how well different combinations of those phages reduce the growth of Listeria in a dairy processing environment.

The goal is to have a new biosanitation agent that can be used to sanitize equipment, food contact surfaces and drains in food processing plants. This will be an environmentally conscious solution that will be an effective alternative to antimicrobial agents.

“Finding green alternatives that will help promote natural compounds to eradicate or control Listeria is very forward-looking on the part of Gay Lea Foods,” says Anany. “More ecofriendly alternatives will result in better productivity and better quality in the Canadian food processing sector – and this approach can be expanded to other bacteria in the food industry beyond the dairy sector.”

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What does this project mean to Canada’s

food processing industry?

It is anticipated this innovation will enable food and beverage processors to satisfy consumer demand for more natural antimicrobial agents and can be expanded beyond Listeria to address bacteria-driven food safety concerns across the broader food processing sector.

FOOD SAFETY: This will provide a natural way to sanitize food processing environments to ensure the  ongoing high standards of food safety that consumers expect.

HEALTH: Reducing incidences of Listeria-associated foodborne illness will improve human health and reduce the impact of illness on the economy.


ENVIRONMENT: Bio-based or natural sanitation agents are less harmful to the environment than chemical products currently being used.

About Gay Lea Foods Co-operative Ltd.

Gay Lea Foods is a leading Canadian co-operative. Dedicated to innovation, the development of high-quality products and growing the market for Canadian milk, the co-op is 100% Canadian-owned with members on more than 1,400 Ontario and Manitoba dairy farms. The company’s award-winning products include: butter, sour cream, whip cream, cheese and cottage cheese.

About the project team

Dr. Hany Anany is a research scientist in bacteriophage biology and application with Agriculture and Agri-Food Canada’s Guelph Research and Development Centre. He holds a BSc and an MSc in Microbiology from Ain Shams University in Egypt and a PhD in Food Microbiology from the University of Guelph.

Dr. Anilda Guri is a senior research scientist with Gay Lea Foods, with an MSc in Natural Products and Biotechnology from the Mediterranean Agronomic Institute of Chania in Greece and a PhD in Applied Chemistry from the Agricultural University of Tirana in Albania. She has also completed postdoctoral research on dairy structures at the University of Guelph’s Department of Food Science.