Listeria is the name of a bacteria found in soil and water, and some animals, including poultry and cattle. It can be present in raw milk and food made from raw milk. The bacteria can also live in food processing plants and contaminate a variety of processed meats. John Nyambi, chair of the South African Institute of Environmental Health says the listeriosis bacteria adapts to various conditions in the environment.

John Nyambi, chair of the South African Institute of Environmental Health talking to Wandile Kallipa.