What best defines anaerobic bacteria?

Anaerobic bacteria are best defined as bacteria that cannot survive in the presence of oxygen. These microorganisms thrive in environments devoid of oxygen and often utilize fermentation or anaerobic respiration to produce energy. Anaerobic bacteria can be found in various environments, including deep underwater, in soil, and within the intestines of animals. They play vital roles in processes such as decomposition and fermentation.

Understanding this characteristic is crucial in food safety and sanitation practices, as anaerobic bacteria can be responsible for foodborne illnesses, especially in improperly stored or preserved foods. This knowledge helps food managers implement proper handling and storage techniques to prevent microbial growth in food products.