Which type of bacteria is known to cause disease?

Pathogenic bacteria are the type of bacteria that are known to cause disease. They have mechanisms that allow them to invade host tissues, evade the immune response, and, in many cases, produce toxins that can harm the host. These bacteria can lead to a wide range of infections, from mild conditions like strep throat to severe diseases such as tuberculosis and meningitis.

In contrast, non-pathogenic bacteria play beneficial roles in various environments, including the human body, where they contribute to processes such as digestion and immune system functioning. Beneficial bacteria encompass those that are crucial for maintaining health and preventing disease rather than causing harm. Probiotic bacteria specifically refer to a subset of beneficial bacteria that are administered to enhance gut health and overall well-being. Hence, these categories of bacteria either contribute positively to health or are neutral but do not have disease-causing capabilities like pathogenic bacteria do.