Which type of bacteria can cause disease?

Pathogenic bacteria are specifically those that are capable of causing disease in a host. They possess specific traits that allow them to invade host tissues, evade the immune system, and produce toxins that can lead to illness. These bacteria can be responsible for various infections and diseases ranging from mild to severe, impacting health significantly.

In contrast, non-pathogenic bacteria generally do not cause disease and can even be beneficial, playing roles in processes such as digestion or the maintenance of healthy skin flora. Antagonistic bacteria often inhibit the growth of harmful pathogens, contributing to a healthy balance in microbiological environments, while commensal bacteria live on or in a host without causing harm, and in some cases, they may even provide benefits. Understanding these distinctions is essential in the context of infection control, as it helps in identifying and managing potential health risks associated with bacterial infections.