Disease-causing bacteria are classified as what type?

Disease-causing bacteria are categorized as pathogenic. This classification is based on their ability to cause illness or disease in a host organism. Pathogenic bacteria can invade the body, evade the immune system, and produce toxins that lead to various infections and health issues.

In contrast, coliforms and noncoliforms are terms that refer to groups of bacteria often associated with the presence of fecal contamination. While coliforms are generally considered indicators of water quality and potential contamination, not all coliforms are pathogenic. Nonpathogenic bacteria do not cause disease, which distinguishes them from pathogenic bacteria. Understanding these classifications is vital for assessing water safety and public health.