Which group includes both human normal flora and pathogens?

The correct choice is mesophiles, which are organisms that thrive at moderate temperatures, typically between 20°C and 45°C. This temperature range is conducive to human life, making mesophiles particularly important in microbiology.

Human normal flora, often composed of beneficial bacteria residing in various body sites, predominantly consists of mesophilic organisms. These bacteria help maintain health by outcompeting pathogens, aiding in digestion, and synthesizing essential vitamins.

In addition to the beneficial microbes that constitute our normal flora, certain pathogenic bacteria are also mesophiles. These pathogens can cause diseases in humans and often exploit the same moderate temperature range to infect and proliferate within the host.

Understanding that both normal flora and pathogens can be classified as mesophiles is crucial for comprehending the dynamics of human microbiota and the potential for disease.