How can the presence of pathogenic bacteria affect overall health?

Pathogenic bacteria are microorganisms that can cause disease and infections in the body. When these bacteria invade, they can multiply and disrupt normal bodily functions, leading to various health issues. These infections can manifest in numerous ways, including localized symptoms (like redness, swelling, and pain) or systemic symptoms (such as fever and fatigue), depending on the type of pathogenic bacteria and the area of the body that is affected.

The presence of pathogenic bacteria is a key factor in many illnesses, as they can compromise the immune system's ability to fight off other pathogens, leading to more significant health complications. This highlights the importance of maintaining proper hygiene and sanitation practices to minimize exposure to these harmful microorganisms.

Other options do not accurately represent the role of pathogenic bacteria in health. For instance, the assertion that pathogenic bacteria could cause a cold or promote wellness is misleading, as colds are typically caused by viruses, and pathogenic bacteria are generally associated with negative health impacts. Additionally, the claim that they can prevent infections contradicts the fundamental nature of pathogenic organisms, which are inherently linked to the onset of diseases.