What starts in your mouth and travels to other parts of your body in your bloodstream?

• A. Bacteria
• B. Viruses
• C. Fungi
• D. Toxins

Answer: (A)

Bacteria from the mouth can enter the bloodstream when the protective barrier of the mouth is breached, such as during dental work, gum disease, or even vigorous brushing. Once in the circulation, these living microbes can travel to distant sites and cause infections elsewhere in the body. This makes bacteria the best fit for the scenario described, because they are microrganisms that can originate in oral habitats and spread systemically through the bloodstream. While viruses or fungi can also spread in blood, they are not as typically described as starting in the mouth and disseminating via circulation in the everyday context, and toxins are not living organisms traveling through the bloodstream from the mouth. Keeping good oral hygiene helps minimize this transient bacteremia and its potential complications.