Final answer:
Bacteria are least likely to be transmitted by maintaining good hygiene, such as hand washing, and using antibiotics properly to kill bacteria, although the risk of antibiotic-resistant strains exists. Practices that include proper hygiene and medical procedures effectively reduce bacterial transmission.
Step-by-step explanation:
Bacteria are least likely to be transmitted through practices that maintain good hygiene and minimize contact with bacteria. Hand washing is the single most effective behavior for preventing the spread of bacteria, as it can prevent the transfer of pathogens that might be present on the hands when someone touches their face or other surfaces. Additionally, the proper use of antibiotics can kill bacteria, though there is a risk of developing antibiotic-resistant bacteria which complicates treatment. It is also important to avoid activities that can lead to contamination, such as the use of non-sterile medical equipment which can introduce bacteria into the body. Practices that include proper hygiene and medical procedures are effective in reducing the likelihood of bacterial transmission.