Final answer:
Acne is the condition among the given options that is caused by the bacterium Propionibacterium acnes. Athlete's foot is fungal, shingles is viral, and bed sores have varied causes.
Step-by-step explanation:
The condition caused by bacteria among the options provided is acne. Acne is associated with the bacteria known as Propionibacterium acnes. Although common amongst teenagers due to hormonal changes, acne can affect individuals of all ages and can be influenced by several factors, including bacteria, hormones, and genetics. In contrast, athlete's foot is caused by a fungus, shingles is due to a reactivation of the varicella zoster virus, and bed sores (pressure ulcers) can have a variety of causes including prolonged pressure, but if infected, could involve bacteria.