Final answer:
The predisposing condition for furunculosis is poor hygiene.
Step-by-step explanation:
Furunculosis, also known as boils, can be caused by certain predisposing conditions. One of the predisposing conditions for furunculosis is poor hygiene. Poor hygiene can lead to the accumulation of bacteria on the skin, which can then infect the hair follicles and cause furuncles. Other predisposing conditions include sharing athletic equipment, having poor nutrition, living in close quarters, and having a weakened immune system.