I suspect the parent's confusion is due to the misapplication of antibiotics to treat viral infections (it's not really clear if viruses are alive or what, but, don't take abx for a cold please). However, as you note, antibiotics do treat other things like yeast/microorganisms in addition to bacteria. For whatever reason you'll more often see antifungals described as "antifungal agents" rather than antibiotics.
Anyhow, fungal infection is bad news, often systemic, hard to eliminate.
Anyhow, fungal infection is bad news, often systemic, hard to eliminate.