My youngest is on antibiotics right now for this. He is sick, but he wasn't exposed to WC that I know of. But he is immune compromised and has asthma. They tested him for WC, but we haven't heard yet. Should hear tomorrow.
They only suggest treatment when it's a certain type, so I would give the antibiotics. With my child, this is the first time for antibiotics, so I am not worried about it.