We went out of town last week. Chemicals were in balance when I left. Someone who was house sitting came down with MRSA. We don't think it was from the pool because no one had been in the pool that has been sick and we honestly don't have many people in the pool. He had recently had physical therapy for shoulder surgery and we are thinking could have been from that. I just found out today it was MRSA and not just a random bug bite like he originally thought. Has anyone else dealt with this and if so what do you think I should do? I know staph and MRSA will not survive in a pool if the chorine and ph are in proper balance which when we left it was but I know it rained twice while we were gone so I don't know if the balance could have been thrown off enough to cause a problem. His son was in the water every day and has not gotten sick. Please advise!