Meghan,
You are correct. Chickens do carry staph. However, so do dogs, cats, and humans. About 1/3 of the human population carry staph as part of their skin flora. You come into contact with staph constantly throughout your day. When you have to be concerned is when you have come across a strain of staph that is antibiotic resistance (Methicillin Resistance Staph Aureus) or coagulase positive staph. Staph infections can cause minor skin infections like pimples, boils or even more severe skin issues such as cellulitis. Staph can also cause more serious infections like pneumonia, endocarditis and toxic shock syndrome in those individuals that have lowered immune systems, etc. In chickens, staph is the culprit for bumblefoot.
I guess the best advise that I can give you is to stay healthy. After contact with animals (and humans) wash you hands with soap and water. If you have open wounds, cover them up until they have started to scab over. If you notice any of your wounds turning red, swelling or draining, contact your doctor asap! I would recommend purchasing some surgical gloves at your local pharmacy to use when you are working with your animals if you have wounds on your hands. But the best advise I can give you is to relax. The chance of you getting a staph infection from your birds are pretty slim if you wash your hands frequently.
Alicia
(ICU nurse)