MG (CRD) or mycoplasmais a common respiratory disease in all poultry. It is contagious to all other poultry, and can make carriers of the whole flock for life. Tylan 200 injectable can be given by mouth or by injection into the breast muscle once or twice a day for 3-5 days. Dosage is 1/4 ml per pound of weight. Tylan 50 may also be used orally at 1ml per pound, but since turkeys weigh more than chickens, the Tylan 200 is more economical. Tylan also comes in powder form for use in the water.
Duramycin 10 and oxytetracycline, Gallimycin are also frequently used to treat symptoms. Most of those drugs have a withdrawal time for meat consumption between 7 and 21 days, depending on which is used. Here is a good link about MG:
http://www.merckvetmanual.com/mvm/p...lasma_gallisepticum_infection_in_poultry.html
http://edis.ifas.ufl.edu/ps044