Mycoplasma gallisepticum--control by immunization.
D000818:Animals; D001428:Bacterial Vaccines; D002353:Carrier State; D002645:Chickens; D007114:Immunization; D009175:Mycoplasma Infections / Q000517:prevention & control* / Q000662:veterinary; D011201:Poultry Diseases / Q000517:prevention & control*
D001428:Bacterial Vaccines