Mycolasma ts vaccines - 20 years field experience, pen trials and myths

摘要

The recognition of Mycoplasma gallisepticum (MG) as a major cause of sickness in intensively farmed chickens led initially to two main approaches for control. First was antibiotics but the high failure rate of these chemicals to consistently eradicatethe organism was the initial major problem soon followed with acquired resistance and residue control. Secondly was the idea that mycoplasmas could be universally eradicated. This later idea was successfully done at the elite breeding level providing industry with free stock but horizontal transmission and fragmentation of the effort to eradicate resulted in less successful results at production levels.