About this Research Topic
For Johne’s disease, the available commercial vaccines consist of whole-cell preparations in one form or another. But with the ability to generate directed knockouts of specific genes, a number of defined mutants have been constructed in a few laboratories. These should be tested and directly compared with each other and alongside commercial vaccine formulations to determine not only which vaccine is most protective, but which animal model is best for predicting protection in the target host. To this end, there has been a nation-wide, multi-institutional effort to test the best live, attenuated vaccine against Johne's disease in cattle, sheep and goats. This vaccine trial has spanned six years and was conducted in three phases. The first phase examined attenuation in bovine macrophages, the second phase was colonization of spleen and liver in mice and the third phase was protection from bacterial challenge in goats. Many new ideas and retrospective approaches have emerged from this unprecedented effort. These aspects will be captured in this Research Topic.
In this Research Topic, we will seek articles on these above topics, but other issues surrounding vaccination of animals against mycobacteria will also be explored. These include immune parameters, correlates of protection, adjuvants and other vaccine formulations, etc.
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.