Sterility testing specific cases

Isolation does, however, not mean that access to the test system or their housing or treatment localities generally needs to be restricted, save in some special circumstances, and apart from what would be dictated by sound scientific reasons. An example in case would be the restrictions for the access to certain animal facilities Because of special requirements, e.g. because of a specific pathogen-free or even sterile environment, access to these may have to be limited to authorised persons only. 

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