A pathogen within the meaning of the TierSeuchErV is an agent capable of reproduction (virus, bacterium, fungus, parasite) or any other biological transmissible agent that can cause an infection or transmissible disease in humans.
Anyone wishing to bring pathogens into the area of application of the TierSeuchErV, export them, store them, deliver them or work with them requires permission from the competent authority.
Activities involving pathogens are not only those in which pathogens are deliberately propagated, but also those in which foodstuffs are merely examined for the absence of pathogens, with the possibility that potentially present pathogens may be propagated (e.g. laboratory diagnostic evaluation of PCR tests).
Activities involving pathogens that cannot be multiplied, in particular those that have been killed, are not subject to the permit requirement. The same applies to activities with test material that (possibly) contains pathogens, but these are not reproduced.
A permit is not required for anyone who works under the supervision of someone who has a permit or who, exceptionally, does not require a permit.
Exemptions from the permit requirement for certain groups of persons or certain activities are listed in § 3 TierSeuchErV.