Ahead of the hunting season kicking off in earnest, Ospri and farmers are asking hunters to think again if they are considering illegally releasing and relocating deer into new areas.
Deer hunters can unintentionally spread bovine TB by moving/releasing deer from one area to another, Ospri said in a statement.
Ospri said it had worked hard to eradicate TB in possums from large areas of New Zealand over the years.
This work could be undone by the reintroduction of TB infected deer with the potential of spillback of infection into the possum population.
Waikato farmer Leith Chick said Sika deer from the Central North Island, in particular, posed a threat of infecting others if they were released in TB free areas.