The likely cause is botulism. While the media have made a big issue about the family eating "wild boar", it is likely to be the food storage method that is at the heart of this case. This is something the media have made only scant mention of, but which is a common factor in botulism cases. Currently samples are being tested in Queensland but it may be up to 2 weeks while they are cultured.

There is no suggestion that it is 1080.