Michael Fitzmaurice (Roscommon-Galway, Independent) | Oireachtas source

I am trying to fathom the following. If the animals are tested for TB coming in and the farmer's animals had tested clear down through the years, what would be the cause of TB the following year? There are people who never had TB on their lands but, all of a sudden, even if animals were tested coming in as sucklers, next thing there is a TB outbreak. Perhaps I picked up wrong what Dr. Barrett said in response to the Leas-Chathaoirleach. Did Dr. Barrett mention a fly or something like that going across?