Ron Davies : Referring to the apparently sporadic outbreaks during recent weeks in Nelson , Abercynon and Marshfield , do you have any idea as to what the vector was in those cases ? Are you carrying out an investigation to try to identify the cause of those sporadic outbreaks ? If , as you indicated -- and this may well be the case -- the farming community is becoming slightly more relaxed and is dropping its guard , do you have fresh advice to offer people who are outside the infected areas in the light of any information that you have about the possible cause of such sporadic outbreaks ?
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