[Jacob-list] OPP and Johnes Testing

[Neal and Louise Grose]

Sue,

If what your vet is saying is correct, it may be an overstatement. Pasteurization is never 100% unless you like toast for milk. The link between Johnne's and Crohn's is not a real muddle...we in the dairy industry mumble and cover our mouths when we say it...It may be no more than the fact that Avian paratuberculoisis is fairly common and is an opportune benign infection in a weakened intestine. Also, isolated genetic groups are not as isolated as they used to be.

What we do know about both/all these infections is that they are more easily contracted if they are encountered early in the animals life and with a weakened immune system and in greater concentrations.

Neal
  ----- Original Message ----- 
  From: Susan J Martin 
  To: nlgrose at yadtel.net ; jacob-list at jacobsheep.com 
  Sent: Saturday, November 08, 2003 6:24 PM
  Subject: Re: [Jacob-list] OPP and Johnes Testing


  Neal and Tara:

  I have been told by our vets that typical pasteurization does not produce high enough heat to kill the Johne's pathogen.  And, the pathogen can be soil borne for years.  And, here in dairy country we also have a high deer population -- and deer and cows/sheep/goats typically co-mingle as only an 8 foot fence will keep a deer out of a pasture.  AND, if Johne's is implicated in Crohn's disease -- this is a real time bomb.  Crohn's disease, BYW, is appearing in individuals who do not fit the previously understood genetic profile.

  Sue Martin
  Stonecroft Manor
  Lititz, PA

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