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Thread: Antibiotics in milk

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    Antibiotics in milk

    Hello all never posted before but need a bit of help. Milk has failed the antibiotic test for last 3 days and we're at a loss to know why. 2 mastitis cases at moment which we've kept out, have dumped milk off all cows that calved in last 2 weeks and it's still failed. No other cows had any other course of antibiotic recently. The milks passing our delvotest but not tanker stick test so it's only a minimal amount so we haven't tubed the wrong cow or it would of been high. Just wondered if anyone had ever had any similar problems and what it turned to be. Cheers in advance.

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    Re: Antibiotics in milk

    Quote Originally Posted by Montyman View Post
    Hello all never posted before but need a bit of help. Milk has failed the antibiotic test for last 3 days and we're at a loss to know why. 2 mastitis cases at moment which we've kept out, have dumped milk off all cows that calved in last 2 weeks and it's still failed. No other cows had any other course of antibiotic recently. The milks passing our delvotest but not tanker stick test so it's only a minimal amount so we haven't tubed the wrong cow or it would of been high. Just wondered if anyone had ever had any similar problems and what it turned to be. Cheers in advance.
    Would they be getting meal with mould on it? A farmer in this area had a problem a few years ago, no meal fed all summer and when he started feeding in the autumn he had several days of antibiotic failures on snap tests. It was eventually traced to the remnants of meal which had lay in the loft all summer. IIRC delvo claims to be less susceptible to this than some other tests.

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    Senior Member Recycled's Avatar
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    Re: Antibiotics in milk

    any of your new calved cows calf early or aborted , ive seen cows dryed of , then abort and they still got antibiotis in there system after the withdrawal period is by

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    Re: Antibiotics in milk

    Quote Originally Posted by Recycled View Post
    any of your new calved cows calf early or aborted , ive seen cows dryed of , then abort and they still got antibiotis in there system after the withdrawal period is by
    My first thought too.

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    Re: Antibiotics in milk

    [QUOTE=Recycled;216383]any of your new calved cows calf early or aborted , ive seen cows dryed of , then abort and they still got antibiotis in there system after the withdrawal period

    No have checked all dates and they're all to time. Have dumped milk on most recent ones as a precaution but it's still failing. Milk passed on Monday and nothing new has gone into tank since

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    Re: Antibiotics in milk

    We had a similar problem with 'water in the milk' about 10+ years ago.

    We were completely baffled but the 'problem' disappeared just as quickly as it appeared

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    Re: Antibiotics in milk

    We had a problem a few years ago, turned out when drying a cow off dad had tubed the cow next to the one he was supposed to!!! Can't choose ya family!!

  8. #8

    Re: Antibiotics in milk

    Failed an antibiotic test a couple of years ago, lots worrying/searching for the problem, it turned out it wasn't even our sample that caused the problem

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    Re: Antibiotics in milk

    Don't presume the tests are right, contact NMR to get samples to NML and check them.

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    Re: Antibiotics in milk

    have you tested your own milk
    start testing cows

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    Re: Antibiotics in milk

    Thanks for all the replies much appreciated, the milk has continued to pass our delvotest but fail the stick test on the tanker but after further testing by the Dairy they now say it should of passed and their test could of been wrong. So it will be collected in the morning. All very baffling really, still testing different individual cows and getting feed tested as suggested to see if this throws anything up but hopefully it is just down to inconsistent testing!

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    Senior Member Recycled's Avatar
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    Re: Antibiotics in milk

    maybe the tanker driver been using antibiotic cream on his hands

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    Re: Antibiotics in milk

    Quote Originally Posted by J B View Post
    We had a similar problem with 'water in the milk' about 10+ years ago.

    We were completely baffled but the 'problem' disappeared just as quickly as it appeared
    A sample of milk taken directly from a freshly washed and thoroughly dried teat has been known to fail FPD before now.

    Natural variation tends to be overlooked and can vary between 510 and 580 ( Accepted Standard 540)


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    Re: Antibiotics in milk

    I don't dairy so had to Google FDP to see what it was. Found this which suggest the standard was changed in 2003 and accepted level is 509.

    www.
    dairyuk.org/component/docman/doc_download/3940-fr

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    Re: Antibiotics in milk

    Quote Originally Posted by Pine_guy View Post
    I don't dairy so had to Google FDP to see what it was. Found this which suggest the standard was changed in 2003 and accepted level is 509.

    www.
    dairyuk.org/component/docman/doc_download/3940-fr
    This. Mid 520's is about right. They start getting arsey around the 510 mark. We had a problem during the summer before drying off when yields were lower and traced it back to condensation building on the side of the tank when milk wasn't covering the fins.
    To the OP. Is the dairy close by? Is there any chance you can run a bulk sample to their labs to test before it is lifted? Delvo tests are ok but you can throw a false negative result from time to time. (3 days in a row would be pussing it though)

    HH

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    Re: Antibiotics in milk

    Quote Originally Posted by The Happy Herdsman View Post
    (3 days in a row would be pussing it though)
    HH
    Nice pun

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    Re: Antibiotics in milk

    the delvotest is the industry standard, if your milk is passing that then there's nothing wrong with it, get a sample of someone else's milk which you know is clear and get them to test that with the snap test in the tanker as well as yours, if they both fail you'll know the tanker's snap tests are faulty

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