> >When sulfa and OTC were both in use, we never saw resistance, but when OTC
> had to go it alone, we did.  Now, with Tylan as an alternate we are seeing
> less AFB problems again.
>

Allen, with antibiotics, resistance is simply a matter of time.  The more in
rotation, sometimes that time can be extended.  With constant use, the time
is generally shortened.

I'm seeing less AFB, but have not used Tylan to any extent.

Randy Oliver

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