IF you have both control and case running simultaneously and there is no problem with the instrument (like malfunctioning over one slide and not over the other, which is very unlikely) your problem is with your control.
  I always used tonsils coming from surgey and ususally older than 2 yo patients.
  I used Dako IgMo Ab at 1:1000 with pH6 HIER
  Try a new control tissue (fresh sections if at all possible).
  René J.

Cheri Miller  wrote:
  
 



       
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