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False positive immunoreaction in products of conception.
  1. F G Barker,
  2. P Ozua,
  3. S Van Noorden
  1. Department of Histopathology, Royal Postgraduate Medical School, London.


    False positive immunostaining for cytomegalovirus in products of conception was revealed using an avidinbiotinylated peroxidase complex. The cause was shown to be endogenous biotin. The use of a non-avidin-biotin method avoided the problem.

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