I used to think that it is because of the shorter developmental time for
the African(ized) bees.  Supposedly, mites need certain time to develop on the
 host and mortality increases if host emerges earlier.  The Asian workers does
do that -- kicking the mites off, bascally, as reported by YS. Peng.     Huang
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>Date:         Tue, 10 Nov 1992 23:56:35 PST
>Reply-To:     Discussion of Bee Biology <[log in to unmask]>
>Sender:       Discussion of Bee Biology <[log in to unmask]>
>From:         "(Paul C. Cheng)" <[log in to unmask]>
>Subject:      Africanized bees and varroa
>X-To:         [log in to unmask]
>To:           GENE ROBINSON <[log in to unmask]>,
>              ZHIYONG HUANG <[log in to unmask]>
>
>Hi Bee Netters!
>
>Varroa infestation of African or Africanized bee colonies is lower than that
>of European colonies.  One suggestion is that African bees, when irritated
>by the mites, start dancing and shaking violently.  This either causes
>the mite to leave the bee's body, or other bees "groom" it off.
>
>My question is: does a video exist which shows this behavior?  If so, where
>may I obtain it?
>
>Thanks,
>Paul Cheng