In a message dated 11/07/02 05:01:54 GMT Daylight Time,
[log in to unmask] writes:

<< a)  Fear results in increased respiration, perspiration, etc. >>

I don't think perspiration of itself is a trigger. On hot days sweat has
dropped from my brow onto the top bars of a hive without provoking any
noticeable reaction.  The sweat may be a way of distributing human pheromones
(panic is very infectious) that the bees may also react to.

Chris