However in 2009 (yes 2009) the same note was posted here in QL

http://www.qatarliving.com/node/527730

And by that time some arguments were shown in the open forum.

Nevertheless it was said (but not confirmed) by the "end of the discussion" that this info could be what you call a Hoax.

Also note there is another link posted referring to HMC page in which Allergy to Black Ants Sting information is presented publicly to the users.

http://www.hmc.org.qa/mejem/sept2001/origsty/os2.htm

Regards!!