Hi Kristina.
I did a bit of research on this topic, and it looks like the incident with the Immigration Service was in 1981. They apparently processed a large group of Haitian illegal immigrants, and found that about 15% of the men had 'gynecomastia', which is male breast enlargement. The governement blamed it on exposure to pesticides, most probably pyrethin, before the men left Haiti. Apparently the whole group were farm workers. The gynecomastia condition had largely gone away six months later. Here's some URL for sites describing the incident:
http://www.cdc.gov/mmwr/preview/mmwrhtml/00000249.htmhttp://www.cfe.cornell.edu/erap/WNV/WNVEducDocs/Garey-Wolff1998.pdfAnd there was a technical article published:
Sattin, R. W., Roisin, A., Kafrissen, M. E., Dugan, J. B., and Farer, L. S. (1984). Epidemic of gynecomastia among illegal Haitian entrants. Public Health Reports 99, 504-510.
Sorry that this is all some pretty technical reading. But I also looked up Pyrethroids (the pesticide at blame), and it looks like a very toxic substance. I don't recommend that anyone attempt to self-medicate themselves with this stuff. The real-stuff estrogens are reasonably easy to get with a prescription, are a lot more effective and lots safer.
Danielle