From the April 19th Winnipeg Free Press, a news article about the health risks faced by migrant farm workers in Canada.
UPDATE: You can find more information about the report in this news article at ScienceDaily; the UFCW has also issued a press release on these reports.
From the WFP/Canadian Press article:
Many migrant farm workers who come to Canada every year are not given proper safety training, live in hot and cramped quarters, have no access to clean water and see their health suffer as a result, say two new research papers.
Researchers found that many workers from Mexico, Jamaica, the Philippines and other countries develop ailments linked to the gruelling work they do on Canadian farms, largely in British Columbia and Ontario.