Asthma induced by peanuts in manufacture of peanut butter

I saw a patient recently with quite bad asthma who has worked in the manufacture of peanut butter for years. Her job involves tasting the peanut butter but she is also exposed to dust from peanuts. Her specific IgE to peanuts was 2.09 kU/l. I have not been able to find articles on occupational asthma fro peanuts. Does anyone know of publications on the topic? Thanks

Occupational Asthma, Specialist, 12/15/2015, 12/15/2015,