A farmer was cleaning out the grain silo in the early fall, getting it prepared for fresh grain. There was an area to which she paid special attention because it had some mold, and it is important to disinfect it prior to addition of the new grain. This happened last year as well. During the initial stages of the cleanup, the air was full of the mold's smell and actually became cloudy in an area around her. Twelve hours later, she began to have respiratory symptoms that resulted from a hypersensitivity reaction. Upon testing her sera in an Ouchterlony reaction, she had an obvious precipitin reaction. The reaction seen in her lungs is similar to the reaction seen on the Ouchterlony. She has a

Question

Quizplus · Accepted Answer

The farmer's symptoms and the precipitin reaction indicate a type III hypersensitivity reaction, which involves immune complex formation, similar to the Ouchterlony test.

A Farmer Was Cleaning Out the Grain Silo in the Early