Pop, and nasal secretions. After much exploration I believe my MAC came from soul contaminated by the free range chickens under my citrus trees in Texas. My husband used a blower to clear out the leaves, stirring up huge dust clouds. Shortly after that I became very I'll. Now the cleaning is done by taking and bagging when the leaves are damp. The gardener wears protective clothing and a good mask, finishes by washing down the patio. We keep the house closed and I stay well away.