title: Studies of atmospheric pollen in Tehran, Iran, 1974-75.
abstract: A Durham sampler was used to study atmospheric pollen in Tehran, 1974-75. More than 18 different pollens were identified and counted. Tree pollens were present from the first week of February to the second week of October. Grass pollens were seen from the first week of May to the middle of November. Weed pollens appeared in the middle of May and were present until the last week of December. Examination of 1,000 patient files indicated that the largest number of patients sought medical help during peaks of pollinations.
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D006801:Humans; D007492:Iran; D006109:Poaceae; D011058:Pollen / Q000032:analysis*; D006255:Rhinitis, Allergic, Seasonal / Q000209:etiology; D012621:Seasons; D014197:Trees