Abstract
Background. With an increase in Japanese cedar and cypress (JC) pollinosis, the relationship between JC pollen and atopic dermatitis (AD) has been studied. Some reports suggest that JC pollen can be one exacerbating factor for AD, but there has been no report that discusses JC pollen counts relating to AD symptom flare although actual airborne JC pollen counts can widely fluctuate throughout the pollen season. Objective. The relationship between symptom flare of AD and airborne JC pollen counts was examined. Methods. We monitored JC pollen counts in real time and divided the counts into low and high level. We then analyzed self-scored “itch intensity” recorded by 14 AD patients through a self-scoring diary. Results. Among the 14 patients, 7 had significantly higher itch intensity while the pollen counts were high. Conclusion. Even during the pollen season, actual airborne pollen counts can widely fluctuate. Our study suggested that symptom flare of AD could be influenced by the actual pollen counts.
Highlights
Japanese cedar and cypress (JC) pollinosis is a common disease in Japan
Some reports suggest that JC pollen can be one exacerbating factor for atopic dermatitis (AD), but there has been no report that discusses JC pollen counts relating to AD symptom flare actual airborne JC pollen counts can widely fluctuate throughout the pollen season
Previous studies have concluded that pollen can effect atopic dermatitis (AD), reporting many AD patients showing symptom flare from February to May [8, 9], during which time the airborne JC pollen level is high in Japan
Summary
Japanese cedar and cypress (JC) pollinosis is a common disease in Japan. It is increasing dramatically [1, 2], and the sensitization rate among children has been increasing [3, 4]. Previous studies have concluded that pollen can effect atopic dermatitis (AD), reporting many AD patients showing symptom flare from February to May [8, 9], during which time the airborne JC pollen level is high in Japan. We monitored JC pollen counts in real time and examined the relationship between AD symptom flare and airborne JC pollen counts through an individual self-scoring diary. With an increase in Japanese cedar and cypress (JC) pollinosis, the relationship between JC pollen and atopic dermatitis (AD) has been studied. Some reports suggest that JC pollen can be one exacerbating factor for AD, but there has been no report that discusses JC pollen counts relating to AD symptom flare actual airborne JC pollen counts can widely fluctuate throughout the pollen season. Our study suggested that symptom flare of AD could be influenced by the actual pollen counts
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