Pollen Counts for Japanese Cedar and Cypress using a Real-time Pollen Counter at Toyoake City, Aichi for 2001-2004

Ito, Chikashi; Naito, Kensei; Saito, Shoji; Horibe, Tomoko; Ishihara, Masatake; Senoh, Yoshio

doi:10.7248/jjrhi1982.43.4_380

Cited by 3 publications

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“…The accuracy verification of KH-3000 has continued to be carried out nationwide from before the system was operational in 2003 in the Kanto area until present day. The Duraham method has been mainly adopted as a reference method 17–24 . After beginning in 2003 in Kanto, operations subsequently began in 2004 in Kansai, in 2005 in Chubu, in 2006 in Chugoku and Shikoku, in 2007 in Kyushu, and in 2008 in Tohoku and Hokkaido.…”

Section: Introductionmentioning

confidence: 99%

Dispersal of allergenic pollen from Cryptomeria japonica and Chamaecyparis obtusa: characteristic annual fluctuation patterns caused by intermittent phase synchronisations

Ishibashi

Sakai

2019

Sci Rep

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Trees produce pollen during specific times of the year. Pollen can induce pollinosis, a type of allergic rhinitis, in humans. In Japan, allergenic pollen is mainly dispersed from February to May. Using data collected at 120 observation sites managed by the Japanese Ministry of the Environment, we studied the annual patterns of airborne allergenic pollen. The allergenic pollen showed an alternating ON–OFF cycle, but the length of the cycle differed among regions. We used an in-phase/out-of-phase analysis to quantify two characteristic features of the synchronisation. The degrees of phase synchronisation were strong in eastern and weak in western Japan. The pattern of allergenic pollen dispersal throughout Japan is typical intermittent synchronisation. This is the first study to evaluate allergenic pollen’s distribution from a phase synchronisation viewpoint.

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Section: Introductionmentioning

confidence: 99%

Dispersal of allergenic pollen from Cryptomeria japonica and Chamaecyparis obtusa: characteristic annual fluctuation patterns caused by intermittent phase synchronisations

Ishibashi

Sakai

2019

Sci Rep

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A comparative study between the automatic pollen counter KH-3000 and conventional Durham sampler measuring airborne pollen in the Oita University Faculty of Medicine complex

Watanabe

Suzuki

2017

Journal of Japan Society of Immunology & Allergology in Oto

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An automatic pollen counter (KH-3000) was installed at our facilities in 2007. To assess the usefulness of this automatic pollen counter, we compared the scattering cedar and cypress pollen counts obtained using a conventional Durham sampler with those obtained using the automatic pollen counter. We also analyzed the data from the automatic pollen counter. Both devices were set up on the roof of the Oita University Faculty of Medicine complex. The pollen counts measured by KH-3000 and the weather data were obtained from the homepage of the Ministry of the Environment pollen observation system. The daily pollen counts measured by the KH-3000 were the specified accumulation pollen counts of 24 h. We analyzed the data from 2008 through 2015, except for 2011. Missing data were observed about 10% of every hour and from 10 to 20% of every day with the KH-3000. The main cause of missing data was the presence of yellow sand. Pollen counts measured by two devices were significantly correlated every year. The coefficient of correlation was high in February and March and increased with the total pollen count. According to the KH-3000 data, higher temperature and higher wind velocity led to an increase in pollen counts. Decreased pollen counts were observed in rainy weather, at midnight and under conditions of westerly winds. We concluded that the real-time automatic pollen counter was useful for determining the amount of airborne pollen and that this automatic pollen counter may be useful for research on airborne pollen.

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Relationship between the Floating Airborne Japanese Cedar Pollen Count and Inspired Antigen Dose in the Nasal Cavity

et al. 2005

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Determination of the relationship between the ambient airborne pollen count and inspired antigen dose in the human nose is important for to controlling the nasal symptoms of hay fever patients. We compared ambient floating Japanese cedar pollen counts with intranasal cedar pollen antigen doses in this study. Cedar pollen counts were made with two different devices, a Durham-type pollen sampler and a real-time pollen counter (KH-3000, Yamato Manufacturing Co., Ltd., Japan). Twelve healthy male adult volunteers remained seated next to the two devices airborne pollen counting with a nasal air sampler placed on each nostril for one hour during quiet nasal breathing on four randomly chosen days during the cedar pollinating season in 2003. Cry j 1 protein, one of the major allergens in Japanese cedar pollen was measured in the air collected by the nasal sampler by an enzyme-linked immunosorbent assay with anti-Cry j 1 antibody. The intranasal cedar antigen dose was significantly correlated with the floating pollen count determined by both of the airborne pollen counting devices. Thus, it appears that the intranasal cedar antigen dose can be predicted from environmental airborne cedar pollen counts.

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Pollen Counts for Japanese Cedar and Cypress using a Real-time Pollen Counter at Toyoake City, Aichi for 2001-2004

Cited by 3 publications

References 0 publications

Dispersal of allergenic pollen from Cryptomeria japonica and Chamaecyparis obtusa: characteristic annual fluctuation patterns caused by intermittent phase synchronisations

Dispersal of allergenic pollen from Cryptomeria japonica and Chamaecyparis obtusa: characteristic annual fluctuation patterns caused by intermittent phase synchronisations

A comparative study between the automatic pollen counter KH-3000 and conventional Durham sampler measuring airborne pollen in the Oita University Faculty of Medicine complex

Relationship between the Floating Airborne Japanese Cedar Pollen Count and Inspired Antigen Dose in the Nasal Cavity

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