A Study on Pollinosis : Part IV.Japanese Pine Pollinosis

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  • Fujisaki Yoko
    Department of Pediatrics, School of Medicine, Niigata University
  • Shimase Hatsumi
    Department of Pediatrics, School of Medicine, Niigata University
  • Ikarashi Takao
    Department of Pediatrics, School of Medicine, Niigata University
  • Yamada Yasuko
    Department of Pediatrics, School of Medicine, Niigata University
  • Kobayashi Osamu
    Department of Pediatrics, School of Medicine, Niigata University
  • Sato Nao
    Department of Pediatrics, Niigata Teishin Hospital

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Other Title
  • 花粉症の研究 : IV.マツ属花粉症
  • 花粉症の研究-4-マツ属花粉症
  • カフンショウ ノ ケンキュウ 4 マツゾク カフンショウ

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Abstract

Two cases of pine pollinosis were reported from Niigata City. The patients had been living for twenty years in Niigata City, where pine pollen is common. Two patients presented seasonal ophthalmic and nasal symptoms every year from April to June (occasionally in July), which corresponds to the season of pine pollination in Niigata. Although case 1 showed a positive reaction to grass pollen and case 2 also to wormwood pollen, they were speculated on as pine pollinosis. Clinical and laboratory findings suggested that case 1 was responsive to black pine (Pinus Thunbergii) and case 2 to red pine (Pinus densiflora). Intracutaneous test and P-K reaction of case 1 showed late cutaneous responses. The thesholds of positive reaction in dilution test of case 2 was 10^<-5>, and P-K reaction was positive. Nasal provocation tests were positive, but conjunctival tests were negative. Hyposensitization therapy with causative pollen was markedly effective in both cases. Atomospheric pollen survey in Niigata City revealed that the pollinating period of pine trees was from April to June (or July), the beginning of May being the peak. By the way, the positive rates of skin test to pollen solution of black and red pines in cases of childhood bronchial asthma were 1.6% and 1.7%, respectively. Cross antigenicity between black pine and red pine was not confirmed. These results suggest that pine pollen should be investigated as one of the causes of pollinosisi in Japan, though its antigenicity is not so strong.

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