Age specific asexual parasite and gametocyte density in highly endemic malaria in North Sumatra, Indonesia.

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  • ITOKAWA HIDEKI
    North Sumatra Health Promotion Project Department of Medical Zoology, Tokyo Medical and Dental University School of Medicine
  • TAKAI RYOJI
    North Sumatra Health Promotion Project
  • ISHII AKIRA
    North Sumatra Health Promotion Project Department of Parasitology, Okayama University Medical School
  • PANJAITAN W.
    North Sumatra Health Promotion Project Provincial Health Office, North Sumatra

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Other Title
  • インドネシア国北スマトラにおけるマラリア高度浸淫地と年齢別生殖母体血中濃度分布について
  • インドネシア国北スマトラにおけるマラリア高度浸淫地と年齢別生殖母体血中濃度分布について〔英文〕
  • インドネシアコク キタ スマトラ ニ オケル マラリア コウド シンインチ ト

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A mass blood examination was carried out in a coastal village of Perupuk, Asahan Regency, North Sumatra, Indonesia in August 1982. The parasite rate in all ages revealed remarkably high (44%). This was caused by an explosive outbreak of Plasmodium falciparum malaria. The parasite rate in young children (0-9 years) was very high around 60% whereas low less than 20% in adult (over 34 years). This indicates a possibility of outbreak of malaria mostly in children posing public health subject in a village of tropical rural area. Gametocyte carriers of P. falciparum were detected only in the age group less than 25 years. The high parasite density of P. falciparum with both asexual form (more than 1, 000 ring forms/mm3) and gametocyte (more than 100 gametocytes/mm3) was detected only in the age group less than 12 years. Falciparum malaria of high intensity repeatedly occurs mostly in younger age group in Anopheles sundaicus breeding coastal area in north Sumatra. A possible control method aiming at gametocyte carrier of young age group is discussed.

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