Basic research for biosecurity against the protozaon Perkinsus species

2018 Fiscal Year Final Research Report

• Project/Area Number: 16H04967
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Aquatic bioproduction science
• Research Institution: The University of Tokyo
• Principal Investigator: YOSHINAGA TOMOYOSHI 東京大学, 大学院農学生命科学研究科(農学部), 教授 (20345185)
• Co-Investigator(Kenkyū-buntansha): 伊藤 直樹 東京大学, 大学院農学生命科学研究科(農学部), 准教授 (30502736)
• Research Collaborator: Gary Meyer
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: Perkinsus olseni / 防疫 / アワビ / アサリ / 殺虫

Outline of Final Research Achievements

Molecular, morphological and biochemical comparisons among one strain of the protozoan Perkinsus olseni infecting Australian abalone and several strains of the same species infecting Manila clam in Japan suggest that that of Australian abalone and those of domestic Manila clam have different oigines. Furthermore, the Australian strain showed higer affinity to two abalone species in Japan than the Japanese strain. The results suggest that P. olseni in Australia should be subjected to import risk management.
Parasitecidal effects of chroline treatment and ultraviolet light exposure were evaluated againt trophozoites, prezoosporangia and zoosopres of P. olseni. Based on the evaluation, a method to treat drainage water from storage facilities of animals infected with P. olseni was proposed.

Free Research Field

魚病学

Academic Significance and Societal Importance of the Research Achievements

国内のアサリとオーストラリアのアワビ類に寄生するPerkinsus olseniが、異なる集団に属しており、オーストラリアのアワビ類のP. olseniは輸入防疫の対象とする必要があることを示唆された。また、国際的にも防疫対象となっているP. olseniの全発育段階について、消毒条件を明らかにすることができた。こられの結果は、P. olseniの国際的な防疫のために必要な基本的な知見を与えるものである。