宿主の移動が媒介性疾患の流行に与える影響

Daozhou Gao¹, Yuan Lou²

¹Department of Mathematics and Statistics, Cleveland State University, Cleveland, OH, 44115, USA. d.gao51@csuohio.edu.

Journal of mathematical biology

|September 5, 2025

まとめ

ホストの移住はベクトル媒介の病気の拡散に大きく影響する. 宿主と媒介者の不均等な分布は,疾患の持続性と流行に影響し,宿主での流行率が低いが,媒介者の流行率が高いことが観察された.

科学分野:

流行病学
数学生物学
エコロジー

背景:

人類の移動は病原菌による病気の世界的な拡散の重要な要因です
現存する空間モデルでは,主に病気の動態に焦点を当てており,移住の影響はあまり重視されていません.

研究の目的:

マルチパッチのロス・マクドナルドモデルを用いて,宿主移動が局所的および世界的な疾患の流行に与える影響を調査する.
宿主分散が異なる空間構成における病気の動態にどのように影響するかを分析する.

主な方法:

ホストの移動を含む多パッチのロス-マクドナルドモデルの開発と分析.
ゼロと無限分散率での世界的な病気の流行の公式の導出.
分散効果を評価するための2つのパッチシナリオのモデルパラメータ空間の分類

主要な成果:

局所的な疾患の流行は,弱度の秩序維持特性を有する,切り離されたパッチの最小および最大流行によって制限されます.
極端な分散率での世界的な流行の公式が導き出され,比較が行われました.
数値シミュレーションにより,宿主移動に反応する病気の持続性,宿主発生率,ベクトル発生率の矛盾が明らかになった.

結論:

ホストの移住パターンは,ベクトル媒介の病気の空間的分布と全体的な負担に重大な影響を及ぼします.
宿主と媒介者の分布における環境の異質性は,複雑な疫学的結果につながり,疾患の持続性と流行に異なる影響を及ぼします.
この研究は,効果的な疾病管理戦略のための流行病学的モデルにおける宿主移動を考慮する重要性を強調しています.

キーワード:

病気の持続性病気の流行分散率ホストの複製番号人間の移動モノトニシティ

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