南カリフォルニアで犬を殺すヒラムシが発見される(Dog-killing flatworm discovered in Southern California)

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2024-03-14 カリフォルニア大学リバーサイド校(UCR)

UCリバーサイドの研究者が初めて、カリフォルニアの一部を流れるコロラド川に致命的な犬の寄生虫が存在することを確認した。この寄生虫は犬の肝臓や腸に影響を与え、犬のジストマ症を引き起こす。現地での研究により、2,000以上のカタツムリから寄生虫が同定され、この寄生虫は人間に感染することはないが、水の浄化処理で簡単に除去できることが明らかになった。

<関連情報>

西海岸における犬住血吸虫症: カリフォルニア州コロラド川で発見された2種の自然中間宿主におけるHeterobilharzia americana Canine Schistosomiasis in the West Coast: Heterobilharzia americana in Two Natural Intermediate Hosts Found in the Colorado River, California

Anil Baniya,Connor J. Goldy ,Jiranun Ardpairin ,Perla Achi ,Yu Wei Chang ,Rose C. Adrianza ,Apichat Vitta , and Adler R. Dillman
Pathogens  Published: 13 March 2024
DOI:https://doi.org/10.3390/pathogens13030245

南カリフォルニアで犬を殺すヒラムシが発見される(Dog-killing flatworm discovered in Southern California)

Abstract

The emergence of infectious diseases presents a significant global health, economic, and security risk. Climate change can unexpectedly lead to the spread of pathogens, vectors, or hosts into new areas, contributing to the rise of infectious diseases. Surveillance plays a crucial role in monitoring disease trends and implementing control strategies. In this study, we document the first discovery of Heterobilharzia americana, a parasitic schistosome of mammals and its intermediate hosts Galba cubensis and Galba humilis along the banks of the Colorado River in California. We conducted multiple samplings of snails from various locations in the region with a previous history of canine schistosomiasis. Nucleotide sequencing of the multiple regions of the snails’ and parasites’ DNA revealed the coexistence of G. cubensis and G. humilis, both infected with H. americana. Phylogenetic analyses further validate the presence of H. americana in California, suggesting a wider distribution than previously reported. Our findings have implications for public health, veterinary medicine, and biodiversity conservation, contributing to developing effective control strategies to prevent the spread of this emerging infectious disease.

生物環境工学
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