Microplastics affect mosquito from aquatic to terrestrial lifestyles and are transferred to mammals through mosquito bites

Microplastics (MPs) transfer from the environment to living organisms is a nonignorable global problem. As a complete metamorphosis insect, the larvae and adult Culex quinquefasciatus mosquito live in aquatic and terrestrial environments, respectively, where they easily access MPs. However, little i...

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Bibliographic Details
Published in:The Science of the total environment 2024-03, Vol.917, p.170547-170547, Article 170547
Main Authors: Li, Jian-hang, Liu, Xiao-hui, Liang, Guo-rui, Gao, He-ting, Guo, Si-han, Zhou, Xin-yu, Xing, Dan, Zhao, Teng, Li, Chun-xiao
Format: Article
Language:English
Subjects:
adults
Animals
Asaia
blood
body weight
Culex
Culex quinquefasciatus
deltamethrin
eclosion
Ecosystem
environment
fluorescence
Gut microbes
Insect Bites and Stings
insecticide application
Insecticides
Insecticides - toxicity
insects
intestinal microorganisms
Larva
larvae
Mammals
Mice
Microplastics
Mosquito
Mosquito Control
Nitriles
Plastics
Polystyrene
pupation
Pyrethrins
Wolbachia
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Summary:Microplastics (MPs) transfer from the environment to living organisms is a nonignorable global problem. As a complete metamorphosis insect, the larvae and adult Culex quinquefasciatus mosquito live in aquatic and terrestrial environments, respectively, where they easily access MPs. However, little is known about mosquitoes' potential role in MPs accumulation throughout ecosystems. Therefore, we conducted a study with different MPs particle sizes (0.1/1/10 μm) and concentrations (0.5/5/50 μg/mL) on Cx. quinquefasciatus to address this issue. Once exposed at the young larval stage, MPs could accompany the mosquitoes their entire life. The fluorescence signals of MPs in the larvae were mainly located in the intestines. Its intensity increased (from 3.72 × 106 AU to 5.45 × 107 AU) as the concentrations of MPs increases. The fluorescence signals of MPs were also detected in the blood and skin tissues of mice bitten by adult mosquitoes with MPs containing in their bodies. Mosquitos exposed to MPs showed longer larval pupation and eclosion time as well as lower adult body weight. In addition, MPs significantly reduced the lethal effect of pyrethroid insecticides (97.77 % vs. 48.88 %, p 
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2024.170547