Culex
Dotaz
Zobrazit nápovědu
Thirteen simple phenols and 8 phenolic acids were tested for toxicity to Culex quinquefasciatus larvae and Musca domestica adults. It was found that while the phenolic acids (except salicylic acid) showed little or no effect on acute toxicity, all the tested simple phenols caused mortality within 24 h after application. Lethal doses for acute toxicity of C. quinquefasciatus were successfully estimated for 12 substances using probit analysis. Thymol, carvacrol, 2-ethylphenol, and salicylaldehyde showed significantly the highest efficiency, for which the lethal doses LD(50) were estimated as 30, 36, 38, and 43 μg/ml, respectively. Lethal doses for acute toxicity of M. domestica adults were successfully estimated for ten substances. Thymol, carvacrol, and 2,6-dimethoxyphenol showed significantly the highest efficiency, for which the lethal doses LD(50) were estimated 53, 69, and 87 μg/fly, respectively.
- MeSH
- Culex účinky léků MeSH
- fenoly farmakologie MeSH
- hydroxybenzoáty farmakologie MeSH
- insekticidy farmakologie MeSH
- larva účinky léků MeSH
- moucha domácí účinky léků MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
V roce 2018 jsme poprvé detekovali neuroinvazivní linii 2 viru West Nile (WNV-2) v komárech Culex modestusv oblasti rybníků Velký Tisý u Lomnice nad Lužnicí v jižních Čechách. Celkem bylo vyšetřeno 5816 komárů Cx. modestus ve 116 směsích. RNA viru West Nile byla detekována v jedné z nich. Zachycený virus je geneticky shodný s kmeny WNV, které v současnosti cirkulují na jižní Moravě, a rovněž s kmeny tohoto viru způsobujícími epidemie ve střední a jižní Evropě. Výsledky naznačují nezbytnost entomologické surveillance patogenních arbo-virů i v lokalitách, kde dosud nebyl WNV prokázán. Jihočeský region se tak po jižní Moravě stává další oblastí s možným rizikem autochtonního výskytu onemocnění západonilskou horečkou.
Here we report the first detection of lineage 2 of West Nile virus (WNV-2) from Culex modestus mosquitoes collected in the fishpond area situated in the Třeboň Basin in South Bohemia during mosquito season 2018. A total of 5816 mosquito females in 116 pools were investigated, and WNV RNA was detected in one pool. The WNV strain shares genetic homology with other WNV strains isolated in South Moravia as well as with viral strains causing outbreaks in southern and central Europe. The results highlight the need for entomological surveillance of WNV even in areas not yet affected (WNV-free areas). The South Bohemian Region, similarly to South Moravia, is becoming a potential risk zone for an autochthonous occurrence of West Nile fever in the Czech Republic.
