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首页> 外文期刊>Journal of Medical Entomology >Volatiles Emitted From Eight Wound-Isolated Bacteria Differentially Attract Gravid Screwworms (Diptera: Calliphoridae) to Oviposit
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Volatiles Emitted From Eight Wound-Isolated Bacteria Differentially Attract Gravid Screwworms (Diptera: Calliphoridae) to Oviposit

机译：八个伤口分离细菌产生的挥发物有区别地吸引卵生螺旋虫（双翅目：Calliphoridae）排卵

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摘要

Bovine blood inoculated with bacteria isolated from screwworm [Cochliomyia hominivorax (Coquerel) (Diptera: Calliphoridae)]-infested animal wounds was tested as an attractant for oviposition for gravid screwworms. Eight species of gram-negative coliform (Enterobacteriaceae) bacteria mixed with bovine blood singly or all species combined and incubated for various times produced volatiles that attracted gravid flies in a cage bioassay in varying numbers. In 15-min duration tests, volatiles from five species of bacteria (Klebsiella oxytoca, Proteus mirabilis, Proteus vulgaris, Providencia rettgeri, and Providencia stuartii) attracted more females than volatiles of the three species (Enterobacter cloacae, Enterobacter sakazakii, and Serratia liquefaciens). In 1-h duration oviposition tests, volatiles from the substrate using the same five species of bacteria attracted more females to oviposit than the other three species. Volatiles from 24-h incubation period elicited least attraction and oviposition whereas volatiles from the 48- and 72-h incubation period resulted in significantly more attraction and oviposition. Attraction and oviposition decreased significantly when the substrates were incubated for 96 h. Volatiles from substrate with all species of bacteria combined attracted a significantly higher percentage of flies to land and oviposit than those from substrates prepared with single species. It is possible that multiple active chemicals present in volatiles of the all-species substrate may act as synergists resulting in greater response than those observed with volatiles from single-species substrate. Before oviposition flies took a bloodmeal from the oviposition substrate. It is possible that the oviposition is moderated by two different factors in screwworm first, by using a chemical cue to land on a potential oviposition site and second, by using a bloodmeal to stimulate oviposition.
机译：测试了用从螺旋虫[Cochliomyia hominivorax（Coquerel）（Diptera：Calliphoridae）]感染的动物伤口中接种的细菌感染的牛伤口作为引诱性产卵螺旋虫的诱因。八种革兰氏阴性大肠菌（肠杆菌科）细菌单独或与所有牛血混合，并混合培养多次，所产生的挥发物在笼式生物测定法中吸引了苍蝇。在15分钟的持续时间测试中，来自五种细菌（产酸克雷伯菌，变形杆菌，寻常变形杆菌，普罗维登斯氏菌和普罗维登斯氏菌）的挥发物吸引的雌性比这三种细菌（阴沟肠杆菌，阪崎肠杆菌和沙雷氏菌）的挥发物要多。 。在1小时持续性排卵测试中，使用相同5种细菌的底物挥发物比其他3种细菌吸引了更多的雌性排卵。 24小时潜伏期的挥发物引起最少的吸引和产卵，而48小时潜伏期和72小时潜伏期的挥发物则引起更多的吸引和产卵。将底物孵育96小时后，吸引力和产卵量显着降低。与使用单一物种制备的底物相比，结合了所有细菌的底物的挥发物吸引着更多的果蝇着陆和产卵。全物种底物挥发物中存在的多种活性化学物质可能会起增效剂的作用，从而比单物种底物的挥发物产生更大的响应。产卵前，蝇从产卵基质上取血。可能通过两种不同的因素来减轻蠕虫的产卵，首先是通过使用化学提示降落在潜在的产卵部位，其次是通过使用血粉刺激产卵。

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