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首页> 外文期刊>The Royal Society Proceedings B: Biological Sciences >Parasitized female mice display reduced aversive responses to the odours of infected males.
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Parasitized female mice display reduced aversive responses to the odours of infected males.

机译：寄生的雌性小鼠对受感染雄性气味的厌恶反应降低。

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It was shown that parasites influence both the responses of uninfected and infected female mice to infected males. In females, a consequence of exposure to the olfactory cues associated with an infected male was a reduction of the reactivity to a thermal surface (i.e. pain inhibition or analgesia). Uninfected oestrous and non-oestrous females showed marked analgesic responses after exposure to the odours of males infected with either Heligmosomoides polygyrus or Eimeria vermiformis. Uninfected oestrous females distinguished between infected and physically stressed males, displaying a greater analgesic response to the odours of infected males. These responses and their anxiety-associated behavioural correlates elicited either a reduced interest in,or avoidance of, parasitized males by females. Oestrous females infected with H. polygyrus displayed a reduced analgesic response to the odours of infected males and differentially responded to the odours of males infected with either the same (H. polygyrus) or a different parasite (E. vermiformis). An exposure time of 1 minute elicited minimal responses to the odours of males infected with the same parasite (H. polygyrus) and an attenuated, though significant, non-opioid peptide-mediated analgesic response to males infected with E. vermiformis. Responses to the odours of a stressed male were unaffected by parasitic infection. The reduced analgesic responses of parasitized females to the odours of infected males may involve either enhanced odour familiarity and responses to group odour templates and/or neuromodulatory shifts resulting in reduced anxiety and potentially greater interest in the infected males.
机译：结果表明，寄生虫影响未感染和感染的雌性小鼠对被感染的雄性的反应。在女性中，暴露于与被感染的男性相关的嗅觉提示的结果是对热表面的反应性降低（即疼痛抑制或镇痛）。未感染的雌性和非雌性雌性动物在暴露于多螺旋藻或艾美球虫感染的雄性气味后显示出明显的镇痛反应。未感染的雌雄同体的雌性区分受感染和承受身体压力大的雄性，对被感染的雄性的气味表现出更大的镇痛反应。这些反应及其与焦虑相关的行为相关性引起女性对男性寄生虫的兴趣减少或避免。感染了polygyrus的发情雌性动物对被感染的男性气味的镇痛反应有所降低，并且对感染了相同的（poly H. gygyrus）或不同的寄生虫（E. vermiformis）的男性的气味有不同的反应。 1分钟的暴露时间引起对相同寄生虫（H. polygyrus）感染的雄性的气味的最小反应，尽管减弱，但对非阿片类肽介导的对Ver.formmiformis雄性的镇痛反应减弱。对压力大的男性的气味的反应不受寄生虫感染的影响。寄生的雌性对被感染的雄性气味的止痛反应降低，可能涉及增强对气味的熟悉度以及对组气味模板和/或神经调节移位的反应，从而导致焦虑感降低，并可能对被感染的雄性产生更大的兴趣。

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