作为一个模型系统,Tenebrio molitor可以研究Staphylococcus spp的毒性和水平基因转移
Ana Luisa Andrade-Oliveira1, Geovana Lacerda-Rodrigues1, Monalessa Fábia Pereira2
1Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
Microbial pathogenesis
|August 11, 2023
概括
虫幼虫提供了一个具有成本效益的无脊椎动物模型,用于研究葡萄球菌毒性和抗菌素耐药性基因转移. 这项研究确立了Tenebrio molitor作为感染和等离子体转移研究的可靠工具.
科学领域:
- 微生物学 微生物学
- 无脊椎动物的病理学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 脊椎动物模型是感染研究的传统.
- 无脊椎动物为研究细菌和真菌病原体提供了一个可行的替代方案.
- 虫幼虫呈现了一个潜在的模型系统.
研究的目的:
- 为了建立Tenebrio molitor幼虫作为一个体内模型来评估Staphylococcus毒性.
- 评估粉幼虫的适合性,研究水平基因转移,特别是塑体转移在Staphylococcus.
- 确定用于实验用途的T. molitor养殖的最佳条件.
主要方法:
- 优化了T. molitor的养殖条件.
- 幼虫被感染了各种Staphylococcus物种,以确定剂量依赖的杀死曲线.
- 在感染后测量了血淋巴中的血细胞度.
- 在幼虫中研究了Staphylococcus aureus菌株之间的等离子体转移 (结合),使用了抗 gentamicin 基因.
主要成果:
- 葡萄球菌物种表现出T. molitor幼虫的剂量依赖性杀死.
- 尼泊尔葡萄球菌 (Staphylococcus nepalensis) 是最有毒的,而金黄色葡萄球菌 (Staphylococcus aureus) 是最没有毒性的.
- 血细胞度的增加与感染的毒性成比例.
- 从捐赠者转移到接受者黄金葡萄球菌菌株的等离子体在幼虫中成功观察到,每种捐赠细胞的频率为1.6 × 10^-5.
结论:
- 虫幼虫作为一个可靠和具有成本效益的体内模型来评估Staphylococcus的毒性.
- 虫幼虫为研究Staphylococcus aureus菌株之间的等离子体转移提供了有效的环境,包括携带抗菌素耐药基因的菌株.
- 这项研究验证了粉虫的使用,用于研究细菌病原和抗生素耐药性的传播.
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