描述与真菌病原体Coccidioides immitis相关的土壤微生物群体
Molly Radosevich1, Jennifer Head2,3, Lisa Couper1
1Division of Environmental Health Sciences, University of California, Berkeley, Berkeley, California, 94720.
bioRxiv : the preprint server for biology
|October 10, 2024
概括
动物洞穴创造了微生物息地,增加了土壤微生物的多样性和Coccidioides immitis的存在,这是一种导致型菌的真菌. 这一发现有助于了解病原体的分布,并减少人类暴露的风险.
科学领域:
- 环境微生物学环境微生物学
- 菌类学 菌类学是指菌类学.
- 生态生态学 生态生态学
背景情况:
- 型菌是一种由*Coccidioides*物种引起的真菌病,对人类和哺乳动物构成风险.
- 了解 *Coccidioides * 土壤分布对于减轻暴露至关重要,但由于可变的空间模式,这具有挑战性.
- 动物洞穴涉及到影响土壤中的 *Coccidioides * 存在.
研究的目的:
- 为了研究土壤微生物群落与Coccidioides immitis存在之间的关系.
- 确定土壤来源 (动物洞穴与表面土壤) 对微生物多样性和组成的影响.
- 探索微生物息地如何影响 *Coccidioides* 与其他土壤微生物的共同发生.
主要方法:
- 从卡里索平原国家纪念碑收集了土壤样本,这是一个草原生态系统.
- 内部转录间隔器2 (ITS2) 和16S测序用于表征真菌和细菌群落.
- 统计分析检查了微生物群落,土壤来源和C. immitis存在之间的关联.
主要成果:
- 超过30种真菌物种,包括Onygenales,经常与*Coccidioides*一起出现.
- 阳性样本的微生物多样性明显高于阴性样本的微生物多样性.
- 与表面土壤相比,动物洞穴显示出更高的微生物多样性和C. immitis存在,这解释了社区的显著变化.
结论:
- 有利的微生物息地,如动物洞穴,可以推动土壤微生物多样性和虫存在之间的积极关联.
- 这种关联在资源有限的自然环境中尤为重要.
- 这些发现有助于理解病原体生态,并为公众健康策略提供信息,以防止型菌病.
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