Emerging infectious diseases threaten the survival of wildlife populations and species around the world. In particular, amphibians are experiencing population declines and species extinctions primarily in response to two pathogens, the fungus Batrachochytrium dendrobatidis (Bd) and the iridovirus Ranavirus (Rv). Here, we use field surveys and quantitative (q)PCR to compare infection intensity and prevalence of Bd and Rv across species and seasons on Jekyll Island, a barrier island off the coast of Georgia, USA. We collected oral and skin swabs for 1 year from four anuran species and three families, including two native hylids (Hyla cinerea and Hyla squirella), a native ranid (Rana sphenocephala), and the invasive rain frog Eleutherodactylus planirostris. Bd infection dynamics did not vary significantly over sampling months, but Rv prevalence and intensity were significantly higher in fall 2014 compared to spring 2015. Additionally, Rv prevalence and intensity were significantly higher in E. planirostris than in the other three species. Our study highlights the potential role of invasive amphibians as drivers of disease dynamics and demonstrates the importance of pathogen surveillance across multiple time periods and species to accurately capture the infectious disease landscape.

中文翻译：

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与本地物种相比，侵袭性青蛙的病原动力学。

新兴传染病威胁着世界各地野生动植物种群和物种的生存。特别地，两栖动物正经历种群减少和物种灭绝，主要是对两种病原体，即真菌Batrachochytrium dendrobatidis（Bd）和虹膜病毒Ranavirus（Rv）作出反应。在这里，我们使用现场调查和定量（q）PCR来比较Jekyll岛（美国乔治亚州沿海的一个隔离岛）上跨物种和不同季节Bd和Rv的感染强度和患病率。我们收集了四个物种和三个家族的口腔拭子和皮肤拭子，为期1年，其中包括两个原生的Hylids（Hyla cinerea和Hyla squirella），天然a头（Rana sphenocephala）和侵入性雨蛙Eleutherodactylus planirostris。BD感染动力学没有变化显著过采样个月，但器Rv患病率和强度是在2014年秋季显著更高相比弹簧2015另外，器Rv患病率和强度均在显著更高E. planirostris比其他三个物种。我们的研究强调了侵入性两栖动物作为疾病动力学驱动因素的潜在作用，并证明了跨多个时间段和物种进行病原体监测对于准确捕获传染病景观的重要性。