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首页> 外文期刊>Southeastern naturalist >Distribution of Mycoplasma agassizi in a Gopher Tortoise population in south Florida
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Distribution of Mycoplasma agassizi in a Gopher Tortoise population in south Florida

机译：佛罗里达州南部地鼠龟种群中的支原体支原体分布

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Gopherus polyphemus (Gopher Tortoise) is a threatened species in Florida and is heralded as a keystone species throughout its range in the southeastern United States. However, this species has faced drastic population declines due mainly to habitat loss, and now disease is threatening the species. Upper respiratory tract disease (URTD) is a highly contagious disease first observed in Gopher Tortoise populations in Florida as early as 1989. URTD may be caused by multiple pathogens, such as Mycoplasma agassizii, which has been documented in Gopher Tortoise populations (Berish et al 2000). The long-term effects of URTD are unknown, as are the effects of the disease on the demographics of the species. In this study, 40 plasma samples were collected from a Gopher Tortoise population to determine the exposure of Mycoplasma agassizii among different age classes and genders. There was not a significant difference in number infected when comparing adult males and adult females. The results suggest adults are exposed to the pathogen at a greater rate than subadults, and exposure may be dependent on age. All subadults tested in this population tested seronegative, indicating they had no previous exposure to Mycoplasma agassizii. Knowledge of the effects of this pathogen is necessary for wildlife management agencies to assess the options available for managing Gopher Tortoise populations. The results of this study suggest a zero known mortality rate due to the pathogen over a 4-year period; however, additional pathological research is required to determine if Mycoplasma agassizii is causing URTD in this population. These results may have implications for the "take" policy in Florida: if Mycoplasma agassizii is not causing URTD in this population, and if the pathogen is not leading to a high mortality rate, then "take" permits based solely on seropositive enzyme-linked immunosorbent assay (ELISA) results may not be justified.
机译：Gopherus polyphemus（Gopher Tortoise）是佛罗里达州的一个受威胁物种，在美国东南部被誉为基石物种。然而，由于栖息地的丧失，该物种的种群数量急剧减少，现在疾病正威胁着该物种。上呼吸道疾病（URTD）是一种高度传染性疾病，最早于1989年在佛罗里达州的Gopher Tortoise种群中首次发现。URTD可能由多种病原体引起，例如无节霉菌（Mycoplasma agassizii），这在Gopher Tortoise种群中已有记载（Berish等2000）。 URTD的长期影响是未知的，该疾病对物种人口统计学的影响也是未知的。在这项研究中，从地鼠乌龟种群中收集了40个血浆样品，以确定不同年龄段和性别的加纳支原体的暴露情况。比较成年男性和成年女性时，感染人数没有显着差异。结果表明，成年人暴露于病原体的比率要高于亚成年人，而且暴露程度可能取决于年龄。在该人群中测试的所有亚成人都检测出血清阴性，表明他们以前没有接触过阿米支原体。了解这种病原体的作用对于野生动植物管理机构评估用于管理地鼠龟种群的可用选择是必要的。这项研究的结果表明，在4年的时间内，病原体导致的已知死亡率为零。但是，需要更多的病理学研究来确定无性支原体是否在该人群中引起URTD。这些结果可能会对佛罗里达州的“服用”政策产生影响：如果无加油支原体未在该人群中引起URTD，并且如果病原体未导致高死亡率，则仅基于血清阳性酶联反应的“服用”许可免疫吸附测定（ELISA）结果可能不合理。

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