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首页> 外文期刊>Applied Microbiology >Randomized Soil Survey of the Distribution of Burkholderia pseudomallei in Rice Fields in Laos
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Randomized Soil Survey of the Distribution of Burkholderia pseudomallei in Rice Fields in Laos

机译：老挝稻田伯克霍尔德氏菌分布的随机土壤调查

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摘要

Melioidosis is a major cause of morbidity and mortality in Southeast Asia, where the causative organism ( Burkholderia pseudomallei ) is present in the soil. In the Lao People's Democratic Republic (Laos), B. pseudomallei is a significant cause of sepsis around the capital, Vientiane, and has been isolated in soil near the city, adjacent to the Mekong River. We explored whether B. pseudomallei occurs in Lao soil distant from the Mekong River, drawing three axes across northwest, northeast, and southern Laos to create nine sampling areas in six provinces. Within each sampling area, a random rice field site containing a grid of 100 sampling points each 5 m apart was selected. Soil was obtained from a depth of 30 cm and cultured for B. pseudomallei . Four of nine sites (44%) were positive for B. pseudomallei , including all three sites in Saravane Province, southern Laos. The highest isolation frequency was in east Saravane, where 94% of soil samples were B. pseudomallei positive with a geometric mean concentration of 464 CFU/g soil (95% confidence interval, 372 to 579 CFU/g soil; range, 25 to 10,850 CFU/g soil). At one site in northwest Laos (Luangnamtha), only one sample (1%) was positive for B. pseudomallei , at a concentration of 80 CFU/g soil. Therefore, B. pseudomallei occurs in Lao soils beyond the immediate vicinity of the Mekong River, alerting physicians to the likelihood of melioidosis in these areas. Further studies are needed to investigate potential climatic, soil, and biological determinants of this heterogeneity.
机译：拟南芥病是东南亚地区发病率和死亡率的主要原因，那里土壤中存在病原性生物（Burkholderia pseudomallei）。在老挝人民民主共和国（老挝），假疟原虫是造成首都万象附近败血症的重要原因，并已隔离在城市附近的湄公河附近的土壤中。我们探索了假芽孢杆菌是否在远离湄公河的老挝土壤中发生，绘制了横跨老挝西北，东北和南部的三个轴，从而在六个省创建了九个采样区域。在每个采样区域内，选择一个随机的稻田站点，该站点包含100个采样点的网格，每个采样点间隔5 m。从30厘米的深度获得土壤并进行假芽孢杆菌的培养。九个地点中有四个地点（44％）的假疟原虫呈阳性，包括老挝南部萨拉瓦内省的所有三个地点。最高的隔离频率是在东部萨拉瓦内，那里的土壤样品中有94％为假苹果芽孢杆菌阳性，几何平均浓度为464 CFU / g土壤（95％置信区间为372至579 CFU / g土壤;范围为25至10,850 CFU /克土壤）。在老挝西北部（Luangnamtha）的一个地点，只有一个样品（1％）的假苹果芽孢杆菌呈阳性，浓度为80 CFU / g土壤。因此，假芽胞杆菌发生在湄公河紧邻地区以外的老挝土壤中，提醒医生注意这些地区发生类鼻疽的可能性。需要进一步研究来研究这种异质性的潜在气候，土壤和生物决定因素。

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