Isolation of Burkholderia thailandensis from the environment CDCgov NAU BurkholderiaThailandensis UnitedStates Isolation Environment
By Suchandrima BhowmikFeb 15 2023Reviewed by Aimee Molineux Burkholderia thailandensis is a gram-negative bacterium that poses a threat to public health due to being an opportunistic pathogen, as well as its potential misidentification as the more pathogenic B. pseudomallei, which is its closest phylogenetic relative. The US Federal Select Agents Program has designated B. pseudomallei as a Select Agent and the causative agent of melioidosis.
B. thailandensis infections in humans are quite uncommon, especially in the Western Hemisphere. Three previous clinical cases have been reported from the southern United States, Texas in 2003, Louisiana in 1997, and Arkansas in 2017. Environmental sampling associated with the 2003 Texas case as well as previous sampling for B. pseudomallei complex members were unable to recover B. thailandensis. Occurrences of B. thailandensis have been mostly reported in Australia, Southeast Asia, and Africa.
About the study The study involved the collection of water and soil samples by taking permission from landowners as well as permits for collection from reserved lands. Ten to 100 soil samples were collected from each site at a depth of 30 cm, where two holes were spaced 2.5 meters apart. About 150 ml of water sample was collected from each site with 2.5 meters between each sampling location.
Study findings The results indicated that a total of 2540 environmental samples were collected, out of which 370 were from Texas and 2170 were from Puerto Rico. B. thailandensis DNA was detected in 4 samples from Texas and 6 samples from Puerto Rico. B. thailandensis isolates were detected in 1 sample from Texas and 4 from Puerto Rico. B. thailandensis was also identified from a soil sample collected in Mississippi. Moreover, B.
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