Effect of gamma irradiation on Burkholderia thailandensis (Burkholderia pseudomallei surrogate) survival under combinations of pH and NaCl

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• 作者：Yohan Yoon ; Jae-Hun Kim ; Myung-Woo Byun ; Kyoung-Hee Choi ; Ju-Woon Lee
• 关键词：Bioterrorism ; Irradiation ; Burkholderia thailandensis ; Burkholderia pseudomallei ; NaCl
• 刊名：Radiation Physics and Chemistry
• 出版年：2010
• 出版时间：April 2010
• 年：2010
• 卷：79
• 期：4
• 页码：545-548
• 全文大小：150 K

文摘

This study evaluated the effect of gamma irradiation on Burkholderia thailandensis (Burkholderia pseudomallei surrogate; potential bioterrorism agent) survival under different levels of NaCl and pH. B. thailandensis in Luria Bertani broth supplemented with NaCl (0–3 % ), and pH-adjusted to 4–7 was treated with gamma irradiation (0–0.5 kGy). Surviving cell counts of bacteria were then enumerated on tryptic soy agar. Data for the cell counts were also used to calculate D₁₀ values (the dose required to reduce 1 log CFU/mL of B. thailandensis). Cell counts of B. thailandensis were decreased (P<0.05) as irradiation dose increased, and no differences (P≥0.05) in cell counts of the bacteria were observed among different levels of NaCl and pH. D₁₀ values ranged from 0.04 to 0.07 kGy, regardless of NaCl and pH level. These results indicate that low doses of gamma irradiation should be a useful treatment in decreasing the potential bioterrorism bacteria, which may possibly infect humans through foods.