Field Epidemiological Investigation
Investigation and analysis of selenium and T-2 toxin in internal and external environment in the historical critical diseased areas of Kaschin-Beck disease in Qinghai Province in 2018
Jing Ma, Qiang Zhang, Cuiling La, Hong Jiang, Lilin Cheng, Shenglu Bai, Duolong He, Shengmei Li, Xianya Meng
Published 2019-06-20
Cite as Chin J Endemiol, 2019, 38(6): 463-466. DOI: 10.3760/cma.j.issn.2095-4255.2019.06.007
Abstract
ObjectiveTo understand the current environmental selenium and T-2 toxin levels in the critically ill areas of Kaschin-Beck disease in Qinghai Province.
MethodsIn three historical villages with serious diseases of Kaschin-Beck disease, Xia, Xiemalang and Yaoshidao were selected; at the same time, three villages from non-diseased areas were selected as control villages including Damitan, Gongba and Deang in 2018. Six villages were used as survey sites. Collected hair samples of children aged 6 - 12 years old, to measure the hair selenium content in Xinghai and Guide survey sites [children's selenium content reference value was (0.60 ± 0.03) mg/kg]. Ten samples of self-produced grain were collected from each survey site, selenium content [wheat selenium content reference value was (0.053 ± 0.007) mg/kg] and T-2 toxin content in grain was detected in the six survey sites. Ten soil samples were collected from each survey sites. Soil selenium content was detected in the six survey sites [soil selenium content reference value was (0.24 ± 0.03) mg/kg].
ResultsThe selenium contents of children's hair in the diseased and non-diseased areas of Xinghai County, Guide County were (0.252 ± 0.071), (0.296 ± 0.087); (0.225 ± 0.032), (0.238 ± 0.040) mg/kg, respectively. The selenium contents of wheat in the diseased and non-diseased areas of the three counties were 0.000 19, 0.003 66; 0.000 15, 0.004 16; 0.016 78, 0.016 94 mg/kg. The soil selenium contents in the diseased and non-diseased areas of the three counties were (0.095 ± 0.015), (0.114 ± 0.014); (0.082 ± 0.013), (0.083 ± 0.018); (0.080 ± 0.005), (0.060 ± 0.013) mg/kg. The T-2 toxin contents of wheat in the diseased and non-diseased areas of the three counties were (3.173 ± 0.762), (3.100 ± 0.473); (2.506 ± 0.430), (3.186 ± 0.451); (2.416 ± 0.619), (2.879 ± 0.456) μg/kg.
ConclusionsThe content of hair selenium of children is close to the normal reference value in the area of Kaschin-Beck disease in Qinghai Province. The contents of soil selenium and the main grain selenium of the residents are low in the diseased village. A certain amount of T-2 toxin is detected in the main grain of residential households.
Key words:
Kaschin-Beck disease; Selenium; Hair; Soil; T-2 toxin
Contributor Information
Jing Ma
Department of Endemic Disease, Institute for Endemic Disease Prevention and Control of Qinghai Province, Xining 811602, China
Qiang Zhang
Cuiling La
Hong Jiang
Lilin Cheng
Shenglu Bai
Duolong He
Shengmei Li
Xianya Meng
