Comparison of hepatitis A virus detection methods in strawberries
10.3760/cma.j.cn112866-20221110-00229
- VernacularTitle:草莓中甲型肝炎病毒检测方法的比较
- Author:
Mengqi JIAO
1
;
Wenjiao YIN
;
Jingyuan CAO
;
Shengli BI
Author Information
1. 中国疾病预防控制中心病毒病预防控制所 国家卫生健康委员会医学病毒和病毒病重点实验室，北京 102206
- Keywords:
Strawberry;
Hepatitis A virus;
Pretreatment method;
Fluorescence quantitative real-time polymerase chain reaction
- From:
Chinese Journal of Experimental and Clinical Virology
2023;37(1):83-88
- CountryChina
- Language:Chinese
-
Abstract:
Objective:The two detection method for the detection of hepatitis A virus (HAV) in strawberries were optimized and compared to select the best detection method for the detection of hepatitis A virus in strawberries.Methods:Different concentrations of HAV were inoculated on the surface of known negative frozen strawberry specimens, the concentration of beef extract powder in alkaline elution-PEG concentration method was optimized, the optimal nucleic acid extraction kit was selected, the optimal lysis buffer volume in direct lysis method was optimized, and the recovered viral load was detected by Real-time fluorescence quantitative RT-PCR. SPSS26.0 was used to statistically analyze the data, and the optimized two method were used for the detection of actual specimens.Results:The concentration of beef extract powder by the optimized alkaline elution-PEG concentration method was selected at 3%, and the viral nucleic acid extraction kit was selected as kit B. Six ml of lysis buffer was selected for the optimized direct lysis method. The recovery rates of HAV virus by alkaline elution-PEG concentration and direct lysis were compared with the HAV addition levels, and the HAV virus recovery rates of the two method were 21.50±1.06% and 5.82±0.01%, respectively, and the result showed that the differences were statistically significant. A total of 60 strawberry specimens from four regions were tested at the same time, and the result were all negative.Conclusions:The optimized alkaline elution-PEG concentration method has higher sensitivity and is more suitable for the detection of HAV in strawberry specimens.
