The inactivation effects of microwave on human adenovirus in simulated infectied wastes and the molecular mechanism
10.3760/cma.j.cn112866-20230816-00016
- VernacularTitle:微波对模拟感染性废物中腺病毒的灭活作用及其分子机制
- Author:
Kuo WANG
1
;
Dandi LI
;
Shiyan LIU
;
Zhu YANG
;
Chang LIU
;
Xiaobin YANG
;
Zeming QIN
;
Shujun DING
;
Liuying TANG
;
Li ZHAO
Author Information
1. 山东大学齐鲁医学院公共卫生学院微生物检验学系 山东省"十三五"高等学校感染性疾病防控重点实验室，济南 250012
- Keywords:
Microwave;
Infected waste;
Adenovirus;
Inactivation;
Molecular mechanisms
- From:
Chinese Journal of Experimental and Clinical Virology
2023;37(5):511-517
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the inactivation effects of microwave on human adenovirus 2 (HAdV-2) in simulated infectied wastes, and to explore its molecular mechanism.Methods:25 μl of HAdV-2 virus suspension was dripped with medical disposable gloves, masks and cotton swabs to simulate infectied wastes, and irradiated under different microwave conditions: gloves and masks were irradiated for 30 s, 60 s, and 90 s at 300 W, 500 W, and 700 W, respectively. Cotton swabs irradiate 60 s, 90 s, 120 s at 500 W and 700 W respectively. Temperature changes were recorded, and the inactivation logarithmic values were calculated by the 50% endpoint method to evaluate the microwave inactivation effects, and the proliferation ability of the virus was detected by qPCR. The damage of Penton, Fiber, Hexon and E2 B genes was detected by PCR. The virus was treated with the highest temperature of 76 ℃ during microwave irradiation to study whether there was non-thermal effect during microwave disinfection. Results:After microwave irradiation of infectied waste, the temperature of masks and gloves carriers rises rapidly, with the highest temperature of 76 ℃. The temperature of the cotton swab carriers rose slowly, and the highest temperature is 65 ℃. The inactivation effect of microwave on HAdV-2 was positively correlated with microwave power and irradiation time. In the mask and glove group, microwave power of 700 W irradiated for 60 seconds, and the inactivation logarithm value could reach 3.0, In the cotton swab group, microwave power of 700 W irradiated for 120 seconds, and the inactivation logarithm value was still less than 3.0. This indicated that there were differences in the conditions for microwave inactivation of the virus in different carriers. The qPCR result showed that microwave irradiation could weak the proliferation ability of the virus. Microwave irradiation had no effect on the virus's Penton and Fiber genes, but caused some damage to the Hexon and E2 B genes. The inactivation effect of individual heat treatment on HAdV-2 was weaker than that of microwave irradiation, and there was no damage to the Hexon, Penton, Fiber, and E2 B genes. This indicated the presence of non thermal effects during the microwave inactivation process. Conclusions:Microwave irradiation can inactivate HAdV-2 in simulated infectied wastes through thermal and non-thermal effects, and its damage to viral DNA is one of the mechanisms of virus inactivation.
