Objective To understand the epidemiologic characteristics and pathogenic virus of cases of viral diarrhea in sentinel hospitals in Liaoning Province.Methods From Jan 2009 to Dec 2011,639 stool samples from sentinel hospitals of Liaoning Province were collected.Rotavirus,human calicivirus,astrovirus and adenovirus were detected by polymerase chain reaction and reverse transcriptase-polymerase chain reaction.The data analysis used chi-squanetest and Fisher's exact test.Results Rotavirus,human calicivirus,astrovirus and adenovirus were detected in 15.96 ％,11.25 ％,1.25％ and 0.31％ of the 639 specimens,respectively.G3 was the most prevailing serotype and P[8] was the most common genotype among 101 group A rotavirus isolates.One strain of group C rotavirus was also detected,which was reported for the first time from Liaoning Province.Phylogenetic analysis showed that this group C rotavirus JX407109 in the present study had the closest genetic relationship with the outbreak strain AB648916 from Japan,with nucleotide sequence consistency of 99 ％.Among the 72 samples of human calicivirus,70 samples were norovirus with G Ⅱ/4 being the predominant genotype,and 2 samples were sapovirus.Astrovirus was detected in 8 samples,most of which were genotype 1.Adenovirus was detected in 2 samples,and both were genotype 41.High incidences of viral diarrhea were noted during the months from December to next year February,and children under 5 years of age had high incidence of rotavirus and astrovirus,while the incidence of calicivirus were similar among different age groups.Conclusions The predominant pathogens of viral diarrhea in Liaoning Province are group A rotavirus and calicivirus.Notably,the group C rotavirus in Liaoning Province shares high genetic consistency with the outbreak strain from Japan.

ABSTRACT:Recently ,prion‐like transmission has been found in various amyloidosis .AApoAII amyloid fibrils in mouse senile amyloidosis have exhibited transmissibility .AApoAII amyloid fibrils ,which were excreted from mice and contained in fe‐ces or milk ,cause mouse senile amyloidosis .However ,transmissibility of AApoAII amyloid fibrils through other pathways has not yet been established .In this study ,we injected AApoAII amyloid fibrils into R1 .P1‐A poa2c mice to induce AApoAII sys‐temic amyloidosis .Two months later ,AApoAII amyloid fibrils ,which deposited in the skeletal muscles of amyloid‐affected mice ,were used to induce AApoAII systemic amyloidosis .Mouse senile amyloidosis which deposited in skeletal muscles could induce secondary transmission of AApoAII amyloidosis .The evidence of transmission through skeletal muscles in non‐prion systemic amyloidosis is found in our study .This pathway of transmission provides new insight into the potential for food‐borne pathogenesis and etiology of systemic amyloidosis .

Objective To investigate the environmental impact of the Japanese Fukushima No.1 nuclear power plant accident on radiation levels in some areas of Liaoning province.Methods The emergent monitoring was performed by detecting atmosphere aerosols,precipitations,drinking water,vegetables,milk and seafood by gamma spectrometry analysis and gross activity measurements.Results The fission radionuclides of 131I,134Cs and 137Cs were detected in atmosphere aerosols 20 d after nuclear accident.The rad ionuclides of 131I,134Cs and 137Cs were found existing in atmosphere for 25,4 and 6 d,respectively,with the highest concentrations of 4.6 × 10 3,2.9 × 10-4 and 4.2 × 10-4 Bq/m3,respectively.The man-made fission radionuclides could not be detected in vegetablcs,drinking water and milk from Shenyang city and seafood from Dandong city.Conclusions The atmosphere might be slightly contaminated in Liaoning province due to the nuclear accident,whereas the vegetables,milk and drinking water not contaminated.

Objective To verify the reliability of dose parameters of radiotherapy under reference and non-reference conditions by using TLD.Methods Dose parameters were verified by using TLDs under reference and non-reference conditions,including the maximum dose in axel of 5 electron beams with energy of 9 MeV and the variations of dose by depth,source-skin distance,exposure field and 45° wedge for 10 photon beams with energy of 6 MV in 5 hospitals.Results The average relative deviation of 6 MV photon beam measured between TLDs and finger ionization chambers were 4.45％,within ± 7％ as required by IAEA.The average relative deviation of 9 MeV electron beam measured between TLDs and plane parallel chambers were 2.45％,within ± 5％ was required by IAEA.Conclusions Measuring dosimetric parameters by using TLDs under reference and non-reference conditions was reliable and feasible.

Objective: To explore the latent categories and general demographic characteristics of short form video addiction among college students, so as to provide empirical reference for prevention and intervention of short form video addiction among college students. Methods: Convenience sampling method was used to select 1 386 college students from a certain university in Anhui Province in June 2023. A questionnaire survey was conducted among college students by using the Short Video Addiction Scale. The latent profile analysis method of "individual center" was used to explore the categories of college students short form video addiction, and multiple Logistic regression was used to explore the influence of demographic variables on the latent classification of short form video addiction. Results: College students with short form video addiction were divided into three latent categories:non addiction group (22.15%, n =307), low addiction group (63.28%, n =877) and high addiction group (14.57%, n =202). The results of multiple Logistic regression analysis showed that gender, major type and family location were related with short form video addiction among college students:male students (low addiction group: OR =0.47; high addiction group: OR =0.41), cultural and historical majors (low addiction group: OR =0.66), and students from cities (high addiction group: OR =0.51) were less likely to be involved in short form video addiction ( P <0.05). Conclusions There is significant group heterogeneity in short form video addiction among college students. Families, schools and society should attach importance and pay attention to the phenomenon of short form video addiction among college students, actively take targeted intervention measures to prevent and reduce the occurrence of short form video addiction symptoms among college students.

objective To understand the baseline data of mortality from malignant tumor from 2006 to 2009 around Hongyanhe Nuclear Power Plant in Wafangdian City,Liaoning Province,so as to provide scientific basis for evaluating the impact of normal operation of nuclear power plant on the health of the residents nearby.Methods Thirty small towns near Hongyanhe Nuclear Power Plant were divided into 5 investigated areas according to the distances away therefrom(0.,10.,20-,30-,and 40-km).The data about from malignant tumor were obtained from the Center for Disease Control and Prevention of Wafangdian.The mortality distribution of difierent malignant tumors was analyzed,including the radiosensitive malignant tumors,especially leukemia,breast cancer,and thyroid gland cancer in different area,gender,and age groups.Results The mortality from malignant tumor was 151.97/105,and the standardized mortality rate(SMR)was 97.76/105.The mortality from malignant tumor among the males was 188.28/105(with the SMR of 116.76/105),and that among the females was 113.47/105(with the SMR of 75.89/105).with a sex ratio of 1.71.The first five cancers in the rank of death causes were lung,liver,stomach,colorectal,and esophageal cancers with mortality of 46.19/105,23.51/105,20.30/105,8.06/105 and 5.45/105,respectively.The mortality from mal.ignant tumor in the areas around the nuclear power plant from the near to the distant were 99.85/105, 137.40/105,138.73/105,156.30/105,and 154.16/105,respectively.The mortality from radiosensitive malignant tumors,leukemia,breast cancer,and thyroid gland cancer were 4.57/105,4.06/105,and 0.26/105,respectively.Conclusions Lung cancer and digestive tract malignant tumors are the main causes of death from malignant tumors in Wafangdian area before the nuclear power plant began to operate.There are no significant differences in the mortality distribution of malignant tumors among different areas,genders,and age groups.There are not significant differences in the mortality distribution of leukemia and breast cancer among different areas and age groups.

Objective To explore the prospect of nonlinear autoregressive neural network in fitting and predicting the incidence tendency of hemorrhagic fever with renal syndrome (HFRS),in the mainland of China.Methods Monthly reported case series of HFRS in China from 2004 to 2013 were used to build both ARIMA and NAR neural network models,in order to predict the monthly incidence of HFRS in China in 2014.Fitness and prediction on the effects of these two models were compared.Results For the Fitting dataset,MAE,RMSE and MAPE of the ARIMA model were 148.058,272.077 and 12.678％ respectively,while the MAE,RMSE and MAPE of NAR neural network appeared as 119.436,186.671 and 11.778％ respectively.For the Predicting dataset,MAE,RMSE and MAPE of the ARIMA model appeared as 189.088,221.133 and 21.296％,while the MAE,RMSE and MAPE of the NAR neural network as 119.733,151.329 and 11.431％ respectively.Conclusion The NAR neural network showed better effects in fitting and predicting the incidence tendency of HFRS than using the traditional ARIMA model,in China.NAR neural network seemed to have strong application value in the prevention and control of HFRS.

Objective:To investigate the effect of interleukin-12(IL-12)on liver lesions and oxidative stress pathway in Sjo-gren's syndrome mice,and to clarify the possible mechanism of liver lesions in Sjogren's syndrome.Methods:Saliva flow rate,liver function,liver pathology and IL-12 level were measured in NOD,IL-12 knockout(IL-12KO)NOD and C57BL/6(B6)mice.Different concentrations of IL-12 and JAK2,TYK2 inhibitors were applied to mouse hepatoma cells.The oxidative stress index of mouse serum and cell culture supernatants of each group were determined.Results:Compared with the other two groups of mice,the NOD mice had significantly higher GOT and GPT(P<0.05),and decreased serum GSH-PX,SOD and CAT(P<0.05).CAT,GSH,GSH-PX and SOD were decreased,while MDA was increased in mice treated with different concentrations of IL-12.JAK2/TYK2 inhibitors reversed regulatory effects of IL-12 on SOD,GSH and MDA in hepatoma cells(P<0.05).Conclusion:IL-12 may aggravated liver damage of Sj?gren's syndrome through promoting oxidative stress of hepatocytes.