Enlightening from optimizing post-authorization safety monitoring system of SARS-CoV-2 vaccines in major economies worldwide / 中华预防医学杂志

Ongoing global pandemic of Coronavirus Disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has promoted the unprecedented rapid development and large-scale rolling out of different platform-based COVID-19 vaccines worldwide. How to effectively respond to the expected scale increasing adverse events after vaccination campaign of COVID-19 vaccines is a common problem faced by the world. A lot of countries and regions around the world have arranged in advance at different levels, optimizing the original vaccine safety monitoring system from the perspectives of strengthening the foundation and capabilities, promoting internal and external cooperation, upgrading methods, as well as improving transparency and public communication, which has ensured the good and efficient operation of the system and can provide reference for the construction of relevant fields in China.

Consideration on implementation of co-administration of Seasonal Influenza and COVID-19 vaccines during pandemic in China / 中华预防医学杂志

Influenza is an infectious respiratory disease caused by the influenza viruses. Older people, infants and people with underlying medical conditions could have a higher risk of severe influenza symptoms and complications. The co-infection of Coronavirus Diseases 2019 (COVID-19) with influenza viruses could lead to the complication of prevention, diagnosis, control, treatment, and recovery of COVID-19. Influenza vaccine and COVID-19 vaccine overlapped in target populations, vaccination time, and inoculation units. Although there was insufficient evidence on the immunogenicity and safety of co-administration of influenza vaccine and COVID-19 vaccine, World Health Organization and some countries recommended co-administration of inactivated influenza vaccine and COVID-19 vaccine. This review summarized domestic and international vaccination policies and research progress, and put forward corresponding suggestions in order to provide scientific support for the formulation of vaccination strategy on seasonal influenza vaccine and COVID-19 vaccine.

The time-series analysis of human rabies in China / 中国人兽共患病学报

In order to analyze the temporal distribution characteristics of human rabies in China and explore the incidence forecasting,R3.3.2 software were used to establish the optimal ARIMA model of monthly incidences from 2004 to 2015 in Chi-na.Then the monthly incidences from January to November 2016 were forecasted with the model and the prediction accuracy was evaluated.The annual incidences of human rabies in China were decreasing tendency since 2007,and the monthly incidence reached highly during August to October.The optimal model was ARIMA(2,1,1)(2,0,0)12and the mean absolute error (MASE)was 0.755.The mean relative error was 15.61% when predicting the incidences from January to November 2016.In conclusion,there exists seasonal variation for human rabies in China and ARIMA model can be applied for the short-term fore-casting.

Retrospective analysis of clinical and epidemiological characteristics of hand-foot-and-mouth disease deceased cases in Zhejiang Province / 中华儿科杂志

<p><b>OBJECTIVE</b>To understand the clinical and epidemiological characteristics of hand-foot-and-mouth disease (HFMD) deceased cases.</p><p><b>METHOD</b>Information of demographics, diagnosis and treatment, clinical symptoms and signs, laboratory test results, and epidemiological contact history of 72 HFMD cases who died between May 2008 and September 2011, in Zhejiang Province, were collected and analyzed.</p><p><b>RESULT</b>The average age of the 72 cases was 1.8 years, 45 were males, accounting for 62.5%, 63 (87.5%) of the cases were scattered children. Eighteen counties reported 2 or more deaths, accounting for 46.1% (18/39) among the counties where the deaths were reported. The deaths occurred mainly in April to August, the peak occurred in May and June. Fever (98.4%, 63/64) and rash (95.1%, 58/61) were the most common symptoms, but the rash was not obvious at the first diagnosis. Fever occurred before the rash (79.0%, 49/62), persisted for 4 days in average. Vomiting (71.9%, 46/64), dyspnea (65.6%, 42/64), cyanosis (53.1%, 34/64) and impaired consciousness (51.6%, 33/64) were often seen among the cases; 53.1% (34/64) cases went to see the doctor on the first day, but 82.5%(52/63)cases were misdiagnosed. Time to diagnosis of HFMD was in average 3 days. About 3 to 4 days after the onset, the disease deteriorated sharply, deaths occurred within 1 day after admission in 78.9%(45/57)of the deceased cases; 85.0% (34/40) cases had high white blood cells level, mainly neutrophils increased, the ratio of neutrophil was more than 70% in 55.6% (15/27) of cases. Enterovirus 71 (EV71) infection was found in 93.3% (56/60) cases, the deceased cases often died of pulmonary hemorrhage (42.9%, 21/49) and encephalitis (34.7%, 17/49). The sanitary conditions of the cases' family were poor (65.5%, 36/55), but 73.3% (33/45) cases had no exposure history.</p><p><b>CONCLUSION</b>The HFMD deceased cases were mostly younger aged boys, scattered children, nonlocal-residents, and had poor sanitation. They were often infected with EV71, had high fever but had no typical rash, no clear exposure history, they had increased leukocyte, and were often misdiagnosed. Three or 4 days after onset, the disease deteriorated abruptly, most cases died within 1 week after onset. To decrease the HFMD mortality, early detection of severe cases should be stressed, and relative measures should be taken. The guardian should be aware of having good sanitary situation and healthy habits.</p>

Clinical and epidemiological characteristics of the 6 confirmed human cases with novel influenza A (H7N9) virus infection in Zhejiang / 中华流行病学杂志

<p><b>OBJECTIVE</b>To explore the clinical spectrum, geographic location of human H7N9 avian influenza as well as the characteristics of population at high risk of infection, in order to develop strategies for the prevention and control of the infection. Clinical and epidemiological characteristics on the 6 confirmed human cases in Zhejiang were also analyzed.</p><p><b>METHODS</b>Real-time fluorescent quantitative PCR was used to test the nucleic acid of human H7N9 avian influenza infection, from pharyngeal swabs of the patients and their close contacts. Face to face interview and descriptive method were used to collect related clinical and epidemiological data. Statistical analysis was performed by SPSS 17.0.</p><p><b>RESULTS</b>Six confirmed cases were distributed in Hangzhou and Huzhou cities. The 6 confirmed human cases, including 5 males and 1 female were all confirmed with novel influenza A (H7N9) virus infection, with an average age as 60.83 years (with median as 64.50 years). Cough was the most common initial symptom to be noticed. The clinical manifestations would include fever, dizziness, pain of muscles, coughing, expectoration and short of breath. All the X-ray chest films showed severe pneumonia, and 5 of them having had other chronic diseases. None of the cases admitted to have had a history of exposure to ill/death avians. However, all of the cases had been frequently exposed to the agricultural-byproduct-trading-markets where the positive rate of novel influenza A (H7N9) virus in environmental specimens was up to 43.21%. 32 of the 375 close contacts (8.53%) to the 6 cases appeared abnormal symptoms, but no positive result related to novel influenza A (H7N9) virus nucleic acid was detected from their throat swabs.</p><p><b>CONCLUSION</b>Acute infection on the respiratory system seemed the main clinical manifestation. Elderly men, especially those with chronic diseases were under high risk of human infection with H7N9 avian influenza. The source of infection might be associated with the exposure to poultry. There was still lack of evidence to confirm the route of person to person transmission on H7N9 avian influenza.</p>

Study bone density changes in femoral head with avascular necrosis cystic degeneration using adaptive bone remodeling theory / 医用生物力学

Objective To explore the effect of avascular necrosis cystic degeneration on distribution of bone density. Methods Based on the bone reconstruction model of Weinans and Huiskes, bone density distribution in normal femoral head and in femoral head with avascular necrosis cystic degeneration were calculated by finite element analysis. Results (1) The medial system of lamellae, lateral system of lamellae, intertrochanteric arch and Ward's triangle were generated on the normal proximal femur under simulation. (2) If a primary cystic degeneration occurred, a secondary cystic area would appear below the primary one and its bone density would decrease dramatically with the primary cystic area increased. Cystic degeneration would also change the femoral bearing truss system. Conclusions (1) Wolff’s law on bone remodeling is consistent with modern topology optimization theory. (2) If cystic degeneration appeared due to avascular necrosis of the femoral head, it should be treated timely to prevent the secondary cystic degeneration and collapse of the femoral head.

Study on the integrated monitoring program regarding mouse and main mouse-borne disease in Zhejiang province / 中华流行病学杂志

Objective To study the integrated monitoring program regarding mouse and plague, hemorrhagic fever of renal syndrome(HFRS)and leptospirosis. Methods Integrated monitoring plan was used. A designated office coordinated 5 departments' actions within the Zhejiang Provincial Center for Disease Control and Prevention(CDC). Cage-trapping method was conducted to monitor the density of mice from June to October, respectively. Results Lishui municipal CDC had finished the integrated monitoring program on mouse and mouse-borne disease while the Longyou CDC had finished the field investigation, using the integrated monitoring program.Specimens were sent to provincial CDC. The integrated monitoring program needed more number of personnel and better coordination. Lishui reported 3 leptospirosis cases and 58 HFRS cases in 2009,with the incidence rates as 0.13 and 2.44 per 100 000, respectively. Longyou reported 2 leptospirosis case and 1 HFRS cases in 2009, with the incidence rates as 0.49 and 0.25 per 100 000, respectively.Lishui and Longyou had no plague case. Lishui caught 91 mice in 2009 and the density was 4.17%.Longyou caught 37 mice in 2009, with the density as 1.18 percent. Most mice caught from Lishui were Apodemus agrarius and the next was Mus musculus. In Longyou the Rattus tanezumi ranked the first, followed by Apodemus agrarius. The positive rate of HFRS antigen in Lishui and Longyou were 10.42% and 4.59% respectively. The positive rate of HFRS antibody in Longyou was 3.70%. The culture positive rate of leptospirosis in mouse renal of Lishui and Longyou were 0 and 0.98%respectively. The culture positive rate of leptospirosis in pig renal, duck renal, frog renal and cattle urine of Longyou was 0. The culture positive rate of leptospirosis in duck blood of Longyou was 80%.Conclusion The integrated monitoring program on mouse and mouse-borne disease seemed to be feasible and could promote the integrated surveillance and control program on mouse and mouse-borne diseases in China.

The dissemination of CMV in urine of different group from Guangxi and the relationship between CMV infection and renal disease / 中华实验和临床病毒学杂志

<p><b>OBJECTIVE</b>To detect Human Cytomegalovirus (HCMV) DNA in urine samples from the following groups: pregnant women, sick newborns, hospitalized nephropathy patients, renal transplant recipients and normal population. Preliminarily study the relationship of HCMV infection and renal disease.</p><p><b>METHODS</b>To detect HCMV DNA in morning urine samples by Real-time fluorescence quantitative PCR (FQ-PCR).</p><p><b>RESULTS</b>The positive rates of HCMV DNA in the urine of pregnant women,sick newborns, hospitalized nephropathy patients, renal transplant recipients and normal population are 8.18%, 3.45%, 18.54%, 25.42%, 0.56%.</p><p><b>CONCLUSION</b>The infection rates of HCMV in the urine of pregnant women and sick newborns are very high in Guangxi, it should take serious measures to prevent and control the situation. HCMV probably participate in the injury of kidney, and worsen the disease. It should be one of the causes of renal disease.</p>

A clinicopathological study on 107 cases with gastrointestinal stromal tumors / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To investigate the clinical pathological characteristics and prognosis of gastrointestinal stromal tumors (GISTs).</p><p><b>METHODS</b>One hundred and seven cases, admitted to our hospital from Apr. 1996 to Oct. 2005, were detected by Envision immunohistochemical method and diagnosed as GISTs. Their pathological features, immunohistochemical phenotypes, clinical manifestations and imaging findings were analyzed.</p><p><b>RESULTS</b>Of the 107 GISTs, 107 cases were positive for vimentin (107/107, 100%), 107 cases were positive for CD117 (107/107, 100%), 89 cases were positive for CD34 (89/107, 83.2%), 14 cases were positive for SMA (14/107, 13.1%), 10 cases were positive for desmin (10/107, 9.3%), 22 cases were positive for S-100 (22/87, 20.6%) and 15 cases were positive for NSE (15/107, 14.0%). Among all the GISTs, 73 cases occurred in stomach (68.2%), 28 in small intestine (26.2%), 1 in colon (0.9%) and 5 occurred in other position including mesentery, omentum, and retroperitoneum (4.7%). Fifteen cases were diagnosed as very low grade (14.0%), 25 cases as low grade (23.4%), 33 cases as low malignancy (30.8%) and 34 cases as high malignancy (31.8%). The follow-up was obtained successfully in 89 cases (83.2%). Fourteen cases (13.1%) were confirmed to have recurrences or metastases by review and medical records.</p><p><b>CONCLUSIONS</b>The diagnosis of GIST depends on pathological observation and immunohistochemical study. CD117 is a sensitive marker for the diagnosis of GIST. Surgical resection is the choice for treating GIST. Extended resection, even combined resection of involved organs, is required for malignant GIST.</p>

Clinical application of multi-slice spiral computed tomography in the preoperative staging of gastric carcinoma / 中华胃肠外科杂志

<p><b>OBJECTIVE</b>To evaluate the application of multi- slice spiral computed tomography (MSCT) in the preoperative staging of gastric carcinoma.</p><p><b>METHODS</b>Eighty- nine cases of gastric carcinoma confirmed by endoscopic biopsy (including 49 men and 40 women) were collected between June 2004 and March 2006. MSCT was performed one week before operation and all the images were read by two radiologists. The results were compared with the postoperative pathologic findings.</p><p><b>RESULTS</b>In general, the accuracy of MSCT in determining the T stage of gastric carcinoma was 68.7% based on axial and MPR images. The accuracy of diagnosis for T (1) was 90.0% (9/10), for T(2) was 82.8% (24/29), for T(3) was 69.6% (16/23) and for T(4) was 52.4% (11/21) respectively. The accuracy for MSCT in determining the N stage of gastric carcinoma was 51.8% in general. The accuracy of diagnosis for N(0) was 44.0% (11/25), for N(1) was 72.0% (18/25), for N(2) was 46.4% (13/28) and for N(3) was 40.0% (2/5) respectively. The accuracy of diagnosis for distant metastasis (M(1)) was 90% (9/10).</p><p><b>CONCLUSIONS</b>The accuracy of MSCT in preoperative staging of gastric carcinoma is relatively high. It is easily accepted by the patients as a practical and noninvasive technique of gastric carcinoma staging.</p>

Expressions of NOS and NOS mRNA in the Lung of Rats with Hepatopulmonary Syndrome / 上海第二医科大学学报

Objective To investigate the expressions of nitric oxide synthase (NOS) protein and mRNA in the lung of rats with hepatopulmonary syndrome. Methods Male Sprague-Dawley rats were divided into four groups: sham operation (SO), intrahepatic portal hypertension (IHPH), prehepatic portal hypertension (PHPH) and portasymstimic shunt (PCS). Two weeks after preparation of rat models, the following measurements were performed: arterial blood gas analysis; the concentrations of NO in lungs; in situ hybridization of ecNOS and iNOS mRNA expressions in lung tissue sections with digoxin-labeled ecNOS and iNOS oligonucleotide probes; expressions of ecNOS and iNOS proteins by immunohistochemisty; image and semiquantitative analysis of the expressions of ecNOS, iNOS and their mRNA. Results PaO_ 2 was (73.85?6.51) mmHg in IHPH rats, significantly lower than that in PHPH, PCS and SO rats97.39? 1.33, 95.23?2.22 and (99.05?0.75)mmHg, respectively.The level of lung NO of IHPH was(19.78?5.33)?mol per gram of protein,much higher than that of PHPH, PCS and SO 13.21?3.99,13.89?3.16 and (8.71?1.68)?mol per gram of protein,respectively. In capillary endothelia, positive expressions of ecNOS mRNA and ecNOS protein in IHPH(4.96?0.82,4.11?0.28) were significantly higher than those of PHPH (1.81? 0.39, 1.63?0.18), PCS (1.88?0.53,1.83?0.16)and SO(1.19?0.32,0.98?0.20). Conclusion The expressions of NOS protein and mRNA in the lung of rats with hepatopulmonary syndrome were increased, and the level of lung NO was elevated, which seems to play an important role in the pathogenesis of hepatopulmonary syndrome.