Objective To examine the clinical features of sporadic patients with H7N9 avian influenzain Taizhou city of Zhejiang province and to characterize its viral genes.Methods Fifteen patients with H7N9 influenza infection confirmed by Zhejiang Provincial Centre for Disease Control and Prevention during January 201 4 and January 201 5 were included in the study.The basic diseases,poultry exposure history,clinical manifestation,laboratory examination,imaging features,treatment and outcome and viral gene sequencing were analyzed retrospectively.Results The first clinical symptoms were fever and cough in all patients,acuterespiratory distress syndrome(ARDS)occurred in 1 3 patients,the average time from onset to antiviral therapy was (7 ±2)d.Among 1 5 patients,9 survived and 6 died,including 2 died of multiple organ failure (MOF).The phylogenetic tree showed that there was highly homologous in hemagglutinin (HA)and neuraminidase(NA)genes between human H7N9 virus strains and poultry reference strains.The result of genetic sequencing indicated that human H7N9 virus strains had mutations at 226 (Q226L)sites in HA protein.Conclusions ARDS is likely to occur in patients with H7N9 viral infection,and early antiviral treatment usually leads to a good prognosis.With the occurrence of adaptive mutation in avian influenza virus H7N9,spread from poultry to the human beings may take place.

Objective To understand the ethics conflict situations between the pre-hospital patients and ambulance staff's determinations. Methods Taking a survey among the pre-hospital emergency physicians(80 people)and nurses(248 people)by Questionnaire of ethics conflicts during pre-hospital emergeney service,to investigate the ethics conflict situations between the pre-hospital patients and ambulance staff's determinations. Resulls (8.046±6.990)%of the patients who needed treatments refused to be treated completely,and(14.544±10.558)%of them refused partially.(14.451±14.747)% of the patients who needed ambulance transport refused to be delivered.In the patients who refused treatments and transportation.payment problem accounted for(23.52±19.79)%,(22.22±20.84)%of them did not believe they needed.(5.77±4.47)%of them wished to die,(19.44.4±18.65)%of them were hard to be idenfified.Other reasons accounted for(30.08±25.78)%.(20.31.4±16.66)% of the patients refused the ambulance crews' judge for some state.(29.66.4±24.02)%of the patients who got the pre-hospital emergency service were not necessary to call an ambulance.(22.1 l±19.52)%of the patients' demand conflicted with pre-hospital emergency services network management system.Conclusions There exists some conflicts between the pre-hospital patients and ambulance crews' determinations.

Objective To investigate the independent factors influencing the efficacy of pre-hospital CPR effect. Method The data base with 1376 cases was set up with EpiData software by means of questionnaires and the information was provided by the survivals from cardiopulmonary arrest( CA)saved with cardiopulmonary resuscitation(CPR), and the data were analyzed with SPSS 13.0 software to carry out binary logistic regression. Through single factor analysis, the factors with emerged statistical significance were chosen as variances. Results With regard to the restoration of spontaneous circulation(ROSC), the rescue did by the first witness was the protective factor(PF)( OR = 2.21, P = 0.001, 95.0% CI=1.356-3.602); the male was the risk factor(RF) contrasted with the female( OR = 0. 515, P =0. 006, 95.0%0 CI = 0.320 - 0. 26) ; ages between 20 and 29 years old had higher likelihood of ROSC than group ≥81 years old( OR = 3.241, P = 0.026, 95.0%CI = 1.146 -9.138); the length of CA time before CPR was RF(OR = 0.913, P = 0.000, 95.0%CI = 0.887-0.948);ventricular fibrillation(VF) was PF compared with asystole( OR = 5.092, P = 0.000, 95.0%CI=2.927 -8.861); electric shock was PF(OR = 3.384, P = 0.000, 95.0%CI = 2.033 - 5.635); epinephrine dosage 0 - 4 mg had higher likelihood of ROSC than > 5 nag dosage( OR = 3. 255, P = 0. 001, 95.0% CI = 1. 606 -6.597). In respect of probability about victims at the tittle reached hospital alive, ages of 2- 12 and 13 - 19 years old had higher rations than ≥81 years old( OR = 12.818, P = 0.029, 95.0% CI = 1.299 - 126.508)( OR = 10.505, P = 0.036, 95.0% CI = 1.161-95.058); the length of CA time before CPR was RF(OR =0.862, P = 0.000, 95.0%CI = 0.821-0.906); VF was PF compared with asystole(OR = 7.330, P =0.000, 95.0%CI = 3.962 - 13.560). Conclusions ECG change before CPR, rescue by the first witness,electric shock, the length of CA time before CPR, epinephrine dosage, gender and age were independent influencing factors of pre-hospital CPR for the emergency of ROSC. Age, the length of CA time before CPR and ECG before CPR were influencing factors of pre-hospital CPR for patients at the time transferred to hospital alive.

Saccharomyces cerevisiae is one of the most important hosts in metabolic engineering. Advanced gene editing technology has been widely used in the design and construction of S. cerevisiae cell factories. With the rapid development of gene editing technology, early gene editing technologies based on recombinase and homologous recombination have been gradually replaced by new editing systems. In this review, the principle and application of gene editing technology in S. cerevisiae are summarized. Here, we first briefly describe the classical gene editing techniques of S. cerevisiae. Then elaborate the genome editing system of MegNs, ZFNs and TALENs based on endonuclease. The latest research progress is especially introduced and discussed, including the CRISPR/Cas system, multi-copy integration of heterologous metabolic pathways, and genome-scale gene editing. Finally, we envisage the application prospects and development directions of Saccharomyces cerevisiae gene editing technology.
CRISPR-Cas Systems/genetics* ; Endonucleases/genetics* ; Gene Editing ; Saccharomyces cerevisiae/genetics* ; Technology

ObjectiveTo determine the prevalence of hepatitis C virus （HCV） infection and identify the underlying risk factors among drug users in Taizhou City of Zhejiang Province during 2009‒2020. MethodsA consecutive cross-sectional survey was conducted. A total of 400 drug users in correctional settings were randomly selected from April to August. The drug users were interviewed with a questionnaire to collect demographic characteristics， AIDS-related knowledge， detoxification service， drug use， and sexual behavior. Blood samples were then collected for anti-HCV antibody testing. Chi-square test and multivariate conditional logistic regression were used. ResultsA total of 5 042 drug users were included in this study. Seroprevalence of HCV was determined to be 22.7%. From 2009 to 2019， the seroprevalence showed a significant downward trend， from 34.9% to 8.8% （χ²=221.025， P<0.001）. However， in 2020， the seroprevalence was 12.7%. The multivariate logistic regression analysis showed that senior age （≥25 years old）， cohabitation， taking traditional or mixed drugs， injection drug use， and needle sharing were risk factors associated with HCV seroprevalence. ConclusionSince 2009， HCV seroprevalence among drug users in Taizhou City has shown a downward trend， however， it has increased slightly in 2020. It warrants strengthening prevention and treatment measures in response to risk factors related to HCV infection among drug users.