ObjectiveThe contamination of foodborne pathogens in ready-to-eat fruits and vegetables in Shanghai was analyzed to provide a scientific basis for food safety， risk assessment and related supervision. MethodsFrom June to September 2021， a total of 143 batches of12 kinds of ready-to-eat fruits and vegetables such as lettuce， chicory， and cherry tomatoes were collected from farmers’ markets， supermarkets， and e-commerce platforms. The total number of bacterial colonies， Salmonella， Listeria monocytogenes， Staphylococcus aureus， Cronobacter spp. and Shiga toxin-producing Escherichia coli in the samples were tested according to National Food Contamination and Harmfulness Risk Monitoring Manual. ResultsAmong the 143 batches， foodborne pathogens were detected in 68 batches， with a total detection rate of 47.55% （68/143）. A total of 79 strains of foodborne pathogens were detected. The detection rate of Staphylococcus aureus was the highest （32.87%， 47/143）， followed by Cronobacter spp. （20.98%， 30/143）， Salmonella （0.70%， 1/143）， Listeria monocytogenes （0.70%， 1/143）， Shiga toxin-producing Escherichia coli （0.00%）. Furthermore， the detection rate was higher in different ready-to-eat fruits and vegetables： chicory （17.33%）， cucumber （17.14%）， cherry tomatoes （16.00%）， and honeydew melon （15.38%）， respectively. Meanwhile， the contamination rate of pathogens in ready-to-eat fruits and vegetables from farmers’ markets， supermarkets， and e-commerce platforms was relatively high. ConclusionReady-to-eat fruits and vegetables in Shanghai are contaminated by foodborne pathogens. The prevention and control of the contamination of post-harvest fruits and vegetables should be strengthened to reduce the risk of foodborne disease outbreaks.

Recently, the situation of the preventing and controlling of the novel coronavirus infection has changed. After patients with mental disorders are infected with the new coronavirus (hereinafter referred to as the new coronavirus), they will face the following problems: whether the drugs related to the new coronavirus infection can be used at the same time as the psychiatric drugs, and whether there will be pharmacokinetic or pharmacodynamic interactions between the medicines How to avoid the safety risks brought by drug interactions? Focusing on the above issues, this article puts forward some suggestions based on the summary of existing evidence, hoping to help front-line doctors.

Recently, the situation of the preventing and controlling of the novel coronavirus infection has changed. After patients with mental disorders are infected with the new coronavirus (hereinafter referred to as the new coronavirus), they will face the following problems: whether the drugs related to the new coronavirus infection can be used at the same time as the psychiatric drugs, and whether there will be pharmacokinetic or pharmacodynamic interactions between the medicines How to avoid the safety risks brought by drug interactions? Focusing on the above issues, this article puts forward some suggestions based on the summary of existing evidence, hoping to help front-line doctors.

Quorum sensing (QS) plays a major role in the outbreak mechanism of foodborne diseases caused by food poisoning and food spoilage. QS affects the formation of cell membrane and pathogenicity ofpathogenic bacteria. Through the in-depth understanding of QS molecules of food-borne pathogens, we describe here the types of signal molecules produced by Gram-negative and Gram-positive bacteria, and the differences in QS molecules. Meanwhile, we introduce the detection of QS molecules by different technologies. According to the influence of QS on food, we propose also future research needs for the control of foodborne pathogenic bacteria.
Gram-Negative Bacteria ; Gram-Positive Bacteria ; Quorum Sensing

Objective To explore the attempted suicide risk factors of socio-demographic and clinical charac-teristics in major depressive disorder patients with atypical features (e.g. increased appetite, weight gain and greater time spent sleeping). Methods This was a secondary analysis of the data from the Diagnostic Assessment Service for People with Bipolar Disorders in China (DASP), which was initiated by the Chinese Society of Psychiatry (CSP) and carried out in 13 major mental health centers in China. Totally 179 patients were diagnosed as atypical major depres-sive disorder patients in all 1172 major depressive disorder patients using Diagnostic and Statistical Manual of Mental Disorder, Fourth Edition (DSM-Ⅳ) by psychiatrists. Suicide attempters and nonattempters were grouped base on the interview results of suicidality module of the Mini International Neuro-psychiatric Interview (MINI). Multiple logistic regression were used to assess association between independent variables and attempted suicide in major depressive disorder patients with atypical features. Results The rater of attempted snicide was 23.5% (42/179) of atypical major depressive disorder patients reported prior or current attempted suicide. Compared to nonattempters, attempters had higher levels of suicidal ideation, postpartum depressive episodes, and the use of antipsychotic, mood stabilizers and benzodiazepines (P<0.05). Logistic regression analysis showed that number of admissions (OR=1.73, 95% CI: 1.093~2.740) and depressive episodes with suicidal ideation (OR=3.90, 95%CI: 1.506~10.092) were significantly associat-ed with attempted suicide in atypical unipolar depression patients (P<0.05). Conclusions High number of admissions and high levels of suicidal ideation may be considered as potential risk factors to identify atypical unipolar depression patients at risk for future suicidal behavior.

Objective To investigate the effects of risperidone and its active metabolite, paliperidone (9-hydroxyrisperidone), on hyperactivity and deficient sensorimotor gating induced by MK-801 in rats. Methods Adult male Sprague-Dawley (SD) rats (n=96) were used in this study. The effects of risperidone (0.1 mg/kg) and paliperidone (0.05, 0.10 and 0.20 mg/kg) on MK-801-induced (0.40 mg/kg) hyperactivity were examined in 48 rats with with 8 animals per group.The effects of risperidone(0.5 mg/kg)and paliperidone(0.10,0.50,1.00 mg/kg)on MK-801-induced (0.25 mg/kg) deficit in prepulse inhibition (PPI) were examined in 48 rats with 8~10 animals per group. Results Risperidone (0.10 mg/kg) and paliperidone (0.05 mg/kg) diminished the MK-801-induced hyperactivity (P<0.05). But paliperidone (0.10, 0.20 mg/kg) group did not affect locomotor activity compared to the control group. Risperidone (0.10 mg/kg) and different doses of paliperidone (0.10, 0.50, 1.00 mg/kg) enhanced the PPI baseline in rats. However, only risperidone (0.10 mg/kg), but not paliperidone restored the MK-801-induced deficits in PPI. Conclusion Risperidone and paliperidone have different pharmacological actions on MK-801-induced hyperactivity and deficits in prepulse inhibition in rats, suggesting that pharmacological actions of paliperidone are different from those of risperidone, although paliperidone is the active metabolite of risperidone.

Objective To examine the sex differences in prescribing patterns of psychotropic drugs and drug-induced side effects in schizophrenia patients in China. Methods Using the same design and a standardized protocol as in 2002 and 2006, the cross-sectional survey was conducted from July to August, 2012 in 45 psychiatric hospitals/centers in 10 provinces and municipalities in China. Inpatients and outpatients with schizophrenia were consecutively screened for eligibility for this study. Sociodemographic characteristics and prescription pattern were collected by using a modified questionnaire for the study. Data comparisons between male and female were performed with univariate analysis. Multiple logistic regression analysis was employed to determine the gender differences in prescription pattern and drug-induced side effects. Results The sample consisted of 2 260 male and 1 979 female patients. Univariate analyses showed that male patients were younger than female patients(t=5.398), having an earlier age at onset(t=5.662), higher percentage of being employed(χ2=31.597), and more negative symptoms(χ2=10.814)and aggressive behavior (χ2=5.816), more likely to receive clozapine (23.9%(472/1 979) vs. 28.5%(645/2 260),χ2=11.955), higher antipsychotic doses(476 mg vs. 514 mg,F=14.003), less use of antidepressants (7.9%(156/1 979) vs. 6.0%(136/2 260),χ2=5.722)and benzodiazepines(23.9%(472/1 979)vs. 20.0%(451/2 260),χ2=9.396), more frequent tardive dyskinesia(1.3%(25/1 979)vs. 2.1%(47/2 260),χ2=4.212)and less weight gain(11.0%(218/1 979)vs. 7.7%(173/2 260),χ2=14.233)and prolactin elevation(3.2%(63/1 979)vs. 1.7%(39/2 260),χ2=9.548;all P<0.05). In multivariate analyses, greater rate of clozapine use (OR=1.268,P=0.001), less rate of benzodiazepines use(OR=0.841,P=0.025) and antidepressants(OR=0.78,P=0.045),higher rate of tardive dyskinesia(OR=1.879,P=0.014)and less weight gain (OR=0.669,P=0.001) and prolactin elevation (OR=0.527,P=0.003) were independently associated with the male sex. Conclusion Gender is one of the independent contributors to psychotropic prescription pattern and side effects of antipsychotics in Chinese schizophrenia patients. Gender differences should be given more attention in research and clinical practice.

Objective To examine the sex differences in prescribing patterns of psychotropic drugs and drug-induced side effects in schizophrenia patients in China. Methods Using the same design and a standardized protocol as in 2002 and 2006, the cross-sectional survey was conducted from July to August, 2012 in 45 psychiatric hospitals/centers in 10 provinces and municipalities in China. Inpatients and outpatients with schizophrenia were consecutively screened for eligibility for this study. Sociodemographic characteristics and prescription pattern were collected by using a modified questionnaire for the study. Data comparisons between male and female were performed with univariate analysis. Multiple logistic regression analysis was employed to determine the gender differences in prescription pattern and drug-induced side effects. Results The sample consisted of 2 260 male and 1 979 female patients. Univariate analyses showed that male patients were younger than female patients(t=5.398), having an earlier age at onset(t=5.662), higher percentage of being employed(χ2=31.597), and more negative symptoms(χ2=10.814)and aggressive behavior (χ2=5.816), more likely to receive clozapine (23.9%(472/1 979) vs. 28.5%(645/2 260),χ2=11.955), higher antipsychotic doses(476 mg vs. 514 mg,F=14.003), less use of antidepressants (7.9%(156/1 979) vs. 6.0%(136/2 260),χ2=5.722)and benzodiazepines(23.9%(472/1 979)vs. 20.0%(451/2 260),χ2=9.396), more frequent tardive dyskinesia(1.3%(25/1 979)vs. 2.1%(47/2 260),χ2=4.212)and less weight gain(11.0%(218/1 979)vs. 7.7%(173/2 260),χ2=14.233)and prolactin elevation(3.2%(63/1 979)vs. 1.7%(39/2 260),χ2=9.548;all P<0.05). In multivariate analyses, greater rate of clozapine use (OR=1.268,P=0.001), less rate of benzodiazepines use(OR=0.841,P=0.025) and antidepressants(OR=0.78,P=0.045),higher rate of tardive dyskinesia(OR=1.879,P=0.014)and less weight gain (OR=0.669,P=0.001) and prolactin elevation (OR=0.527,P=0.003) were independently associated with the male sex. Conclusion Gender is one of the independent contributors to psychotropic prescription pattern and side effects of antipsychotics in Chinese schizophrenia patients. Gender differences should be given more attention in research and clinical practice.

Objective To analyze the risk factors of socio-demographic and clinical characteristics related to sui?cidal attempt in major depressive disorder (MDD) patients with anxious characteristics. Methods Based on the anxious module of Mini International Neuropsychiatric Interview (MINI), a total of 728 anxious MDD patients from 13 major men?tal health centers in China were classified as suicidal and non-suicidal attempt groups. Further analyses regarding risk factors of suicidal attempt in anxious MDD patients were performed by the multivariate logistic regression analysis. Re?sults Among the 728 patients with anxious MDD analyzed, 135 (18.5%) of them had suicidal attempt and 593 (81.5%) had non-suicidal attempt. Compared to the non-suicidal attempt group, patients with suicidal attempt had significantly earlier age onset[(32.3 ± 11.9) vs. (35.3 ± 13.1)], more lifetime depression episodes (median:2 vs. 2), more number of ad?missions (median: 1 vs. 0), more frequent depressive episodes (14.8% vs. 7.4%), more atypical characteristics (25.9%vs.15.0%), more suicidal ideation (78.5%vs. 50.3%) and more antidepressant use (81.5%vs. 71.2%). Logistic regression analysis showed that number of admissions (OR=1.18, 95%CI:1.02~1.37), frequent depressive episodes (OR=2.10, 95%CI:1.14~3.68), depressive episodes with suicidal ideation (OR=3.55, 95%CI:2.28~5.54) were associated with suicidal at?tempt in MDD patients with anxious characteristics (P<0.05). Conclusions More number of admissions, more frequent depressive episodes, comorbid suicidal ideation may be risk factors of suicidal attempt in anxious MDD patients.

Objective:To compare the suicidality risk in major depressive disorder (MDD)patients with and without anxious characteristics,and analyze the risk factors of suicidality in MDD patients. Methods:This was a secondary analysis of the data from the Diagnostic Assessment Service for people with Bipolar Disorders in China (DASP),which was initiated by the Chinese Society of Psychiatry (CSP),from September 1,2010 to February 28, 201 1. Based on the anxious module and suicide module of Mini International Neuropsychiatric Interview (M. I. N. I),1 172 MDD patients were classified as suffering from anxious MDD (n=728,62. 1%)and non-anxious MDD(n=444,37. 9%). Logistic regression was employed to examine the risk factors of suicidality in MDD pa-tients. Results:Among the anxious MDD patients,331 (45. 5%)of them had suicidality risk. And 54(12. 2%)of non-anxious MDD patients had suicidality risk. Compare to the non-anxious group,the anxious MDD patients had significantly higher suicidality risk (P<0. 00 1 ). Logistic regression analysis showed that more frequent depressive episodes (OR=2. 07 ),depressive episodes with psychotic symptoms (OR=2. 0 1 ),comorbid with anxious charac-teristics (OR=3. 18)or melancholic characteristics (OR=2. 90)were associated with suicidality risk in patients with MDD. Conclusion:It indicates that the anxious MDD patients may have higher suicidality risk than non-anx-ious MDD patients,and more frequent depressive episodes,depressive episodes with psychotic symptoms,comorbid with anxious characteristics or melancholic characteristics may be risk factors of suicidality in patients with MDD.