Objective: To determine 17 types of phthalic acid esters (PAEs) in drinking water using solid-phase extraction coupled with gas chromatography-mass spectrometry (GC-MS) in multiple reaction monitoring (MRM) mode. Methods: One litre of commercially available bottled water was purified using an HLB solid-phase extraction column, and was eluted with ethyl acetate, dichloromethane and average methanol. Seventeen types of PAEs were detected using a triple quadrupole gas chromatography-mass spectrometer in MRM mode. By optimizing the temperature programming and adjusting the mass spectrometry collision energy, collection efficiency was improved and matrix interference was reduced. The precision and accuracy of this method were assessed by determining the standard curves, detection limits, quantification limits, relative standard deviations (RSD) and average spiked recovery rates for the 17 types of PAEs. Results: The 17 types of PAEs showed good linear relationships between mass concentration and chromatographic peak areas in the range of 0.02 to 1.0 mg/L, with correlation coefficients all greater than 0.999 1. The detection limits ranged from 0.002 9 to 0.009 7 mg/kg, the quantification limits ranged from 0.008 7 to 0.029 1 mg/kg, the RSD ranged from 0.8% to 3.0%, and the average spiked recovery rates ranged from 88.8% to 111.8%. Conclusion Solid-phase extraction coupled with MRM of GC-MS can better determine low concentrations of PAEs in drinking water.

Objective: To analyze the distribution characteristics of immunoglobulin A (IgA) concentration in Nanning Zhuang blood donors by measuring the concentration of plasma IgA. Methods: Enzyme-linked immunosorbent assay (ELISA) was performed to measure the absorbance of 2 000 plasma samples from Zhuang blood donors. The IgA concentration in samples was calculated using the ELISA Calc regression/fitting technology program. Results: The standard curve demonstrated that ELISA detection of plasma IgA concentration exhibited good precision. The frequency of IgA deficiency was 0/2 000. No statistically significant difference in the distribution of IgA concentration was observed between males and females (P>0.05). The distribution of IgA concentration varied significantly across age groups: younger individuals (18-39 years old) had lower plasma IgA levels (mg/dL) compared to older individuals (40-56 years old): 5-89.99 mg/dL group, 8.80% (176/2 000) vs 17.20% (344/2 000); 90-450 mg/dL group,20.65% (413/2 000) vs 51.20% (1 024/2 000); >450 mg/dL group, 0.45%, (9/2 000) vs 1.70% (34/2 000), P<0.05. No significant difference in IgA concentration was found among different ABO blood types in Zhuang blood donors (P>0.05). Spearman correlation analysis revealed a positive correlation between age and IgA concentration (R =0.114, P<0.05). Conclusion: No individuals with IgA deficiency were screened out among the Zhuang blood donors in Nanning area, and plasma IgA levels progressively increase with age.

Objective: To investigate the predictive value of EZH2 expression for malignant transformation in oral leukoplakia (OLK) and to provide a reference for clinical practice. Methods: This study was approved by the institutional ethics committee, and informed consent was obtained from all participants. A total of 114 patients diagnosed with OLK by pathological examination and treated at our hospital between November 2020 and July 2022 were initially enrolled. After excluding those with incomplete data or follow-up, 105 participants were included in the final analysis, comprising 14 in the high EZH2 expression group and 91 in the low EZH2 expression group. Histopathological examination of oral mucosa and immunohistochemical detection of EZH2 protein expression were performed. The follow-up period was 30 months; participants were followed until malignant transformation occurred or until the end of follow-up, at which point they were withdrawn from the study. The exposure factor was the level of EZH2 protein expression, and the outcome was the malignant transformation rate of OLK. Differences in EZH2 expression levels and transformation outcomes were analyzed. Results: There were no statistically significant differences between the high and low EZH2 expression groups in terms of age, sex, history of systemic disease, lifestyle habits, psychological status, diet, and sleep conditions (P > 0.05). Lesions in the high EZH2 expression group were mainly located on the ventral tongue, while in the low EZH2 expression group, they were more commonly found on the dorsal tongue and buccal mucosa. The malignant transformation rate was 28.6% (4/14) in the high expression group and 8.8% (8/91) in the low expression group; these differences were not statistically significant (P=0.053). In univariate Cox regression analysis, the risk of malignant transformation in the high EZH2 expression group was 3.647 times that of the low EZH2 expression group (HR = 3.647, 95% CI: 1.097-12.120, P<0.05). Kaplan-Meier survival analysis showed that over the 30-month follow-up period, the cancer-free survival rate in the high EZH2 expression group was 19.8% lower than in the low expression group, and the difference was statistically significant (P<0.05). In multivariate Cox regression analysis, only moderate and severe epithelial dysplasia were identified as independent risk factors for malignant transformation. The risk of malignant transformation in the moderate and severe dysplasia groups was 10.695 and 13.623 times higher, respectively, than in the mild dysplasia group (HR = 10.695, 95% CI: 2.270-50.396, P<0.05; HR=13.623, 95% CI: 1.918-96.774, P<0.05). EZH2 high expression was not an independent risk factor in the multivariate model (HR= 2.528, 95% CI: 0.752-8.500, P = 0.134). Conclusion High EZH2 protein expression is a risk factor for the malignant transformation of OLK but does not have independent predictive value.

Anopheles stephensi is an important malaria vector in many Southeast Asian countries, and is also a widely distributed Anopheles species in parts of Asia. As a potential vector of malaria and other mosquito-borne diseases, Anopheles stephensi had a relative wide distribution in China. This review gives a brief overview of the morphological characteristics and geographical distribution of Anopheles stephensi, which has been reported in South China, Southwest China and East China, including but not limited to Guangdong, Guangxi, Hainan, Guizhou, Sichuan, Xizang, Yunnan, Fujian and other provinces. Thanks to the continuous and effective disease surveillance and mosquito control strategies, the risk of malaria epidemic in China has been greatly reduced. However, Anopheles stepheni is highly invasive and adaptable, in addition to its rapid spread in global distribution, together with global climate anomalies and other factors, there still exists a certain transmission risk of the diseases related to Anopheles stepheni in some parts of China. In order to consolidate the achievements of malaria prevention and control, it is still necessary to conduct continuous monitoring of Anopheles stephensi and other malaria vectors, and to consolidate the implementation of malaria control measures in China.

[This corrects the article DOI: 10.1016/j.apsb.2019.01.013.].

Objective To provide some evidence for early empirical treatment of infections caused by Pseudanonas aeruginosa(PA)and establish a certain foundation for further studies on its resistance mechanisms.Analyzed the resistance rate of PA and the phenotype characteristics for seven years at this hospital.Methods Using Whonet 5.6 software,the drug sensitivity data of PA isolated and reported from clinical specimens at Kunming First People's Hospital from 2016 to 2022 were analyzed annually.Imipenem,meropenem,ceftazidime,and cefepime were the main observation objects,statisticaly analyze the resistance of other antibiotics under different drug resistance combinations of the above-mentioned drugs Results A total of 1 920 strains of PA were detected in 7 years,with polymyxins exhibiting the lowest resistance rate at 1%.The average resistance rates for Amikacin,Gentamicin and Tobramycin were 6.4%,8.6%and 5.1%,respectively.The resistance rates of Quinolones,Piperacillin/Tazobactam,Ceftazidime,and Cefepime were similar,ranging from 10%～20%.Imipenem and Meropenem did not show better sensitivity,with resistance rates of 21.3%and 18.4%,respectively.The resistance rates of major antibiotics have fluctuated over the past 7 years,mostly increasing from 2017 to reaching a peak in 2018 and then falling back.And then stabilized with the domestic average level.1 393 strains were sensitive to Imipenem,and the sensitivity rate of Meropenem in this part was 96.2%.1 451 strains were sensitive to Imipenem,and 89%of them were sensitive to Meropenem at the same time.369 strains were both resistant to Imipenem and Meropenem,and 33.1%of them were sensitive to Ceftazidime.The more resistant to β-lactam,the lower the sensitivity rate to Amikacin and Ciprofloxacin.Conclusion The overall drug sensitivity of PA in this hospital is relatively good.Should adhere to strict management of antibiotic use.Aminoglycosides can be the preferred drugs for empirical treatment,followed by Quinolones,and Carbapenems and Ceftazidime are also candidates.PA has diverse resistance mechanisms to β-lactam antimicrobials,and carbapenem-resistant strains can be mediated by different mechanisms or jointly.

Objective To explore the potential categories of fatigue trajectory in patients with diabetic peripheral neuropathy and analyze the influencing factors.Methods Convenience sampling method was used to select 426 patients with diabetic peripheral neuropathy who were hospitalized in a tertiary hospital in Jiangsu Province from April 2022 to April 2023.General information and disease related data of the patients were collected,and the Chinese version of Multi-dimensional Fatigue Scale,Pittsburgh Sleep Quality Index Scale,Social support Rating Scale,pain number rating scale and Tampa scale of kinetophobia were used to investigate at discharge(T1).The Chinese version of multi-dimensional fatigue scale was used to investigate 3 months after discharge(T2),6 months after discharge(T3),and 12 months after discharge(T4).A mixed growth model was used to identify the potential categories of fatigue trajectory and logistic regression were employed to analyze the influencing factors of fatigue.Results 414 patients finished the study.Three categories of fatigue trajectory in the patients with diabetic peripheral neuropathy were identified:significantly increasing group(19.6%),slowly increasing group(47.8%),and decreasing group(32.6%).Logistic regression analysis showed that age,sleep,social support,number of comorbidities,body mass index(BMI),pain and fear of exercise were the factors influencing the potential categories of fatigue trajectory in the DPN patients.Conclusions There are three potential categories of fatigue trajectories in DPN patients.Age,sleep disorders,social support,comorbidities,BMI,pain score,and exercise fear were influencing factors of fatigue in patients with DPN.

Objective To retrospectively analyze the blood use of transfusion-dependent thalassemia(TDT)patients in 9 designated transfusion medical institutions from 2018 to 2023 in Nanning,and to evaluate the effect of"three designated"blood transfusion mode(hereby means TDT patients undergoing blood transfusion in designated transfusion medical institu-tions regularly)and"collection-based-supply"blood management mode on blood security of TDT patients.Methods The"three designated"blood transfusion mode was implemented to ensure that TDT patients registered in the local household registration(referred to as the"register")obtain the rights and interests of outpatient transfusion and blood security of des-ignated medical institutions.The"collection-based-supply"blood management mode was implemented to assess the blood needs of"register"TDT patients and meet their needs to the maximum extent according to the blood inventory(collection).Results From 2018 to 2023,the total blood supply of"register"TDT patients was 10.37%of the total red blood supply of all medical institutions(138 509.5 U/1 335 788.0 U),with the highest proportion of type O blood as 46.34%(64 181.0 U/138 509.5 U)and the lowest proportion of type AB blood as 3.85%(5 331.0 U/138 509.5 U).In 2018,9 transfusion medical institutions were designated for TDT patients.There were a total of 766 TDT patients in the register,with the per ca-pita annual blood transfusion volume increased from20.28 U(15 531.0 U/766 patients)in2018 to36.01 U(27 586.0 U/766 patients)in 2023,maintaining a positive growth every year(30.26%,4.94%,11.71%,8.61%,4.94%and 7.10%).Conclusion The"three designated"blood transfusion mode and the"collection-based-supply"blood management mode can effectively guarantee the blood supply of TDT patients.