1.Analysis of serum inflammatory factors associated with antihistamine resistance in patients with chronic spontaneous urticaria using the Olink-targeted proteomics technology
Bihua LIANG ; Ziyan CHEN ; Huaping LI ; Hui ZOU ; Tianyi LIN ; Xiaofeng LI ; Luoyu ZHANG ; Shengxin LI ; Shanshan OU ; Jiaoquan CHEN ; Runxiang LI ; Huilan ZHU
Chinese Journal of Dermatology 2025;58(6):523-529
Objective:To analyze serum inflammatory factors associated with antihistamine resistance in patients with chronic spontaneous urticaria (CSU) .Methods:A total of 88 CSU patients were enrolled from Guangzhou Dermatology Hospital from January 2022 to December 2024. All patients received antihistamine treatment according to the "Guideline for diagnosis and treatment of urticaria in China (2022) " . Based on the 7-day urticaria activity score (UAS7) after 4-week treatment, these patients were divided into an antihistamine-sensitive group and an antihistamine-resistant group. Serum levels of inflammatory factors at the initial visit were analyzed using the Olink-targeted proteomics technology. Specific biomarkers associated with antihistamine resistance were identified, and Spearman correlation analysis was carried out to analyze correlations among differentially expressed proteins. A logistic regression model was constructed based on the Olink proteomics data, and the predictive performance of the model was evaluated using receiver operating characteristic (ROC) curve analysis. Measurement data were expressed as mean ± standard deviation or median (lower quartile, upper quartile) .Results:The 88 CSU patients aged 12 to 81 (38.78 ± 13.89) years, with the disease duration being 18 (7.00, 60.00) months. There were 32 patients in the antihistamine-sensitive group and 56 in the antihistamine-resistant group. No significant differences were found between the two groups in terms of age, disease duration, gender, or history of allergic diseases (all P > 0.05) . After 4 weeks of antihistamine treatment, the UAS7 score was significantly higher in the antihistamine-resistant group (25.00 [15.25, 31.00] points) than in the antihistamine-sensitive group (0.50 [0.00, 4.00] points; Z = -7.08, P < 0.001) . The Olink-targeted proteomics identified 5 differentially expressed proteins between the two groups: compared with the antihistamine-sensitive group, the antihistamine-resistant group showed > 2-fold higher expression of fibroblast growth factor 19 (FGF19) , interleukin-15 receptor subunit alpha (IL-15RA) , eotaxin (CCL11) , and monocyte chemoattractant protein-1 (MCP-1) ; in contrast, the expression of sulfotransferase 1A1 (ST1A1) in the antihistamine-sensitive group was 2.54 times that in the antihistamine-resistant group. Among the differentially expressed proteins, MCP-1 showed the highest specificity (1.00) for predicting antihistamine resistance, followed by CCL11 (0.97) . Correlation analysis revealed a significant positive correlation between MCP-1 and CCL11, and a significant negative correlation between IL-15RA and ST1A1. ROC curve analysis showed that MCP-1 and CCL11 had area under the curve values of 0.603 and 0.630, respectively, in predicting antihistamine resistance. Conclusion:MCP-1 and CCL11 may be potential biomarkers for predicting antihistamine resistance in CSU patients.
2.Pain, agitation, and delirium practices in Chinese intensive care units: A national multicenter survey study.
Xiaofeng OU ; Lijie WANG ; Jie YANG ; Pan TAO ; Cunzhen WANG ; Minying CHEN ; Xuan SONG ; Zhiyong LIU ; Zhenguo ZENG ; Man HUANG ; Xiaogan JIANG ; Shusheng LI ; Erzhen CHEN ; Lixia LIU ; Xuelian LIAO ; Yan KANG
Chinese Medical Journal 2025;138(22):3031-3033
3.Effect of "four-staff co-management" follow-up mode on the control of risk factors and medium-term prognosis improvement in patients with coronary heart disease after PCI
Guoming ZHANG ; Cuilian DAI ; Jiajin CHEN ; Weimei OU ; Chengmin HUANG ; Zhixian LIU ; Zhiyuan JIN ; Jiyi LIN ; Bin WANG ; Xiaofeng GE ; Suiji LI ; Xiang CHEN ; Yan WANG
Chinese Journal of General Practitioners 2025;24(4):426-433
Objective:To investigate the effect of "four-staff co-management" follow-up mode on risk factor control and medium-term prognosis improvement in patients with coronary heart disease after percutaneous coronary intervention (PCI).Methods:This was a intervention study. Patients with coronary heart disease who were admitted to the Xiamen Cardiovascular Hospital of Xiamen University from June 2021 to January 2022 and successfully discharged after PCI were included. According to the different types of follow-up after discharge, patients were divided into the traditional follow-up group and the "four-staff co-management" follow-up group. The "four-staff co-management" follow-up mode means that specialists, specialist managers in third-level A hospitals and general practitioners and health managers in basic hospitals were jointly responsible for post-discharge follow-up of PCI patients. Baseline clinical data were collected. The primary endpoints were the rate of compliance of coronary heart disease risk factor control at 12 months after surgery, the rate of secondary surgery, and the incidence of mid-term major adverse cardiovascular and cerebrovascular events (MACCE). Unplanned secondary PCI included symptom-driven secondary PCI and asymptomatic secondary PCI. MACCE includes myocardial infarction, hospitalization for heart failure, stroke, major bleeding, all-cause death, and composite endpoints including these events.Results:A total of 2 181 patients were enrolled, including 1 097 patients in the traditional follow-up group and 1 084 patients in the "four-staff co-management" follow-up group. At baseline, there were no statistically significant differences in gender, age, discharge diagnosis, co-existing diseases, echocardiographic indexes, and coronary artery lesions between the two groups (all P>0.05). There were no significant differences between the two groups in total PCI stent length, maximum internal diameter of stent, proportion of patients using drug balloon, proportion of patients with a planned second surgery during hospitalization, and discharge with drugs (all P>0.05). Twelve months after PCI, the reduction in HbA1c and low-density lipoprotein cholesterol was greater in the "four-staff co-management " follow-up group than that in the traditional follow-up group (all P<0.05), and the rate of reaching the standard for low-density lipoprotein cholesterol was higher than that in the traditional follow-up group ( P=0.001), but there was no statistical significance between the two groups for blood pressure and blood glucose (all P>0.05). During the follow-up period, the proportion of symptom-driven second operation patients was lower in the "four-staff co-management" follow-up group than that in the traditional follow-up group ( P<0.001), and there was no significant difference in the proportion of asymptomatic second operation patients between the two groups ( P=0.191). The proportion of hospitalized patients with heart failure in the "four-staff co-management" follow-up group was lower than that in the traditional follow-up group ( P=0.029), and there was no significant difference in the proportion of myocardial infarction, cerebral infarction, cerebral hemorrhage, massive hemorrhage, death and complex endpoint events between the two groups (all P>0.05). Conclusion:The "four-staff co-management" follow-up mode can effectively improve the control of risk factors and medium-term prognosis in patients with coronary heart disease after PCI.
4.Analysis of serum inflammatory factors associated with antihistamine resistance in patients with chronic spontaneous urticaria using the Olink-targeted proteomics technology
Bihua LIANG ; Ziyan CHEN ; Huaping LI ; Hui ZOU ; Tianyi LIN ; Xiaofeng LI ; Luoyu ZHANG ; Shengxin LI ; Shanshan OU ; Jiaoquan CHEN ; Runxiang LI ; Huilan ZHU
Chinese Journal of Dermatology 2025;58(6):523-529
Objective:To analyze serum inflammatory factors associated with antihistamine resistance in patients with chronic spontaneous urticaria (CSU) .Methods:A total of 88 CSU patients were enrolled from Guangzhou Dermatology Hospital from January 2022 to December 2024. All patients received antihistamine treatment according to the "Guideline for diagnosis and treatment of urticaria in China (2022) " . Based on the 7-day urticaria activity score (UAS7) after 4-week treatment, these patients were divided into an antihistamine-sensitive group and an antihistamine-resistant group. Serum levels of inflammatory factors at the initial visit were analyzed using the Olink-targeted proteomics technology. Specific biomarkers associated with antihistamine resistance were identified, and Spearman correlation analysis was carried out to analyze correlations among differentially expressed proteins. A logistic regression model was constructed based on the Olink proteomics data, and the predictive performance of the model was evaluated using receiver operating characteristic (ROC) curve analysis. Measurement data were expressed as mean ± standard deviation or median (lower quartile, upper quartile) .Results:The 88 CSU patients aged 12 to 81 (38.78 ± 13.89) years, with the disease duration being 18 (7.00, 60.00) months. There were 32 patients in the antihistamine-sensitive group and 56 in the antihistamine-resistant group. No significant differences were found between the two groups in terms of age, disease duration, gender, or history of allergic diseases (all P > 0.05) . After 4 weeks of antihistamine treatment, the UAS7 score was significantly higher in the antihistamine-resistant group (25.00 [15.25, 31.00] points) than in the antihistamine-sensitive group (0.50 [0.00, 4.00] points; Z = -7.08, P < 0.001) . The Olink-targeted proteomics identified 5 differentially expressed proteins between the two groups: compared with the antihistamine-sensitive group, the antihistamine-resistant group showed > 2-fold higher expression of fibroblast growth factor 19 (FGF19) , interleukin-15 receptor subunit alpha (IL-15RA) , eotaxin (CCL11) , and monocyte chemoattractant protein-1 (MCP-1) ; in contrast, the expression of sulfotransferase 1A1 (ST1A1) in the antihistamine-sensitive group was 2.54 times that in the antihistamine-resistant group. Among the differentially expressed proteins, MCP-1 showed the highest specificity (1.00) for predicting antihistamine resistance, followed by CCL11 (0.97) . Correlation analysis revealed a significant positive correlation between MCP-1 and CCL11, and a significant negative correlation between IL-15RA and ST1A1. ROC curve analysis showed that MCP-1 and CCL11 had area under the curve values of 0.603 and 0.630, respectively, in predicting antihistamine resistance. Conclusion:MCP-1 and CCL11 may be potential biomarkers for predicting antihistamine resistance in CSU patients.
5.Clinical Observation of Electroacupuncture at Acupoints Distributed on the Conception Vessel and Governor Vessel for Ischemic Stroke Complicated with Dysphagia
Wenshu ZHANG ; Yu WANG ; Yuli WU ; Xiaofeng OU ; Fen XU ; Mingying SUN
Journal of Guangzhou University of Traditional Chinese Medicine 2025;42(7):1621-1628
Objective To evaluate the clinical efficacy of electroacupuncture at acupoints distributed on conception vessel(CV)and governor vessel(GV)in treating ischemic stroke(AIS)complicated with dysphagia and explore its potential mechanism.Methods A total of 120 patients diagnosed with AIS complicated with dysphagia at Hangzhou TCM Hospital Affiliated to Zhejiang Chinese Medical University from December 2020 to December 2023 were enrolled and randomly divided into an observation group and a control group,with 60 patients per group.The control group received conventional swallowing training,while the observation group received additional electroacupuncture at acupoints distributed on CV and GV.The treatment lasted for 4 weeks.After 1 month of treatment,clinical efficacy was assessed,and the changes in Standardized Swallowing Assessment(SSA)scores,National Institutes of Health Stroke Scale(NIHSS)scores,hyolaryngeal mobility(thyroid cartilage anterior/superior displacement,hyoid bone anterior/superior displacement),and KubotaWater Swallowing Test scores were observed.Cerebral microcirculation parameters and the Chinese version of the Eating/Drinking Quality of Life(EDQoL)questionnaire were also compared.Safety and adverse events were evaluated.Results(1)The total effective rate in the observation group was 95.00%(57/60),compared to 76.67%(46/60)in the control group,demonstrating statistically superior therapeutic efficacy in the observation group(P<0.05).(2)After treatment,both groups showed significant improvements in SSA scores and NIHSS scores(P<0.05),with the observation group exhibiting markedly better enhancement in both SSA and NIHSS scores compared to the control group,showing statistically significant differences(P<0.05).(3)After intervention,significant improvements were observed in anterior displacement of thyroid cartilage,superior displacement of thyroid cartilage,anterior displacement of hyoid bone,and superior displacement of hyoid bone in both groups(P<0.05).The observation group outperformed the control group in all these laryngeal kinematic parameters with statistically significant differences(P<0.05).(4)Both groups demonstrated significant improvement in Kubota Water Swallowing Test scores after treatment(P<0.05),with the observation group displaying statistically greater improvement than the control group(P<0.05).(5)Cerebral arterial parameters including peak systolic velocity(Vs),mean velocity(Vm),and resistance index(RI)were significantly improved in both groups after treatment(P<0.05).The observation group showed superior enhancement in these cerebrovascular hemodynamic indices compared to the control group(P<0.05).(6)Significant improvements in EDQoL scores were observed in both groups after treatment(P<0.05),with the observation group achieving statistically greater improvement than the control group(P<0.05).(7)The total incidence of adverse reactions was 1.67%(1/60)in the observation group versus 11.67%(7/60)in the control group,indicating a statistically significant lower adverse event rate in the observation group(P<0.05).Conclusion Electroacupuncture at acupoints distributed on CV and GV effectively alleviates dysphagia and neurological impairment,improves hyolaryngeal mobility and cerebral microcirculation,enhances quality of life,and reduces adverse events such as aspiration pneumonia in AIS patients complicated with dysphagia.
6.Effect of "four-staff co-management" follow-up mode on the control of risk factors and medium-term prognosis improvement in patients with coronary heart disease after PCI
Guoming ZHANG ; Cuilian DAI ; Jiajin CHEN ; Weimei OU ; Chengmin HUANG ; Zhixian LIU ; Zhiyuan JIN ; Jiyi LIN ; Bin WANG ; Xiaofeng GE ; Suiji LI ; Xiang CHEN ; Yan WANG
Chinese Journal of General Practitioners 2025;24(4):426-433
Objective:To investigate the effect of "four-staff co-management" follow-up mode on risk factor control and medium-term prognosis improvement in patients with coronary heart disease after percutaneous coronary intervention (PCI).Methods:This was a intervention study. Patients with coronary heart disease who were admitted to the Xiamen Cardiovascular Hospital of Xiamen University from June 2021 to January 2022 and successfully discharged after PCI were included. According to the different types of follow-up after discharge, patients were divided into the traditional follow-up group and the "four-staff co-management" follow-up group. The "four-staff co-management" follow-up mode means that specialists, specialist managers in third-level A hospitals and general practitioners and health managers in basic hospitals were jointly responsible for post-discharge follow-up of PCI patients. Baseline clinical data were collected. The primary endpoints were the rate of compliance of coronary heart disease risk factor control at 12 months after surgery, the rate of secondary surgery, and the incidence of mid-term major adverse cardiovascular and cerebrovascular events (MACCE). Unplanned secondary PCI included symptom-driven secondary PCI and asymptomatic secondary PCI. MACCE includes myocardial infarction, hospitalization for heart failure, stroke, major bleeding, all-cause death, and composite endpoints including these events.Results:A total of 2 181 patients were enrolled, including 1 097 patients in the traditional follow-up group and 1 084 patients in the "four-staff co-management" follow-up group. At baseline, there were no statistically significant differences in gender, age, discharge diagnosis, co-existing diseases, echocardiographic indexes, and coronary artery lesions between the two groups (all P>0.05). There were no significant differences between the two groups in total PCI stent length, maximum internal diameter of stent, proportion of patients using drug balloon, proportion of patients with a planned second surgery during hospitalization, and discharge with drugs (all P>0.05). Twelve months after PCI, the reduction in HbA1c and low-density lipoprotein cholesterol was greater in the "four-staff co-management " follow-up group than that in the traditional follow-up group (all P<0.05), and the rate of reaching the standard for low-density lipoprotein cholesterol was higher than that in the traditional follow-up group ( P=0.001), but there was no statistical significance between the two groups for blood pressure and blood glucose (all P>0.05). During the follow-up period, the proportion of symptom-driven second operation patients was lower in the "four-staff co-management" follow-up group than that in the traditional follow-up group ( P<0.001), and there was no significant difference in the proportion of asymptomatic second operation patients between the two groups ( P=0.191). The proportion of hospitalized patients with heart failure in the "four-staff co-management" follow-up group was lower than that in the traditional follow-up group ( P=0.029), and there was no significant difference in the proportion of myocardial infarction, cerebral infarction, cerebral hemorrhage, massive hemorrhage, death and complex endpoint events between the two groups (all P>0.05). Conclusion:The "four-staff co-management" follow-up mode can effectively improve the control of risk factors and medium-term prognosis in patients with coronary heart disease after PCI.
7.Observation on the outcome of occupational chronic benzene poisoning treated with acupuncture combined with Du-Moxibustion
Ying ZHENG ; Lili LAI ; Xiaofeng DENG ; Chunyue FAN ; Jin WU ; Min OU ; Shufang YAO ; Hailan WANG
China Occupational Medicine 2024;51(2):210-213
ObjectiveTo investigate the effects of acupuncture combined with Du-Moxibustion (ADM) on peripheral blood cell count and levels of immune factors in patients with occupational chronic benzene poisoning. Methods A total of 70 patients with occupational chronic benzene poisoning (leukopenia and neutropenia) were selected as the research subjects by judgement sampling method. They were randomly divided into a control group and an ADM group using a random number table method, with 35 cases in each group. Patients in the control group were treated with conventional Western medicine such as leukocyte boosting and symptomatic treatment. While patients in the ADM group were treated with ADM treatment in addition to treatments of the control group, once per week for five consecutive weeks. Peripheral blood samples of patients were collected before and after treatment from both groups, to detect cell counts and serum levels of immune factors. Results The white blood cell count, red blood cell count, absolute lymphocyte count, absolute neutrophil count, platelet count, and levels of hemoglobin, immunoglobulins (Ig) A, IgM, IgG, complement C3 and complement C4 of patients in both groups improved after treatment compared with those before treatment (all P<0.05). The white blood cell count, levels of IgA, IgM, IgG, complement C3 and complement C4 of patients in the ADM group were higher than those in the control group after treatment (all P<0.05). Conclusion ADM treatment can increase peripheral blood white blood cells and serum levels of immune factor in patients with occupational chronic benzene poisoning (leukopenia, neutropenia), which helps improve patient recovery and can be promoted clinically.
8.Predictors of poor short-term outcome in patients with autoimmune encephalitis
Kengna FAN ; Qishui OU ; Xiaofeng LIU
Chinese Journal of Laboratory Medicine 2022;45(1):24-29
Objective:To analyze the risk factors of poor short-term outcome in patients with autoimmune encephalitis (AE).Methods:The data were collected retrospectively from patients hospitalized in the First Affiliated Hospital of Fujian Medical University from March 2016 to January 2021. According to the Modified Rankin Scale (mRS), eighty-one patients with AE were divided into the good prognosis group (mRS≤2, n=48) and the poor prognosis group (mRS>2, n=33). The clinical data, including the basic demographic data, main clinical manifestations, cranial MRI and electroencephalogram, as well as laboratory indicators from blood and cerebrospinal fluid (CSF), were compared between two groups, and the risk factors for poor outcome were analyzed by multivariate logistic regression. The receiver operating characteristic (ROC) curve was used to determine the cut-off value of these risk factors on predicting the poor short-term outcome for the AE patients. Results:The time of hospitalization was significantly longer in the poor prognosis group than in the good prognosis group ( P<0.05). Prevalence of severe disease course at admission, abnormal mental and behavior, δ wave and δ brush of abnormal EEG was significantly higher in the poor prognosis group than in the good prognosis group (all P<0.05). Serum leukocyte count, neutrophil count, lymphocyte count, mononuclear cell count, C-reactive protein, procalcitonin(PCT), alanine aminotransferase, aspartate transaminase, lactate dehydrogenase, creatine kinase, creatine kinase isoenzyme, apoA1/B, calcium, sodium, anion gap in serum, CSF oligoclonal bands, CSF-IgG index and antibody titer were significantly different between the two groups (all P<0.05). Severity of illness at admission ( OR=1.816, 95% CI 1.250-2.639, P=0.002), PCT ( OR=1.345, 95% CI 1.008-1.794, P=0.044), antibody titer in serum ( OR=1.422, 95% CI 1.071-1.888, P=0.015), CSF-IgG index ( OR=1.802, 95% CI 1.035-3.138, P=0.037) and anionic gap ( OR=1.640, 95% CI 1.191-2.259, P=0.002) were the independent risk factors for the poor short-term prognosis of patients with AE. The AUC value of combing the above 5 indexes to predict the poor short-term prognosis in patients with AE was 0.920 (95% CI 0.834-0.971), with 83.87% sensitivity and 88.37% specificity. Conclusion:Severity of illness at admission, PCT, antibody titer in serum, CSF-IgG index and anionic gap are the independent risk factors of poor short-term prognosis in patients with AE and the combination of these 5 indexes can sufficiently predict the poor short-term prognosis in patients with AE.
9.Effects of different fluid resuscitation on renal function and glycocalyx in septic shock rats
Yusi HUA ; Min HE ; Ruoran WANG ; Xiaofeng OU
Chinese Journal of Internal Medicine 2021;60(6):552-555
To investigate the effects of different fluid resuscitation on renal function and glycocalyx in septic shock rats. The septic shock SD rats (induced by lipopolysaccharide) were randomly divided into control group, normal saline resuscitation group, Lactate Ringer′s solution resuscitation group and succinyl gelatin resuscitation group ( n=6 each). The mean arterial pressure, heart rate, serum creatinine (Scr), urea nitrogen (BUN), renal blood flow, renal tissue pathology, serum interleukin-6, tumor necrosis factor α and glycocalyx were measured at baseline, the development of septic shock, 0 hour and 8 hours after resuscitation. When shock was established, the renal blood flow significantly decreased ( P<0.05) and recovered to normal at 0 hour and 8 hours after resuscitation. Compared with normal saline group and succinyl gelatin group, the levels of Scr, BUN and glycocalyx components (heparan sulfate, syndecan-1) were significant lower in Lactate Ringer′s solution group ( P<0.05). The pathology of kidney tissue suggested that the microscopic ischemic damage with Lactate Ringer′s solution were minor than the other two groups. Compared with normal saline and succinyl gelatin, Lactate Ringer′s solution can reduce the damage of renal function and glycocalyx in septic shock rats.
10.Clinical characteristics of coronavirus disease 2019 infected with Delta variant in Guangzhou:A real-world study
Danwen ZHENG ; Heng WENG ; Yuntao LIU ; Xin YIN ; Jun ZHANG ; Jian ZHANG ; Luming CHEN ; Yuanshen ZHOU ; Jing ZENG ; Yan CAI ; Wanxin WEN ; Qinghua ZHANG ; Lanting TAO ; Liangsheng SUN ; Tianjin CAI ; Weiliang WANG ; Shubin CAI ; Xindong QIN ; Xiaofeng LIN ; Xiaohua XU ; Haimei ZOU ; Qiaoli HUA ; Peipei LU ; Jingnan LIN ; Kaiyuan ZHANG ; Aihua OU ; Jiqiang LI ; Fang YAN ; Xu ZOU ; Lin LIN ; Banghan DING ; Jianwen GUO ; Tiehe QIN ; Yimin LI ; Xiangdong GUAN ; Xiaoneng MO ; Zhongde ZHANG
Chinese Journal of Emergency Medicine 2021;30(10):1220-1228
Objective:To summarize the clinical characteristics of patients with coronavirus disease 2019 (COVID-19) infected with Delta variant, so as to provide further references for clinical diagnosis and treatment.Methods:A real-world study was conducted to analyze the characteristics of 166 COVID-19 patients infected with Delta variant at Guangzhou Eighth People’s Hospital, Guangzhou Medical University.Results:The study enrolled 5 asymptomatic cases, 123 non-severe cases (mild and moderate type), and 38 severe cases (severe and critical type). Among these patients, 69 (41.6%) were male and 97 (58.4%) were female, with a mean age of 47.0±23.5 years. Thirty-nine cases (23.5%) had received 1 or 2 doses of inactivated vaccine. The incidence of severe COVID-19 cases was 7.7% in 2-doses vaccinated patients, which was lower than that of 11.5% in 1-dose and 26.8% in unvaccinated patients. The proportion of severe cases in 2 dose-vaccinated patients was 7.7%, which was lower than that of 11.5% in 1-dose vaccinated patients and 26.8% in unvaccinated patients, but the difference was not significant ( P>0.05). The most common clinical symptom was fever (134 cases, 83.2%), and 39.1% of cases presented with high-grade fever (≥39 °C); other symptoms were cough, sputum, fatigue, and xerostomia. The proportion of fever in severe cases was significantly higher than that of non-severe cases (97.4% vs. 76.4%, P<0.01). Similarly, the proportion of severe cases with high peak temperature (≥39 ℃) () was also higher than that of non-severe cases (65.8% vs. 30.9%, P<0.01). The median minimal Cycle threshold (Ct) values of viral nucleic acid N gene and ORFlab gene were 20.3 and 21.5, respectively, and the minimum Ct values were 11.9 and 13.5, respectively. Within 48 h of admission, 9.0% of cases presented with decreased white blood cell counts, and 52.4% with decreased lymphocyte counts. The proportions of increased C-reactive protein, serum amyloid A, interleukin 6, and interleukin 10 were 32.5%, 57.4%, 65.3%, and 35.7%, respectively. The proportions of elevated C-reactive protein, serum amyloid A and interleukin-6 in severe cases were significantly higher than those in non-severe cases ( P<0.01). Logistic regression analysis showed that older age and higher peak temperature were associated with a higher likelihood of severe cases ( OR>3, 95% CI: 2-7, P<0.01). In terms of treatment, traditional Chinese medicine (TCM) was used in 97.6% of non-severe cases and 100% in severe cases. Other treatments included respiratory and nutritional support, immunotherapy (such as neutralizing antibodies and plasma of recovered patients). The median times from admission to progression to severe cases, of fever clearance, and of nucleic acid conversion were 5 days, 6 days and 19 days, respectively. No deaths were reported within 28 days. Conclusions:The symptoms of Delta variant infection in Guangzhou are characterized by a high proportion of fever, high peak temperature, long duration of fever, high viral load, a long time to nucleic acid conversion, and a high incidence of severe cases. The severe cases exhibit a higher percentage of elderly patients, a longer duration of fever and have a higher fever rate and a higher hyperthermia rate than non-severe cases. Age and hyperthermia are independent risk factors for progression to severe disease. The combination of TCM and Western medicine can control the progression of the disease effectively.

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