1.Consistency verification of reverse screening strategy for syphilis in maternal and child populations and assocliation between S/CO value and false positive rate of CLIA
Weiming LU ; Jiewen LI ; Chunming GU ; Junfei GUO ; Kefeng LAI ; Xianhua ZHENG ; Mingyong LUO
The Journal of Practical Medicine 2025;41(20):3249-3255
Objective To compare the diagnostic performance of two syphilis reverse testing protocols recommended by the U.S.Centers for Disease Control and Prevention(USCDC)and the European Centre for Disease Prevention and Control(ECDC)within maternal and child populations,and to explore the factors contributing to false-positive results in chemiluminescent immunoassays(CLIA).Methods A retrospective analysis was performed on serological test results from 109,003 patients collected between 2021 and 2023.All participants were initially screened for specific syphilis antibodies using CLIA,and those with positive results underwent confirmatory testing with both the toluidine red unheated serum test(TRUST)and the Treponema pallidum particle agglutination assay(TPPA).The kappa statistic was employed to assess the diagnostic agreement between the USCDC and ECDC protocols,while also analyzing the distribution patterns of CLIA false-positive results across varying S/CO value ranges and demographic groups.Results Both protocols achieved a syphilis positivity rate of 0.34%.The hospital's high-prevalence syphilis screening program identified no cases with CLIA-positive or TRUST-positive but TPPA-negative results,suggesting high specificity in this population.The two protocols demonstrated perfect agreement with a Kappa value of 1.0,indicating no significant difference in diagnostic performance between maternal and child populations.CLIA exhibited a true positive rate of 71.04%,which was positively correlated with S/CO values:21.88%when 1.010.The highest false positive rate for CLIA(38.75%)was observed among young adults,while the largest proportion of false positives-reaching 40.00%—was associated with pregnancy and abortion status.Conclusions The two reverse detection methods for syphilis exhibit comparable diagnostic efficacy in women and children from populations with low syphilis prevalence.CLIA demonstrates high sensitivity;however,when the S/CO ratio is less than 10,particularly in adult women of childbearing age,clinicians should remain vigilant for potential false-positive results to prevent misdiagnosis and unnecessary medical interventions.
2.Consistency verification of reverse screening strategy for syphilis in maternal and child populations and assocliation between S/CO value and false positive rate of CLIA
Weiming LU ; Jiewen LI ; Chunming GU ; Junfei GUO ; Kefeng LAI ; Xianhua ZHENG ; Mingyong LUO
The Journal of Practical Medicine 2025;41(20):3249-3255
Objective To compare the diagnostic performance of two syphilis reverse testing protocols recommended by the U.S.Centers for Disease Control and Prevention(USCDC)and the European Centre for Disease Prevention and Control(ECDC)within maternal and child populations,and to explore the factors contributing to false-positive results in chemiluminescent immunoassays(CLIA).Methods A retrospective analysis was performed on serological test results from 109,003 patients collected between 2021 and 2023.All participants were initially screened for specific syphilis antibodies using CLIA,and those with positive results underwent confirmatory testing with both the toluidine red unheated serum test(TRUST)and the Treponema pallidum particle agglutination assay(TPPA).The kappa statistic was employed to assess the diagnostic agreement between the USCDC and ECDC protocols,while also analyzing the distribution patterns of CLIA false-positive results across varying S/CO value ranges and demographic groups.Results Both protocols achieved a syphilis positivity rate of 0.34%.The hospital's high-prevalence syphilis screening program identified no cases with CLIA-positive or TRUST-positive but TPPA-negative results,suggesting high specificity in this population.The two protocols demonstrated perfect agreement with a Kappa value of 1.0,indicating no significant difference in diagnostic performance between maternal and child populations.CLIA exhibited a true positive rate of 71.04%,which was positively correlated with S/CO values:21.88%when 1.010.The highest false positive rate for CLIA(38.75%)was observed among young adults,while the largest proportion of false positives-reaching 40.00%—was associated with pregnancy and abortion status.Conclusions The two reverse detection methods for syphilis exhibit comparable diagnostic efficacy in women and children from populations with low syphilis prevalence.CLIA demonstrates high sensitivity;however,when the S/CO ratio is less than 10,particularly in adult women of childbearing age,clinicians should remain vigilant for potential false-positive results to prevent misdiagnosis and unnecessary medical interventions.
3.HIV-1 molecular transmission network among HIV/AIDS cases in Zhoushan City
CHEN Yuanjing ; LI Kefeng ; FAN Qin ; ZHANG Jiafeng ; WU Mingyu ; ZHANG Bo ; GU Songye ; WANG Hai ; CHENG Wei
Journal of Preventive Medicine 2024;36(10):834-837
Objective:
To investigate the characteristics of HIV-1 molecular transmission network among HIV/AIDS patients in Zhoushan City, Zhejing Province.
Methods:
The newly reported HIV/AIDS cases in Zhoushan City from 2020 to 2022 were selected. Basic information was collected and whole blood samples were obtained at the initial follow-up. The pol gene sequences of HIV-1 were amplified by RT-PCR and nested-PCR. HIV-1 subtypes were identified by Neighbor-Joining phylogenetic trees. The HIV-1 molecular transmission network was built and analyzed using Cytoscape 3.6.1 software.
Results:
A total of 222 HIV/AIDS cases were reported in Zhoushan City from 2020 to 2022, 200 whole blood samples were collected, and 152 sequences were obtained successfully, including 122 males (80.26%), 75 cases aged 50 years and above (49.34%), 109 cases with a junior high school education or below (71.71%), and 63 cases with commercial heterosexual contact (41.45%). The main subtypes were CRF07_BC and CRF01_AE, accounting for 45.39% and 21.05%, respectively. When the threshold of genetic distance was set to 1%, 20 molecular clusters were formed in 69 cases, with a clustering rate of 45.39%. Using the molecular network constituted by reported HIV/AIDS cases in 2020 as the baseline network, there were 2 active molecular clusters with ≥5 new cases in 2022, each with 9 cases, characterized mainly by individuals aged 50 or above, with a junior high school education or below, and transmission through commercial heterosexual sex.
Conclusions
The predominant HIV-1 subtypes among HIV/AIDS cases in Zhoushan City are CRF07_BC and CRF01_AE. Transmission through commercial heterosexual contact among middle-aged and elderly people is a main mode of HIV transmission.
4.Study on the correlation of visfatin level and atheros clerosis in patients with rheumatoid arthritis
Ting ZENG ; Jingzhong LU ; Dan SHI ; Kefeng GU ; Chaoying SONG
Chinese Journal of Rheumatology 2016;20(4):257-260
Objective To study the visfatin level changes in patients with rheumatoid arthritis (RA), and to study the correlation of visfatin level and atherosclerosis in RA.Methods Fifty cases of patients were divided to the plaque group (33 cases) and plaque-free group (17 cases) according to the carotid intima media thickness checked by carotid ultrasonography.In addition, their blood lipid level, homeostasis model assessment of insulin resistance (HOMA-IR), rheumatoid factors (RFs), anti-CCP, visfatin etc.were measured.Fifty healthy people were set as the control group.The correlation between the visfatin level of RA patients and atherosclerosis was analyzed.The statistical analysis was carried out with independent t-test,analysis of variance, Spearman correlation analysis and multiple stepwise regression.Results The serum visfatin level of RA plaques group was obviously higher than that of the plaque-free group [(47±22) μg/L vs (34±19) μg/L, t=4.361, P＜0.01].The serum visfatin level of RA patients was positively correlated to HOMA-IR (r=0.567, P=0.001), RF (r=0.502, P=0.003), anti-cyclic peptide containing citrulline, (anti-CCP) (r=0.420, P=0.038) and carotid artery IMT (r=0.596, P=0.001).High-density lipoprotein-C (OR=1.009, P=0.020), HOMA-IR (OR=1.450, P=0.006), anti-CCP (OR=1.005, P=0.014) and visfatin (OR=0.971, P=0.008) were independent relevant factors affecting carotid artery IMT.Conclusion The serum visfatin level of RA patients is closely related to atherosclerosis.
5.FBD used to improve learning and memory function of animals
Wenxin DONG ; Kefeng RUAN ; Fenghua GU ; Pingrang SHEN ; Pengyun LI ; Zhihong LIN
Chinese Traditional and Herbal Drugs 1994;0(12):-
Objective To study on FBD (composed with Poria cocos, Atractylodes macrocephala, and Angelica sinensis) used to improve learning and memory function of animals. Methods The mice were treated by ig FBD with the doses of 35, 70 and 140 mg/kg for one week continuously. Effect of FBD on dysmnesia of acquired learning of mice induced by scopolamine, dysmnesia of memory retention of mice induced by NaNO2, and dysmnesia of reappearance of memory of mice induced by 45% ethanol were studied. Improvement for the dysmnesia of memory due to chronic blood deficiency in brain of rats induced by ligating the carotid arteries of two sides were observed. Results FBD can improve the dysmnesia of mice induced by scopolamine, NaNO2, and 45% ethanol significantly, also dysmnesia due to chronic blood deficiency in brain of rats induced by ligating the carotid arteries. Conclusion FBD has the function to improve the learning and memory function of animals.
6.Effect of Huangshao Yinxue Granula on psoriasis-like animal models of animals
Kefeng RUAN ; Fenghua GU ; Qiong XIAO ; Wenxin DONG
Chinese Traditional Patent Medicine 1992;0(10):-
AIM:To study whether or not Huangshao Yinxue Granula(HYG) has the therapeutic effect on experimental psoriasis. METHODS: The mice were treated with HYG 3.125,6.25,12.5,and 25 g/kg(i.g.) for 1 or 2 weeks.We studied the effects of HYG on mitosis in mice vagina epithelium,the formation of granular layer in scale epidermis of mice tails,the changes in CD3, CD4 and CD8 factors of the serum in psoriasis-like mice and guinea-pigs. RESULTS: HYG could inhibit the mitosis in mice vagina epithelium,promote the formation of granular layer in scale epidermis of mice tails.It could also diminish the value of serum CD4/CD8 of mice to regulate abnormal immune reaction.HYG had evident therapeutic effect on the ear skin damaged with 5% propanolol in psoriasis-like guinea-pigs. CONCLUSION: HYG has therapeutic effect on psoriasis-like animal models.
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