1.Effect of Qingxin Jieyu Granules on Artery Thrombosis and Akt/NF-κB Signaling Pathway in EA.hy926 Cells Exposed to TNF-α
Chenchen HE ; Chenyi WEI ; Zhenghao LYU ; Qiaoyan CAI ; Zhuye GAO ; Ling ZHANG ; Jianfeng CHU
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(3):89-97
ObjectiveTo observe the effects of Qingxin Jieyu granules (QXJYG) on FeCl3-induced carotid artery thrombosis in rats and on the expression of thrombosis-related proteins tissue factor (TF) and tissue factor pathway inhibitor (TFPI) as well as the protein kinase B (Akt)/nuclear factor-κB (NF-κB) signaling pathway in EA.hy926 cells exposed to tumor necrosis factor-α (TNF-α), thus preliminarily exploring the mechanism of QXJYG in inhibiting thrombosis. MethodsThirty-six SD rats were randomized into normal control, model, positive control (aspirin, 9 mg·kg-1), and low-, medium-, and high-dose (0.99, 1.98, 3.96 g·kg-1, respectively) QXJYG groups (n=6). The rats in the drug treatment groups were administrated with corresponding drugs, and those in the normal control group and model group were given an equal volume of distilled water. After 14 consecutive days of prophylactic gavage, the rat model of common carotid artery thrombosis was established with 45% FeCl3 solution, and the blood vessels were collected and the wet weight of thrombus was weighed by an electronic balance (precision of 1/10 000). The thrombosis in the common carotid artery of each group of rats was observed by hematoxylin-eosin staining. The plasma levels of von Willebrand factor (vWF), platelet endothelial cell adhesion molecule-1 (PECAM-1), tissue-type plasminogen activator (t-PA), and plasminogen activator inhibitor-1 (PAI-1) were determined by enzyme-linked immunosorbent assay. An endothelial cell injury model was established by treating EA.hy926 human umbilical vein endothelial cells with TNF-α. The cell counting kit-8 method was used to screen the intervention concentrations of QXJYG. Western blot was employed to determine the protein levels of TF, TFPI, Akt, p-Akt, NF-κB p65, and p-NF-κB p65 in each group of cells. ResultsThe animal experiment showed that compared with the normal control group, the model group showed an increase in carotid artery thrombus weight (P<0.05), with unclear vascular structure and extensive thrombosis in the lumen. In addition, the plasma levels of vWF, PECAM-1, and PAI-1 were elevated, while the t-PA level became lowered (P<0.05) in the model group. Compared with the model group, the aspirin and QXJYG groups showed reductions in the weight of FeCl3-induced carotid artery thrombi (P<0.05) and thrombosis in the lumen, declines in plasma levels of PECAM-1 and PAI-1, and an elevation in the t-PA level (P<0.05). Moreover, the QXJYG groups showed reductions in the plasma level of vWF (P<0.05), which, however, had no significant difference between the aspirin group and the model group. The cell experiments indicated that 31.25, 62.5, 125, 250, 500 mg·L-1 QXJYG had no effect on the viability of EA.hy926 cells. Therefore, 250, 500 mg·L-1 QXJYG were selected as the intervention concentrations for subsequent experiments. Western blotting results showed that compared with the control group, the TNF-α stimulation downregulated the expression of TFPI (P<0.05), upregulated the expression of TF, and increased the ratios of p-Akt/Akt and p-NF-κB p65/NF-κB p65 (P<0.05) in EA.hy926 cells. Compared with the model group, the intervention with QXJYG upregulated the expression of TFPI (P<0.05), inhibited the expression of TF, and decreased the ratios of p-Akt/Akt and p-NF-κB p65/NF-κB p65 (P<0.05). ConclusionQXJYG has the effect of inhibiting thrombosis and regulating the expression of TF and TFPI in endothelial cells exposed to TNF-α by suppressing the abnormal activation of the Akt/NF-κB signaling pathway.
2.Evaluation of the performance of the artificial intelligence - enabled snail identification system for recognition of Oncomelania hupensis robertsoni and Tricula
Jihua ZHOU ; Shaowen BAI ; Liang SHI ; Jianfeng ZHANG ; Chunhong DU ; Jing SONG ; Zongya ZHANG ; Jiaqi YAN ; Andong WU ; Yi DONG ; Kun YANG
Chinese Journal of Schistosomiasis Control 2025;37(1):55-60
Objective To evaluate the performance of the artificial intelligence (AI)-enabled snail identification system for recognition of Oncomelania hupensis robertsoni and Tricula in schistosomiasis-endemic areas of Yunnan Province. Methods Fifty O. hupensis robertsoni and 50 Tricula samples were collected from Yongbei Township, Yongsheng County, Lijiang City, a schistosomiasis-endemic area in Yunnan Province in May 2024. A total of 100 snail sample images were captured with smartphones, including front-view images of 25 O. hupensis robertsoni and 25 Tricula samples (upward shell opening) and back-view images of 25 O. hupensis robertsoni and 25 Tricula samples (downward shell opening). Snail samples were identified as O. hupensis robertsoni or Tricula by schistosomiasis control experts with a deputy senior professional title and above according to image quality and morphological characteristics. A standard dataset for snail image classification was created, and served as a gold standard for recognition of snail samples. A total of 100 snail sample images were recognized with the AI-enabled intelligent snail identification system based on a WeChat mini program in smartphones. Schistosomiasis control professionals were randomly sampled from stations of schistosomisis prevention and control and centers for disease control and prevention in 18 schistosomiasis-endemic counties (districts, cities) of Yunnan Province, for artificial identification of 100 snail sample images. All professionals are assigned to two groups according the median years of snail survey experiences, and the effect of years of snail survey experiences on O. hupensis robertsoni sample image recognition was evaluated. A receiver operating characteristic (ROC) curve was plotted, and the sensitivity, specificity, accuracy, Youden’s index and the area under the curve (AUC) of the AI-enabled intelligent snail identification system and artificial identification were calculated for recognition of snail sample images. The snail sample image recognition results of AI-enabled intelligent snail identification system and artificial identification were compared with the gold standard, and the internal consistency of artificial identification results was evaluated with the Cronbach’s coefficient alpha. Results A total of 54 schistosomiasis control professionals were sampled for artificial identification of snail sample image recognition, with a response rate of 100% (54/54), and the accuracy, sensitivity, specificity, Youden’s index, and AUC of artificial identification were 90%, 86%, 94%, 0.80 and 0.90 for recognition of snail sample images, respectively. The overall Cronbach’s coefficient alpha of artificial identification was 0.768 for recognition of snail sample images, and the Cronbach’s coefficient alpha was 0.916 for recognition of O. hupensis robertsoni snail sample images and 0.925 for recognition of Tricula snail sample images. The overall accuracy of artificial identification was 90% for recognition of snail sample images, and there was no significant difference in the accuracy of artificial identification for recognition of O. hupensis robertsoni (86%) and Tricula snail sample images (94%) (χ2 = 1.778, P > 0.05). There was no significant difference in the accuracy of artificial identification for recognition of snail sample images with upward (88%) and downward shell openings (92%) (χ2 = 0.444, P > 0.05), and there was a significant difference in the accuracy of artificial identification for recognition of snail sample images between schistosomiasis control professionals with snail survey experiences of 6 years and less (75%) and more than 6 years (90%) (χ2 = 7.792, P < 0.05). The accuracy, sensitivity, specificity and AUC of the AI-enabled intelligent snail identification system were 88%, 100%, 76% and 0.88 for recognition of O. hupensis robertsoni snail sample images, and there was no significant difference in the accuracy of recognition of O. hupensis robertsoni snail sample images between the AI-enabled intelligent snail identification system and artificial identification (χ2 = 0.204, P > 0.05). In addition, there was no significant difference in the accuracy of artificial identification for recognition of snail sample images with upward (90%) and downward shell openings (86%) (χ2 = 0.379, P > 0.05), and there was a significant difference in the accuracy of artificial identification for recognition of snail sample images between schistosomiasis control professionals with snail survey experiences of 6 years and less and more than 6 years (χ2 = 5.604, Padjusted < 0.025). Conclusions The accuracy of recognition of snail sample images is comparable between the AI-enabled intelligent snail identification system and artificial identification by schistosomiasis control professionals, and the AI-enabled intelligent snail identification system is feasible for recognition of O. hupensis robertsoni and Tricula in Yunnan Province.
3.Comparision of aripiprazole and risperidone in improving psychiatric symptoms among chronic schizophrenia patients
Jianfeng WANG ; Bangwen LIU ; Yanyan ZHANG ; Yanping XUE ; Liang GUO ; Yanhai WU
Sichuan Mental Health 2025;38(2):108-114
BackgroundAtypical antipsychotics have been widely used in patients with chronic schizophrenia, and aripiprazole and risperidone are the most commonly used drugs. The mechanism of action of the two is different, while previous studies have provided insufficient credible evidence from multiple perspectives to support the comparative efficacy of the two drugs in improving symptoms in patients with chronic schizophrenia. ObjectiveTo compare the efficacy of aripiprazole and risperidone on the improvement of symptoms, prepulse inhibition (PPI), cognitive functioning and neurotrophic factors in patients with chronic schizophrenia, so as to provide effective treatment regimens for these patients. MethodsA total of 86 patients with chronic schizophrenia attending the psychiatry department of the Third People's Hospital of Fuyang from March 2021 to March 2023 and fulfilling the diagnostic criteria of International Classification of Diseases, tenth edition (ICD-10) were enrolled and grouped using random number table method, each with 43 cases. Aripiprazole group was given oral aripiprazole once daily at an initial dose of 5 mg for one week and then gradually increased to a maximum dose of 25 mg. Risperidone group received oral risperidone twice daily at an initial dose of 0.5 mg for one week and then gradually increased to a maximum dose of 3 mg. Treatment in both groups lasted 3 months. Before treatment and 3 months after treatment, Patients were required to complete Positive and Negative Symptom Scale (PANSS), detection of both strong and weak PPIs in a startle modification passive attention paradigm, Wisconsin Card Sorting Test (WCST) and the measurement of neurotrophic factors at baseline and after treatment. The adverse reactions were recorded. Analysis of covariance was used to test the difference between the PANSS score, PPI, WCST and neurotrophic factor levels of the groups, with the pretest used as the covariate. Results3 months after treatment, no statistical difference was found in the scores of PANSS general psychopathology subscale, positive symptom subscale, negative symptom subscale and total score between two groups after treatment (F=0.621, 0.815, 0.743, 0.752, P>0.05). There were no statistically significant differences between the two groups in PPI inhibition rate, single intense stimulus amplitude, single intense stimulus latency, prepulse inhibition amplitude, or prepulse inhibition latency (F=0.174, 0.001, 0.183, 0.171, 0.001, P>0.05). There was no statistically significant difference in the total number of WCST tests between two groups (F=0.512, P>0.05), whereas aripiprazole group reported significantly larger total numbers of categories completed and correct responses as well as smaller total numbers of random errors and perseverative errors compared to risperidone group (F=3.737, 4.621, 4.892, 5.130, P<0.05). A significant increase in brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) along with a reduction in glial fibrillary acidic protein (GFAP) were documented in risperidone group when compared to risperidone group (F=4.414, 3.781, 6.319, P<0.05). No significant difference was demonstrated in the incidence of adverse reactions between the two groups (χ2=0.261, P>0.05). ConclusionAripiprazole may be more beneficial than risperidone in improving cognitive functioning and neurotrophic factor levels in patients with chronic schizophrenia. [Funded by Scientific Research Project of Fuyang Municipal Health Commission in 2021 (number, FY2021-147)]
4.Association between moderate-to-vigorous physical activity and weightadjusted waist index with psychological sub health among middle school students
Chinese Journal of School Health 2025;46(6):837-841
Objective:
To examine the association between moderate-to-vigorous physical activity (MVPA) and weight adjusted waist index (WWI) with psychological sub health in middle school students,so as to provide a basis for mental health intervention and promotion.
Methods:
From September to November 2023, a stratified cluster random sampling method was used to survey 47 372 middle school students aged 12-17 in Jiangsu, Xinjiang, Guangdong, Jilin and Henan provinces from eastern, western, southern, northern and central of China. MVPA, WWI, and psychological subhealth were assessed, with WWI categorized into quartiles ( Q 1- Q 4). Data were analyzed using χ 2 test, Logistic regression analysis and Logistic regression analysis of generalized linear models.
Results:
The overall prevalence of psychological sub health among middle school students was 21.0%, with higher rates in boys(21.4%) than girls(20.5%) ( χ 2=6.49, P <0.05). The detection rates of emotional problems, behavioral problems and social adaptation difficulties in middle school students were 27.8%, 26.9% and 17.5%, respectively. The combination of MVPA and WWI groups was used as independent variables, and the covariates were adjusted to perform Logistic regression analysis of generalized linear model;while the Q 1 group with MVPA>60 min/d was used as the reference group, the Q 4 group with MVPA<30 min/d had the highest risk of psychological sub health detection( OR =1.58, 95% CI =1.38-1.81),and the detection risks of psychological sub health among middle school students in Q 1- Q 3 groups were 1.34(1.17-1.53), 1.30(1.13-1.49) and 1.42(1.24- 1.62 )( P <0.01).
Conclusions
MVPA and WWI are significantly associated with psychological sub health in middle school students. Lower MVPA and higher WWI in middle school students correlate with increased sub health risks. Interventions should aim to enhance MVPA levels and reduce WWI to improve mental well being in middle school students.
5.Effect evaluation of co-administration with bivalent human papilloma virus vaccine and hepatitis E virus vaccine
CHEN Maofang ; WU Ailan ; XU Yuechen ; JIN Xujing ; ZHOU Pinpu ; ZHANG Jing ; CHEN Xiaoqing ; JIN Feihua ; WU Jianfeng
Journal of Preventive Medicine 2025;37(7):710-713
Objective:
To evaluate the immunogenicity and safety of co-administration with bivalent human papillomavirus (HPV) vaccine and hepatitis E virus (HEV) vaccine, so as to provide reference for optimizing the vaccination schedule.
Methods:
Females aged 18 to 25 years were recruited from September to October 2021 in Hengdian College of Film & Television in Zhejiang Province and randomly divided into the HPV+HEV group, the HPV group, and the HEV group. The vaccination procedures were one dose each at 0, 1, and 6 months. Immunogenicity was evaluated by detecting the geometric mean titers (GMT) of HPV16 IgG, HPV18 IgG, and/or HEV IgG antibodies before the first vaccination and one month after the full course of immunization, and comparing the difference in seroconversion, and the GMT ratio. The non-inferiority margin was set at a seroconversion difference of ≤5%, and the lower limit of the 95%CI of the GMT ratio was >0.5. Safety was evaluated by collecting conjunctive local reactions/events and systemic reactions/events within 7 days after each dose, non-conjunctive adverse events within 30 days after each dose, and serious adverse events throughout the observation period (0 to 7 months).
Results:
A total of 240 females were included, among whom 236 completed the full vaccination program, including 79 in the HPV+HEV group, 77 in the HPV group, and 80 in the HEV group. One month after the full course of immunization, the seroconversion rates of HPV16 IgG and HPV18 IgG antibodies in both the HPV+HEV group and the HPV group were 100%, and the differences in seroconversion rates were 0 (95%CI: -3.39%-+∞). The seroconversion rates of HEV IgG antibodies in both the HPV+HEV group and the HEV group were 100%, and the difference in seroconversion rates was 0 (95%CI: -3.27%-+∞). The GMT of HPV16 IgG and HPV18 IgG antibodies in the HPV+HEV group was 393.88 and 284.86 IU/mL respectively, which was not inferior to 489.39 and 341.24 IU/mL in the HPV group, and the GMT ratios were 0.80 (95%CI: 0.66-+∞) and 0.83 (95%CI: 0.68-+∞), respectively. The GMT of HEV IgG in the HPV+HEV group was 13.55 U/mL, which was not inferior to 12.72 U/mL in the HEV group, and the GMT ratio was 1.07 (95%CI: 0.92-+∞). The incidences of pain, pruritus, and induration in the HPV+HEV group were 54.43%, 21.52% and 40.51% respectively, which were significantly higher than 10.39%, 0, and 0 in the HPV group (all P<0.05). The incidences of redness/swelling, muscle pain/general weakness in the HPV+HEV group were 2.53% and 0, respectively, which were significantly lower than 12.50% and 16.25% in the HEV group (both P<0.05).
Conclusion
The co-administration of the bivalent HPV vaccine and HEV vaccine is not inferior to individual vaccination in terms of immunogenicity and safety, and the vaccination plan can be optimized through co-administration.
6.Recurrent hypertriglyceridemic acute pancreatitis in an adult patient caused by the de novo mutation of p.K327N in the GPD1 gene: A case report
Xiaoyao LI ; Jianfeng DUAN ; Dacheng WANG ; Xiancheng CHEN ; Beiyuan ZHANG ; Wenkui YU
Journal of Clinical Hepatology 2024;40(2):361-364
Hypertriglyceridemia (HTG) is the second leading cause of acute pancreatitis in China and can be caused by primary factors, namely gene mutations, which may lead to recurrent hypertriglyceridemic acute pancreatitis (HTG-AP) and difficulties in effective control of triglyceride. This article reports an adult Chinese male patient who experienced eight attacks of HTG-AP and was found to carry a de novo heterozygous mutation, p.K327N, of the GPD1 gene, which may cause the persistent high level of triglyceride and recurrent attacks of HTG-AP.
7.Electroacupuncture intervention on the proliferation and differentiation of hippocampal neurons and oligodendrocytes in Alzheimer's disease model mice
Longyang LI ; Songjiang ZHANG ; Xianmin ZHAO ; Chunguang ZHOU ; Jianfeng GAO
Chinese Journal of Tissue Engineering Research 2024;28(7):1029-1035
BACKGROUND:The effect of electroacupuncture on the proliferation and differentiation of hippocampal oligodendrocytes in model mice with Alzheimer's disease remains poorly understood while demyelinating reaction related to oligodendrocytes is a common pathological reaction of Alzheimer's disease. OBJECTIVE:To investigate the effects and mechanism of electroacupuncture stimulation of"Baihui"(GV 20),"Fengfu"(GV 16)and bilateral"Shenshu"(BL 23)in Alzheimer's disease model mice on the proliferation and differentiation of endogenous neural stem cells to neurons and oligodendrocytes. METHODS:Forty 6-week-old SPF APP/PS1 transgenic male Alzheimer's disease model mice were randomly divided into electroacupuncture group(n=20)and Alzheimer's disease model group(n=20).Healthy male C57BL/6J mice of the same age were used as normal controls(n=20).The mice in the electroacupuncture group received electroacupuncture at"Baihui"(GV 20),"Fengfu"(GV 16)and bilateral"Shenshu"(BL 23)for 16 weeks(20 minutes/day and one day off a week).After electroacupuncture,Morris water maze was used to detect the changes of learning and memory function.Immunohistochemistry was utilized to detect hippocampal dentate gyrus β-amyloid senile plaques.The expression of BrdU/NeuN and BrdU/GALC in the hippocampal dentate gyrus was detected by immunofluorescence double labeling.Western blot assay was used to detect the expression levels of neuron specific protein Nestin and oligodendrocyte specific protein GALC in the hippocampus.mRNA and protein levels of Notch1 and Hes1 in the hippocampus were detected by real-time fluorescence quantitative PCR and western blot assay. RESULTS AND CONCLUSION:(1)Compared with the normal control group,the ability of learning and memory in the Alzheimer's disease model group decreased significantly;hippocampal dentate gyrus β-amyloid senile plaques increased significantly(P<0.01);the expression of GALC and Nestin in the hippocampus decreased significantly(P<0.01,P<0.05).(2)Compared with the Alzheimer's disease model group,the learning and memory ability of the electroacupuncture group was significantly increased;β-amyloid senile plaque in the hippocampal dentate gyrus decreased significantly(P<0.01).BrdU/NeuN double labeled positive cells in the hippocampal dentate gyrus and Nestin protein expression in the hippocampus increased significantly(P<0.01,P<0.05);GALC expression in hippocampus increased significantly(P<0.01).The mRNA and protein levels of Notch1 in the hippocampus were significantly increased(P<0.05,P<0.01).The mRNA and protein levels of Hes1 in the hippocampus decreased significantly(P<0.05).(3)These findings indicate that electroacupuncture at"Baihui"(GV 20),"Fengfu"(GV 16)and bilateral"Shenshu"(BL 23)of the Alzheimer's disease model infant mice can promote the proliferation and differentiation of endogenous neural stem cells to neurons and oligodendrocytes,which may be regulated through the Notch1/Hes1 pathway.
8.A retrospective analysis of the etiological characteristics and infection risks of patients critically ill with multidrug-resistant bacteria in rehabilitation wards
Huaping PAN ; Zhen WANG ; Xiaojiao ZHANG ; Jin GONG ; Jianfeng ZHAO ; Lizhi LIU ; Jiamei LIU ; Huiyue FENG ; Fang LV ; Hui FENG
Chinese Journal of Physical Medicine and Rehabilitation 2024;46(3):205-209
Objective:To explore the microbiological and disease distribution characteristics of multidrug-resistant bacteria in patients hospitalized in a critical care rehabilitation ward, and to analyze the risk factors leading to multidrug-resistant bacterial infections.Methods:Microbiology screening data describing 679 patients admitted to a critical care rehabilitation ward were retrospectively analyzed to divide the subjects into a multidrug-resistant group (positive for multidrug-resistant bacterial infections, n=166) and a non-multidrug-resistant group (negative for multidrug-resistant bacterial infections, n=513). The risk factors were then analyzed using logistic regression. Results:Among 369 strains of multidrug-resistant bacteria observed, 329 were gram-negative bacteria (89.2%), mainly Pseudomonas aeruginosa, Klebsiella pneumoniae and Escherichia coli. They were distributed in sputum (56.9%) and mid-epidemic urine (28.2%) specimens. Patients whose primary disease was hemorrhagic or ischemic cerebrovascular disease accounted for 40.96% and 23.49% of the multidrug-resistant bacterial infections, respectively. Logistic regression analysis showed that albumin level, dependence on mechanical ventilation, central venous cannulation, or an indwelling urinary catheter or cystostomy tube were significant independent predictors of such infections.Conclusion:The multidrug-resistant bacterial infections of patients admitted to the critically ill rehabilitation unit are mainly caused by gram-negative bacteria. Their occurrence is closely related to low albumin levels and mechanical ventilation, as well as to bearing an indwelling central venous catheter, a urinary catheter or a cystostomy catheter.
9.Phacoemulsification combined with capsular tension ring and intraocular lens implantation in the treatment of high myopia with cataract
Keqing MENG ; Wulin ZHANG ; Yanhui XU ; Wei DONG ; Jianfeng XU
International Eye Science 2024;24(3):432-435
AIM: To observe the efficacy of phacoemulsification combined with capsular tension ring and intraocular lens implantation in the treatment of high myopia with cataract.METHODS: Retrospective study. A total of 82 cases(82 eyes)of high myopia complicated with cataract who admitted to the cataract department of our hospital from December 2021 to April 2023 were selected as study objects, and they were divided into control group(n=39)and combination group(n=43)according to whether or not the capsular tension ring was used intraoperatively. Patients in the control group were treated with intraocular lens implantation alone, and those in the combination group were treated with phacoemulsification combined with capsular tension ring and intraocular lens implantation. The preoperative and postoperative best corrected visual acuity, central anterior chamber depth, trabecular ciliary process, visual quality and complications were compared.RESULTS: At 1 mo after surgery, the best corrected visual acuity(LogMAR)of both groups increased significantly(combination group: 0.64±0.28 vs 0.12±0.14; control group: 0.62±0.26 vs 0.23±0.25, both P<0.001). Central anterior chamber depth in both groups were higher than those before surgery(combination group: 2.57±0.56 vs 1.97±0.40 mm; control group: 2.22±0.45 vs 1.89±0.37 mm; both P<0.001), and the best corrected visual acuity and central anterior chamber depth of the combination group were significantly better than those of the control group(both P<0.05). The distance of trabecular ciliary process showed no statistical significance(combination group: 0.68±0.22 vs 0.74±0.20 mm; control group: 0.74±0.19 vs 0.78±0.17 mm, both P>0.05). The visual quality scores of the combination group were all higher than the control group at 1 mo after surgery [watching TV: 3.00±0.38 vs 2.22±0.46 points; reading books: 2.85±0.42 vs 2.21±0.44 points; night vision: 2.71±0.34 vs 2.37±0.41 points; fine operation: 2.82±0.38 vs 2.33±0.40 points, all P<0.001]. The incidence of complication in the combination group was significantly lower than that of the control group(33% vs 14%, P<0.05).CONCLUSION: Phacoemulsification combined with capsular tension ring and intraocular lens implantation can effectively promote the recovery of visual function, improve the structure of chamber angle, and reduce the incidence of complications in the treatment of patients with high myopia and cataract.
10.Molluscicidal effect of spraying 5% niclosamide ethanolamine salt granules with drones against Oncomelania hupensis in marshland areas
Chunli CAO ; Jianfeng ZHANG ; Yefang LI ; Xuehui SHEN ; Junyi HE ; Ziping BAO ; Suying GUO ; Kun YANG ; Jing XU ; Shizhu LI ; Xiaonong ZHOU
Chinese Journal of Schistosomiasis Control 2024;36(5):531-534
Objective To evaluate the molluscicidal effect of spraying 5% niclosamide ethanolamine salt granules with drones against of Oncomelania hupensis snails in snail habitats in marshland areas. Methods From September to October, 2022, marshlands were sampled from Dantu District, Zhenjiang City, Jiangsu Province as study areas, and assigned into four groups, of approximately 3 000 m2 per group. In Group A, environmental cleaning was performed, followed by spraying 5% niclosamide ethanolamine salt granules with knapsack sprayers at a dose of 40 g/m2, and in Group B, 5% niclosamide ethanolamine salt granules were sprayed with knapsack sprayers at a dose of 40 g/m2 without environmental cleaning, while in Group C, environmental cleaning was conducted, followed by spraying 5% niclosamide ethanolamine salt granules with drones at a dose of 40 g/m2, and in Group D, 5% niclosamide ethanolamine salt granules were sprayed with drones at a dose of 40 g/m2 without environmental cleaning. Then, the study areas in each group were equally divided into six blocks, with Block 1 for baseline surveys and blocks 2 to 6 for snail surveys 1, 3, 5, 7, 14 days following chemical treatment. The mortality of snails and the reduction of the density of living snails were calculated. Results A total of 132 frames were surveyed during the period from September to October 2022, and the occurrence of frames with living snails and means density of living snails were 61.36% (81/132) and 1.58 snails/0.1 m2, respectively. The overall mortality rates of snails were 43.02% (77/179), 38.69% (77/199), 47.78% (86/180) and 31.02% (58/187) 14 days following chemical treatment in groups A, B, C and D, respectively (χ2 = 11.646, P < 0.05), and there were differences detected in the snail mortality between group A and D, and between groups C and D (both Padjusted values < 0.05). The adjusted mortality rates of snails were 37.42%, 36.07%, 38.85% and 40.40% in groups A, B, C and D 14 days post-treatment, and the density of living snails decreased by 48.10%, 63.29%, 67.09% and 69.62% 14 days post-treatment relative to pre-treatment, respectively. Conclusions Chemical treatment with drones is feasible for O. hupensis snail control in marshland areas; however, the molluscicidal effect of spraying 5% niclosamide ethanolamine salt granules with drones is comparable to spraying chemicals manually in marshland areas regardless of environmental cleaning.


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