1.The Influence of Time Rhythm and Immune System on the Pathogenesis of Ulcerative Colitis from "Theory of Wei Qi "
Xiaosi ZHANG ; Anqi YANG ; Lei SHI ; Junxiang LI
Journal of Traditional Chinese Medicine 2025;66(3):238-243
The movement of wei qi (defensive qi) follows the circadian rhythm of "circulating on the yang during the day, and on the yin at night" and serves a defensive function to "protect the body". Guided by the theory of wei qi, it is believed that time rhythms and the immune system play significant roles in the pathogenesis of ulcerative colitis (UC). Dysfunction in wei qi circulation, particularly when "yang fails to enter yin," can lead to the onset of UC; the cyclical nature of wei qi's movement results in disease patterns characterized by "morning relief, daytime stability, evening aggravation, and nighttime worsening", which align with the rhythmic characteristics of immune responses. The defensive function of wei qi is crucial in maintaining intestinal immunity of patients with UC, and the spleen and stomach, which are the sources of wei qi, are key to sustaining intestinal mucosal immune homeostasis; additionally, obstruction in the ascending and descending movements of wei qi, internal disruption, and latent pathogen in the intestines lead to the development of UC. Based on the theory of wei qi, treatment approaches for UC are proposed, including time-based dietary adjustments and chronotherapy to harmonize human activities with natural rhythms; these approaches emphasize protecting the spleen and stomach while also considering the lungs and kidneys, balancing sanjiao, and harmonizing ying qi and wei qi, so as to improve the clinical effectiveness of UC treatment.
2.Characteristic Expression of Multiple Neurotransmitters Oscillation Imbabance in Brains of 1 028 Patients with Depression
Anqi WANG ; Xuemei QING ; Yanshu PAN ; Pingfa ZHANG ; Ying ZHANG ; Jian LI ; Cheng ZHANG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(11):278-286
ObjectiveTo analyze the characteristic expression patterns of six neurotransmitters including 5-hydroxytryptamine (5-HT), dopamine (DA), acetylcholine (ACh), norepinephrine (NE), inhibitory neurotransmitter (INH), and excitatory neurotransmitter (EXC) in the whole brain and different brain regions of depression patients by Search of Encephalo Telex (SET), providing new ideas for the study of heterogeneous etiology of depression. Methods(1) A retrospective study was conducted on supra-slow signals of EEG fluctuations in 1 028 patients with depression. The SET system was used to obtain the expression information of six neurotransmitters in the whole brain and 12 brain regions: left frontal region (F3), right frontal region (F4), left central region (C3), right central region (C4), left parietal region (P3), right parietal region (P4), left occipital region (O1), right occipital region (O2), left anterior temporal region (F7), right anterior temporal region (F8), left posterior temporal region (T5), and right posterior temporal region (T6). The expression information of each neurotransmitter was compared with the normal model, and it was found that single neurotransmitter was in one of three states: increased, decreased, or normal expression. The simultaneous expression states of six neurotransmitters in the brain space were referred to as the expression pattern of multiple neurotransmitters. (2) A MySQL database was established to analyze the actual expression patterns of different neurotransmitters in the whole brain of patients with depression. (3) Factor analysis was conducted to further analyze the characteristic rules of 78 variables of neurotransmitters in the whole brain and 12 brain regions in depression patients. Results(1) The expression of single neurotransmitters in the whole brain and different brain regions of the total depression population showed one of three expression states (increased/decreased/normal), being normal in the majority. The decreased and increased expression of 5-HT, ACh, DA, INH, EXC, and NE in the whole brain occurred in 6% and 25%, 31% and 17%, 36% and 9%, 15% and 31%, 32% and 14%, and 22% and 22%, respectively. (2) The antagonizing pairs of neurotransmitters (EXC/INH, DA/5-HT, and ACh/NE) showed significant antagonistic relationships in the whole brain and different brain regions, with a strong negative correlation between EXC and INH (P<0.01, |r| values ranging from 0.69 to 0.76), a strong negative correlation between DA and 5-HT (P<0.01, |r| values ranging from 0.83 to 0.90), and a moderate negative correlation between ACh and NE (P<0.01, with |r| values ranging from 0.56 to 0.66). Meanwhile, non-antagonizing pairs of neurotransmitters in the whole brain and different brain regions also showed correlations, with DA/NE (P<0.01, |r| values ranging from 0.38 to 0.46) and NE/EXC (P<0.01, |r| values ranging from 0.56 to 0.61) showing weak and moderate negative correlations, respectively, and DA/EXC showing a weak positive correlation (P<0.01, |r| values ranging from 0.38 to 0.47). (3) The six neurotransmitters in the 1 028 patients with depression presented a total of 170 expression patterns in the whole brain. The top 30 expression patterns were reported in this paper, with a cumulative rate of 60.60%, including patterns ① INH+/5-HT-/ACh+/DA+/NE-/EXC- (9.05%), ② INH+/5-HT-/ACh↓/DA+/NE-/EXC- (4.57%), and ③ INH+/5-HT-/ACh+/DA+/NE↓/EXC- (3.31%). That is, the proportion of depression patients with normal levels of all the six neurotransmitters was 9.05%, and the patients with at least one neurotransmitter abnormality accounted for 91.95%. (4) The factor analysis extracted 22 common factors from 78 variables in the whole brain and different brain regions. These common factors showed the absolute values of loadings ranging from 0.32 to 0.86 and the eigenvalues (F) ranging from 1.03 to 13.43, with a cumulative contribution rate of 76.82%. The characteristic expression patterns included ① AChP3↓/AChW↓/AChC3↓/AChF3↓/AChO1↓/AChT5↓/AChF7↓/NEP3↑/NEW↑/NEC3↑/NEF3↑/NEO1↑/NET5↑/NEF7↑ (F=13.43, whole brain), ② 5-HTO2↑/DAO2↓/5-HTP4↑/DAP4↓/5-HTW↑/DAW↓/5-HTC4↑/DAC4↓ (F=5.94), and ③ EXCF4↓/DAF4↓/NEF4↑/INHF4↑/5-HTF4↑/AChF4↓ (F=5.33). ConclusionThe actual 170 expression patterns of 6 neurotransmitters in the whole brain of 1 028 depression patients indicate that depression is a heterogeneous disease with individualized characteristics. The 22 characteristic expression patterns in the whole brain and 12 brain regions verify the pathogenesis hypothesis of multi-neurotransmitters oscillation imbalance in brains of depression patients. In summary, this study provides new guidance for the etiology, diagnosis, and treatment of depression and establishes a methodological foundation for the effectiveness evaluation of individualized treatment of depression by traditional Chinese medicine based on the objective biological markers.
3.Characteristic Expression of Multiple Neurotransmitters Oscillation Imbabance in Brains of 1 028 Patients with Depression
Anqi WANG ; Xuemei QING ; Yanshu PAN ; Pingfa ZHANG ; Ying ZHANG ; Jian LI ; Cheng ZHANG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(11):278-286
ObjectiveTo analyze the characteristic expression patterns of six neurotransmitters including 5-hydroxytryptamine (5-HT), dopamine (DA), acetylcholine (ACh), norepinephrine (NE), inhibitory neurotransmitter (INH), and excitatory neurotransmitter (EXC) in the whole brain and different brain regions of depression patients by Search of Encephalo Telex (SET), providing new ideas for the study of heterogeneous etiology of depression. Methods(1) A retrospective study was conducted on supra-slow signals of EEG fluctuations in 1 028 patients with depression. The SET system was used to obtain the expression information of six neurotransmitters in the whole brain and 12 brain regions: left frontal region (F3), right frontal region (F4), left central region (C3), right central region (C4), left parietal region (P3), right parietal region (P4), left occipital region (O1), right occipital region (O2), left anterior temporal region (F7), right anterior temporal region (F8), left posterior temporal region (T5), and right posterior temporal region (T6). The expression information of each neurotransmitter was compared with the normal model, and it was found that single neurotransmitter was in one of three states: increased, decreased, or normal expression. The simultaneous expression states of six neurotransmitters in the brain space were referred to as the expression pattern of multiple neurotransmitters. (2) A MySQL database was established to analyze the actual expression patterns of different neurotransmitters in the whole brain of patients with depression. (3) Factor analysis was conducted to further analyze the characteristic rules of 78 variables of neurotransmitters in the whole brain and 12 brain regions in depression patients. Results(1) The expression of single neurotransmitters in the whole brain and different brain regions of the total depression population showed one of three expression states (increased/decreased/normal), being normal in the majority. The decreased and increased expression of 5-HT, ACh, DA, INH, EXC, and NE in the whole brain occurred in 6% and 25%, 31% and 17%, 36% and 9%, 15% and 31%, 32% and 14%, and 22% and 22%, respectively. (2) The antagonizing pairs of neurotransmitters (EXC/INH, DA/5-HT, and ACh/NE) showed significant antagonistic relationships in the whole brain and different brain regions, with a strong negative correlation between EXC and INH (P<0.01, |r| values ranging from 0.69 to 0.76), a strong negative correlation between DA and 5-HT (P<0.01, |r| values ranging from 0.83 to 0.90), and a moderate negative correlation between ACh and NE (P<0.01, with |r| values ranging from 0.56 to 0.66). Meanwhile, non-antagonizing pairs of neurotransmitters in the whole brain and different brain regions also showed correlations, with DA/NE (P<0.01, |r| values ranging from 0.38 to 0.46) and NE/EXC (P<0.01, |r| values ranging from 0.56 to 0.61) showing weak and moderate negative correlations, respectively, and DA/EXC showing a weak positive correlation (P<0.01, |r| values ranging from 0.38 to 0.47). (3) The six neurotransmitters in the 1 028 patients with depression presented a total of 170 expression patterns in the whole brain. The top 30 expression patterns were reported in this paper, with a cumulative rate of 60.60%, including patterns ① INH+/5-HT-/ACh+/DA+/NE-/EXC- (9.05%), ② INH+/5-HT-/ACh↓/DA+/NE-/EXC- (4.57%), and ③ INH+/5-HT-/ACh+/DA+/NE↓/EXC- (3.31%). That is, the proportion of depression patients with normal levels of all the six neurotransmitters was 9.05%, and the patients with at least one neurotransmitter abnormality accounted for 91.95%. (4) The factor analysis extracted 22 common factors from 78 variables in the whole brain and different brain regions. These common factors showed the absolute values of loadings ranging from 0.32 to 0.86 and the eigenvalues (F) ranging from 1.03 to 13.43, with a cumulative contribution rate of 76.82%. The characteristic expression patterns included ① AChP3↓/AChW↓/AChC3↓/AChF3↓/AChO1↓/AChT5↓/AChF7↓/NEP3↑/NEW↑/NEC3↑/NEF3↑/NEO1↑/NET5↑/NEF7↑ (F=13.43, whole brain), ② 5-HTO2↑/DAO2↓/5-HTP4↑/DAP4↓/5-HTW↑/DAW↓/5-HTC4↑/DAC4↓ (F=5.94), and ③ EXCF4↓/DAF4↓/NEF4↑/INHF4↑/5-HTF4↑/AChF4↓ (F=5.33). ConclusionThe actual 170 expression patterns of 6 neurotransmitters in the whole brain of 1 028 depression patients indicate that depression is a heterogeneous disease with individualized characteristics. The 22 characteristic expression patterns in the whole brain and 12 brain regions verify the pathogenesis hypothesis of multi-neurotransmitters oscillation imbalance in brains of depression patients. In summary, this study provides new guidance for the etiology, diagnosis, and treatment of depression and establishes a methodological foundation for the effectiveness evaluation of individualized treatment of depression by traditional Chinese medicine based on the objective biological markers.
4.Correlation Between Human Body Fat Distribution and Carotid Atherosclerosis
Yanmeng QI ; Dandan LI ; Anqi CHEN ; Han YANG ; Yan LI
Medical Journal of Peking Union Medical College Hospital 2025;16(3):703-709
To explore the correlation between human body fat distribution and carotid athero-sclerosis. Adult healthy individuals who underwent physical examinations at the Health Management Center of the International Medical Department(Xidan Campus) of Peking Union Medical College Hospital between January 2020 and January 2023 were selected as study participants. Baseline data, laboratory indicators, Inbody body composition analysis, and carotid ultrasound examination results were collected. Participants were divided into carotid atherosclerosis group and control group based on carotid ultrasound examination results. Baseline data, laboratory indicators, and body composition differences between the two groups were compared, and multivariate Logistic regression analysis was conducted to investigate the correlation between carotid atherosclerosis and body composition. To further explore the correlation between fat distribution and carotid atherosclerosis, the ratio of trunk fat to limb fat(trunk fat/limb fat), visceral fat area, and waist-to-hip ratio were stratified into Q1, Q2, Q3, and Q4 groups(with Q1 group as the reference) based on quartiles(Q1 to Q4), and a forest plot was constructed to analyze the risk of carotid atherosclerosis in each subgroup. A total of 2221 participants were included in this study, including 1194 males(53.76%) and 1027 females(46.24%), with a mean age of(50.28±10.93) years. There were 1049 cases in the carotid atherosclerosis group and 1172 cases in the control group. Baseline data analysis showed that the carotid atherosclerosis group had a higher age and male proportion compared to the control group(both There is a significant correlation between trunk fat/limb fat and the occurrence of carotid atherosclerosis. In the future, the sample size should be expanded, and more precise methods for measuring fat distribution should be adopted to validate the conclusions of this study.
5.The research on the mechanism of GBP2 promoting the progression of silicosis by inducing macrophage polarization and epithelial cell transformation.
Maoqian CHEN ; Jing WU ; Xuan LI ; Jiawei ZHOU ; Yafeng LIU ; Jianqiang GUO ; Anqi CHENG ; Dong HU
Chinese Journal of Cellular and Molecular Immunology 2025;41(7):611-619
Objective This study aims to investigate the expression, phenotypic changes, and mechanisms of action of guanylate-binding protein 2 (GBP2) in the process of silica-induced pulmonary fibrosis. Methods The expression and localization of GBP2 in silicotic lung tissue were detected by immunohistochemical staining and immunofluorescence. An in vitro cell model was constructed, and methods such as Western blot and real-time quantitative reverse transcription polymerasechain reaction were utilized to investigate the function of GBP2 in different cell lines following silica stimulation. The mechanism of action of GBP2 in various cell lines was elucidated using Western blot analysis. Results GBP2 was highly expressed in the lung tissue of patients with silicosis. Immunohistochemical staining and immunofluorescence have revealed that GBP2 was localized in macrophages and epithelial cells. In vitro cell experiments demonstrated that silicon dioxide stimulated THP-1 cells to activate the c-Jun pathway through GBP2, promoting the secretion of inflammatory factors and facilitating the occurrence of M2 macrophage polarization. In epithelial cells, GBP2 promoted the occurrence of epithelial to mesenchymal transition (EMT) by upregulating Krueppel-like factor 8 (KLF8). Conclusion GBP2 not only activates c-Jun in macrophages to promote the production of inflammatory factors and the occurrence of M2 macrophage polarization, but also activates the transcription factor KLF8 in epithelial cells to induce EMT, collectively promoting the progression of silicosis.
Humans
;
Silicosis/genetics*
;
Macrophages/cytology*
;
Epithelial Cells/pathology*
;
GTP-Binding Proteins/physiology*
;
Epithelial-Mesenchymal Transition
;
Disease Progression
;
Cell Line
;
Male
6.Expert consensus on orthodontic treatment of protrusive facial deformities.
Jie PAN ; Yun LU ; Anqi LIU ; Xuedong WANG ; Yu WANG ; Shiqiang GONG ; Bing FANG ; Hong HE ; Yuxing BAI ; Lin WANG ; Zuolin JIN ; Weiran LI ; Lili CHEN ; Min HU ; Jinlin SONG ; Yang CAO ; Jun WANG ; Jin FANG ; Jiejun SHI ; Yuxia HOU ; Xudong WANG ; Jing MAO ; Chenchen ZHOU ; Yan LIU ; Yuehua LIU
International Journal of Oral Science 2025;17(1):5-5
Protrusive facial deformities, characterized by the forward displacement of the teeth and/or jaws beyond the normal range, affect a considerable portion of the population. The manifestations and morphological mechanisms of protrusive facial deformities are complex and diverse, requiring orthodontists to possess a high level of theoretical knowledge and practical experience in the relevant orthodontic field. To further optimize the correction of protrusive facial deformities, this consensus proposes that the morphological mechanisms and diagnosis of protrusive facial deformities should be analyzed and judged from multiple dimensions and factors to accurately formulate treatment plans. It emphasizes the use of orthodontic strategies, including jaw growth modification, tooth extraction or non-extraction for anterior teeth retraction, and maxillofacial vertical control. These strategies aim to reduce anterior teeth and lip protrusion, increase chin prominence, harmonize nasolabial and chin-lip relationships, and improve the facial profile of patients with protrusive facial deformities. For severe skeletal protrusive facial deformities, orthodontic-orthognathic combined treatment may be suggested. This consensus summarizes the theoretical knowledge and clinical experience of numerous renowned oral experts nationwide, offering reference strategies for the correction of protrusive facial deformities.
Humans
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Orthodontics, Corrective/methods*
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Consensus
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Malocclusion/therapy*
;
Patient Care Planning
;
Cephalometry
7.Single-nucleus transcriptomics decodes the link between aging and lumbar disc herniation.
Min WANG ; Zan HE ; Anqi WANG ; Shuhui SUN ; Jiaming LI ; Feifei LIU ; Chunde LI ; Chengxian YANG ; Jinghui LEI ; Yan YU ; Shuai MA ; Si WANG ; Weiqi ZHANG ; Zhengrong YU ; Guang-Hui LIU ; Jing QU
Protein & Cell 2025;16(8):667-684
Lumbar disc (LD) herniation and aging are prevalent conditions that can result in substantial morbidity. This study aimed to clarify the mechanisms connecting the LD aging and herniation, particularly focusing on cellular senescence and molecular alterations in the nucleus pulposus (NP). We performed a detailed analysis of NP samples from a diverse cohort, including individuals of varying ages and those with diagnosed LD herniation. Our methodology combined histological assessments with single-nucleus RNA sequencing to identify phenotypic and molecular changes related to NP aging and herniation. We discovered that cellular senescence and a decrease in nucleus pulposus progenitor cells (NPPCs) are central to both processes. Additionally, we found an age-related increase in NFAT1 expression that promotes NPPC senescence and contributes to both aging and herniation of LD. This research offers fresh insights into LD aging and its associated pathologies, potentially guiding the development of new therapeutic strategies to target the root causes of LD herniation and aging.
Intervertebral Disc Displacement/metabolism*
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Humans
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Aging/pathology*
;
Nucleus Pulposus/pathology*
;
Male
;
Female
;
Transcriptome
;
Middle Aged
;
Lumbar Vertebrae/pathology*
;
Adult
;
Cellular Senescence
;
Stem Cells/pathology*
;
Aged
;
Intervertebral Disc Degeneration/metabolism*
8.Trends in the distribution of Oncomelania hupensis in forestlands in Songjiang District, Shanghai Municipality from 2009 to 2023
Qi MAO ; Caiying SUN ; Anqi LI ; Weiwei LU ; Xihong LÜ ; Xuehui LU ; Yanjun JIN ; Qing YU
Chinese Journal of Schistosomiasis Control 2024;36(2):165-168
Objective To investigate the changes in distribution of Oncomelania hupensis snails in forestlands in Songjiang District, Shanghai Municipality from 2009 to 2023, so as to provide insights into formulation of O. hupensis snail surveillance programs. Methods The reports on O. hupensis snail surveillance in Songjiang District, Shanghai Municipality from 2009 to 2023 were collected, and the snail surveillance data in forestlands were extracted. The trends in the proportion of areas with snails in forestlands in total areas with snails, occurrence of frames with living snails and density of living snails were evaluated using a Joinpoint regression model in Songjiang District from 2009 to 2023, and the annual percent change (APC) and average annual percent change (AAPC). Results A total of 40 sites with snails were found in forestlands in 14 administrative villages of 4 townships, Songjiang District, Shanghai Municipality from 2009 to 2023. A total of 39 065 frames were surveyed for snails in settings covering an area of 609 600 m2, and there were 6 084 frames with snails, covering 151 250 m2 snail habitats. A total of 22 210 snails were captured, with the highest density of 260.00 snails/0.1 m2, and 6 262 snails were dissected, with no Schistosoma japonicum infection identified in snails. The proportion of areas with snails in forestlands in total areas with snails appeared a tendency towards a rise in forestlands in Songjiang District, Shanghai Municipality from 2009 to 2023 (APC = AAPC = 24.9%, P > 0.05); however, there were no turning points in the trend curve, with the highest proportion seen in 2009 (53.81%), the lowest in 2011 and 2023 (both 0) and a mean proportion of 24.81%. The occurrence of frames with living snails appeared a tendency towards a rise from 2009 to 2023 (APC = AAPC = 41.5%, P > 0.05); however, there were no turning points in the trend curve, with the highest occurrence in 2009 (53.81%), the lowest in 2011 and 2013 (both 0), and the mean occurrence of 15.57%. In addition, the density of living snails appeared a tendency towards a rise from 2009 to 2023 (APC = AAPC = 55.0%, P > 0.05); however, there were no turning points in the trend curve, with the highest density in 2023 (0.96 snails/0.1 m2), the lowest in 2011 and 2013 (both 0), and a mean density of 0.57 snails/0.1 m2. Conclusions The difficulty in O. hupensis snail control and risk of imported snails appeared a tendency towards a rise in forestlands in Songjiang District, Shanghai Municipality over years from 2009 to 2023. Supervision and assessment prior to seedling transplantation and intensified surveillance post-transplantation are recommended to reduce the risk of O. hupensis snail importation and spread.
9.The application value and predictors of 18F-PSMA PET/CT on the metastatic lesions of prostate cancer with tPSA≤20 ng/mL
Anqi ZHENG ; Zhuonan WANG ; Weixuan DONG ; Yunxuan LI ; Lei LI ; Dalin HE ; Kaijie WU ; Xiaoyi DUAN
Journal of Modern Urology 2024;29(1):23-28
【Objective】 To explore the application value of 18F-PSMA PET/CT on the detection of metastatic lesions of prostate cancer with serum total prostate specific antigen (tPSA) ≤20 ng/mL and the predictive variables affecting the imaging results, and to establish a predictive nomogram for the metastasis of prostate cancer. 【Methods】 The imaging, pathological, serum and clinical data of 175 pathologically confirmed prostate cancer patients who underwent 18F-PSMA PET/CT examination during Jan.2020 and Oct.2021 were retrospectively collected.The patients were divided into metastatic group and non-metastatic group according to PET/CT imaging results, and the positive detection rate of metastatic lesions was calculated.The independent influencing factors of 18F-PSMA PET/CT in the positive detection of metastatic lesions were determined with univariate and multivariate logistic regression analyses.The predictive nomogram was established. 【Results】 Of the 175 patients, metastatic lesions were detected in 78 cases and not detected in 97 cases, with a detection rate of 44.6% (78/175).There were statistically significant differences between the metastatic group and the non-metastatic group in urinary tract symptoms, androgen deprivation treatment (ADT) at the time of PET/CT examination and the risk level of Gleason score (GS) (P<0.05).Univariate logistic regression showed that urinary tract symptoms(OR=3.64, P<0.001), GS risk (OR=3.96, P<0.001) and concurrent ADT treatment (OR=3.71, P<0.001) were associated with the positive detection rate of metastatic lesions.Multivariate Logistic regression showed that urinary tract symptoms (OR=3.19, P=0.002), GS high-risk group (OR=2.95, P=0.005) and concurrent ADT treatment (OR=3.27, P=0.001) were independent predictors of positive detection rate. 【Conclusion】 The probability of metastasis in newly diagnosed prostate cancer patients with tPSA≤20 ng/mL is high.18F-PSMA PET/CT is of high value for the early detection of metastasis.Urinary tract symptoms, GS high-risk group and concurrent ADT treatment are independent predictors of metastatic lesions.The predictive nomogram can help assist clinical optimization of imaging examination path.
10.Surveillance and trend analysis of snails in Songjiang District of Shanghai from 2007 to 2023
Qi MAO ; Caiying SUN ; Anqi LI ; Weiwei LU ; Xihong LYU ; Xuehui LU ; Yanjun JIN ; Qing YU
Shanghai Journal of Preventive Medicine 2024;36(5):444-447
ObjectiveTo analyze the monitoring results and trends of Oncomelania in Songjiang District of Shanghai from 2007 to 2023, and to provide reference for future monitoring work. MethodsThe data of snail monitoring in Songjiang District from 2007 to 2023 were collected, including the location of snail spots, the number of survey frames, the area with snails, the number of frames with snails, the total number of snails, etc. The density of living snails and the occurrence rate of living snail frames were calculated. ResultsFrom 2007 to 2023, a total of 158 snail spots were found in 22 administrative villages in 4 towns in Songjiang District, including 131 emerging snail habitats (82.91%) and 27 reemerging snail habitats (17.09%). The total snail area was 175 980 m2, the number of snail frames was 10 061, and 33 302 snails were captured. The highest density was 260/0.11 m2, and 15 662 snails were dissected. No positive snails were found. The average density of living snails was 0.60/0.11 m2 and the average occurrence rate of living snail frames was 17.99%. The snail areas in different areas were Yexie Town 126 000 m2 (71.60%), Maogang Town 26 470 m2 (15.04%), Xinbang Town 17 040 m2 (9.68%), and Shihudang Town 6 470 m2 (3.68%). The average density of living snails in different areas was 0.89/0.11 m2 in Yexie Town, 0.65/0.11 m2 in Maogang Town, 0.26/0.11 m2 in Shihudang Town and 0.24/0.11 m2 in Xinbang Town. The snail areas of different snail habitats were as follows: woodland 151 250 m2(85.95%), river 13 810 m2(7.85%), ditch 6 910 m2(3.93%), farmland 4 010 m2(2.28%). The average density of living snails in different snail habitats: ditch 1.01/0.11 m2, beach 0.86/0.11 m2, woodland 0.57/0.11 m2, river 0.40/0.11 m2. The occurrence rate of living snail frames in different regions and different snail environment types showed a downward trend and the difference was statistically significant. ConclusionAlthough the snail monitoring indicators such as snail area, average living snail density and average living snail frame occurrence rate in Songjiang District are still at its historically low level, the average living snail density and average living snail frame occurrence rate are still high compared with other regions or the national average. We should focus on the upper reaches and tributaries of the Huangpu River, especially the key areas of seedling transplantation, and strengthen monitoring and supervision to reduce the risk of snail input.

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