1
|
Xie X, Chen Y, Li Y, Xie H. [Prevalence of Angiostrongylus cantonensis infection in snails in Fujian Province from 2017 to 2021]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2023; 35:282-285. [PMID: 37455100 DOI: 10.16250/j.32.1374.2022197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
OBJECTIVE To investigate the prevalence of Angiostrongylus cantonensis infection in market-sold and field-captured snails in Fujian Province, so as to provide the scientific basis for the formulation of the angiostrongyliasis control measures. METHODS In each month from May to October during the period from 2017 through 2021, Pomacea snails were collected from two field fixed surveillance sites and Bellamya aeruginosa collected from one agricultural product market in Fuzhou City, while Pomacea and B. aeruginosa snails were collected from two agricultural product markets and four restaurants in Xiamen City. At least 50 Pomacea snails and 500 g B. aeruginosa were sampled each time. A. cantonensis infection was detected in Pomacea snails using lung microscopy, and in B. aeruginosa using a tissue homogenate method. RESULTS A total of 9 531 Pomacea snails were detected for A. cantonensis infection in two cities of Fuzhou and Xiamen, and the overall prevalence of A. cantonensis infection was 4.40%, with the highest prevalence in 2017 (6.82%, 116/1 701) and the lowest prevalence in 2019 (3.46%, 83/2 400). The prevalence of A. cantonensis infection was significantly higher in Pomacea snails sampled from Fuzhou City (11.23%, 326/2 903) than from Xiamen City (1.40%, 93/6 628) (χ2 = 461.48, P < 0.01). A. cantonensis larvae were detected in larval Pomacea snails in two cities of Fuzhou and Xiamen each month. The prevalence of A. cantonensis infection in Pomacea snails appeared an overall tendency towards a rise with month in Fuzhou City, with the highest prevalence in October (15.24%), and there was a significant difference among month (χ2 = 14.56, P < 0.05), while the prevalence of A. cantonensis infection in Pomacea snails was low in Pomacea snails sampled from Xiamen City each month, with the highest prevalence in June (2.64%), and there was a significant difference among month (χ2 = 23.17, P < 0.05). A total of 18 966 B. aeruginosa snails were detected for A. cantonensis infection in two cities of Fuzhou and Xiamen, and the overall prevalence of A. cantonensis infection was 0.01%. CONCLUSIONS A. cantonensis infection was identified in Pomacea and B. aeruginosa snails in Fujian Province from 2017 to 2021, and there is a potential risk of human A. cantonensis infection.
Collapse
Affiliation(s)
- X Xie
- Fujian Provincial Center for Disease Control and Prevention; Fujian Provincial Key Laboratory for Zoonoses Research, Fuzhou, Fujian 350000, China
| | - Y Chen
- Fujian Provincial Center for Disease Control and Prevention; Fujian Provincial Key Laboratory for Zoonoses Research, Fuzhou, Fujian 350000, China
| | - Y Li
- Fujian Provincial Center for Disease Control and Prevention; Fujian Provincial Key Laboratory for Zoonoses Research, Fuzhou, Fujian 350000, China
| | - H Xie
- Fujian Provincial Center for Disease Control and Prevention; Fujian Provincial Key Laboratory for Zoonoses Research, Fuzhou, Fujian 350000, China
| |
Collapse
|
2
|
Sui J, Zhang G, Lin T, Hamm NAS, Li C, Wu X, Hu K. Quantitative Evaluation of Spatial Accessibility of Various Urban Medical Services Based on Big Data of Outpatient Appointments. Int J Environ Res Public Health 2023; 20:5050. [PMID: 36981964 PMCID: PMC10048955 DOI: 10.3390/ijerph20065050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 02/17/2023] [Accepted: 03/10/2023] [Indexed: 06/18/2023]
Abstract
Equity of urban medical services affects human health and well-being in cities and is important in building 'just' cities. We carried out a quantitative analysis of the spatial accessibility of medical services considering the diverse demands of people of different ages, using outpatient appointment big data and refining the two-step floating catchment area (2SFCA) method. We used the traditional 2SFCA method to evaluate the overall spatial accessibility of medical services of 504 communities in Xiamen city, considering the total population and the supply of medical resources. Approximately half the communities had good access to medical services. The communities with high accessibility were mainly on Xiamen Island, and those with low accessibility were further from the central city. The refined 2SFCA method showed a more diverse and complex spatial distribution of accessibility to medical services. Overall, 209 communities had high accessibility to internal medicine services, 133 to surgery services, 50 to gynecology and obstetrics services, and 18 to pediatric services. The traditional method may over-evaluate or under-evaluate the accessibility of different types of medical services for most communities compared with the refined evaluation method. Our study can provide more precise information on urban medical service spatial accessibility to support just city development and design.
Collapse
Affiliation(s)
- Jinling Sui
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guoqin Zhang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Tao Lin
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Xiamen Key Laboratory of Smart Management on the Urban Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Nicholas A. S. Hamm
- School of Geographical Sciences, University of Nottingham, Ningbo 315100, China
| | - Chunlin Li
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Xian Wu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
- Xiamen Key Laboratory of Smart Management on the Urban Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Kaiqun Hu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| |
Collapse
|
3
|
Wu C, Shui W, Huang Z, Wang C, Wu Y, Wu Y, Xue C, Huang Y, Zhang Y, Zheng D. Urban heat vulnerability: A dynamic assessment using multi-source data in coastal metropolis of Southeast China. Front Public Health 2022; 10:989963. [PMID: 36339225 PMCID: PMC9632749 DOI: 10.3389/fpubh.2022.989963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 09/08/2022] [Indexed: 01/26/2023] Open
Abstract
Extreme heat caused by global climate change has become a serious threat to the sustainable development of urban areas. Scientific assessment of the impacts of extreme heat on urban areas and in-depth knowledge of the cross-scale mechanisms of heat vulnerability forming in urban systems are expected to support policymakers and stakeholders in developing effective policies to mitigate the economic, social, and health risks. Based on the perspective of the human-environment system, this study constructed a conceptual framework and index system of "exposure-susceptibility-adaptive capacity" for urban heat vulnerability (UHV) and proposed its assessment methods. Taking Xiamen City, a coastal metropolis, as an example, spatial analysis and Geodetector were used to explore the spatial and temporal changes, spatial characteristics, and patterns of UHV under multiple external disturbances from natural to anthropological factors, and to reveal the main factors influencing UHV forming and spatial differentiation. Results showed that the exposure, susceptibility, adaptive capacity, and UHV in Xiamen City had a spatial structure of "coastal-offshore-inland". On the hot day, both the exposure and UHV showed a temporal pattern of "rising and then falling, peaking at 14:00" and a spatial pattern of "monsoonal-like" movement between coast and inland. Coastal zoning with favorable socioeconomic conditions had less magnitude of changes in UHV, where the stability of the urban system was more likely to be maintained. During the hot months, the high UHV areas were mainly distributed in the inland, while coastal areas showed low UHV levels. Further, coastal UHV was mainly dominated by "heat exposure", offshore by "comprehensive factors", and inland in the northern mountainous areas by "lack of adaptive capacity". Multi-scale urban adaptive capacity was confirmed to alter spatial distribution of exposure and reshape the spatial pattern of UHV. This study promotes the application of multi-scale vulnerability framework to disaster impact assessment, enriches the scientific knowledge of the urban system vulnerability, and provides scientific references for local targeted cooling policy development and extreme heat resilience building programs.
Collapse
Affiliation(s)
- Chaowei Wu
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
- School of Public Health, Fudan University, Shanghai, China
| | - Wei Shui
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
| | - Zhigang Huang
- Fujian Meteorological Bureau, Fuzhou, China
- Fujian Meteorological Service Center, Fujian Meteorological Bureau, Fuzhou, China
| | - Chunhui Wang
- Fujian Meteorological Service Center, Fujian Meteorological Bureau, Fuzhou, China
| | - Yuehui Wu
- Taining Meteorological Bureau, Taining, China
| | - Yinpan Wu
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
| | - Chengzhi Xue
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
| | - Yunhui Huang
- College of Environment and Safety Engineering, Fuzhou University, Fuzhou, China
| | - Yiyi Zhang
- Department of Geography, McGill University, Montreal, QC, Canada
| | - Dongyang Zheng
- Fujian Zhitianqi Information Technology Co., Ltd, Fuzhou, China
| |
Collapse
|
4
|
Zhou ZL, Sha JM, Fan YX, Shuai C, Gao S. [Temporal and spatial variations of impervious surface landscape pattern and the driving factors in Xiamen City, China]. Ying Yong Sheng Tai Xue Bao 2020; 31:230-238. [PMID: 31957400 DOI: 10.13287/j.1001-9332.202001.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Xiamen is one of China's five major special economic zones and is the core city of Haixi Economic Zone, with a high level of urbanization. Monitoring and driving force analysis of impervious surfaces can increase our understanding of urbanization process and have important significance for urban landscape pattern research and urban ecological environment construction. We used the Landsat remote sensing image data from 1978 to 2018 to reveal the temporal and spatial variation characteristics of the impervious surface landscape in Xiamen in the past 40 years, using the full-restricted least squares method, landscape pattern analysis, slope gradient analysis and correlation analysis. We further analyzed its relationship with social and economic factors. The results showed that, during 1978-2018, the impervious surface of Xiamen increased by 348.96 km2, with a mean annual increase of 8.72 km2. The impervious surface dynamics reached a maximum of 9.0% in 2005-2010. More than 86.6% of the impervious surface of Xiamen was distributed within 6° of slope, with a tendency to expand to a greater slope in 2010-2018. With the increases of slope, the proportion of impervious surface decreased, the density of plaque decreased with the shape tending to be regular and continuous, the degree of fragmentation of the impervious surface increased. The increases of impervious surface in Xiamen was significantly related to the regional economic aggregate and population. In the study period, the spatial pattern of impervious surface in Xiamen significantly altered. In the future urban planning process, the extent and speed of impervious surface expansion should be coordinated to avoid ecological problems caused by excessive impervious surface to meet the need for sustainable development of Xiamen.
Collapse
Affiliation(s)
- Zheng-Long Zhou
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China.,Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
| | - Jin-Ming Sha
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China.,Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
| | - Yue-Xin Fan
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China.,Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
| | - Chen Shuai
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China.,Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
| | - Shang Gao
- School of Geographical Science, Fujian Normal University, Fuzhou 350007, China.,Cultivation Base of State Key Laboratory of Humid Subtropical Mountain Ecology, Fuzhou 350007, China
| |
Collapse
|
5
|
Zhang WH, Yu RL, Yang YJ, Hu GR, Cui JY, Yan Y, Huang HB. [Migration and Source Analysis of Heavy Metals in Vertical Soil Profiles of the Drylands of Xiamen City]. Huan Jing Ke Xue 2019; 40:3764-3773. [PMID: 31854786 DOI: 10.13227/j.hjkx.201901227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The concentrations of eight heavy metal elements (V, Cr, Co, Ni, Cu, Zn, Sr, and Pb) and the isotopic composition of Pb and Sr were determined in vertical soil profiles of the drylands of Xiamen City using ICP-MS and TIMS. The vertical distributions and leaching migration patterns of the heavy metals were also analyzed. The results showed that most of the heavy metals (except for Sr) were not enriched relative background values at most profile depths, which indicated that heavy metal content is less affected by exogenous sources. The migration coefficients of Sr were greater than 0 throughout the entire soil profile; Zn and Co were enriched in the surface soil; and Cr, Ni, and Cu were depleted throughout the profile. V and Pb were less influenced by external activities. Sr and Pb showed clear vertical migration characteristics, and the migration depth of Sr was greater than that of Pb. Factor analysis showed that the heavy metals mainly originated from natural sources, followed by agricultural activities, transportation, and other complex anthropogenic activities. Enrichment factor analysis showed that Sr was affected by exogenous sources to varying extents. The isotopic composition analysis of Pb and Sr showed that Pb was mainly derived from the parent material, whereas Sr was interpreted as deriving from both the parent material and anthropogenic activities, and tended to migrate to the subsurface soil horizons (30-70 cm).
Collapse
Affiliation(s)
- Wei-Hua Zhang
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, China.,Key Laboratory of Environmental Monitoring, Fujian Province University, Xiamen 361024, China
| | - Rui-Lian Yu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Yu-Jie Yang
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Gong-Ren Hu
- Department of Environmental Science and Engineering, Huaqiao University, Xiamen 361021, China
| | - Jian-Yong Cui
- Center of Analysis, Beijing Research Institute of Uranium Geology, Beijing 100029, China
| | - Yan Yan
- Center of Analysis, Beijing Research Institute of Uranium Geology, Beijing 100029, China
| | - Hua-Bin Huang
- Key Laboratory of Environmental Monitoring, Fujian Province University, Xiamen 361024, China
| |
Collapse
|
6
|
Huang S, Shao G, Wang L, Tang L. Spatial Distribution and Potential Sources of Five Heavy Metals and One Metalloid in the Soils of Xiamen City, China. Bull Environ Contam Toxicol 2019; 103:308-315. [PMID: 31190165 DOI: 10.1007/s00128-019-02639-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 05/25/2019] [Indexed: 06/09/2023]
Abstract
In our study, we collected 146 surface soil samples in Xiamen City and measured the concentrations of five heavy metals (Cr, Cu, Pb, Ni, and Zn) and one metalloid (As). Multivariate statistics, geostatistics and Random Forest methods were applied to identify the potential sources and spatial variation of the six elements. The results revealed that As, Cr, and Ni originated mainly from industrial activities, and higher concentrations were found in developed areas. The amounts of Cu, Pb, and Zn in soils were mainly predetermined by soil parent material and agricultural activities. Besides, the atmospheric deposition rather than industrial activities substantially influenced the accumulation of Pb in the soils near the boundary between Tong'an and Quanzhou City, because there were few industries but many forests in this area. Because of the connections of the six elements with factor values of factor analysis, appropriate and accessible covariates could be used in co-kriging to increase the accuracies of interpolation of heavy metal and metalloid concentrations relative to that in ordinary kriging.
Collapse
Affiliation(s)
- Sha Huang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Guofan Shao
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
- Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN, 47907, USA
| | - Luyan Wang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Lina Tang
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
| |
Collapse
|