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De Vasconcelos CAA, Silva SOF, Gomes B, Alencar J. EVALUATION OF THE EFFICIENCY OF BEETROOT PEEL (BETA VULGARIS) IN OVITRAPS AS AN ATTRACTANT FOR SURVEILLANCE OF ARBOVIRUS VECTORS IN THE MUNICIPALITY OF AGRESTINA, STATE OF PERNAMBUCO, BRAZIL. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2024:502363. [PMID: 39089686 DOI: 10.2987/24-7183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
It is estimated that there are over 500 species of arboviruses worldwide, with more than 150 of them directly associated with human diseases, the majority of which are zoonotic. Among the main arboviruses circulating in Brazil, dengue, Zika, and chikungunya stand out, all transmitted through a common vector, Aedes aegypti. Given this scenario, the development and implementation of more efficient surveillance strategies become urgent. This study aims to compare and evaluate the efficiency of beetroot peel, Beta vulgaris, as an attractant for Ae. aegypti oviposition under field conditions in the municipality of Agrestina, State of Pernambuco, Brazil. Beetroot peel extract is a cheap and accessible source of geosmin, which holds significant potential as an attractant for mosquitoes due to its resemblance to microbial volatiles found in water bodies rich in organic material. During the study period (November 2023 to April 2024), 40 traps were set in each neighborhood, with 20 of each attractant. Two traps were used per property, one following the traditionally used model (beer yeast infusion) and another containing beetroot peel. Overall, in both analyzed neighborhoods (Campo Novo and Cohab), beetroot peel appeared to be a more efficient attractant for the oviposition of culicids. Beetroot peel showed the highest values in egg abundance and in the analyzed indices.
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de Sousa SC, Bezerra JMT, Cardoso DT, Ker FTDO, de Araújo GR, Coelho VBN, Barbosa DS. Space-time dispersion of dengue occurrence in epidemic and non-epidemic years in a municipality in the metropolitan region of Belo Horizonte, MG, 2011 to 2017. REVISTA BRASILEIRA DE EPIDEMIOLOGIA 2024; 27:e240023. [PMID: 38896646 PMCID: PMC11182438 DOI: 10.1590/1980-549720240023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 05/12/2023] [Accepted: 02/19/2024] [Indexed: 06/21/2024] Open
Abstract
OBJECTIVE To analyze the transmission dynamics of dengue, a public health problem in Brazil and the Metropolitan Region of Belo Horizonte (MRBH). METHODS The spatiotemporal evolution of the occurrence of dengue in the municipality of Contagem, state of Minas Gerais, a region with high arbovirus transmission, was analyzed. Furthermore, epidemic and non-epidemic periods were analyzed, based on probable cases of dengue. This is an ecological study that used the Notifiable Diseases Information System (SINAN) national database. The analyses were carried out considering the period from epidemiological week (EW) 40 of 2011 to 39 of 2017. Spatial analysis tools (crude and smoothed incidence rate, directional distribution ellipse, global Moran index and local Moran index, and spatial scanning time with definition of epidemiological risk) were used. RESULTS The 2012 to 2013 and 2015 to 2016 epidemic cycles presented high incidence rates. The disease was concentrated in more urbanized areas, with a small increase in cases throughout the municipality. Seven statistically significant local clusters and areas with a high rate of cases and accentuated transmission in epidemic cycles were observed throughout the municipality. Spatial autocorrelation of the incidence rate was observed in all periods. CONCLUSION The results of the present study highlight a significant and heterogeneous increase in dengue notifications in Contagem over the years, revealing distinct spatial patterns during epidemic and non-epidemic periods. Geoprocessing analysis identified high-risk areas, a piece of knowledge that can optimize the allocation of resources in the prevention and treatment of the disease for that municipality.
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Affiliation(s)
- Selma Costa de Sousa
- Universidade Federal de Minas Gerais, Institute of Biological Sciences, Department of Parasitology, Postgraduate Program in Parasitologia – Belo Horizonte (MG), Brazil
| | - Juliana Maria Trindade Bezerra
- Universidade Federal de Minas Gerais, Institute of Biological Sciences, Department of Parasitology, Postgraduate Program in Parasitologia – Belo Horizonte (MG), Brazil
- Universidade Estadual do Maranhão, Campus de Lago da Pedra – Lago da Pedra (MA), Brazil
- Universidade Estadual do Maranhão, Postgraduate Program in Ciência Animal – São Luís (MA), Brazil
| | - Diogo Tavares Cardoso
- Universidade Federal de Minas Gerais, Institute of Biological Sciences, Department of Parasitology, Postgraduate Program in Parasitologia – Belo Horizonte (MG), Brazil
| | - Fabrício Thomaz de Oliveira Ker
- Universidade Federal de Minas Gerais, Institute of Biological Sciences, Department of Parasitology, Postgraduate Program in Parasitologia – Belo Horizonte (MG), Brazil
| | - Giovanna Rotondo de Araújo
- Universidade Federal de Minas Gerais, Institute of Biological Sciences, Department of Parasitology, Postgraduate Program in Parasitologia – Belo Horizonte (MG), Brazil
| | - Vagner Braga Nunes Coelho
- Universidade Federal de Minas Gerais, Institute of Geosciences, Department of Cartography, Postgraduate Program in Environmental Systems Analysis and Modeling – Belo Horizonte (MG), Brazil
| | - David Soeiro Barbosa
- Universidade Federal de Minas Gerais, Institute of Biological Sciences, Department of Parasitology, Postgraduate Program in Parasitologia – Belo Horizonte (MG), Brazil
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Bohm BC, Morais MHF, Cunha MDCM, Bruhn NCP, Caiaffa WT, Bruhn FRP. Determining the relationship between dengue and vulnerability in a Brazilian city: a spatial modeling analysis. Pathog Glob Health 2024; 118:120-130. [PMID: 37602571 PMCID: PMC11141313 DOI: 10.1080/20477724.2023.2247273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023] Open
Abstract
Dengue is a viral infection transmitted by the Aedes aegypti mosquito. This study aimed to assess the distribution of cases and deaths from dengue and severe dengue, and its relationship with social vulnerability in Belo Horizonte, State of Minas Gerais, Brazil, from 2010 to 2018. The incidence and lethality rates of dengue and their relationship with sex, age, education, skin color, and social vulnerability were studied using chi-square tests, Ordinary Least Squares (OLS), and Geographically Weighted Regression (GWR) analyses. The number of cases of dengue in Belo Horizonte during the study period was 324,044 dengue cases, with 1,334 cases of severe dengue and 88 deaths. During the past few decades, the incidence rate of both dengue and severe cases varied, with an average incidence rate of respectively 1515.5 and 6.2/100,000 inhabitants. The increase in dengue cases was directly related to areas with higher social vulnerability areas and more working-age people. Also, the disease is more severe in people self-declared as black, elderly, and male. The findings of this study might provide relevant information for health services in the organization of control and prevention policies for this problem, emphasizing the most vulnerable urban areas and categories.
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Affiliation(s)
- Bianca Conrad Bohm
- Veterinary Epidemiology Laboratory, Preventive Veterinary Department, Federal University of Pelotas (UFPel), Pelotas, Brazil
| | | | | | | | - Waleska Teixeira Caiaffa
- Urban Health Observatory - Faculty of Medicine, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil
| | - Fábio Raphael Pascoti Bruhn
- Preventive Veterinary Department, Zoonoses Control Center (UFPel), Federal University of Pelotas, Pelotas, Brazil
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Wright E, Carrillo MA, Matamoros D, Sanchez RC, Yañez J, Di Lorenzo G, Villa JM, Kroeger A. Applicability of the Mexican ovitrap system for Aedes vector surveillance in Colombia. Pathog Glob Health 2023; 117:554-564. [PMID: 36384430 PMCID: PMC10392324 DOI: 10.1080/20477724.2022.2146049] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Ovitraps can detect Aedes vectors at an early stage and can serve as an alarm indicator for outbreak prediction. This study aimed to summarize the available literature about the ovitrap system and to determine its feasibility, required resources and costs when installing and maintaining this vector surveillance system in the municipality of Los Patios, Colombia. A scoping review to assess the role of ovitraps as a tool for Aedes vector surveillance was conducted. The subsequent fieldwork consisted of mapping the municipality, manufacturing, and installing 40 ovitraps in 10 blocks, revising them weekly for 4 weeks by two half-time employed vector control technicians, and carrying out a cost analysis. A total of 38 studies were included in this review showing that ovitraps had a better performance than other entomological surveillance methods and a positive correlation with other entomological and disease variables. From the field results over 4 weeks, a high proportion of positive ovitraps (80%, 90%, 75%, 97.5%) and positive blocks (100%) as well as a good acceptance by house owners (76.9%), were identified. Operational indicators such as average installation time of the ovitraps (10h15 m), weekly reading and reinstallation (on average 7h27 m) and the cost of the intervention (COL$1,142,304.47/US$297) were calculated. Literature shows that ovitraps are sensitive to detect the presence of Aedes mosquitoes, providing data efficiently and timely for outbreak prediction. The field testing showed it is an affordable and feasible method in the context of a Colombian municipality and similar endemic areas.
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Affiliation(s)
- Eduardo Wright
- Centre for Medicine and Society, Master Programme Global Urban Health, Albert-Ludwigs University Freiburg, Freiburg in Breisgau, Germany
| | - Maria Angelica Carrillo
- Centre for Medicine and Society, Master Programme Global Urban Health, Albert-Ludwigs University Freiburg, Freiburg in Breisgau, Germany
| | - David Matamoros
- International Training Centre, International Master of Science in Rural Development, University of Ghent, Ghent, Belgium
| | - Rocío Cárdenas Sanchez
- Departamento de Control de Vectores, Instituto Departamental Norte de Santander, Cúcuta, Colombia
| | - Johanna Yañez
- Departamento de Control de Vectores, Instituto Departamental Norte de Santander, Cúcuta, Colombia
| | - Giusseppe Di Lorenzo
- Consultorio de Medicina General, Centro Médico Familiar Di Lorenzo, El Triunfo, Ecuador
| | - Juan Manuel Villa
- Direccion de Hospitales, Secretaria de Salud del Estado de Nuevo Leon, Monterrey, Mexico
| | - Axel Kroeger
- Centre for Medicine and Society, Master Programme Global Urban Health, Albert-Ludwigs University Freiburg, Freiburg in Breisgau, Germany
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Acero-Sandoval MA, Palacio-Cortés AM, Navarro-Silva MA. Surveillance of Aedes aegypti and Aedes albopictus (Diptera: Culicidae) as a Method for Prevention of Arbovirus Transmission in Urban and Seaport Areas of the Southern Coast of Brazil. JOURNAL OF MEDICAL ENTOMOLOGY 2023; 60:173-184. [PMID: 36305159 DOI: 10.1093/jme/tjac143] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Indexed: 06/16/2023]
Abstract
Entomological surveillance is a traditional method to measure presence, distribution, and seasonal variation of vectors in urban areas, and is essential to targeted control activities to prevent arbovirus transmission. Ovitraps as one of the main components of surveillance programs, enable determination of female oviposition behavior, as well as identification of seasonal variations of the vector. The goals of this study were 1) to detect the mosquitos (Aedes aegypti Linnaeus) and (Aedes albopictus Skuse) (Diptera:Culicidae), in Paranaguá city, 2) to assess ovitrap positive index (OPI), egg density index (EDI), and their relationship with meteorological variables, and 3) to evaluate the vertical transmission of dengue, Zika, and chikungunya in Ae. aegypti and Ae. albopictus. The study was carried out in urban areas of Paranaguá city, an important port region of Brazil, from June 2017 to November 2018. The city was divided into 16 area-clusters. Three-hundred and thirty-one ovitraps were installed monthly, remaining for four days in selected places. Kernel density maps were done to compare the spatiotemporal distribution of collected eggs. Areas which maintained constant oviposition associated with vector activity were identified and were found to overlap the area-clusters with the highest EDI. As viral RNA was not detected, vertical transmission was likely not a maintenance mechanism of arbovirus circulation in Ae. aegypti and Ae. albopictus vectors. This study reiterates the importance, efficiency, and feasibility of ovitraps to monitor the presence and dynamics of Aedes spp. populations.
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Affiliation(s)
- Mario Arturo Acero-Sandoval
- Laboratory of Morphology and Physiology of Culicidae and Chironomidae, Zoology Department, Federal University of Paraná, CP 19020, CEP 81531-980, Curitiba, Paraná, Brazil
| | - Angela Maria Palacio-Cortés
- Laboratory of Morphology and Physiology of Culicidae and Chironomidae, Zoology Department, Federal University of Paraná, CP 19020, CEP 81531-980, Curitiba, Paraná, Brazil
| | - Mario Antônio Navarro-Silva
- Laboratory of Morphology and Physiology of Culicidae and Chironomidae, Zoology Department, Federal University of Paraná, CP 19020, CEP 81531-980, Curitiba, Paraná, Brazil
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Pan YH, Liao MY, Chien YW, Ho TS, Ko HY, Yang CR, Chang SF, Yu CY, Lin SY, Shih PW, Shu PY, Chao DY, Pan CY, Chen HM, Perng GC, Ku CC, King CC. Use of seroprevalence to guide dengue vaccination plans for older adults in a dengue non-endemic country. PLoS Negl Trop Dis 2021; 15:e0009312. [PMID: 33793562 PMCID: PMC8075253 DOI: 10.1371/journal.pntd.0009312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 04/26/2021] [Accepted: 03/17/2021] [Indexed: 01/05/2023] Open
Abstract
A shift in dengue cases toward the adult population, accompanied by an increased risk of severe cases of dengue in the elderly, has created an important emerging issue in the past decade. To understand the level of past DENV infection among older adults after a large dengue outbreak occurred in southern Taiwan in 2015, we screened 1498 and 2603 serum samples from healthy residents aged ≥ 40 years in Kaohsiung City and Tainan City, respectively, to assess the seroprevalence of anti-DENV IgG in 2016. Seropositive samples were verified to exclude cross-reaction from Japanese encephalitis virus (JEV), using DENV/JEV-NS1 indirect IgG ELISA. We further identified viral serotypes and secondary DENV infections among positive samples in the two cities. The overall age-standardized seroprevalence of DENV-IgG among participants was 25.77% in Kaohsiung and 11.40% in Tainan, and the seroprevalence was significantly higher in older age groups of both cities. Although the percentages of secondary DENV infection in Kaohsiung and Tainan were very similar (43.09% and 44.76%, respectively), DENV-1 and DENV-2 spanned a wider age range in Kaohsiung, whereas DENV-2 was dominant in Tainan. As very few studies have obtained the serostatus of DENV infection in older adults and the elderly, this study highlights the need for further investigation into antibody status, as well as the safety and efficacy of dengue vaccination in these older populations.
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Affiliation(s)
- Yi-Hua Pan
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University (NTU), Taipei, Taiwan, Republic of China
| | - Mei-Ying Liao
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University (NTU), Taipei, Taiwan, Republic of China
| | - Yu-Wen Chien
- Department of Public Health, College of Medicine, National Cheng Kung University (NCKU), Tainan, Taiwan, Republic of China
| | - Tzong-Shiann Ho
- Department of Pediatrics, National Cheng-Kung University Hospital (NCKUH), College of Medicine, NCKU, Tainan, Taiwan, Republic of China
| | - Hui-Ying Ko
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University (NTU), Taipei, Taiwan, Republic of China
| | - Chin-Rur Yang
- Institute of Immunology, College of Medicine, NTU, Taipei, Taiwan, Republic of China
| | - Shu-Fen Chang
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taipei, Taiwan, Republic of China
| | - Chia-Yi Yu
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes (NHRI), Tainan, Taiwan, Republic of China
| | - Shu-Yu Lin
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University (NTU), Taipei, Taiwan, Republic of China
| | - Pin-Wei Shih
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University (NTU), Taipei, Taiwan, Republic of China
| | - Pei-Yun Shu
- Center for Diagnostics and Vaccine Development, Centers for Disease Control, Ministry of Health and Welfare, Taipei, Taiwan, Republic of China
| | - Day-Yu Chao
- Institute of Microbiology and Public Health, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan, Republic of China
| | - Chao-Ying Pan
- Department of Health, Kaohsiung City Government, Kaohsiung, Taiwan, Republic of China
| | - Hong-Ming Chen
- Public Health Bureau, Tainan City Government, Tainan, Taiwan, Republic of China
| | - Guey-Chuen Perng
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University (NCKU), Tainan, Taiwan, Republic of China
| | - Chia-Chi Ku
- Institute of Immunology, College of Medicine, NTU, Taipei, Taiwan, Republic of China
| | - Chwan-Chuen King
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University (NTU), Taipei, Taiwan, Republic of China
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