Effectiveness of dengue control practices in household water containers in Northeast Thailand (original) (raw)
Related papers
Factors Associated with Larval Control Practices in a Dengue Outbreak Prone Area
Journal of Environmental and Public Health, 2014
In order to reduce the risk of dengue outbreak recurrence in a dengue outbreak prone area, the members of the community need to sustain certain behavior to prevent mosquito from breeding. Our study aims to identify the factors associated with larval control practices in this particular community. A cross-sectional study involves 322 respondents living in a dengue outbreak prone area who were interviewed using a pretested questionnaire. The level of knowledge aboutAedesmosquitoes, dengue transmission, its symptoms, and personal preventive measures ranges from fair to good. The level of attitude towards preventive measures was high. However, reported level of personal larval control practices was low (33.2%). Our multiple logistic regression analysis showed that only those with a good level of attitude towards personal preventive measure and frequent attendance to health campaigns were significantly associated with the good larval control practices. We conclude that, in a dengue outbr...
Dengue fever (DF), one of the most important emerging arboviral diseases, is transmitted through the bite of container breeding mosquitoes Aedes aegypti and Aedes albopictus. A household entomological survey was conducted in Dhaka from August through October 2000 to inspect water-holding containers in indoor, outdoor, and rooftop locations for Aedes larvae. The objective of this study was to determine mosquito productivity of each container type and to identify some risk factors of households infested with Aedes larvae. Of 9,222 households inspected, 1,306 (14.2%) were positive for Aedes larvae. Of 38,777 wet containers examined, 2,272 (5.8%) were infested with Aedes larvae. Containers used to hold water, such as earthen jars, tanks, and drums were the most common containers for larval breeding. Tires in outdoor and rooftop locations of the households were also important for larval breeding. Although present in abundance, buckets were of less importance. Factors such as independent household, presence of a water storage system in the house, and fully/partly shaded outdoors were found to be significantly associated with household infestation of Aedes larvae. Identification and subsequent elimination of the most productive containers in a given area may potentially reduce mosquito density to below a level at which dengue transmission may be halted.
Journal of Health Research
Purpose The purpose of this paper is to investigate the influence of breeding containers on the production of Aedes mosquitoes after a vector-control program in households that might support dengue transmission in tourist attraction areas of Bang Kachao Riverbend, Thailand. Design/methodology/approach A cross-sectional study was conducted in an ecotourism area of Bang Kachao Riverbend, Thailand, during the period October 2016 to September 2017. A total of 832 households from five villages participated in the study. Data collection employed an interview questionnaire, larval mosquito survey and measurements of the chemical properties of the water in each container. A binary logistic regression model was used to investigate the characteristics of water containers influencing the presence or absence of Aedes immatures. Findings The study found that water containers located inside households had a highly presence of Aedes immatures (2.22 times) compared with outdoor containers. Water co...
BMC public health, 2017
A cluster-randomized controlled trial of community mobilisation for dengue prevention in Mexico and Nicaragua reported, as a secondary finding, a higher risk of dengue virus infection in households where inspectors found temephos in water containers. Data from control sites in the preceding pilot study and the Nicaragua trial arm provided six time points (2005, 2006, 2007 and 2011, 2012, 2013) to examine potentially protective effects of temephos on entomological indices under every day conditions of the national vector control programme. Three household entomological indicators for Aedes aegypti breeding were Household Index, Households with pupae, and Pupae per Person. The primary exposure indicator at the six time points was temephos identified physically during the entomological inspection. A stricter criterion for exposure at four time points included households reporting temephos application during the last 30 days and temephos found on inspection. Using generalized linear mix...
Larval survey of the dengue-endemic area in Samarinda: guide to determine risk containers
International Journal of Public Health Science (IJPHS), 2022
Dengue has been reported in Indonesia since1968; the cases tend to increase and spread every year. From 2015-2019 almost all districts in Indonesia had dengue cases. This study aimed to determine the value of the entomological index and its relationship with the treatment of various types of containers and spatial epidemiology. A larval survey was conducted to determine the presence of larvae in water containers. Logistic regression and spatial data analysis were performed to see the distribution and make a buffer area map of Aedes sp. spreading risk. The types of containers observed in this study were water tubs, drums, buckets, refrigerator containers, dispenser containers, and other categories. There were 221 containers found containing Aedes sp. larvae. Container types affected the presence of larvae with adjusted ORs of 2.779 (95% CI: 1.441-5.360) on buckets, 9.812 (95% CI: 1.249-77.051) on refrigerator holders, and 0.301 (95% CI: 0.147-0.617) on dispenser holders, while the other variables were constant. The spatial analysis found that many houses are at risk of dengue transmission within a radius of 100 m. The discovery of containers as potential breeding sites for Aedes sp. provides a chance for an increase in dengue cases in Samarinda.
Container types and water qualities affecting on number of Aedes larvae in Trang province, Thailand
Walailak Procedia, 2018
This study investigated the effects of container types, and water qualities on numbers of Aedes mosquito larvae. Mosquito larvae were collected from nine sub-districts with ten households per sub-district in Trang province in March 2017 (i.e. Nongtrut, Natoming, Khuanpring, Bangrak, Khoklo, Banpho, Namphud, Tubtheang, and Nayongtai districts). We collected mosquito larvae in water containers using fishnets (0.55 mm mesh size) and preserved the mosquito larvae in 70% ethanol in the laboratory. We grouped containers in three groups (jar and tank, dustbins and others such as areca nut preservation jars and animal food bowls). We recorded water qualities in each container (presence of vegetation and algae, water level, odour, turbidity, temperature and pH). We identified the mosquito larvae to genus level and counted the numbers. We calculated the mosquito larvae indices (House index (HI), (Breteau index (BI), and Container index (CI)). For this study, we focused only on Aedes species; other species were discarded. We observed that container types, presence of algae in water, water odour, temperature and pH did not have effects on Aedes species larval numbers. Larval numbers were higher in clear and without vegetation water than in turbid and vegetative water, respectively. In addition, 50-75% of water level in the containers was the most preferred level for the Aedes species. Among nine sub-districts, Khoklo, Banpho, and Tubthiang had the highest HI, and Tubthiang had the highest BI and CI.
2021
Background: High water demand accompanied with an unreliable piped water supply has forced urban residents to store water in containers. This situation potentially increases the number of breeding sites for mosquito vectors, such as Aedes. Method: This study aimed to test the hypothesis if piped water connection availability, tap water use, and highly stable tap water supply can help minimize the use of water storage containers as well as the presence of larvae and number of adult Aedes mosquitoes. We conducted a community-based entomological survey of 343 households from 36 neighborhoods or Rukun Tetangga in Makassar City, Indonesia. Our model based on the hypothesis was tested by piecewise structural equation modeling analysis. Results: A significant negative correlation was found between the stability of tap water supply and the number of water storage containers (−0.16, P < 0.05). Of the two categories of water storage containers, the unintentional water storage containers de...
Original Papers Identification of Essential Containers for Aedes Larval Breeding to Control
2016
Abstract: Dengue fever (DF), one of the most important emerging arboviral diseases, is transmitted through the bite of container breeding mosquitoes Aedes aegypti and Aedes albopictus. A household entomological survey was conducted in Dhaka from August through October 2000 to inspect water-holding containers in indoor, outdoor, and rooftop locations for Aedes larvae. The objective of this study was to determine mosquito productivity of each container type and to identify some risk factors of households infested with Aedes larvae. Of 9,222 households inspected, 1,306 (14.2%) were positive for Aedes larvae. Of 38,777 wet containers examined, 2,272 (5.8%) were infested with Aedes larvae. Containers used to hold water, such as earthen jars, tanks, and drums were the most common containers for larval breeding. Tires in outdoor and rooftop locations of the households were also important for larval breeding. Although present in abundance, buckets were of less importance. Factors such as i...