Vacant Lots: Productive Sites forAedes(Stegomyia)aegypti(Diptera: Culicidae) in Mérida City, México

Baak-Baak, Carlos M.; Arana-Guardia, Roger; Cigarroa-Toledo, Nohemí; Loroño-Pino, María Alba; Reyes-Solís, Guadalupe; Machaín-Williams, Carlos; Beaty, Barry J.; Eisen, Lars; García-Rejón, Julián E.

doi:10.1603/me13209

Cited by 17 publications

(17 citation statements)

References 44 publications

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“…aegypti oviposition [93] or a restricted class of non-residential sites, such as schools [94, 95]. Consideration of non-residential structures and spaces that sustain oviposition during dry seasons–such as vacant lots [96], septic tanks [97], and drains [98, 99]–is sparse. Although special surveillance of SPs is mandatory in Brazil, the absence of rigorous examination of the importance of SP infestation for dengue virus transmission limits the capacity of municipal actors to take evidence-based steps to improve their routine control activities.…”

Section: Discussionmentioning

confidence: 99%

Epidemiological characteristics and determinants of dengue transmission during epidemic and non-epidemic years in Fortaleza, Brazil: 2011-2015

MacCormack-Gelles

Neto

Sousa³

et al. 2018

PLoS Negl Trop Dis

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BackgroundAfter being eliminated during the 1950s, dengue reemerged in Brazil in the 1980s. Since then, incidence of the disease has increased, as serotypes move within and between cities. The co-circulation of multiple serotypes contributes to cycles of epidemic and interepidemic years, and a seasonal pattern of transmission is observed annually. Little is known regarding possible differences in the epidemiology of dengue under epidemic and interepidemic scenarios. This study addresses this gap and aims to assess the epidemiological characteristics and determinants of epidemic and interepidemic dengue transmission, utilizing data from the 5th largest city in Brazil (Fortaleza), at fine spatial and temporal scales.Methods/Principal findingsLongitudinal models of monthly rates of confirmed dengue cases were used to estimate the differential contribution of contextual factors to dengue transmission in Fortaleza between 2011 and 2015. Models were stratified by annual climatological schedules and periods of interepidemic and epidemic transmission, controlling for social, economic, structural, entomological, and environmental factors. Results revealed distinct seasonal patterns between interepidemic and epidemic years, with persistent transmission after June in interepidemic years. Dengue was strongly associated with violence across strata, and with poverty and irregular garbage collection during periods of low transmission, but not with other indicators of public service provision or structural deprivation. Scrapyards and sites associated with tire storage were linked to incidence differentially between seasons, with the strongest associations during transitional precipitation periods. Hierarchical clustering analysis suggests that the dengue burden concentrates in the southern periphery of the city, particularly during periods of minimal transmission.Conclusions/SignificanceOur findings have direct programmatic implications. Vector control operations must be sustained after June even in non-epidemic years. More specifically, scrapyards and sites associated with tires (strongly associated with incidence during periods of minimal transmission), require sustained entomological surveillance, particularly during interepidemic intervals and in the urban periphery. Intersectoral collaborations that address urban violence are critical for facilitating the regular activities of vector control agents.

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Section: Discussionmentioning

confidence: 99%

Epidemiological characteristics and determinants of dengue transmission during epidemic and non-epidemic years in Fortaleza, Brazil: 2011-2015

MacCormack-Gelles

Neto

Sousa³

et al. 2018

PLoS Negl Trop Dis

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“…For storm-water drains/catch basins, we used long-handled zooplankton nets (20 × 10 cm, 100-μm mesh). More detailed descriptions of the survey methodology were given by Arana-Guardia et al (2014) for storm-water drains/catch basins and Baak-Baak et al (2014) for the other urban environments.…”

Section: Methodsmentioning

confidence: 99%

“…Several studies reported on the immature or adult stage of the primary local vector mosquito, Aedes ( Stegomyia ) aegypti (L.), for dengue virus. The studies reported on containers and seasonal patterns of abundance for immatures (Lloyd et al 1992; Winch et al 1992; Manrique-Saide et al 2008, 2012, 2013; García-Rejón et al 2011a; Arana-Guardia et al 2014; Baak-Baak et al 2014) and examined different indoor environments for adults (García-Rejón et al 2008, 2011b). Additional studies have reported more broadly on the mosquito fauna of the Yucatán Peninsula (Najera-Vazquez et al 2004, Zapata-Peniche et al 2007, Ortega-Morales et al 2010, García-Rejón et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Urban Mosquito Fauna in Mérida City, México: Immatures Collected from Containers and Storm-Water Drains/Catch Basins

Baak-Baak

Arana-Guardia

Cigarroa-Toledo

et al. 2014

Southwestern Entomologist

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We examined the species composition and temporal occurrence of immature mosquitoes in containers and storm-water drains/catch basins from November 2011 to June 2013 in Mérida City, México. A wide range of urban settings were examined, including residential premises, vacant lots, parking lots, and streets or sidewalks with storm-water drains/catch basins. In total, 111,776 specimens of 15 species were recorded. The most commonly collected species were Aedes (Stegomyia) aegypti (L.) (n = 60,961) and Culex quinquefasciatus Say (45,702), which together accounted for 95.4% of the immatures collected. These species were commonly encountered during both rainy and dry seasons, whereas most other mosquito species were collected primarily during the rainy season. Other species collected were Aedes (Howardina) cozumelensis Diaz Najera, Aedes (Ochlerotatus) taeniorhynchus (Wiedemann), Aedes (Ochlerotatus) trivittatus (Coquillett), Culex coronator Dyar and Knab, Culex interrogator Dyar and Knab, Culex lactator Dyar and Knab, Culex nigripalpus Theobald, Culex salinarius Coquillett, Culex tarsalis Coquillett, Culex thriambus Dyar, Haemagogus equinus Theobald, Limatus durhamii Theobald, and Toxorhynchites rutilus (Coquillett). The greatest number of species was recorded from vacant lots (n = 11), followed by storm-water drains/catch basins (nine) and residential premises (six). Our study demonstrated that the heterogeneous urban environment in Mérida City supports a wide range of mosquito species, many of which are nuisance biters of humans and/or capable of serving as vectors of pathogens affecting humans or domestic animals. We also briefly reviewed the medical importance of the encountered mosquito species.

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“…aegypti mosquitoes in a variety of containers that collect water. 8,9 However, limited information is available about the role of uninhabited houses in Ae. aegypti productivity.…”

Section: Introductionmentioning

confidence: 99%

Role of Abandoned and Vacant Houses on Aedes aegypti Productivity

Barrera¹,

Acevedo²,

Amador³

2021

The American Journal of Tropical Medicine and Hygiene

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The control of container Aedes species by house inspections usually achieves insufficient coverage and impact because a percentage of residents are absent and some residents refuse inspections and treatments. In addition, another fraction of the buildings may be uninhabited, such as those for rent or sale, or abandoned. Although the productivity of Aedes aegypti has been investigated in abandoned lots, less is known about the importance of uninhabited buildings. We investigated Ae. aegypti pupal productivity in inhabited, vacant, and abandoned houses and its interaction with socioeconomic levels (SELs). We found pupae in containers of 386 houses (66 abandoned, 62 vacant, and 258 inhabited) in 19 neighborhoods in southern Puerto Rico from May to August 2017. Using a generalized linear model, we found a significant interaction between the status of the house (abandoned, vacant, and inhabited) and SELs (low, medium) on Ae. aegypti pupal abundance. More pupae were found in abandoned and inhabited houses of low SELs. The lowest productivity was found in vacant houses, regardless of the SEL. Most containers producing Ae. aegypti in low-SEL houses were discarded on backyards, whereas in medium SELs, most productivity came from containers in use. Septic tanks producing Ae. aegypti were found only in houses of low SELs, where most emerging mosquitoes came from inhabited houses. We did not find any pupae of Ae. aegypti on roofs. These results indicate that proper yard management could significantly reduce the production of Ae. aegypti and the risk of dengue infections in low-SEL neighborhoods.

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Vacant Lots: Productive Sites forAedes(Stegomyia)aegypti(Diptera: Culicidae) in Mérida City, México

Cited by 17 publications

References 44 publications

Epidemiological characteristics and determinants of dengue transmission during epidemic and non-epidemic years in Fortaleza, Brazil: 2011-2015

Epidemiological characteristics and determinants of dengue transmission during epidemic and non-epidemic years in Fortaleza, Brazil: 2011-2015

Urban Mosquito Fauna in Mérida City, México: Immatures Collected from Containers and Storm-Water Drains/Catch Basins

Role of Abandoned and Vacant Houses on Aedes aegypti Productivity

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