Natural vertical transmission by Stegomyia albopicta as dengue vector in Brazil

Cecílio, Alzira Batista; Campanelli, Eliane Silveira; Souza, Kátia Paulino Ribeiro de; Figueiredo, Leandra Barcelos; Resende, Marcelo Carvalho de

doi:10.1590/s1519-69842009000100015

Cited by 32 publications

(43 citation statements)

References 23 publications

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“…aegypti and Ae. albopictus larvae was detected in studies by Cecilio et al () and Pessanha et al (). According to Joshi et al (), vertical transmission in nature does not occur in more than 20% of the progeny.…”

Section: Discussionmentioning

confidence: 83%

Dengue virus detection in Aedes aegypti larvae from southeastern Brazil

Cecílio¹,

Júnior²,

Tótola

et al. 2015

Journal of Vector Ecology

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The transmission of dengue, the most important arthropod-borne viral disease in Brazil, has been intensified over the past decades, along with the accompanying expansion and adaptation of its Aedes vectors. In the present study, we mapped dengue vectors in Ouro Preto and Ouro Branco, Minas Gerais, by installing ovitraps in 32 public schools. The traps were examined monthly between September, 2011 through July, 2012 and November, 2012 to April, 2013. The larvae were reared until the fourth stadium and identified according to species. The presence of dengue virus was detected by real time PCR and agarose gel electrophoresis. A total of 1,945 eggs was collected during the 17 months of the study. The Ovitrap Positivity Index (OPI) ranged from 0 to 28.13% and the Eggs Density Index (EDI) ranged from 0 to 59.9. The predominant species was Aedes aegypti, with 84.9% of the hatched larvae. Although the collection was low when compared to other ovitraps studies, vertical transmission could be detected. Of the 54 pools, dengue virus was detected in four Ae. aegypti pools. Journal of Vector Ecology 40 (1): 71-74. 2015.

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Section: Discussionmentioning

confidence: 83%

Dengue virus detection in Aedes aegypti larvae from southeastern Brazil

Cecílio¹,

Júnior²,

Tótola

et al. 2015

Journal of Vector Ecology

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“…Ovitraps have also been recommended in the monitoring and impact assessment of vector control measures, such as insecticide application. Another important contribution of oviposition traps is the possibility of detecting dengue virus through transovarial transmission . Costa et al .…”

Section: Discussionmentioning

confidence: 99%

Relationship between local presence and density of Aedes aegypti eggs with dengue cases: a spatial analysis approach

Albuquerque

Pinto

Sadahiro

et al. 2018

Tropical Med Int Health

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Objectives To analyze the relationship between the occurrence of dengue and ovitrap positivity and dengue egg density in two Amazonas municipalities (Brazil) in 2016. Methods We performed a case‐control study using secondary data from the dengue fever surveillance system. Ovitraps distributed regularly in the urban area of two cities were used to monitor the presence of the vector. The relationship between egg positivity, egg density and the location of dengue cases was evaluated using two approaches as follows: (i) based on the result of the nearest neighbour ovitrap and (ii) based on the results of the set of ovitraps within the influence area of 300 m from the location of each case and control. Results During the study period, 229 confirmed cases of dengue fever were reported in Tabatinga and 89 cases in Itacoatiara. In this study, we found that the positivity of ovitraps was related to the occurrence of dengue in Tabatinga and Itacoatiara. An association between egg density of Ae. aegypti and dengue occurrence was also observed in Itacoatiara. The temporal lags for ovitrap positivity measurements were predominantly 15 or 30 days. A dengue association for egg density for a 15‐day time lag was detected for one of the case‐control approaches. Conclusions The location of dengue cases is related to ovitrap egg positivity, while a less evident possible association may exist for egg density. This indicates that these traps could be used to improve vector control actions.

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“…In recent decades, research has increased, some of it originating in clinical laboratory tests in which mosquitoes were infected 3,10 , and others originating in field studies which accounted for natural transmission. The latter observations come both from researchers from the Americas 8,9,14 , especially Brazil 4,6,15,16,23,24 , India 1,2 and South East Asia 5,12,17 . The four dengue virus serotypes were found with natural vertical transmission.…”

Section: Introductionmentioning

confidence: 98%