Seasonal abundance &amp; role of predominant Japanese encephalitis vectors Culex tritaeniorhynchus &amp; Cx. gelidus Theobald in Cuddalore district, Tamil Nadu

Ramesh, D; Muniaraj, M; Samuel, Philip; Thenmozhi, V.; Venkatesh, A.; Jaganathasamy, Nagaraj; Tyagi, B. K.

doi:10.4103/0971-5916.176607

Cited by 16 publications

(3 citation statements)

References 11 publications

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“…JEV was detected in Cx . gelidus collected between 1987–1988 in Sri Lanka [ 52 ], Australia [ 67 ] and several times in mosquitoes from India [ 53 , 62 , 63 , 64 , 65 , 66 , 68 , 69 , 70 ]. The role of this species as JEV vector was further confirmed by several studies describing successful virus isolation from field-caught mosquitoes in India [ 53 , 58 , 81 ], Indonesia [ 57 , 76 , 165 ], Vietnam [ 75 ], Thailand [ 71 , 77 ], Malaysia [ 19 , 59 , 72 , 73 , 74 , 78 ], Sri Lanka [ 52 ] and Australia [ 79 , 80 ].…”

Section: Resultsmentioning

confidence: 99%

“…In addition, JEV was detected over the last few decades in Cx . tritaeniorhynchus in Sri Lanka [ 52 ], India [ 39 , 53 , 62 , 63 , 64 , 65 , 66 , 68 , 69 , 99 , 100 , 101 , 121 , 122 , 126 ], Malaysia [ 29 ], Taiwan [ 116 ], Vietnam [ 106 ], South Korea [ 45 , 46 , 47 , 48 , 123 ], Taiwan [ 54 , 124 ], Japan [ 125 ] and China [ 85 , 127 , 128 ]. Simultaneously to the JEV isolation, Mitamura and colleagues also used Cx .…”

Section: Resultsmentioning

confidence: 99%

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Mosquito Vector Competence for Japanese Encephalitis Virus

Auerswald

Maquart

Chevalier

et al. 2021

Viruses

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Japanese encephalitis virus (JEV) is a zoonotic pathogen mainly found in East and Southeast Asia and transmitted by mosquitoes. The objective of this review is to summarize the knowledge on the diversity of JEV mosquito vector species. Therefore, we systematically analyzed reports of JEV found in field-caught mosquitoes as well as experimental vector competence studies. Based on the investigated publications, we classified 14 species as confirmed vectors for JEV due to their documented experimental vector competence and evidence of JEV found in wild mosquitoes. Additionally, we identified 11 mosquito species, belonging to five genera, with an experimentally confirmed vector competence for JEV but lacking evidence on their JEV transmission capacity from field-caught mosquitoes. Our study highlights the diversity of confirmed and potential JEV vector species. We also emphasize the variety in the study design of vector competence investigations. To account for the diversity of the vector species and regional circumstances, JEV vector competence should be studied in the local context, using local mosquitoes with local virus strains under local climate conditions to achieve reliable data. In addition, harmonization of the design of vector competence experiments would lead to better comparable data, informing vector and disease control measures.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mosquito Vector Competence for Japanese Encephalitis Virus

Auerswald

Maquart

Chevalier

et al. 2021

Viruses

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“…The rainy season in India is generally July to September. However, the southern coast that includes the parts of Tamil Nadu receives around half of its annual precipitation from the retreating monsoons extending the rainy season from October to December [87,88]. This means if mosquitoes have means to travel from Tamil Nadu to other parts of the country, the mosquito season which is significantly associated with rainy seasons [89][90][91] may get prolonged in those areas and can also increase the chances of spreading the diseases.…”

Section: Discussionmentioning

confidence: 99%

Genetic differentiation among Aedes aegypti populations from different eco-geographical zones of India

Sumitha¹,

Kalimuthu²,

Kumar³

et al. 2023

PLoS Negl Trop Dis

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The present study explicitly evaluated the genetic structure of Aedes aegypti Linn, the vector of dengue, chikungunya, and Zika viruses, across different geo-climatic zones of India and also elucidated the impact of ecological and topographic factors. After data quality checks and removal of samples with excess null alleles, the final analysis was performed on 589 individual samples using 10 microsatellite markers. Overall findings of this study suggested that, Ae. aegypti populations are highly diverse with moderate genetic differentiation between them. Around half of the populations (13 out of 22) formed two genetic clusters roughly associated with geographical regions. The remaining nine populations shared genetic ancestries with either one or both of the clusters. A significant relationship between genetic and geographic distance was observed, indicating isolation by distance. However, spatial autocorrelation analysis predicted the signs of long-distance admixture. Post-hoc environmental association analysis showed that 52.7% of genetic variations were explained by a combination of climatic and topographic factors, with latitude and temperature being the best predictors. This study indicated that though overall genetic differentiation among Ae. aegypti populations across India is moderate (Fst = 0.099), the differences between the populations are developing due to the factors associated with geographic locations. This study improves the understanding of the Ae. aegypti population structure in India that may assist in predicting mosquito movements across the geo-climatic zones, enabling effective control strategies and assessing the risk of disease transmission.

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Sampling Design and Mosquito Trapping for Surveillance of Arboviral Activity

Paternina

Rodas

2017

Methods in Molecular Biology

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Mosquitoes are the most important vectors for arboviral human diseases across the world. Diseases such as Dengue Fever (DF), West Nile Virus (WNV), Yellow Fever (YF), Japanese Encephalitis (JE), Venezuelan Equine Encephalitis (VEE), and St. Louis Encephalitis (SLE), among others, have a deep impact in public health. Usually mosquitoes acquire the arboviral infection when they feed on viremic animals (birds or mammals), so their infection can be detected along the year or in short periods of time (seasons). All of this depends on the frequency and seasonality of the encounters between viremic animals and vectors.With the convergence of several phenomena like the increasing traveling of human populations, globalization of economy and more recently the global warming, the introduction of nonendemic arbovirus into new areas has become the current scenario. As examples of this new social and environmental frame we can mention the outbreak of West Nile Virus in North America in the late 1990s and more recently the outbreaks of chikungunya and Zika virus in the Americas. The present chapter deals with one of the first steps in the development of research studies and diagnosis programs, the surveillance of arboviruses in their vectors, the sampling design and mosquito trapping methods. The chapter also includes some important considerations and tips to be taken into account during the mosquito fieldwork.

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Seasonal abundance & role of predominant Japanese encephalitis vectors Culex tritaeniorhynchus & Cx. gelidus Theobald in Cuddalore district, Tamil Nadu

Cited by 16 publications

References 11 publications

Mosquito Vector Competence for Japanese Encephalitis Virus

Mosquito Vector Competence for Japanese Encephalitis Virus

Genetic differentiation among Aedes aegypti populations from different eco-geographical zones of India

Sampling Design and Mosquito Trapping for Surveillance of Arboviral Activity

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