scholarly journals Increased temperatures reduce the vectorial capacity of Aedes mosquitoes for Zika virus

2019 ◽  
Author(s):  
Onyango Maria Gorreti ◽  
Bialosuknia Sean ◽  
Payne Ann ◽  
Mathias Nicholas ◽  
Kuo Lilli ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Vector Competence ◽  
Blood Feeding ◽  
Transmission Efficiency ◽  
Vectorial Capacity ◽  
Future Climate Change ◽  
Feeding Rates ◽  
Chi Square ◽  
Transmission Potential

AbstractRapid and significant range expansion of both ZIKV and its Aedes host species has resulted in ZIKV being declared a global health threat. Mean temperatures are projected to increase globally, likely resulting in alterations of the transmission potential of mosquito-borne pathogens. The relationship between temperature and ZIKV transmission has not been well characterised for Aedes aegypti and Aedes albopictus.To understand the effect of diurnal temperature range on the vectorial capacity of Aedes aegypti and Aedes albopictus for ZIKV, factors contributing to transmission potential were measured at different temperature regimens. Their longevity and blood feeding rates were assessed, and vector competence was determined following feeding on blood meals with 8.3 log10 PFU/ml ZIKV.Higher temperature resulted in decreased longevity of Ae. aegypti [Log-rank (Mantel-Cox) Test, Chi-square, df 35.66, 5 P (<0.0001)] and a significant decrease in blood feeding rates across groups [Z score (−5.8478) P (0.0444)]. Temperature had a population and species-specific impact on ZIKV infection rates. Overall, Ae. albopictus reared at the lowest temperature regimen demonstrated the highest vectorial capacity (1.63) and the highest transmission efficiency (57%). Temperature increases decreased vectorial capacity across groups, yet the largest decreases were measured for Ae. aegypti.The results of this study suggest that future climate change could significantly impact vector competence, blood feeding behavior and longevity, and therefore decrease the overall vectorial capacity of Aedes mosquitoes. It is also clear that this impact is likely to be both species and population-specific.

scholarly journals A Literature Review of Host Feeding Patterns of Invasive Aedes Mosquitoes in Europe

Insects ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 848
Author(s):  
Sonia Cebrián-Camisón ◽  
Josué Martínez-de la Puente ◽  
Jordi Figuerola
Keyword(s):  
Vector Competence ◽  
Mosquito Species ◽  
Blood Feeding ◽  
Vectorial Capacity ◽  
Future Research ◽  
Host Feeding ◽  
Limited Information ◽  
Feeding Rates ◽  
Feeding Patterns ◽  
Distribution Ranges

Aedes invasive mosquitoes (AIMs) play a key role as vectors of several pathogens of public health relevance. Four species have been established in Europe, including Aedes aegypti, Aedesalbopictus, Aedes japonicus and Aedes koreicus. In addition, Aedes atropalpus has been repeatedly recorded although it has not yet been established. In spite of their importance in the transmission of endemic (e.g., heartworms) and imported pathogens (e.g., dengue virus), basic information of parameters affecting their vectorial capacity is poorly investigated. The aim of this study is to review the blood feeding patterns of these invasive mosquito species in Europe, summarizing available information from their native and introduced distribution ranges. The feeding patterns of mosquitoes constitute a key parameter affecting the contact rates between infected and susceptible hosts, thus playing a central role in the epidemiology of mosquito-borne pathogens. Our results highlight that these mosquito species feed on the blood of different vertebrate groups from ectotherms to birds and mammals. However, humans represent the most important source of blood for these species, accounting for 36% and 93% of hosts identified for Ae. japonicus and Ae. aegypti, respectively. In spite of that, limited information has been obtained for some particular species, such as Ae. koreicus, or it is restricted to a few particular areas. Given the high vector competence of the four AIM species for the transmission of different emerging arboviruses such as dengue, Chikungunya, Zika or Yellow fever viruses and their high feeding rates on humans, these AIM species may have an important impact on the vectorial capacity for such pathogens on urban and periurban areas. Finally, we propose directions for future research lines based on identified knowledge gaps.

scholarly journals Permethrin Resistance in Aedes aegypti Affects Aspects of Vectorial Capacity

Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 71
Author(s):  
Tse-Yu Chen ◽  
Chelsea T. Smartt ◽  
Dongyoung Shin
Keyword(s):  
Aedes Aegypti ◽  
Sodium Channel ◽  
Mosquito Control ◽  
Vector Competence ◽  
Vectorial Capacity ◽  
Parental Population ◽  
Control Programs ◽  
Channel Gene ◽  
Sodium Channel Gene ◽  
Specific Pcr

Aedes aegypti, as one of the vectors transmitting several arboviruses, is the main target in mosquito control programs. Permethrin is used to control mosquitoes and Aedes aegypti get exposed due to its overuse and are now resistant. The increasing percentage of permethrin resistant Aedes aegypti has become an important issue around the world and the potential influence on vectorial capacity needs to be studied. Here we selected a permethrin resistant (p-s) Aedes aegypti population from a wild Florida population and confirmed the resistance ratio to its parental population. We used allele-specific PCR genotyping of the V1016I and F1534C sites in the sodium channel gene to map mutations responsible for the resistance. Two important factors, survival rate and vector competence, that impact vectorial capacity were checked. Results indicated the p-s population had 20 times more resistance to permethrin based on LD50 compared to the parental population. In the genotyping study, the p-s population had more homozygous mutations in both mutant sites of the sodium channel gene. The p-s adults survived longer and had a higher dissemination rate for dengue virus than the parental population. These results suggest that highly permethrin resistant Aedes aegypti populations might affect the vectorial capacity, moreover, resistance increased the survival time and vector competence, which should be of concern in areas where permethrin is applied.

scholarly journals Risk of dengue in Central Africa: Vector competence studies with Aedes aegypti and Aedes albopictus (Diptera: Culicidae) populations and dengue 2 virus

2019 ◽  
Vol 13 (12) ◽  
pp. e0007985 ◽  
Author(s):  
Basile Kamgang ◽  
Marie Vazeille ◽  
Armel N. Tedjou ◽  
Theodel A. Wilson-Bahun ◽  
Aurélie P. Yougang ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Vector Competence ◽  
Central Africa

scholarly journals Vector competence of Aedes aegypti, Aedes albopictus, and Culex quinquefasciatus mosquitoes for Mayaro virus

2020 ◽  
Vol 14 (4) ◽  
pp. e0007518 ◽  
Author(s):  
Thiago Nunes Pereira ◽  
Fabiano Duarte Carvalho ◽  
Silvana Faria De Mendonça ◽  
Marcele Neves Rocha ◽  
Luciano Andrade Moreira
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Culex Quinquefasciatus ◽  
Vector Competence ◽  
Mayaro Virus

scholarly journals Vector competence of Aedes albopictus and Aedes aegypti (Diptera: Culicidae) for DEN2-43 and New Guinea C virus strains of dengue 2 virus

Acta Tropica ◽  
2013 ◽  
Vol 128 (3) ◽  
pp. 566-570 ◽  
Author(s):  
Xiao-Xia Guo ◽  
Xiao-Juan Zhu ◽  
Chun-Xiao Li ◽  
Yan-De Dong ◽  
Ying-Mei Zhang ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Vector Competence ◽  
New Guinea ◽  
Virus Strains

scholarly journals Hubungan Tempat Perindukan dengan Kepadatan Larva Aedes aegypti sebagai Vektor Penyakit Demam Berdarah Dengue di Wilayah Kerja Puskesmas Kalumata Kota Ternate (Relationship of the Breeding Place with the Density of Aedes aegypti Larva as a Dengue Haemorhagic Fever Disease Vector in the Working Area of Kalumata Puskesmas Ternate City)

2019 ◽  
Vol 9 (2) ◽  
pp. 62
Author(s):  
Sitti Washliyah ◽  
Dantje Tarore ◽  
Christina Salaki
Keyword(s):  
Aedes Aegypti ◽  
Aedes Albopictus ◽  
Larval Density ◽  
Chi Square ◽  
Cross Sectional ◽  
Breeding Sites ◽  
Disease Vector ◽  
Relationship Of ◽  
Used Goods ◽  
Breeding Place

Hubungan Tempat Perindukan dengan Kepadatan Larva Aedes aegypti sebagai Vektor Penyakit Demam Berdarah Dengue di Wilayah Kerja Puskesmas Kalumata Kota Ternate (Relationship of the Breeding Place with the Density of Aedes aegypti Larva as a Dengue Haemorhagic Fever Disease Vector in the Working Area of Kalumata Puskesmas Ternate City) Sitti Washliyah¹*), Dantje Tarore1), Christina Salaki1**)¹)Program Studi Entomologi Pascasarjana Universitas Sam Ratulangi Manado, 95115*Email:[email protected]**Email korespondensi: [email protected] Diterima 2 Juli 2019, diterima untuk dipublikasi 5 Agustus 2019 Abstrak Demam berdarah dengue merupakan salah satu penyakit yang disebabkan oleh nyamuk Aedes aegypti dan Aedes albopictus sebagai vektor primer. Pengendalian tempat perindukan nyamuk Ae. aegypti lebih banyak dititikberatkan pada penutupan dan abatisasi bak mandi serta penguburan barang-barang bekas di sekitar rumah penduduk yang berpeluang sebagai penampung air hujan, sementara penampung air lainnya belum mendapat perhatian yang lebih memadai, padahal peluang untuk dijadikan sebagai habitat Ae. aegypti cukup besar. Tujuan penelitian ini yaitu untuk menganalisis hubungan tempat perindukan dengan kepadatan larva dan membandingkan kepadatan populasi larva pada setiap tempat perindukan nyamuk Ae. aegypti. Jenis penelitian kuantitatif dengan pendekatan cross sectional dan analisa uji chi square yang dilaksanakan di wilayah kerja Puskesmas Kalumata Kota Ternate. Hasil penelitian menunjukan bahwa ada hubungan antara tempat perindukan nyamuk dengan kepadatan larva berdasarkan karakteristik jenis, warna, bahan, letak dan kondisi. Kesimpulannya yaitu terdapat hubungan antara tempat perindukan dengan kepadatan larva Ae.aegypti sebagai vektor penyakit demam berdarah dengue.Kata kunci: Identifikasi, tempat penampungan air, survey jentik.  AbstractDengue hemorrhagic fever is a disease caused by mosquitoes species Aedes aegypti and Aedes albopictus as primary vectors. Control of breeding sites for Ae mosquitoes. aegypti is more focused on the closure and abatement of bathtubs and the burial of used goods around people's homes that have the opportunity to collect rainwater, while other water reservoirs have not received more adequate attention, even though the opportunity to be used as Ae habitat. aegypti is quite large. The purpose of this study was to determine the relationship between breeding sites with larval density and compare larval population densities at each breeding site of the Ae mosquito. aegypti. Type of quantitative research method with cross sectional approach and analysis of chi square test conducted in the working area of Kalumata Health Center, Ternate City. The results showed that there was a relationship between mosquito breeding sites and larval density based on the characteristics of the species, color, material, location and condition. The conclusion is that there is a relationship between breeding sites and the density of Ae.aegypti larvae as a vector of dengue hemorrhagic fever.Keywords: Identification, water reservoir, larva survey.

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