Zika virus transmission by Brazilian Aedes aegypti and Aedes albopictus is virus dose and temperature-dependentby Chouin-Carneiro et al.
Results indicate that Brazilian populations of Ae. aegypti exhibit a much higher transmission potential for ZIKV than Ae. albopictus.
This is the first report of mosquitoes infected with CHIKV in Iran. The high-throughput screening method here presented can be proposed as a novel epidemiological surveillance tool to identify circulating arboviruses and to support preparedness to an epidemic in animals and humans.
The invasive Asian bush mosquito Aedes japonicus found in the Netherlands can experimentally transmit Zika virus and Usutu virusby Abbo et al.
Given that Ae. japonicus can experimentally transmit arthropod-borne viruses (arboviruses) like ZIKV and USUV and is currently expanding its territories, we should consider this mosquito as a potential vector for arboviral diseases in Europe.
Building on the UN’s Sustainable Development Goals commitment to “leave no one behind” and the recent championing of a need for a people-centered approach to epidemic preparedness and response, the authors call for more evidence that can support policy recommendations and advocacy efforts for gender-mainstreamed arbovirus control programs in Latin America.
Low vector competence in sylvatic mosquitoes limits Zika virus to initiate an enzootic cycle in South Americaby Fernandes et al.
These results suggest that genetically determined tissue barriers, especially in the midgut, play a vital role in inhibiting ZIKV for transmission in the tested sylvatic mosquito species. Thus, an independent enzootic transmission cycle for ZIKV in South America is very unlikely.
Management of insecticide resistance in the major Aedes vectors of arboviruses: Advances and challengesby Dusfour et al.
Based on a plan developed for malaria vectors, here the authors propose some key activities to establish a global plan for insecticide resistance management in Aedes species.
Results obtained in this study suggest that the local transmission of four arboviruses - dengue (DENV), chikungunya (CHIKV), zika (ZIKV) and yellow fever (YFV) viruses - by Ae. albopictus newly introduced in Morocco is a likely scenario.
Results from this study indicate a low ZIKV transmission by Ae. aegypti and Ae. polynesiensis tested from the Pacific region. These results were unexpected and suggest the importance of other factors especially the vector density, the mosquito lifespan or the large immunologically naive fraction of the population that may have contributed to the rapid spread of the ZIKV in the Pacific region during the 2013–2017 outbreak.
The findings of this study have implications for the development of multifaceted infection control programs, including strategies for prevention and awareness, helping the population to develop an accurate perception of the threat they are facing and encouraging behavior changes.
The authors of this study found that Culex quinquefasciatus does not support ZIKV replication and Wolbachia is not involved in producing this phenotype. These mosquitoes are therefore very unlikely to play a role in transmission of ZIKV.
Insecticide resistance is mediated by multiple mechanisms in recently introduced Aedes aegypti from Madeira Island (Portugal)by Seixas et al.
This study showed the up-regulation of several detoxification genes of multiple enzyme families associated with metabolic resistance, and the presence of the two kdr mutations, with the F1534C being fixed. Another suggested mechanism probably involved in the resistance phenotype is cuticle thickening, as several cuticle genes were found overexpressed. This study reinforces the importance of alternative control strategies to suppress Ae. aegypti population and thus reduce the likelihood of arbovirus transmission in the region.
In this study, the authors select examples of (re)emerging pathogenic arboviruses and explain the reasons for their emergence and different patterns of dispersal, focusing particularly on the mosquito vectors which are important determinants of arbovirus emergence. They also attempt to identify arboviruses likely to (re)emerge in the future.