scholarly journals Two invasive mosquito species, Aedes albopictus and Aedes japonicus japonicus, trapped in south-west Germany, July to August 2011

2012 ◽  
Vol 17 (4) ◽  
Author(s):  
D Werner ◽  
M Kronefeld ◽  
F Schaffner ◽  
H Kampen
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
West Germany ◽  
Aedes Japonicus ◽  
Aedes Japonicus Japonicus ◽  
South West ◽  
Invasive Mosquito ◽  
Rhine Valley ◽  
First Time ◽  
Upper Rhine

Adult females of two invasive species, Aedes albopictus and Aedes japonicus japonicus, were collected for the first time in July and August 2011 in Germany. Previously, only immature stages of these species had been found in the country. Repeated detection of these species reveals the Upper Rhine Valley in south-west Germany to be a particularly sensitive region for the introduction and establishment of exotic mosquito species that needs careful observation.

scholarly journals Mosquitoes of North-Western Europe as Potential Vectors of Arboviruses: A Review

Viruses ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 1059 ◽  
Author(s):  
Jean-Philippe Martinet ◽  
Hubert Ferté ◽  
Anna-Bella Failloux ◽  
Francis Schaffner ◽  
Jérôme Depaquit
Keyword(s):  
Aedes Albopictus ◽  
Native Species ◽  
Western Europe ◽  
Vector Competence ◽  
Mosquito Species ◽  
Mosquito Vector ◽  
Aedes Japonicus ◽  
Imported Cases ◽  
Invasive Mosquito ◽  
North Western

Background: The intensification of trade and travel is linked to the growing number of imported cases of dengue, chikungunya or Zika viruses into continental Europe and to the expansion of invasive mosquito species such as Aedes albopictus and Aedes japonicus. Local outbreaks have already occurred in several European countries. Very little information exists on the vector competence of native mosquitoes for arboviruses. As such, the vectorial status of the nine mosquito species largely established in North-Western Europe (Aedes cinereus and Aedes geminus, Aedes cantans, Aedes punctor, Aedes rusticus, Anopheles claviger s.s., Anopheles plumbeus, Coquillettidia richiardii, Culex pipiens s.l., and Culiseta annulata) remains mostly unknown. Objectives: To review the vector competence of both invasive and native mosquito populations found in North-Western Europe (i.e., France, Belgium, Germany, United Kingdom, Ireland, The Netherlands, Luxembourg and Switzerland) for dengue, chikungunya, Zika, West Nile and Usutu viruses. Methods: A bibliographical search with research strings addressing mosquito vector competence for considered countries was performed. Results: Out of 6357 results, 119 references were related to the vector competence of mosquitoes in Western Europe. Eight species appear to be competent for at least one virus. Conclusions: Aedes albopictus is responsible for the current outbreaks. The spread of Aedes albopictus and Aedes japonicus increases the risk of the autochthonous transmission of these viruses. Although native species could contribute to their transmission, more studies are still needed to assess that risk.

scholarly journals Can data from native mosquitoes support determining invasive species habitats? Modelling the climatic niche of Aedes japonicus japonicus (Diptera, Culicidae) in Germany

2019 ◽  
Vol 119 (1) ◽  
pp. 31-42
Author(s):  
Antje Kerkow ◽  
Ralf Wieland ◽  
Linus Früh ◽  
Franz Hölker ◽  
Jonathan M. Jeschke ◽  
...  
Keyword(s):  
Invasive Species ◽  
Mosquito Species ◽  
Distribution Area ◽  
Support Vector ◽  
Aedes Japonicus ◽  
Climate Conditions ◽  
Invasive Mosquito Species ◽  
Aedes Japonicus Japonicus ◽  
Occurrence Data ◽  
Invasive Mosquito

AbstractInvasive mosquito species and the pathogens they transmit represent a serious health risk to both humans and animals. Thus, predictions on their potential geographic distribution are urgently needed. In the case of a recently invaded region, only a small number of occurrence data is typically available for analysis, and absence data are not reliable. To overcome this problem, we have tested whether it is possible to determine the climatic ecological niche of an invasive mosquito species by using both the occurrence data of other, native species and machine learning. The approach is based on a support vector machine and in this scenario applied to the Asian bush mosquito (Aedes japonicus japonicus) in Germany. Presence data for this species (recorded in the Germany since 2008) as well as for three native mosquito species were used to model the potential distribution of the invasive species. We trained the model with data collected from 2011 to 2014 and compared our predicted occurrence probabilities for 2015 with observations found in the field throughout 2015 to evaluate our approach. The prediction map showed a high degree of concordance with the field data. We applied the model to medium climate conditions at an early stage of the invasion (2011–2015), and developed an explanation for declining population densities in an area in northern Germany. In addition to the already known distribution areas, our model also indicates a possible spread to Saarland, southwestern Rhineland-Palatinate and in 2015 to southern Bavaria, where the species is now being increasingly detected. However, there is also evidence that the possible distribution area under the mean climate conditions was underestimated.

scholarly journals First Record of Aedes japonicus japonicus in Oklahoma, 2017

2018 ◽  
Vol 34 (1) ◽  
pp. 38-41 ◽  
Author(s):  
David Bradt ◽  
Lisa Coburn ◽  
Kristy K. Bradley ◽  
Bruce H. Noden
Keyword(s):  
Invasive Species ◽  
Zika Virus ◽  
Mosquito Species ◽  
First Record ◽  
Mosquito Larvae ◽  
Vector Surveillance ◽  
Aedes Japonicus ◽  
Aedes Japonicus Japonicus ◽  
Adult Females ◽  
Invasive Mosquito

ABSTRACT In spring 2017, mosquito larvae were collected from 25 sites across eastern Oklahoma as part of a Zika virus vector surveillance effort. Aedes japonicus japonicus larvae were collected from horse troughs at 2 sites in Ottawa County, OK. Identification was made using 1 larva stored in 70% ethanol and 3 adult females reared from the larvae. Another invasive mosquito species, Culex coronator, was detected at 2 different sites, adding 2 additional counties to the 9 where the species had been previously reported. The presence of these invasive species in Oklahoma may have an impact on future regional arbovirus concerns.

scholarly journals Diapause characterisation and seasonality of Aedes japonicus japonicus (Diptera, Culicidae) in the northeast of France

Parasite ◽  
2021 ◽  
Vol 28 ◽  
pp. 45
Author(s):  
Eva Krupa ◽  
Nicolas Henon ◽  
Bruno Mathieu
Keyword(s):  
Mosquito Species ◽  
Egg Laying ◽  
Aedes Japonicus ◽  
Diapausing Eggs ◽  
Aedes Japonicus Japonicus ◽  
Winter Temperatures ◽  
Critical Photoperiod ◽  
Invasive Mosquito ◽  
Diapause Incidence ◽  
Invasive Traits

The invasive mosquito Aedes japonicus japonicus (Theobald, 1901) settled in 2013 in the Alsace region, in the northeast of France. In this temperate area, some mosquito species use diapause to survive cold winter temperatures and thereby foster settlement and dispersal. This study reports diapause and its seasonality in a field population of Ae. japonicus in the northeast of France. For two years, eggs were collected from May to the beginning of November. They were most abundant in summer and became sparse in late October. Diapause eggs were determined by the presence of a fully developed embryo in unhatched eggs after repeated immersions. Our study showed effective diapause of Ae. japonicus in this part of France. At the start of the egg-laying period (week 20), we found up to 10% of eggs under diapause, and this rate reached 100% in October. The 50% cut-off of diapause incidence was determined by the end of summer, leading to an average calculated maternal critical photoperiod of 13 h 23 min. Interestingly, diapause was shown to occur in part of the eggs even at the earliest period of the two seasons, i.e. in May of each year. Even though we observed that the size of eggs was positively correlated with diapause incidence, morphology cannot be used as the unique predictive indicator of diapause status due to overlapping measurements between diapausing and non-diapausing eggs. This study provides new knowledge on diapause characterisation and invasive traits of Ae. japonicus.

scholarly journals At the tip of an iceberg: citizen science and active surveillance collaborating to broaden the known distribution of Aedes japonicus in Spain

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Roger Eritja ◽  
Sarah Delacour-Estrella ◽  
Ignacio Ruiz-Arrondo ◽  
Mikel A. González ◽  
Carlos Barceló ◽  
...  
Keyword(s):  
Citizen Science ◽  
Active Surveillance ◽  
Mosquito Control ◽  
Mosquito Species ◽  
Surveillance Systems ◽  
Northern Spain ◽  
Surveillance Strategy ◽  
Aedes Japonicus ◽  
Invasive Mosquito Species ◽  
Invasive Mosquito

Abstract Background Active surveillance aimed at the early detection of invasive mosquito species is usually focused on seaports and airports as points of entry, and along road networks as dispersion paths. In a number of cases, however, the first detections of colonizing populations are made by citizens, either because the species has already moved beyond the implemented active surveillance sites or because there is no surveillance in place. This was the case of the first detection in 2018 of the Asian bush mosquito, Aedes japonicus, in Asturias (northern Spain) by the citizen science platform Mosquito Alert. Methods The collaboration between Mosquito Alert, the Ministry of Health, local authorities and academic researchers resulted in a multi-source surveillance combining active field sampling with broader temporal and spatial citizen-sourced data, resulting in a more flexible and efficient surveillance strategy. Results Between 2018 and 2020, the joint efforts of administrative bodies, academic teams and citizen-sourced data led to the discovery of this species in northern regions of Spain such as Cantabria and the Basque Country. This raised the estimated area of occurrence of Ae. japonicus from < 900 km2 in 2018 to > 7000 km2 in 2020. Conclusions This population cluster is geographically isolated from any other population in Europe, which raises questions about its origin, path of introduction and dispersal means, while also highlighting the need to enhance surveillance systems by closely combining crowd-sourced surveillance with public health and mosquito control agencies’ efforts, from local to continental scales. This multi-actor approach for surveillance (either passive and active) shows high potential efficiency in the surveillance of other invasive mosquito species, and specifically the major vector Aedes aegypti which is already present in some parts of Europe. Graphical abstract

scholarly journals Effects of Selection to Diflubenzuron and Bacillus thuringiensis Var. Israelensis on the Overwintering Successes of Aedes albopictus (Diptera: Culicidae)

Insects ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 822
Author(s):  
Charalampos S. Ioannou ◽  
Christos Hadjichristodoulou ◽  
Varvara A. Mouchtouri ◽  
Nikos T. Papadopoulos
Keyword(s):  
Bacillus Thuringiensis ◽  
Aedes Albopictus ◽  
Selection Process ◽  
Mosquito Species ◽  
Fold Increase ◽  
Development Of Resistance ◽  
Control Programmes ◽  
Invasive Mosquito ◽  
In The Wild ◽  
Successive Generations

Aedes albopictus is an invasive mosquito species responsible for local transmission of chikungunya and dengue viruses in Europe. In the absence of available treatments, insecticides-based control remains one of the most important viable strategies to prevent emerging problems. Diflubenzuron (DFB) and Bacillus thuringiensis var. israelensis (Bti) are among the most commonly used larvicides for Ae. albopictus control with consequent concerns for the potential development of resistance. Studies on the resistance emergence in Ae. albopictus and its persistence in the wild to both DFB and Bti are essential for the efficient and sustainable planning of the control programmes. In this context, larvae from a recently laboratory established population were subjected to increasing selective pressure for nine successive generations using both DFB and Bti. The resistance levels and the overwintering success of the selected populations relative to control (colonies that received no selection) were determined. Results revealed an 8.5- and 1.6-fold increase on the resistance levels following selection with DFB and Bti, respectively. The selection process to both larvicides had no apparent impacts on the overwintering capability relative to control, suggesting the successful persistence of the selected individuals in the wild on an annual base.

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