Geographical data on the occurrence and spreading of invasive Aedes mosquito species in Northeast Italy

Abstract Background: Invasive mosquito species (IMS) and their associated mosquito-borne diseases are emerging in Europe. In Belgium, the first detection of Aedes albopictus occurred in 2000 and of Aedes japonicus in 2002. Early detection and control of these IMS at points of entry (PoE’s) are of paramount importance to slow down any possible establishment. This paper gives an account of the IMS surveillance in Belgium between 2007 and 2020 and reviews the introductions and establishments recorded in that period.Methods: In total 52 PoE’s were monitored at least once for the presence of IMS between 2007 and 2020. These included used tyre and lucky bamboo import companies, airports, ports, parking lots along highways, shelters for imported cutting plants, wholesale markets, industrial areas, recycling areas, and cemeteries and an allotment garden at the country border with colonised areas. In general, monitoring was performed between April and November. Mosquitoes were captured with adult and oviposition traps, as well as by larval sampling. A logistic regression was performed to investigate the percentage of positive PoE’s for Ae. albopictus over the years. Results: Aedes albopictus has been detected at ten PoE’s, Ae. japonicus at three PoE’s and Aedes koreicus at two PoE’s. The latter two species have established overwintering populations. The percentage of PoE’s positive for Ae. albopictus increased significantly over time. Aedes albopictus is currently entering Belgium through lucky bamboo trade, used tyre trade and passive ground transport, while Ae. japonicus only through the latter two pathways. In Belgium, the import through passive ground transport was first recorded in 2018 and its importance seems to grow.Conclusion: Belgium is currently at the invasion front of Ae. albopictus and Ae. japonicus. The surveillance and control management actions at well-known PoE‘s associated to long-distance introductions are more straightforward than at less-defined PoE’s associated with short-distance introductions from colonised areas. These latter PoE’s represent a new challenge for IMS management in Belgium in the coming years and stresses the urgence of implementing a sustainable, structured and long-term IMS management programme, integrating active and passive surveillance and control.

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Characterization of a LINE retroposon dispersed in the genome of three non-sibling Aedes mosquito species

Gene ◽

10.1016/0378-1119(92)90092-4 ◽

1992 ◽

Vol 120 (2) ◽

pp. 183-190 ◽

Cited By ~ 18

Author(s):

Claude Mouchès ◽

Nacira Bensaadi ◽

Jean-Claude Salvado

Keyword(s):

Mosquito Species ◽

Aedes Mosquito

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Effects of Color and Perforated Lid on Ovitrap Preference of Aedes aegypti and Aedes albopictus

Journal of the American Mosquito Control Association ◽

10.2987/20-6948.1 ◽

2020 ◽

Vol 36 (4) ◽

pp. 240-244

Author(s):

Takashi Tsunoda ◽

Dung Thi Nguyen ◽

Trang Vi Quynh

Keyword(s):

Aedes Aegypti ◽

Aedes Albopictus ◽

Mosquito Species ◽

Oviposition Preference ◽

Sampling Efficiency ◽

Aedes Mosquito ◽

Mosquito Surveillance ◽

And Control

ABSTRACT The shape and color of an ovitrap affect the sampling efficiency of mosquitoes. We examined the effect of perforated lids of different colored cups on the preference of Aedes aegypti and Ae. albopictus for oviposition containers. The mosquito species were collected from Tuy Hoa City, Phu Yen Province, Vietnam in April 2016. Females of both species laid eggs in cups without a lid in the order of black, red, and green. However, the number of eggs laid by both species was not different between the black cups with a perforated lid and those without a lid. Aedes aegypti females laid more eggs in red cups with a perforated lid than cups without a lid. Green cups with a perforated lid were not preferred by Ae. aegypti and Ae. albopictus. Our results showed that the effect of perforated lids on oviposition preference was dependent on cup color and that it differed between the mosquito species. Out study provides valuable insights for the development of more effective ovitraps for Aedes mosquito surveillance and control.

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Aedes Mosquito Distribution along a Transect from Rural to Urban Settings in Yaoundé, Cameroon

Insects ◽

10.3390/insects12090819 ◽

2021 ◽

Vol 12 (9) ◽

pp. 819

Author(s):

Borel Djiappi-Tchamen ◽

Mariette Stella Nana-Ndjangwo ◽

Timoléon Tchuinkam ◽

Idene Makoudjou ◽

Elysée Nchoutpouen ◽

...

Keyword(s):

Rural Areas ◽

Disease Transmission ◽

Urban Areas ◽

Linear Models ◽

Mosquito Species ◽

Distribution Patterns ◽

Transmission Risk ◽

Aedes Mosquito ◽

Mosquito Abundance ◽

Rural Sites

Introduction: The surveillance of mosquito vectors is important for the control of arboviruses diseases worldwide. Detailed information on the bionomics and distribution of their main vectors, Aedes aegypti and Aedes albopictus, is essential for assessing disease transmission risk and for better planning of control interventions. Methods: Entomological surveys were carried out from November 2019 to November 2020 in six localities of Yaoundé city following a transect from urban to rural settings: two urban (Obili, Mvan), two peri-urban (Simbock, Ahala) and two rural areas (Lendom, Elig-essomballa)—during rainy and dry seasons. All water containers were inspected. Aedes mosquito abundance, species distribution and seasonal distribution patterns were compared using generalized linear models. Stegomyia indexes were estimated to determine the risk of arbovirus transmission. Results: A total of 6332 mosquitoes larvae were collected (2342 in urban areas, 1694 in peri-urban areas and 2296 in rural sites). Aedes species recorded included Ae. albopictus, Ae. aegytpi, Ae. simpsoni and Aedes spp. High mosquito abundance was registered in the rainy season (4706) compared to the dry season (1626) (p < 0.0001). Ae. albopictus was the most abundant Aedes species in urban (96.89%) and peri-urban (95.09%) sites whereas Ae. aegypti was more prevalent in rural sites (68.56%) (p < 0.0001). Both species were found together in 71 larval habitats. Ae. albopictus was mostly found in discarded tires (42.51%), whereas Ae. aegypti was more prevalent in plastic containers used for storing water (65.87%). The majority of Aedes mosquitoes’ breeding places were situated close to human dwellings (0–10 m). Conclusion: Uncontrolled urbanization seems to greatly favour the presence of Aedes mosquito species around human dwellings in Yaoundé. Controlling Aedes mosquito distribution is becoming urgent to reduce the risk of arbovirus outbreaks in the city of Yaoundé.

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Kelimpahan Aedes spp. di kota semarang, purwokerto dan yogyakarta

Jurnal Entomologi Indonesia ◽

10.5994/jei.5.1.45 ◽

2017 ◽

Vol 5 (1) ◽

pp. 45

Author(s):

Nur Endah Wahyuningsih ◽

Edi Dharmana ◽

Endang Kusnawati ◽

Aris Sulistiawan ◽

Edy Purwanto

Keyword(s):

Mosquito Control ◽

Mosquito Species ◽

Case Fatality ◽

Survey Method ◽

Morbidity Rate ◽

High Morbidity ◽

Control Methods ◽

Aedes Mosquito ◽

High Morbidity Rate ◽

Descriptive Survey

Abundance of Aedes spp. in Semarang, Purwokerto and Yogyakarta. In Indonesia, Dengue Fever has a high morbidity rate. Incidence Rate (IR) during 39 years (1968-2007) showed a tendency to increase 00-30 per 100,000 populations, but the Case Fatality Rate (CFR) shows a decrease trend from 40% to 1.6%. Method of mosquito control that is mostly done today is chemical control methods. Unfortunately, this method is not always. A survey to find out the composition of the Aedes mosquito species in the field needs to as the first step to improve the method of vector control. This study employed a descriptive survey method, be done, taking eggs and adult mosquitoes from the three cities. From each city. Eggs and adult mosquitoes of Aedes spp from 90 ovitraps and 18 field locations were taken. Eggs obtained from Semarang, Purwokerto and Yogyakarta are 1835, 833, 1345, from 27 (30%), 22 (24,44%) and 25 (27,7%) ovitraps respectively, consisting of species A. aegypti and A. albopictus. A. aegypti and A. albopictus adults obtained in Semarang 17 (5%) and 323 (95%), in Purwokerto 6 (7%) and 81 (93%), while in Yogyakarta, 36 (25%) and 105 (75%) respectively. Research results show that in three cities A albopictus was more abundant than the A. aegypti.

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A Cluster of Dengue Cases in Travelers: A Clinical Series from Thailand

Tropical Medicine and Infectious Disease ◽

10.3390/tropicalmed6030152 ◽

2021 ◽

Vol 6 (3) ◽

pp. 152

Author(s):

Hisham A. Imad ◽

Juthamas Phadungsombat ◽

Emi E. Nakayama ◽

Lapakorn Chatapat ◽

Phimphan Pisutsan ◽

...

Keyword(s):

Mosquito Species ◽

Clinical Manifestations ◽

Warning Signs ◽

Aedes Mosquito ◽

Rt Pcr ◽

Subsequent Infection ◽

Clinical Series ◽

Serotype 1 ◽

Ns1 Antigen ◽

Global Travel

Dengue is an overlooked tropical disease for which billions of people are at risk. The disease, caused by a Flavivirus with four distinct serotypes, is transmitted primarily by urban Aedes mosquito species. The infection leads to a spectrum of clinical manifestations, with the majority being asymptomatic. Primary dengue fever and, to a greater extent, a subsequent infection with a different serotype is associated with increased severity. Increased global travel and recreational tourism expose individuals naïve to the dengue viruses, the most common arboviral infections among travelers. We describe a cluster of possible primary acute dengue infections in a group of 12 individuals who presented to Bangkok Hospital for Tropical Diseases in 2017. Infection was confirmed by dengue NS1 antigen and multiplex real-time RT-PCR. Nine individuals required hospitalization, and four developed dengue warning signs. Leukocytes, neutrophils, and platelets declined towards defervescence and were negatively correlated with day of illness. Six clinical isolates were identified as dengue serotype-1, with 100% nucleotide identity suggesting that these patients were infected with the same virus.

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