Retrospective search for dengue vector mosquito Aedes albopictus in areas visited by a German traveler who contracted dengue in Japan

Kobayashi, Mutsuo; Komagata, Osamu; Yonejima, Mayuko; Maekawa, Yoshihide; Hirabayashi, Kimio; Hayashi, Toshihiko; Nihei, Naoko; Yoshida, Masahiro; Tsuda, Yuichi; Sawabe, Kyoko

doi:10.1016/j.ijid.2014.06.005

Cited by 24 publications

(18 citation statements)

References 8 publications

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“…The primary vector mosquito of dengue in Japan is Aedes albopictus (Skuse), that is distributed widely across the country (4,5). Geographic distribution of Ae.…”

Section: Introductionmentioning

confidence: 99%

Biting Density and Distribution of <i>Aedes albopictus</i> during the September 2014 Outbreak of Dengue Fever in Yoyogi Park and the Vicinity of Tokyo Metropolis, Japan

et al. 2016

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SUMMARY: A total of 160 autochthonous dengue cases transmitted by Aedes albopictus were reported between August and October of 2014 in Tokyo Metropolis, Japan. Ae. albopictus is a medically important vector of dengue virus, which has expanded its geographic distribution in temperate regions. Understanding the distribution and biting density of Ae. albopictus during the 2014 dengue outbreak in Tokyo is important to evaluate the epidemic risks of dengue fever in other highly populated cities in Europe and Asia. Of the 160 patients, 134 visited the same park (Yoyogi park) located in central Tokyo. Mosquitoes infected with dengue virus were collected from this park, suggesting that it was the exclusive location for the transmission of dengue. This study aimed to collect referential data to estimate the transmission threshold of dengue virus in terms of biting density of Ae. albopictus and determined high transmission risk areas of dengue virus in Yoyogi Park and its vicinity. The overall mean density of biting Ae. albopictus (7.13/man/8 min) was sufficiently high for successful transmission of dengue virus, and areas with biting densities higher than the overall mean density were classified as high risk areas for the transmission of dengue virus in Yoyogi Park.

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“…The primary vector mosquito of dengue in Japan is Aedes albopictus (Skuse), that is distributed widely across the country (4,5). Geographic distribution of Ae.…”

Section: Introductionmentioning

confidence: 99%

Biting Density and Distribution of <i>Aedes albopictus</i> during the September 2014 Outbreak of Dengue Fever in Yoyogi Park and the Vicinity of Tokyo Metropolis, Japan

et al. 2016

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“…A. albopictus is present in Japan, and in August 2012, invasion of the yellow fever mosquito, A. aegypti, was reported at Narita International Airport (3) and then at Haneda International Airport in early to mid-2013 (personal communication). Moreover, in late August 2013, a single DENV infection was confirmed in a German individual travelling to Japan (4,5). In this study, we demonstrated the susceptibility of foreign (imported) and Japanese (indigenous) Aedes mosquito spp.…”

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confidence: 51%

Susceptibility of Indigenous and Transplanted Mosquito Spp. to Dengue Virus in Japan

et al. 2015

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SUMMARY: Dengue fever, an acute, mosquito-borne, febrile illness caused by Flavivirus spp., is a problem in Africa, South and Southeast Asia, Latin America, and the Caribbean. A dengue outbreak occurred after nearly 70 years of absence or no detection, and then 158 autochthonous cases occurred in Japan from August to October 15, 2014. The most competent mosquito vectors for dengue virus transmission were Aedes aegypti and A. albopictus. Since A. albopictus is widely distributed across Japan and A. aegypti recently invaded Japan by airplane, we examined the susceptibility of these species to infection by dengue virus.Dengue virus (DENV), which is transmitted by Aedes mosquitoes, is a global public health concern associated with an average of 390 million infections annually, 96 million of which are severe (1). In Japan, 249 cases of imported dengue fever were reported in 2013 (2). A. albopictus is present in Japan, and in August 2012, invasion of the yellow fever mosquito, A. aegypti, was reported at Narita International Airport (3) and then at Haneda International Airport in early to mid-2013 (personal communication). Moreover, in late August 2013, a single DENV infection was confirmed in a German individual travelling to Japan (4,5). In this study, we demonstrated the susceptibility of foreign (imported) and Japanese (indigenous) Aedes mosquito spp. to DENV infection. Although, A. aegypti has been compared with A. albopictus in DENV-infection experiments by Vazeille et al., a quantitative analysis of the salivary glands (SG), which are known to facilitate DENV transmission, was not performed (6). Furthermore, there are no reports of DENV1-transmission experiments in the literature (6). Furthermore, we must be careful while interpreting the results of our studies when using A. albopictus colonies with greater than F40 generations for DENV2-transmission experiments, as described by Vazeille et al. (6).Although, DENV2 antigen has been detected in the SG of A. aegypti, a quantitative analysis failed to confirm these findings (7). In addition, a quantitative realtime reverse transcription-polymerase chain reaction (qRT-PCR) analysis failed to show DENV1 transmission (8).For the DENV-transmission experiments, we used DENV1, D1 (11-120), isolated from the serum of a returnee from Bangkok, Thailand, and DENV2, D2 (11-122/1), isolated from the serum of a returnee from Bali, Indonesia (both provided by the Department of Virology I, National Institute of Infectious Diseases). The experimental mosquitoes were A. aegypti, LBN strain, collected in Los Banos, Philippines (2011); A. albopictus IKT strain, collected in Kawasaki, Kanagawa Prefecture, Japan (2008); A. albopictus EBN strain, collected in Ebina, Kanagawa Prefecture, Japan (2012); and A. albopictus HCM strain, collected in Ho Chi Minh, Vietnam (2013). Four-to five-day-old adult mosquitoes were orally infected with DENV by exposure to blood mixed with 10 5 copies/mL of DENV in artificial membrane feeders. After 1 h of feeding, the mosquitoes were maintained at 289 C f...

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“…albopictus mosquitoes in Tokyo is higher than that in suburban areas ( 11 ). It is possible that high human and mosquito population densities contributed to this outbreak.…”

Section: Discussionmentioning

confidence: 98%

Autochthonous Dengue Fever, Tokyo, Japan, 2014

Kutsuna¹,

Kato²,

Moi³

et al. 2015

Emerg. Infect. Dis.

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Retrospective search for dengue vector mosquito Aedes albopictus in areas visited by a German traveler who contracted dengue in Japan

Cited by 24 publications

References 8 publications

Biting Density and Distribution of <i>Aedes albopictus</i> during the September 2014 Outbreak of Dengue Fever in Yoyogi Park and the Vicinity of Tokyo Metropolis, Japan

Biting Density and Distribution of <i>Aedes albopictus</i> during the September 2014 Outbreak of Dengue Fever in Yoyogi Park and the Vicinity of Tokyo Metropolis, Japan

Susceptibility of Indigenous and Transplanted Mosquito Spp. to Dengue Virus in Japan

Autochthonous Dengue Fever, Tokyo, Japan, 2014

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