First Record of Avian Plasmodium DNA from Mosquitoes Collected in the Yaeyama Archipelago, Southwestern Border of Japan

Ejiri, Hiroko; Sato, Yukita; Kim, Kyeong-Soon; Tamashiro, Mikako; Tsuda, Yuichi; Toma, Takako; Miyagi, Ichiro; Murata, Koichi; Yukawa, Masayoshi

doi:10.1292/jvms.11-0190

Cited by 8 publications

(5 citation statements)

References 21 publications

(39 reference statements)

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“…andamanensis Barraud which are known to bite human (Zavortink, 1971). Culex nigropunctatus might be avian feeder, as two identical avian Plasmodium lineages were detected from the females collected in Ishigaki and Iriomote Islands (Ejiri et al, 2011). Some females of Mi.…”

Section: Discussionmentioning

confidence: 97%

Mosquitoes and frog-biting midges (Diptera: Culicidae and Corethrellidae) attracted to traps with natural frog calls and synthesized sounds at Iriomote Island, Ryukyu Archipelago, Japan

Toma

Takara

Miyagi

et al. 2019

Jap. J. Sanit. Zool.

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The attractiveness of frog sounds to biting Uranotaenia mosquitoes and Corethrella midges was determined using natural and synthesized sounds. The traps with each species' call of eight frog species or a series of them, were set in a forest of Iriomote Island. Out of 17 mosquito species collected, Uranotaenia macfarlanei Edwards was the predominant species. Most Ur. macfarlanei females were collected by characteristic calls which had dominant frequency of about 1,000 Hz. We synthesized 23 sounds which varied in frequency spectrum (original burst, sinusoidal, and noise), wave form, repeated rhythm, and loudness of sounds. The burst sound was synthesized by editing the original scream of male Fejervarya sakishimensis Matsui et al., which had two dominant frequencies of 1,038 Hz and 2,312 Hz. The sinusoidal sound had a dominant frequency of 1,000 Hz, while the noise sound had no dominant frequency. Uranotaenia macfarlanei females were collected with the original burst and sinusoidal sounds more than noise sound. They were also well attracted when loudness was higher than about 75 dB SPL. The original burst sound also attracted Corethrella nippon Miyagi more than sinusoidal and noise sounds. Prediction model indicated that low loudness sounds still attracted C. nippon compared to Ur. macfarlanei.

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Section: Discussionmentioning

confidence: 97%

Mosquitoes and frog-biting midges (Diptera: Culicidae and Corethrellidae) attracted to traps with natural frog calls and synthesized sounds at Iriomote Island, Ryukyu Archipelago, Japan

Toma

Takara

Miyagi

et al. 2019

Jap. J. Sanit. Zool.

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“…Plasmodium lineage SW5, classified as P. circumflexum , and SW2, classified as P. homonucleophilum , have been recorded from various parts of the world and are thought to be transmitted by Culiseta spp. mosquitoes ( Meyer and Bennett, 1976 , Valkiūnas, 2005 , Ejiri et al., 2011a ). Culiseta spp.…”

Section: Discussionmentioning

confidence: 99%

Prevalence of avian haemosporidia among injured wild birds in Tokyo and environs, Japan

Inumaru

Murata

Sato

2017

International Journal for Parasitology: Parasites and Wildlife

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Avian haemosporidia have been reported in various birds of Japan, which is part of the East Asian-Australian flyway and is an important stopover site for migratory birds potentially carrying new pathogens from other areas. We investigated the prevalence of avian malaria in injured wild birds, rescued in Tokyo and surrounding areas. We also evaluated the effects of migration by examining the prevalence of avian malaria for each migratory status. 475 birds of 80 species were sampled from four facilities. All samples were examined for haemosporidian infection via nested polymerase chain reaction (PCR) of the cytochrome b (cytb) gene. 100 birds (21.1%) of 43 species were PCR positive for avian haemosporidia. Prevalence in wintering birds, migratory breeders, and resident birds was 46.0%, 19.3%, 17.3% respectively. There was a bias in wintering birds due to Eurasian coot (Fulica atra) and Anseriformes. In wintering birds, lineages which are likely to be transmitted by Culiseta sp. in Northern Japan and lineages from resident species of Northern Japan or continental Asia were found, suggesting that wintering birds are mainly infected at their breeding sites. Meanwhile, there were numerous lineages found from resident and migratory breeders, suggesting that they are transmitted in Japan, some possibly unique to Japan. Although there are limits in studying rescued birds, rehabilitation facilities make sampling of difficult-to-catch migratory species possible and also allow for long-term monitoring within areas.

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“…; Kimura, Darbro & Harrington ; Ejiri et al . ; Kim & Tsuda ; Ventim et al . ), making it possible to study the costs of infection in a natural system.…”

Section: Introductionmentioning

confidence: 99%

Natural malaria infection reduces starvation resistance of nutritionally stressed mosquitoes

Lalubin

Delédevant

Glaizot

et al. 2014

Journal of Animal Ecology

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Summary1. In disease ecology, there is growing evidence that environmental quality interacts with parasite and host to determine host susceptibility to an infection. Most studies of malaria parasites have focused on the infection costs incurred by the hosts, and few have investigated the costs on mosquito vectors. The interplay between the environment, the vector and the parasite has therefore mostly been ignored and often relied on unnatural or allopatric Plasmodium/vector associations. 2. Here, we investigated the effects of natural avian malaria infection on both fecundity and survival of field-caught female Culex pipiens mosquitoes, individually maintained in laboratory conditions. We manipulated environmental quality by providing mosquitoes with different concentrations of glucose-feeding solution prior to submitting them to a starvation challenge. We used molecular-based methods to assess mosquitoes' infection status. 3. We found that mosquitoes infected with Plasmodium had lower starvation resistance than uninfected ones only under low nutritional conditions. The effect of nutritional stress varied with time, with the difference of starvation resistance between optimally and suboptimally fed mosquitoes increasing from spring to summer, as shown by a significant interaction between diet treatment and months of capture. Infected and uninfected mosquitoes had similar clutch size, indicating no effect of infection on fecundity. 4. Overall, this study suggests that avian malaria vectors may suffer Plasmodium infection costs in their natural habitat, under certain environmental conditions. This may have major implications for disease transmission in the wild.

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First Record of Avian Plasmodium DNA from Mosquitoes Collected in the Yaeyama Archipelago, Southwestern Border of Japan

Cited by 8 publications

References 21 publications

Mosquitoes and frog-biting midges (Diptera: Culicidae and Corethrellidae) attracted to traps with natural frog calls and synthesized sounds at Iriomote Island, Ryukyu Archipelago, Japan

Mosquitoes and frog-biting midges (Diptera: Culicidae and Corethrellidae) attracted to traps with natural frog calls and synthesized sounds at Iriomote Island, Ryukyu Archipelago, Japan

Prevalence of avian haemosporidia among injured wild birds in Tokyo and environs, Japan

Natural malaria infection reduces starvation resistance of nutritionally stressed mosquitoes

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