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Volume 65 (2014)
- Issue 4 Pages 167-
- Issue 3 Pages 131-
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 65, Issue 1
Displaying 1-6 of 6 articles from this issue
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Review
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Ryusei KUWATAArticle type: Review
2014 Volume 65 Issue 1 Pages 1-11
Published: March 25, 2014
Released on J-STAGE: November 01, 2014
JOURNAL FREE ACCESSCulex tritaeniorhynchus Giles (Diptera: Culicidae) is one of the main vector mosquitoes of Japanese encephalitis virus, which cause severe encephalitis and death for human in Asian countries. Recent studies have revealed a biodiversity of virus species in wild mosquito populations, and thus far, 14 viruses belonging to eight virus families (Flaviviridae, Togaviridae, Mesoniviridae, Nodaviridae, Rhabdoviridae, Bunnyaviridae, Reoviridae, and Parvoviridae), have been found in Cx. tritaeniorhynchus and characterized them. In this review, I describe the 14 virus species associating with Cx. tritaeniorhynchus in the world, in the purpose of a deep understanding for mosquito-virus complexes.View full abstractDownload PDF (3427K)
Original Articles
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Ai TAKANO, Hiromi FUJITA, Teruki KADOSAKA, Mamoru TAKAHASHI, Takeo YAM ...Article type: Original Article
2014 Volume 65 Issue 1 Pages 13-21
Published: March 25, 2014
Released on J-STAGE: November 01, 2014
JOURNAL FREE ACCESSTick identification is important in control of tick-born diseases because tick-borne pathogens are often transmitted by specific tick species. In this study, we determined partial DNA sequences of the mitochondrial 16S rDNA gene (mt-rrs) for ticks including 7 genera and 39 species, and these ticks were allocated to 113 sequence types. Of the 39 species of ticks, 36 species (92.3%) were distinguishable by phylogenetic analysis of mt-rrs. This result suggests that species identification of ticks based on mt-rrs is a viable alternative to morphological identification. In order to establish a DNA database for identification of ixodid and argasid ticks in Japan, we deposited all sequence data in GenBank (from AB819156 to AB819268).View full abstractDownload PDF (346K) -
Shinichi NODA, Sota YAMAMOTO, Takako TOMAArticle type: Original Article
2014 Volume 65 Issue 1 Pages 23-27
Published: March 25, 2014
Released on J-STAGE: November 01, 2014
JOURNAL FREE ACCESSMosquito larval surveys were carried out on Weno Island, Romanum Island and Piis-Paneu Island, in Chuuk State, the Federated States of Micronesia in August 2011. Larvae were collected from 133 natural and artificial habitats. A total of 1,761 larvae belonging to nine species including one unidentified species were collected. On Weno Island, eight species, Aedes hensilli, Ae. albopictus, Ae. lamelliferus, Aedes sp., Culex quinquefasciatus, Cx. carolinensis, Cx. annulirostris and Lutzia vorax, were collected. Four species were collected on Romanum Island; Ae. scutoscriptus, Ae. hensilli, Cx. quinquefasciatus and Cx. carolinensis and six species were collected on Piis-Paneu Island; Ae. scutoscriptus, Ae. hensilli, Aedes sp., Cx. quinquefasciatus, Cx. carolinensis and Cx. annulirostris. We determined that 1) Ae. albopictus and Lt. vorax were newly reported in Chuuk State, 2) Ae. hesilli was the predominant species on both Weno Island and Piis-Paneu Island and distributed in Romanum Island and 3) that Ae. albopictus existed on Weno Island. Environmental management program seeks to alter the environment to prevent to minimize vector propagation and human contact with the vector-pathogen. Recommended changes to the environment include destroying, altering, removing or recycling nonessential containers that provide larval habitats for these species of mosquitoes.View full abstractDownload PDF (1378K) -
Keiko KOSONE, Mayumi ITO, Akihiro KANAYAMAArticle type: Original Article
2014 Volume 65 Issue 1 Pages 29-31
Published: March 25, 2014
Released on J-STAGE: November 01, 2014
JOURNAL FREE ACCESSThe vertical movement of the German cockroach Blattella germanica (Linnaeus) to upper floors was studied using a 700 cm vinyl tube as a model of a drainpipe in buildings and houses. The whole experiment was conducted in the dark. After three days of acclimatization with twenty cockroaches, the acclimated container was connected to the bottom of the tube on the third floor of a building, and two new containers were connected to the tube on the fourth floor (350 cm distant from the third floor) and fifth floors (700 cm distant), respectively. The cockroaches in each container were counted daily for four weeks. Food and water were set in the container on the third floor from the first to seventh day of the experiment, and from the eighth to 28th day, they were placed only in the containers on the fourth and fifth floors. Twenty-eight percent of both male and female German cockroaches stayed in the acclimated container for the first seven days. After food and water were moved to the new containers, many cockroaches moved to the new containers. For the last seven days, 30% of the males and 13% of the females stayed in the new containers, while 7.7% of males and 5.4% females stayed in the acclimated container. Thus, the cockroaches used the vinyl tube for both a passage and for a harborage.View full abstractDownload PDF (387K)
Short Communications
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Minoru NAKAO, Takuya ITOArticle type: Short Communication
2014 Volume 65 Issue 1 Pages 33-35
Published: March 25, 2014
Released on J-STAGE: November 01, 2014
JOURNAL FREE ACCESSAs a general view, the ixodid tick Haemaphysalis japonica is distributed in Japan (Kyushu, Honshu and Hokkaido islands) and in a continental area including Russia Primorsky Krai, eastern China and the Korean Peninsula. The continental population is treated as a subspecies, Haemaphysalis japonica douglasi. The Hokkaido population was once named Haemaphysalis jezoensis, but synonymized with H. japonica. An irregular taxonomic revision, however, elevated H. japonica douglasi to specific rank for the continental and Hokkaido populations. The resultant “Haemaphysalis douglasi” sensu Kitaoka is obviously invalid because of the lack of taxonomic literatures about its specific status. Even in the present time, the invalid name has yet been used for tick identification in Hokkaido. In this study, nucleotide sequences of mitochondrial DNA (large subunit ribosomal RNA gene) and nuclear DNA (internal transcribed spacer 2) were compared between adult samples of H. japonica from Honshu and those of “H. douglasi” from Hokkaido. The target sequences of the Hokkaido samples were completely identical with those of the Honshu samples, indicating that the elevation of H. japonica douglasi to specific rank or the resurrection of H. jezoensis is an inadequate treatment. The result clearly shows that H. japonica is distributed in Hokkaido.View full abstractDownload PDF (113K) -
Hitoshi SASAKIArticle type: Short Communication
2014 Volume 65 Issue 1 Pages 37-39
Published: March 25, 2014
Released on J-STAGE: November 01, 2014
JOURNAL FREE ACCESSA faunal survey on the blood sucking tabanid flies was carried out in Yagishiri island and Teuri island from July 30th to 31st, 2013 by using CO2 lured NZI traps and sweeping. In Yagishiri island, 48 Tabanus chrysurus and 2 Tabanus nipponicus were captured by NZI trap and one individual of T. nipponicus was collected by sweeping. This is the first record of tabanid flies from Yagishiri island. On the other hand, one individual of T. chrysurus and two individuals of T. rufidens were captured by NZI trap and one T. nipponicus was collected by sweeping. Captured T. chrysurus and T. nipponicus are new findings in Teuri island. In addition, the tabanid fly collecting data from six isolated islands of Hokkaido were summarized.View full abstractDownload PDF (260K)
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