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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 3
Displaying 1-5 of 5 articles from this issue
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Original Articles
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Yoshio TSUDA, Toshihiko HAYASHIArticle type: Original Article
2014 Volume 65 Issue 3 Pages 131-137
Published: September 25, 2014
Released on J-STAGE: February 05, 2015
JOURNAL FREE ACCESSMosquitoes were collected weekly from May 2003 to December 2013 at a pair of sites within the premises of the National Institute of Infectious Diseases, Tokyo, Japan. The mosquito trap was equipped with 1 kg dry ice and battery-operated suction mechanism. A total of 10,546 adults belonging to 7 species in 3 genera were collected in this study. Aedes albopictus and Cx. pipiens gr. were the dominant mosquitoes, composing 99.7% of the total mosquitoes collected. Six and 12 adults of Cx. tritaeniorhynchus were collected in early spring and in late summer to autumn, respectively. More Cx. pipiens gr. were collected at the high trap site near a tree canopy rather than the low trap site near the ground every year, whereas only 1 to 15% of Ae. albopictus were collected at the high trap site, indicating a difference in searching behavior between the two species. The female density of Cx. pipiens gr. was high (>10/trap/day) during early June to early August, and a high Cx. pipiens gr.-related risk is expected in this period. Density of female Ae. albopictus was high (>10/trap/day) during the 28th to 41st week, suggesting a high risk of transmission of Ae. albopictus-borne pathogens from mid-July to mid-October in Tokyo.View full abstractDownload PDF (190K) -
Samuel ADU-ACHEAMPONG, Rosina KYEREMATEN, Samuel DADZIE, Maxwell APPAW ...Article type: Original Article
2014 Volume 65 Issue 3 Pages 139-145
Published: September 25, 2014
Released on J-STAGE: February 05, 2015
JOURNAL FREE ACCESSThis study was to provide baseline information on patterns of coil usage, user acceptability and susceptibility levels of mosquito coils in some parts of Accra, Ghana. Three hundred and twenty questionnaires were administered to obtain information on knowledge and perception of respondents on the usage of mosquito coils. Adult Anopheles gambiae mosquitoes were tested for resistance to pyrethroid based mosquito coils using WHO standard protocol for testing household insecticide products. A total of 152 out of 320 respondents were direct users of coils. Close to 62% of this number frequently changes brands of coil they use. Over 61% of coil users indicated their willingness to continue to use coils even though there are adverse effects after use. Anopheles gambiae s.s. was the only species that was found in the study area. Mortalities of An. gambiae s.s. after exposure to coils were 37% for Angel®, 37.5% for Lord® and 15% for Heaven mosquito coil brands. More than half of the inhabitants in the area used coils to prevent mosquito bites. However, high levels of resistance was detected for all the three pyrethroid-based coils because West African kdr was detected in about 59% of samples of Anopheles gambiae s.s. that survived the exposure.View full abstractDownload PDF (151K) -
Mohamad REZA, Daisuke S. YAMAMOTO, Hiroyuki MATSUOKAArticle type: Original Article
2014 Volume 65 Issue 3 Pages 147-150
Published: September 25, 2014
Released on J-STAGE: February 05, 2015
JOURNAL FREE ACCESSIn the previous studies, we demonstrated that larvae of Anopheles stephensi died within two weeks after the exposure of the larvae to 2.4 ppm of copper solution. The ability of copper to kill mosquito larvae prompted us to examine its applicability to ovitraps. We demonstrated in this study that 10 ppm of copper killed more than 90% of larvae (Anopheles stephensi, Aedes albopictus and Culex pipiens pallens) in 96 hours. At 3.3 ppm, Cx. pipiens was more sensitive than An. stephensi and Ae. albopictus. Fifty percent of Cx. pipiens larvae died within 24 hours but An. stephensi and Ae. albopictus survived more than 50% at 48 hours. We also observed that gravid mosquitoes of An. stephensi, Ae. albopictus, and field-collected An. sinensis did not detect nor avoid 10 ppm copper solution for laying eggs under laboratory conditions. These results suggest that copper could be used in ovitraps as a low cost alternative and the eradication of mosquito-borne diseases.View full abstractDownload PDF (230K) -
Chiaki TSURUKAWA, Hitoshi KAWADAArticle type: Original Article
2014 Volume 65 Issue 3 Pages 151-155
Published: September 25, 2014
Released on J-STAGE: February 05, 2015
JOURNAL FREE ACCESSExperiments on blood feeding of Aedes aegypti using the artificial membrane feeding system (Hemotek Ltd., Blackburn, UK), selection of good animal bloods and membranes, which were commercially available from reagent manufacturers or food companies, as good experimental materials for artificial membrane feeding of mosquitoes, were carried out. Among the 3 kinds of preserved bloods (chicken, bovine, and equine), the equine defibrinated blood, and the equine hemolyzed blood, the preserved bloods gave the best feeding results. Natural porcine gut for sausage casing was the most successful membrane as compared to the two collagen films and Parafilm®. Combinational use of the bovine preserved blood and the porcine gut membrane gave good feeding results for Ae. aegypti and Anopheles stephensi.View full abstractDownload PDF (1382K) -
Hiroshi YAMANISHIArticle type: Original Article
2013 Volume 65 Issue 3 Pages 157-162
Published: September 25, 2014
Released on J-STAGE: February 05, 2015
JOURNAL FREE ACCESSA survey of Paragonimus ohirai metacercariae in the brackish water crab Sesarma dehaani was conducted from 2010 to 2013 on the Kikuyajima Sandbank near the mouth of the Maruyama River in northern Hyogo Prefecture. The infection rates from 2010 to 2013 were 88.3%, 81.6%, 84.4% and 87.5%, respectively. The numbers of metacercariae per crab were 14.8, 10.9, 6.7 and 10.9 from 2010 to 2013, respectively. The maximum number of metacercariae found in a single crab was 163 in 2010, 97 in 2011, 41 in 2012 and 84 in 2013. On the opposite shore of the Kikuyajima Sandbank, the infection rate of S. dehaani with P. ohirai metacercariae was 35.3% in 2011.
Adding the data from 2001 to 2009, the change of the infection rate and the numbers of metacercariae per crab were considered. Despite the high infection rates observed on the Kikuyajima Sandbank, the number of P. ohirai metacercariae in S. dehaani was recently observed to decrease through 13 years.View full abstractDownload PDF (2088K)
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