Occurrence of vector mosquitoes at Tsunami disaster areas of the Great East Japan Earthquake

Abstract

Abstract:To evaluate vector situations in the disaster areas of the Great East Japan Earthquake we conducted eld studies on the occurrence of mosquitoes in Rikuzentakata City, Iwate Prefecture and Kesennuma City, Miyagi Prefecture almost every three weeks from June to October and in Minamisoma City, Fukushima Pefecture in September 2011.For adult collections we placed dry-ice baited CDC-light traps at selected sites and captured totals of 3,088 Culex pipiens, 1,430 Cx. tritaeniorhynchus, 62 Aedes albopictus, 58 Cx. inatomii, 13 Anopheles sinensis, and 8 Ae. togoi. e rst two species were captured in large quantities. Mean adult density of Cx. pipiens pallens, Cx. tritaeniorhynchus and Cx. inatomii at Tsunami sub-area was signi cantly higher than No Tsunami and boundary sub-area. In

Acute toxicity of sodium chloride to first and fourth instar <i>Aedes albopictus</i> larvae

“…To date, several studies have shown that Ae. albopictus larvae were not found in outdoor areas where the average salt concentration ranged from 0.11 to 0.73% (Watanabe et al, 2012;Kobayashi et al, 2012). However, the application of salt to these environments needs to be carefully considered.…”

A comparison of predacious aquatic insect fauna and density in ground pools and concrete pools created during the Great East Japan Earthquake in 2011

“…The tsunami completely destroyed urban and rural environments, including buildings, roads, bridges, agricultural fields, and natural vegetation. Abandoned paddy fields, destroyed houses, and ground pools were found containing brackish water carried by the tsunami (Kobayashi et al, 2012;Tsuda et al, 2012;Watanabe et al, 2012). These brackish water pools provide larval habitats of vector mosquitoes and need to be monitored to evaluate risk for outbreak of mosquitoborne disease.…”

“…These brackish water pools provide larval habitats of vector mosquitoes and need to be monitored to evaluate risk for outbreak of mosquitoborne disease. These brackish water pools were utilized by potential West Nile vector mosquito, Culex inatomii (Kamimura and Wada), Culex pipiens group, and Culex tritaeniorhynchus Giles, as larval habitats, suggesting the expansion of the distribution ranges of these mosquito species in 2011 (Tsuda et al, 2012;Watanabe et al, 2012;Tsuda and Kim, 2013). The adult mosquito density in 2012 was lower than that in 2011; however, Cx.…”