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The effects of climate change and globalization on mosquito vectors: evidence from Jeju Island, South Korea on the potential for Asian tiger mosquito (Aedes albopictus) influxes and survival from Vietnam rather than Japan.

Lee SH, Nam KW, Jeong JY, Yoo SJ, Koh YS, Lee S, Heo ST, Seong SY, Lee KH - PLoS ONE (2013)

Bottom Line: We found a significant association between the mean temperature, amount of precipitation, and density of mosquitoes.The phylogenetic analyses show that an Ae. albopictus, collected in southern area of Jeju Island, was identical to specimens found in Ho Chi Minh, Vietnam, and not Nagasaki, Japan.Therefore, Jeju Island is no longer safe from vector borne diseases (VBDs) due to the effects of globalization and climate change, and we should immediately monitor regional climate change to identify newly emerging VBDs.

View Article: PubMed Central - PubMed

Affiliation: Jeju National University School of Medicine, Jeju, South Korea.

ABSTRACT

Background: Climate change affects the survival and transmission of arthropod vectors as well as the development rates of vector-borne pathogens. Increased international travel is also an important factor in the spread of vector-borne diseases (VBDs) such as dengue, West Nile, yellow fever, chikungunya, and malaria. Dengue is the most important vector-borne viral disease. An estimated 2.5 billion people are at risk of infection in the world and there are approximately 50 million dengue infections and an estimated 500,000 individuals are hospitalized with dengue haemorrhagic fever annually. The Asian tiger mosquito (Aedes albopictus) is one of the vectors of dengue virus, and populations already exist on Jeju Island, South Korea. Currently, colder winter temperatures kill off Asian tiger mosquito populations and there is no evidence of the mosquitos being vectors for the dengue virus in this location. However, dengue virus-bearing mosquito vectors can inflow to Jeju Island from endemic area such as Vietnam by increased international travel, and this mosquito vector's survival during colder winter months will likely occur due to the effects of climate change.

Methods and results: In this section, we show the geographical distribution of medically important mosquito vectors such as Ae. albopictus, a vector of both dengue and chikungunya viruses; Culex pipiens, a vector of West Nile virus; and Anopheles sinensis, a vector of Plasmodium vivax, within Jeju Island, South Korea. We found a significant association between the mean temperature, amount of precipitation, and density of mosquitoes. The phylogenetic analyses show that an Ae. albopictus, collected in southern area of Jeju Island, was identical to specimens found in Ho Chi Minh, Vietnam, and not Nagasaki, Japan.

Conclusion: Our results suggest that mosquito vectors or virus-bearing vectors can transmit from epidemic regions of Southeast Asia to Jeju Island and can survive during colder winter months. Therefore, Jeju Island is no longer safe from vector borne diseases (VBDs) due to the effects of globalization and climate change, and we should immediately monitor regional climate change to identify newly emerging VBDs.

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Related in: MedlinePlus

Total abundance of females of An.sinensis Total abundance of females of An. sinensis at the sampling sites on Jeju Island (A) and monthly abundances of females of An. sinensis to the northern and southern areas of Jeju Island (B).
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pone-0068512-g004: Total abundance of females of An.sinensis Total abundance of females of An. sinensis at the sampling sites on Jeju Island (A) and monthly abundances of females of An. sinensis to the northern and southern areas of Jeju Island (B).

Mentions: Unlike Ae. albopictus and Cx. pipiens, An. sinensis were collected at influx areas such as Jeju seaport and international airport and in an urban area such as Seogwipo-city Public Health Center. This was an unexpected result because An. sinensis is usually found in forested areas and not urban areas (Figure 4A). In Jeju-city, An. sinensis appeared in July and its number increased markedly for one month and then decreased from September to October. However, its total count was lower than that of the other mosquito species. In Seogwipo-city, An. sinensis appeared in June; a month earlier than in Jeju-city, reached its highest number in September, and disappeared in November (Figure 4B).


The effects of climate change and globalization on mosquito vectors: evidence from Jeju Island, South Korea on the potential for Asian tiger mosquito (Aedes albopictus) influxes and survival from Vietnam rather than Japan.

Lee SH, Nam KW, Jeong JY, Yoo SJ, Koh YS, Lee S, Heo ST, Seong SY, Lee KH - PLoS ONE (2013)

Total abundance of females of An.sinensis Total abundance of females of An. sinensis at the sampling sites on Jeju Island (A) and monthly abundances of females of An. sinensis to the northern and southern areas of Jeju Island (B).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3722226&req=5

pone-0068512-g004: Total abundance of females of An.sinensis Total abundance of females of An. sinensis at the sampling sites on Jeju Island (A) and monthly abundances of females of An. sinensis to the northern and southern areas of Jeju Island (B).
Mentions: Unlike Ae. albopictus and Cx. pipiens, An. sinensis were collected at influx areas such as Jeju seaport and international airport and in an urban area such as Seogwipo-city Public Health Center. This was an unexpected result because An. sinensis is usually found in forested areas and not urban areas (Figure 4A). In Jeju-city, An. sinensis appeared in July and its number increased markedly for one month and then decreased from September to October. However, its total count was lower than that of the other mosquito species. In Seogwipo-city, An. sinensis appeared in June; a month earlier than in Jeju-city, reached its highest number in September, and disappeared in November (Figure 4B).

Bottom Line: We found a significant association between the mean temperature, amount of precipitation, and density of mosquitoes.The phylogenetic analyses show that an Ae. albopictus, collected in southern area of Jeju Island, was identical to specimens found in Ho Chi Minh, Vietnam, and not Nagasaki, Japan.Therefore, Jeju Island is no longer safe from vector borne diseases (VBDs) due to the effects of globalization and climate change, and we should immediately monitor regional climate change to identify newly emerging VBDs.

View Article: PubMed Central - PubMed

Affiliation: Jeju National University School of Medicine, Jeju, South Korea.

ABSTRACT

Background: Climate change affects the survival and transmission of arthropod vectors as well as the development rates of vector-borne pathogens. Increased international travel is also an important factor in the spread of vector-borne diseases (VBDs) such as dengue, West Nile, yellow fever, chikungunya, and malaria. Dengue is the most important vector-borne viral disease. An estimated 2.5 billion people are at risk of infection in the world and there are approximately 50 million dengue infections and an estimated 500,000 individuals are hospitalized with dengue haemorrhagic fever annually. The Asian tiger mosquito (Aedes albopictus) is one of the vectors of dengue virus, and populations already exist on Jeju Island, South Korea. Currently, colder winter temperatures kill off Asian tiger mosquito populations and there is no evidence of the mosquitos being vectors for the dengue virus in this location. However, dengue virus-bearing mosquito vectors can inflow to Jeju Island from endemic area such as Vietnam by increased international travel, and this mosquito vector's survival during colder winter months will likely occur due to the effects of climate change.

Methods and results: In this section, we show the geographical distribution of medically important mosquito vectors such as Ae. albopictus, a vector of both dengue and chikungunya viruses; Culex pipiens, a vector of West Nile virus; and Anopheles sinensis, a vector of Plasmodium vivax, within Jeju Island, South Korea. We found a significant association between the mean temperature, amount of precipitation, and density of mosquitoes. The phylogenetic analyses show that an Ae. albopictus, collected in southern area of Jeju Island, was identical to specimens found in Ho Chi Minh, Vietnam, and not Nagasaki, Japan.

Conclusion: Our results suggest that mosquito vectors or virus-bearing vectors can transmit from epidemic regions of Southeast Asia to Jeju Island and can survive during colder winter months. Therefore, Jeju Island is no longer safe from vector borne diseases (VBDs) due to the effects of globalization and climate change, and we should immediately monitor regional climate change to identify newly emerging VBDs.

Show MeSH
Related in: MedlinePlus