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Insecticide resistance and cytochrome-P450 activation in unfed and blood-fed laboratory and field populations of Culex pipiens pallens

Understanding the mechanisms of insecticide resistance to vector mosquitoes is critical for the implementation of effective control measures. A nulliparous susceptible Culex pipiens pallens (KSCP) laboratory colony and two field strains from Paju (PAJ) and Jeonju (JEO) Korea were evaluated for susceptibility to five pesticides by microapplication techniques. Unfed PAJ and JEO...

Insecticide resistance and cytochrome-P450 activation in unfed and blood-fed laboratory and field populations of Culex pipiens pallens

Understanding the mechanisms of insecticide resistance to vector mosquitoes is critical for the implementation of effective control measures. A nulliparous susceptible Culex pipiens pallens (KSCP) laboratory colony and two field strains from Paju (PAJ) and Jeonju (JEO) Korea were evaluated for susceptibility to five pesticides by microapplication techniques. Unfed PAJ and JEO...

Molecular characterization of novel mosquito-borne Rickettsia spp. from mosquitoes collected at the Demilitarized Zone of the Republic of Korea

. Maina, Richard G. Jarman, Jun Hang, Allen L. Richards. Data curation: Terry A. Klein, Heung-Chul Kim, Sung-Tae Chong, Yu Yang. Formal analysis: Alice N. Maina, Yu Yang, Jun Hang. Funding acquisition ... : Terry A. Klein, Richard G. Jarman, Allen L. Richards. Investigation: Alice N. Maina, Sung-Tae Chong, Yu Yang, Kristin Mullins. Methodology: Alice N. Maina, Yu Yang, Kristin Mullins, Ju Jiang. Project

Hantavirus surveillance and genetic diversity targeting small mammals at Camp Humphreys, a US military installation and new expansion site, Republic of Korea

Small mammal surveillance was conducted (2008–2010, 2012) at Camp (Cp) Humphreys, a US Army installation and new expansion site, Republic of Korea (ROK), to identify hemorrhagic fever with renal syndrome health threats to US military/civilian populations during its ongoing expansion phase. Small mammals were collected using Sherman live capture traps and transported to Korea...

Dynamic Circulation and Genetic Exchange of a Shrew-borne Hantavirus, Imjin virus, in the Republic of Korea

Terry A. Klein Man-Seong Park Jin-Won Song OPEN Hantaviruses (family Bunyaviridae) are enveloped negative-sense tripartite RNA viruses. The natural hosts of hantaviruses include rodents, shrews, moles

Hantaan Virus Surveillance Targeting Small Mammals at Nightmare Range, a High Elevation Military Training Area, Gyeonggi Province, Republic of Korea

Rodent-borne disease surveillance was conducted at Nightmare Range (NM-R), near the demilitarized zone in northeast Gyeonggi Province, Republic of Korea, to identify hemorrhagic fever with renal syndrome (HFRS) risks for a mountainous high-elevation (500 m) military training site. Monthly surveys were conducted from January 2008-December 2009. A total of 1,720 small mammals were...

Ecological Niche Modeling to Estimate the Distribution of Japanese Encephalitis Virus in Asia

Background Culex tritaeniorhynchus is the primary vector of Japanese encephalitis virus (JEV), a leading cause of encephalitis in Asia. JEV is transmitted in an enzootic cycle involving large wading birds as the reservoirs and swine as amplifying hosts. The development of a JEV vaccine reduced the number of JE cases in regions with comprehensive childhood vaccination programs...

Emergence of Japanese encephalitis virus genotype V in the Republic of Korea

Background Japanese encephalitis virus (JEV) genotype V reemerged in Asia (China) in 2009 after a 57-year hiatus from the continent, thereby emphasizing a need to increase regional surveillance efforts. Genotypic characterization was performed on 19 JEV-positive mosquito pools (18 pools of Culex tritaeniorhynchus and 1 pool of Cx. bitaeniorhynchus) from a total of 64 positive...

Molecular Detection and Genotyping of Japanese Encephalitis Virus in Mosquitoes during a 2010 Outbreak in the Republic of Korea

Japanese encephalitis virus (JEV), a mosquito-borne zoonotic pathogen, is one of the major causes of viral encephalitis. To reduce the impact of Japanese encephalitis among children in the Republic of Korea (ROK), the government established a mandatory vaccination program in 1967. Through the efforts of this program only 0–7 (mean 2.1) cases of Japanese encephalitis were reported...

The relationship between mosquito abundance and rice field density in the Republic of Korea

Background Japanese encephalitis virus (JEV), the causative agent of Japanese encephalitis (JE), is endemic to the Republic of Korea (ROK) where unvaccinated United States (U.S.) military Service members, civilians and family members are stationed. The primary vector of the JEV in the ROK is Culex tritaeniorhynchus. The ecological relationship between Culex spp. and rice fields...

Determinants of Anopheles Seasonal Distribution Patterns Across a Forest to Periurban Gradient near Iquitos, Peru

Research , Washington , District of Columbia 2 Authors' addresses: Drew D. Reinbold-Wasson, Michael R. Sardelis, James W. Jones, Terry A. Klein, and Michael J. Turell, Virology Division, US Army Medical

Genetic diversity of Imjin virus in the Ussuri white-toothed shrew (Crocidura lasiura) in the Republic of Korea, 2004-2010

Heung-Chul Kim Terry A Klein Richard Yanagihara Jin-Won Song 0 0 Department of Microbiology, College of Medicine, and Institute for Viral Diseases, Korea University , 5-ga, Anam-dong, Sungbuk-gu, Seoul

Species composition, larval habitats, seasonal occurrence and distribution of potential malaria vectors and associated species of Anopheles (Diptera: Culicidae) from the Republic of Korea

Background Larval mosquito habitats of potential malaria vectors and related species of Anopheles from three provinces (Gyeonggi, Gyeongsangbuk, Chungcheongbuk Provinces) of the Republic of Korea were surveyed in 2007. This study aimed to determine the species composition, seasonal occurrence and distributions of Anopheles mosquitoes. Satellite derived normalized difference...

Biological Resistance of Hydroxychloroquine for Plasmodium vivax Malaria in the Republic of Korea

The Republic of Korea (ROK) Army instituted a vivax malaria chemoprophylaxis program (hydroxychloroquine [HCQ] 400 mg per week) in 1997 that was expanded to nearly 200,000 soldiers by 2007, raising concerns for the emergence of drug-resistant vivax malaria. Therefore, a study of whole blood HCQ concentrations for all malaria patients admitted to four ROK Army hospitals was...

The AFHSC-Division of GEIS Operations Predictive Surveillance Program: a multidisciplinary approach for the early detection and response to disease outbreaks

Witt 0 Allen L Richards Penny M Masuoka Desmond H Foley Anna L Buczak Lillian A Musila Jason H Richardson Michelle G Colacicco-Mayhugh Leopoldo M Rueda Terry A Klein Assaf Anyamba Jennifer Small Julie A

A cost comparison of two malaria control methods in Kyunggi Province, Republic of Korea, using remote sensing and geographic information systems.

-542-4324; E-mail: . Penny M. Masuoka, Tomoko Hooper, Arthur Lee, and Richard D. Andre, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda MD 20814-4799. Terry A ... . Klein, Preventive Services Directorate, 18th Medical Command, Unit 15281, APO AP 96205-0054, Seoul, Republic of Korea.

Malaria and other vector-borne infection surveillance in the U.S. Department of Defense Armed Forces Health Surveillance Center-Global Emerging Infections Surveillance program: review of 2009 accomplishments

Mark M Fukuda 0 Terry A Klein 2 Tadeusz Kochel 1 Talia M Quandelacy 0 Bryan L Smith Jeff Villinski 5 Delia Bethell 6 Stuart Tyner 6 Youry Se 6 Chanthap Lon 6 David Saunders 6 Jacob Johnson 5 Eric

VIVAX MALARIA: A CONTINUING HEALTH THREAT TO THE REPUBLIC OF KOREA

Vivax malaria reemerged in the Republic of Korea in 1993. Most of the cases occurred among soldiers in the region adjacent to the Demilitarized Zone (DMZ) until 1995. To determine the rate of dispersion of vivax malaria, we evaluated its epidemiologic characteristics. Of 13,903 cases of vivax malaria reported in 2000, 40.1% (5,577) were reported among Republic of Korea military...