Wolbachia is intra-cellular bacteria and frustrate host biology, such as parthenogenesis, feminization, male killing andsperm-egg incompatibility. It has been reported that > 90% of Aedes albopictus are infected with Wolbachia in the Republicof Korea (ROK). However any roles of the Wolbachia strains have not been reported in ROK. In this study, we infectedWolbachia to Vero cell line to investigate the cell migration which is related with the development of multi-cellular organisms,immune response and inflammation. Changes of wound healing and viability in vero cell after Wolbachia infection wereassessed. Cell migration was induced by Wolbachia after 24hr. Cell viability was not affected by Wolbachia after 24hr.This study will be helpful to understand the role of Wolbachia strain and support various information in Dengue andZika vector management programs.

The activities of three class, five acaricides (Permethrin, Deltamethrin, Fenitrothion, Chlorpyrifos, Imidacloprid) againstHaemaphysalis longicornis nymph, a major vector for Severe Fever with Thrombo cytopenia Syndrome (SFTS) and Lymedisease. The ticks distribute at vast open fields and various kind of habitats. Five acaricides were applied to ticks collectedform four areas(Gapyeong, Paju, Chuncheon, Wonju) to confirm the effect of acaricide. This areas was the area whereSFTS disease occurred and a large nember of ticks were collected. As a result, All areas is the most acaricidal effectto Deltamethrin. And two areas(Gapyeong, Paju) has the lowest acaricidal effect to Imidacloprid and two area(Chuncheon,Wonju) has the lowest acaricidal effect to Permethrin. Futher study will need to compare the acaricidal efficacy of theremaining seven province.

Aedes albopictus (Skuse) has been involved as the potential vector of imported zika virus disease and dengue fever throughout Republic of Korea. It has been reported that the successful introduction of a life-shortening strain of Wolbachia into Ae. albopictus halves adult lifespan and also directly inhibits the ability of a range of pathogens to infect this mosquito species. In our previous studies, Ae. albopictus collected from field was naturally infected by two strains of Wolbachia (wAlbA and wAlbB). However, virus regulation of two Wolbachia strains in Ae. albopictus have not been assessed, yet. In our studies, the two Wolbachia strains in about 20% among Ae. albopictus were removed for the virus regulation test using tetracycline. In this presentation, the detailed results and methods are introduced.