The fields of study he is best known for:

• Virus
• Gene
• Ecology

His scientific interests lie mostly in Ehrlichia, Virology, Zoology, Anaplasma and Microbiology. His Ehrlichia study is related to the wider topic of Tick. The Virology study combines topics in areas such as Rickettsiales and Ehrlichiaceae.

The concepts of his Zoology study are interwoven with issues in Potomac Horse Fever, Neorickettsia, Neorickettsia risticii and Ecology. His study focuses on the intersection of Anaplasma and fields such as Apodemus agrarius with connections in the field of Bartonella Infection, Shrew and Vole. His Microbiology study combines topics in areas such as Methicillin-resistant Staphylococcus aureus and Virulence.

His primary scientific interests are in Virology, Veterinary medicine, Zoology, Ehrlichia and Tick. His Virology research is multidisciplinary, incorporating elements of Gene and Polymerase chain reaction. While the research belongs to areas of Veterinary medicine, Joon-Seok Chae spends his time largely on the problem of Grazing, intersecting his research to questions surrounding Theileria orientalis.

His Zoology research is multidisciplinary, incorporating perspectives in 18S ribosomal RNA, Host and Anatomy. His Ehrlichia research is multidisciplinary, relying on both Nested polymerase chain reaction, Microbiology and Anaplasma. His biological study deals with issues like Helminths, which deal with fields such as Intermediate host