・食品媒介感染症原因菌（腸管出血性大腸菌やリステリア等）に関する分子疫学研究
・院内感染症起因菌（緑膿菌等）に関する分子疫学研究
・環境AMRに関する研究

・Baba H, Sato Y, Toyonaga Y, Hanaki H, Sunakawa K. Nationwide survey of the development of drug resistance in the pediatric field in 2007, 2010, and 2012: drug sensitivity of Haemophilus influenzae serotype b strain in Japan. J Infect Chemother. 2015;21:277-83.
・Baba H, Kakuta R, Tomita H, Miyazoe M, Saito M, Oe C, Ishibashi N, Sogi M, Oshima K, Aoyagi T, Gu Y, Yoshida M, Tokuda K, Endo S, Yano H, Kaku M. The first case report of septic abortion resulting from β-lactamase-negative ampicillin-resistant non-typeable Haemophilus influenzae infection. JMM Case Rep. 2017;4:e005123.
・Baba H, Kanamori H. Are reservoirs and transmission routes the same or different between O157 and non-O157 Shiga toxin-producing Escherichia coli? Clin Infect Dis. 2019;pii: ciz1111.
・Baba H, Kanamori H, Kudo H, Kuroki Y, Higashi S, Oka K, Takahashi M, Yoshida M, Oshima K, Aoyagi T, Tokuda K, Kaku M. Genomic analysis of Shiga toxin-producing Escherichia coli from patients and asymptomatic food handlers in Japan. PLOS ONE. 2019;14:e0225340.
・Baba H, Kanamori H, Oshima K, Seike I, Niitsuma-Sugaya I, Takei K, Sato Y, Tokuda K, Aoyagi T. Prolonged presence of SARS-CoV-2 in a COVID-19 case with rheumatoid arthritis taking iguratimod treated with ciclesonide. J Infect Chemother. 2020;26:1100-3. https://doi.org/10.1016/j.jiac.2020.06.022
・Baba H, Kanamori H, Kakuta R, Sakurai H, Oshima K, Aoyagi T, Kaku M. Genomic characteristics of Listeria monocytogenes causing invasive listeriosis in Japan. Diagn Microbiol Infect Dis. 2021;99:115233.
・Baba H, Kanamori H, Katsumi M, Sato T, Chida T, Ikeda S, Suzuki Y, Yano H, Tokuda K. A case of meningitis due to extensively drug-resistant Pseudomonas aeruginosa imported through medical evacuation: Genomic and environmental investigation. J Travel Med. 2021:taab047. doi: 10.1093/jtm/taab047.