Associate professor Michiko Toizumi

Speciality / Research theme / Keywords
Paediatrics, Neonatology, Epidemiology, Public Health, Virology
Masters ProgrammeDoctoral Programme


  • MD
  • MTM
  • PhD

Personal/work Web page addresses



Department of Pediatric Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Nagasaki University


I graduated from Kumamoto University Medical School, Japan and then had worked as a pediatrician for 8 years. Following that, I had studied tropical medicine and pediatric infectious diseases in the Master course of Tropical Medicine and in the Doctoral course in Graduate School of Biomedical Sciences, Nagasaki University. After I received my PhD, I joined the Department of Pediatric Infectious Diseases, the Institute of Tropical Medicine, Nagasaki University as an assistant professor in 2015.


Facilitator of Epidemiology-Statistics Course in School of Tropical Medicine and Global Health, Nagasaki University


Studies on pediatric infectious diseases in Vietnam:

Acute respiratory infections (incidence, viral/bacterial pathogens, risk factors)

Congenital infections (e.g.,rubella, CMV, Zika) and the effect on child development

Pneumococcal conjugate vaccine reduced dosing trial

The country/countries where you work currently


Five MOST IMPORTANT/INTERESTING recent publications

  1. Kitamura N, Hoan TT,  Do HM, Dao TA, Le LT, Le TTT, Doan TTT, Chau TN, Dinh HT, Iwaki M, Senoh M, Efstraciou A, Ho NM, Pham DM, Dang DA, Toizumi M, Fine P, Do HT, Yoshida LM. Seroepidemiology and Carriage of Diphtheria in Epidemic-Prone Area and Implications for Vaccination Policy, Vietnam. Emerging infectious diseases. 2023; 29(1):70-80.
  2. Toizumi M,  Satoh C, Quilty BJ, Nguyen HAT, Madaniyazi L, Le LT, Ng CFS, Hara M, Iwasaki C, Takegata M, Kitamura N, Nation ML, Satzke C, Kumai Y, Do HT, Bui MX, Mulholland K,  Flasche S, Dang DA, Kaneko K, Yoshida LM. Effect of pneumococcal conjugate vaccine on prevalence of otitis media with effusion among children in Vietnam. Vaccine. 2022; 40(36) 5366-5375.
  3. Qian G, Toizumi M, Clifford S, Le LT, Papastylianou T, Satzke C, Quilty B, Iwasaki C, Kitamura N, Takegata M, Bui MX, Nguyen HAT, Dang DA, van Hoek AJ, Yoshida LM, Flasche S. Association of pneumococcal carriage in infants with the risk of carriage among their contacts in Nha Trang, Vietnam: A nested cross-sectional survey. PLoS medicine. 2022; 19(5):e1004016.
  4. Toizumi M, Horikoshi Y. Imported Infectious Diseases, Tropical Diseases and Local Endemic Infectious Diseases in Japan. The Pediatric infectious disease journal. 2022; 41(7):e275-e282.
  5. Toizumi M, Vo HM, Dang DA, Moriuchi H, Yoshida LM. Clinical manifestations of congenital rubella syndrome: A review of our experience in Vietnam. Vaccine. 2019; 37(1) 202-209.


Please join us if you are interested in our researches on pediatric infectious diseases!