Journal of infection and chemotherapy : official journal of the Japan Society of Chemotherapy · 2026
Epidemiology and clinical characteristics of hospitalized patients with echinococcosis in Japan: A nationwide administrative database study.
СтатьяНазвание и аннотация: Перевод в очереди
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Nakamura Kei, Ohkubo Naoaki, Yamasaki Kei, Tahara Masahiro, Akata Kentaro, Ikegami Hiroaki, Nishida Chinatsu, Okawara Makoto, Fujino Yoshihisa, Matsuda Shinya, Fushimi Kiyohide, Mukae Hiroshi, Yatera Kazuhiro
Аннотация
BACKGROUND: Echinococcosis is a rare but potentially life-threatening parasitic disease caused by Echinococcus species. In Japan, epidemiological data are mainly derived from notification-based surveillance, and large-scale nationwide analyses focusing on hospitalized patients remain limited. This study aimed to clarify the nationwide epidemiology and clinical characteristics of hospitalized patients with echinococcosis in Japan using an administrative database.
METHODS: We conducted a retrospective nationwide study using the Japanese Diagnosis Procedure Combination database. Hospitalized patients diagnosed with echinococcosis between April 1, 2014, and March 31, 2021, were identified. Data on age, sex, geographic distribution, affected organs, comorbidities, treatments, Japan Coma Scale score, and length of hospital stay were extracted and analyzed.
RESULTS: A total of 170 hospitalized patients coded for echinococcosis were included after exclusion of duplicate cases. The median age was 65.5 years, and 51% were male. Hepatic involvement was observed in 90% of patients, followed by pulmonary (4%), cutaneous (2%), cerebral (2%), and osseous (2%) involvement. Surgical treatment was frequently performed, including hepatectomy in 48% and cholecystectomy in 24% of patients, while albendazole therapy was administered in 21%. Most patients were from the Hokkaido region (85%), followed by the Kanto region (8%). The average annual number of hospitalized patients was approximately 24.
CONCLUSION: Echinococcosis remains a clinically relevant parasitic disease in Japan, particularly in Hokkaido, and often requires hospitalization and surgical intervention. Nationwide administrative data provide valuable insights into the real-world clinical burden of echinococcosis.
METHODS: We conducted a retrospective nationwide study using the Japanese Diagnosis Procedure Combination database. Hospitalized patients diagnosed with echinococcosis between April 1, 2014, and March 31, 2021, were identified. Data on age, sex, geographic distribution, affected organs, comorbidities, treatments, Japan Coma Scale score, and length of hospital stay were extracted and analyzed.
RESULTS: A total of 170 hospitalized patients coded for echinococcosis were included after exclusion of duplicate cases. The median age was 65.5 years, and 51% were male. Hepatic involvement was observed in 90% of patients, followed by pulmonary (4%), cutaneous (2%), cerebral (2%), and osseous (2%) involvement. Surgical treatment was frequently performed, including hepatectomy in 48% and cholecystectomy in 24% of patients, while albendazole therapy was administered in 21%. Most patients were from the Hokkaido region (85%), followed by the Kanto region (8%). The average annual number of hospitalized patients was approximately 24.
CONCLUSION: Echinococcosis remains a clinically relevant parasitic disease in Japan, particularly in Hokkaido, and often requires hospitalization and surgical intervention. Nationwide administrative data provide valuable insights into the real-world clinical burden of echinococcosis.