Scrub Typhus and Influenza A Co-Infection: A Case Report

Scrub typhus, caused by <i>Orientia tsutsugamushi</i>, is a neglected and reemerging disease that causes considerable morbidity and mortality. It now extends beyond the Tsutsugamushi Triangle, the region wherein it has traditionally been endemic. Influenza has also resurged since the inf...

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Main Authors: Chie Yamamoto, Ayano Maruyama, Jun Munakata, Tasuku Matsuyama, Keitaro Furukawa, Ryosuke Hamashima, Motohiko Ogawa, Yuki Hashimoto, Akiko Fukuda, Tohru Inaba, Yoko Nukui
Format: Article
Language:English
Published: MDPI AG 2025-01-01
Series:Pathogens
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Online Access:https://www.mdpi.com/2076-0817/14/1/64
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author Chie Yamamoto
Ayano Maruyama
Jun Munakata
Tasuku Matsuyama
Keitaro Furukawa
Ryosuke Hamashima
Motohiko Ogawa
Yuki Hashimoto
Akiko Fukuda
Tohru Inaba
Yoko Nukui
author_facet Chie Yamamoto
Ayano Maruyama
Jun Munakata
Tasuku Matsuyama
Keitaro Furukawa
Ryosuke Hamashima
Motohiko Ogawa
Yuki Hashimoto
Akiko Fukuda
Tohru Inaba
Yoko Nukui
author_sort Chie Yamamoto
collection DOAJ
description Scrub typhus, caused by <i>Orientia tsutsugamushi</i>, is a neglected and reemerging disease that causes considerable morbidity and mortality. It now extends beyond the Tsutsugamushi Triangle, the region wherein it has traditionally been endemic. Influenza has also resurged since the infection control measures against COVID-19 were relaxed. A few cases of scrub typhus and influenza co-infection have been reported. Herein, we report the case of a 74-year-old woman with fever and upper respiratory symptoms diagnosed with influenza A and treated with oseltamivir; however, her fever persisted, and she developed respiratory failure, liver dysfunction, headache, diarrhea, and an erythematous skin rash. She lived in a forested area where scrub typhus was endemic and worked on a farm. Physical examination revealed an eschar on her posterior neck, and she was diagnosed with scrub typhus and influenza A co-infection. After minocycline treatment, her symptoms improved within a few days. This is the first reported case of scrub typhus and influenza A co-infection in Japan. This case illustrates that co-infection should be suspected in patients with fever persisting after their initial infection has been treated and that in patients living in endemic areas, scrub typhus can occur concurrently with influenza. The symptoms of scrub typhus are flu-like and nonspecific, which may delay diagnosis and treatment.
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spelling doaj-art-060f42e4b67c4f9d845a2202390a1a042025-01-24T13:44:46ZengMDPI AGPathogens2076-08172025-01-011416410.3390/pathogens14010064Scrub Typhus and Influenza A Co-Infection: A Case ReportChie Yamamoto0Ayano Maruyama1Jun Munakata2Tasuku Matsuyama3Keitaro Furukawa4Ryosuke Hamashima5Motohiko Ogawa6Yuki Hashimoto7Akiko Fukuda8Tohru Inaba9Yoko Nukui10Department of Infection Control and Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanDepartment of Dermatology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanDepartment of Cardiovascular Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanDepartment of Emergency Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanDepartment of Infection Control and Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanDepartment of Infection Control and Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanDepartment of Virology 1, National Institute of Infectious Diseases, Tokyo 162-8640, JapanDepartment of Virology 1, National Institute of Infectious Diseases, Tokyo 162-8640, JapanDepartment of Virology 1, National Institute of Infectious Diseases, Tokyo 162-8640, JapanDepartment of Infection Control and Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanDepartment of Infection Control and Laboratory Medicine, Kyoto Prefectural University of Medicine, Kyoto 602-8566, JapanScrub typhus, caused by <i>Orientia tsutsugamushi</i>, is a neglected and reemerging disease that causes considerable morbidity and mortality. It now extends beyond the Tsutsugamushi Triangle, the region wherein it has traditionally been endemic. Influenza has also resurged since the infection control measures against COVID-19 were relaxed. A few cases of scrub typhus and influenza co-infection have been reported. Herein, we report the case of a 74-year-old woman with fever and upper respiratory symptoms diagnosed with influenza A and treated with oseltamivir; however, her fever persisted, and she developed respiratory failure, liver dysfunction, headache, diarrhea, and an erythematous skin rash. She lived in a forested area where scrub typhus was endemic and worked on a farm. Physical examination revealed an eschar on her posterior neck, and she was diagnosed with scrub typhus and influenza A co-infection. After minocycline treatment, her symptoms improved within a few days. This is the first reported case of scrub typhus and influenza A co-infection in Japan. This case illustrates that co-infection should be suspected in patients with fever persisting after their initial infection has been treated and that in patients living in endemic areas, scrub typhus can occur concurrently with influenza. The symptoms of scrub typhus are flu-like and nonspecific, which may delay diagnosis and treatment.https://www.mdpi.com/2076-0817/14/1/64co-infectioninfluenza Ascrub typhus
spellingShingle Chie Yamamoto
Ayano Maruyama
Jun Munakata
Tasuku Matsuyama
Keitaro Furukawa
Ryosuke Hamashima
Motohiko Ogawa
Yuki Hashimoto
Akiko Fukuda
Tohru Inaba
Yoko Nukui
Scrub Typhus and Influenza A Co-Infection: A Case Report
Pathogens
co-infection
influenza A
scrub typhus
title Scrub Typhus and Influenza A Co-Infection: A Case Report
title_full Scrub Typhus and Influenza A Co-Infection: A Case Report
title_fullStr Scrub Typhus and Influenza A Co-Infection: A Case Report
title_full_unstemmed Scrub Typhus and Influenza A Co-Infection: A Case Report
title_short Scrub Typhus and Influenza A Co-Infection: A Case Report
title_sort scrub typhus and influenza a co infection a case report
topic co-infection
influenza A
scrub typhus
url https://www.mdpi.com/2076-0817/14/1/64
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