A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an Adult

A 19-year-old woman was referred to our hospital because of a persistent fever and cough that lasted for over a week. Influenza B virus infection was diagnosed using the rapid test kit. Initially, the patient was diagnosed with influenza B infection associated with lobar pneumonia and treated with a...

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Main Authors: Taro Shinozaki, Kotaro Sasahara, Eri Iwami, Aoi Kuroda, Tatsu Matsuzaki, Takahiro Nakajima, Takeshi Terashima
Format: Article
Language:English
Published: Wiley 2018-01-01
Series:Case Reports in Infectious Diseases
Online Access:http://dx.doi.org/10.1155/2018/3529358
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author Taro Shinozaki
Kotaro Sasahara
Eri Iwami
Aoi Kuroda
Tatsu Matsuzaki
Takahiro Nakajima
Takeshi Terashima
author_facet Taro Shinozaki
Kotaro Sasahara
Eri Iwami
Aoi Kuroda
Tatsu Matsuzaki
Takahiro Nakajima
Takeshi Terashima
author_sort Taro Shinozaki
collection DOAJ
description A 19-year-old woman was referred to our hospital because of a persistent fever and cough that lasted for over a week. Influenza B virus infection was diagnosed using the rapid test kit. Initially, the patient was diagnosed with influenza B infection associated with lobar pneumonia and treated with an anti-influenza virus drug and sulbactam/ampicillin. The patient’s fever persisted, and her respiratory condition worsened. On day 5, a computed tomography (CT) scan revealed an extension of the consolidation areas in the left lung and new opacities in the right lung. The antibiotic treatment was changed to meropenem and levofloxacin, and the patient’s physical condition gradually improved. A sputum sample revealed the presence of Mycoplasma pneumoniae-specific DNA. Both influenza B virus and M. pneumoniae infections were confirmed serologically. This was a case of coinfection with influenza B virus and M. pneumoniae in a healthy young woman. The M. pneumoniae pneumonia diagnosis was delayed because the predominant feature observed in the CT scan was dense consolidation. M. pneumoniae should be considered as one of the causative pathogens in influenza coinfection cases with CT scan images presenting dense consolidation.
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spelling doaj-art-5bd80d7484d7442db765a70328e64db32025-02-03T01:11:30ZengWileyCase Reports in Infectious Diseases2090-66252090-66332018-01-01201810.1155/2018/35293583529358A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an AdultTaro Shinozaki0Kotaro Sasahara1Eri Iwami2Aoi Kuroda3Tatsu Matsuzaki4Takahiro Nakajima5Takeshi Terashima6Department of Respiratory Medicine, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-0824, JapanDepartment of Respiratory Medicine, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-0824, JapanDepartment of Respiratory Medicine, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-0824, JapanDepartment of Respiratory Medicine, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-0824, JapanDepartment of Respiratory Medicine, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-0824, JapanDepartment of Respiratory Medicine, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-0824, JapanDepartment of Respiratory Medicine, Tokyo Dental College Ichikawa General Hospital, 5-11-13, Sugano, Ichikawa, Chiba 272-0824, JapanA 19-year-old woman was referred to our hospital because of a persistent fever and cough that lasted for over a week. Influenza B virus infection was diagnosed using the rapid test kit. Initially, the patient was diagnosed with influenza B infection associated with lobar pneumonia and treated with an anti-influenza virus drug and sulbactam/ampicillin. The patient’s fever persisted, and her respiratory condition worsened. On day 5, a computed tomography (CT) scan revealed an extension of the consolidation areas in the left lung and new opacities in the right lung. The antibiotic treatment was changed to meropenem and levofloxacin, and the patient’s physical condition gradually improved. A sputum sample revealed the presence of Mycoplasma pneumoniae-specific DNA. Both influenza B virus and M. pneumoniae infections were confirmed serologically. This was a case of coinfection with influenza B virus and M. pneumoniae in a healthy young woman. The M. pneumoniae pneumonia diagnosis was delayed because the predominant feature observed in the CT scan was dense consolidation. M. pneumoniae should be considered as one of the causative pathogens in influenza coinfection cases with CT scan images presenting dense consolidation.http://dx.doi.org/10.1155/2018/3529358
spellingShingle Taro Shinozaki
Kotaro Sasahara
Eri Iwami
Aoi Kuroda
Tatsu Matsuzaki
Takahiro Nakajima
Takeshi Terashima
A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an Adult
Case Reports in Infectious Diseases
title A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an Adult
title_full A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an Adult
title_fullStr A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an Adult
title_full_unstemmed A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an Adult
title_short A Case of Influenza B and Mycoplasma pneumoniae Coinfection in an Adult
title_sort case of influenza b and mycoplasma pneumoniae coinfection in an adult
url http://dx.doi.org/10.1155/2018/3529358
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