Open AccessBacteremia Caused by Both Legionella pneumophila Serogroup 2 and Helicobacter cinaedi
Author(s) -
Taiga Nagase,
Shun Wada,
Takayuki Yokozawa,
Akira Fujita,
Toshimi Oda
Publication year - 2021
Publication title -
jma journal
Language(s) - English
Resource type - Journals
eISSN - 2433-3298
pISSN - 2433-328X
DOI - 10.31662/jmaj.2021-0016
Subject(s) - legionella pneumophila , microbiology and biotechnology , bacteremia , pneumonia , legionella , sputum , serology , blood culture , medicine , biology , immunology , tuberculosis , bacteria , pathology , antibody , genetics , antibiotics
A 74-year-old woman with a history of pure red cell aplasia and hypogammaglobulinemia developed pneumonia. A urine antigen test and sputum subculture on buffered charcoal yeast extract (BCYE)α agar were positive for Legionella pneumophila . Serological testing identified L. pneumophila serogroup 2. An aerobic blood culture also became positive on day 5; its subculture on BCYEα agar revealed the same pathogen, but that on blood agar revealed Helicobacter cinaedi . We thus diagnosed her with bacteremia caused by both pathogens. Hence, in cases of H. cinaedi bacteremia along with pneumonia, the screening of other pathogens including L. pneumophila is needed.