Publication: Bacterial Endocarditis Caused by Actinomyces oris: First Reported Case and Literature Review
Issued Date
2020-01-01
Resource Type
ISSN
23247096
Other identifier(s)
2-s2.0-85081380280
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Journal of Investigative Medicine High Impact Case Reports. Vol.8, (2020)
Suggested Citation
Chanita Phichaphop, Nopporn Apiwattanakul, Suthep Wanitkun, Sophida Boonsathorn Bacterial Endocarditis Caused by Actinomyces oris: First Reported Case and Literature Review. Journal of Investigative Medicine High Impact Case Reports. Vol.8, (2020). doi:10.1177/2324709620910645 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/53673
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Bacterial Endocarditis Caused by Actinomyces oris: First Reported Case and Literature Review
Other Contributor(s)
Abstract
© 2020 American Federation for Medical Research. Actinomyces species are gram-positive, facultative anaerobic bacilli. Infection caused by Actinomyces species is usually limited to cervicofacial, thoracic, and abdominopelvic regions. Infective endocarditis due to Actinomyces species is extremely rare with only 30 reported cases since 1939. We report a case of Actinomyces oris endocarditis in a 14-year-old boy who had a 2-week history of dyspnea on exertion without other constitutional signs. Transthoracic echocardiography was suggestive of perforation of the right coronary cusp of aortic valve. No organisms were isolated from blood cultures. The patient underwent surgical valve repair due to deteriorated cardiac function. Valve tissue culture did not initially identify the organism. However, the terminal subculture in a thioglycolate broth grew gram-positive bacilli. The matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) was compatible with Actinomyces oris. After 6 weeks of intravenous ampicillin, the patient remained well with improved cardiac function. We reviewed all reported cases of infective endocarditis caused by Actinomyces species, commenting on clinical characteristics and factors associated with unfavorable outcomes in infective endocarditis due to Actinomyces species. Although infective endocarditis caused by Actinomyces spp is rare, it could be considered in a case of culture-negative endocarditis since the clinical features might be indistinguishable from other bacterial endocarditis. Additionally, MALDI-TOF MS is a useful diagnostic tool for the identification of Actinomyces spp to improve the accuracy of diagnosis.