Actinomyces meyeri, a Common Agent of Actinomycosis.
Actinomyces meyeri has been rarely associated with actinomycosis—of 26 cases due to A. meyeri reviewed in the medical literature in 1996 3 and several subsequent case reports,8, 9, 10 most infections were reported in men with alcoholism, poor dentition and pulmonary manifestations, who frequently developed A. meyeri bacteremia.
Actinomyces meyeri is an uncommon cause of human actinomycosis. Here, we report a rare case of empyema caused by A. meyeri. A 49-year-old male presented with a history of 10 days of dyspnea and chest pain. A large amount of loculated pleural effusion was present on the right side and multiple lung nodules were documented on radiological studies.
Actinomyces is a genus of the Actinobacteria class of bacteria.They are all gram-positive. Actinomyces species are facultatively anaerobic (except A. meyeri and A. israelii both obligate anaerobe), and they grow best under anaerobic conditions. Actinomyces species may form endospores, and, while individual bacteria are rod-shaped, Actinomyces colonies form fungus-like branched networks of hyphae.
Apart from A. denticolens and A. howellii, whose pathogenic potentials have not been investigated so far, all of the other typical Actinomyces species may cause various forms of disease in man as well as in feral, domestic, and laboratory animals. Nevertheless, members of different species vary considerably with regard to virulence, types of pathological lesions induced and host specificity.
Actinomyces israelii is a species of Gram-positive, rod-shaped bacteria within the Actinomyces. Known to live commensally on and within humans, A. israelii is an opportunistic pathogen and a cause of actinomycosis. Many physiologically diverse strains of the species are known to exist, though not all are strict anaerobes.
Conclusion: This is the first case of pulmonary actinomycosis attributable to A. meyeri presenting as cardiac tamponade. We believe that an increased awareness of the disease is necessary to expedite diagnosis therefore minimizing morbidity and mortality. Keywords: Actinomyces meyeri, Cardiac tamponade, Lung abscess, Actinomycosis Background.
Actinomyces meyeri information including symptoms, causes, diseases, symptoms, treatments, and other medical and health issues.
These patients often present with symptoms of heart failure, but myocardial involvement is unusual. We present a unique case of pericarditis due to Actinomyces meyeri, resulting in tamponade and constriction requiring pericardial stripping, complicated by persistent left ventricular dysfunction.
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CaseReport Actinomyces meyeri Empyema: A Case Report and Review of the Literature HaeWonJung,1 ChongRaeCho,2 JiYoonRyoo,3 HyunKyoLee,1 SoYoungHa,1 JiHoonChoi,1.
Actinomycosis is a chronic localized or hematogenous anaerobic infection caused by Actinomyces israelii and other species of Actinomyces.Findings are a local abscess with multiple draining sinuses, a tuberculosis-like pneumonitis, and low-grade systemic symptoms.
We report what is believed to be the first case of pulmonary Actinomyces graevenitzii infection presenting as organizing pneumonia. Fever and night sweats developed in a 69-year-old male.
Actinomyces naeslundii is an important early colonizer in the oral biofilm and consists of three genospecies (1, 2 and WVA 963) which cannot be readily differentiated using conventional phenotypic.
