• Gram-positive, pleomorphic non-spore-forming, non-acid-fast anaerobic or microaerophilic bacilli of the genus Actinomyces and the order Actinomycetales cause actinomycosis. (medscape.com)
  • In rare cases, these bacteria can cause actinomycosis, a disease characterized by the formation of abscesses in the mouth, lungs, or the gastrointestinal tract. (wikipedia.org)
  • Vandeplas et al presented a case series of six patients who developed cervicofacial actinomycosis following third molar extraction. (medscape.com)
  • Vandeplas C, Politis C, Van Eldere J, Hauben E. Cervicofacial actinomycosis following third molar removal: case-series and review. (medscape.com)
  • Cervicofacial Actinomycosis: Diagnosis and Management. (medscape.com)
  • Cervicofacial actinomycosis is characterized in the initial stages by soft-tissue swelling of the perimandibular area. (symptoma.com)
  • Bacteria that masquerade as fungi: actinomycosis/nocardia. (medscape.com)
  • Actinomyces is a genus of the Actinomycetia class of bacteria. (wikipedia.org)
  • Actinomyces species may form endospores, and while individual bacteria are rod-shaped, Actinomyces colonies form fungus-like branched networks of hyphae. (wikipedia.org)
  • Most people have Actinomyces bacteria in the lining of the mouth, throat, digestive tract, and urinary tract, and it is present in the female genital tract. (symptoma.com)
  • Phylogenetic trees based on 16S ribosomal RNA (16SrRNA) sequences have shown that the genus Actinomyces is quite diverse, exhibiting polyphyletic branching into several clusters. (wikipedia.org)
  • The genus Actinomyces comprises the following species: "A. actinomycetemcomitans" Iinuma et al. (wikipedia.org)
  • Another form of actinomycosis is thoracic disease, which is often misdiagnosed as a neoplasm, as it forms a mass that extends to the chest wall. (wikipedia.org)
  • Actinomycosis is most frequently caused by A. israelii, which may also cause endocarditis, though the resulting symptoms may be similar to those resulting from infections by other bacterial species. (wikipedia.org)
  • by continuous infusion at 100 mg/m2 was given to the The major human pathogen for actinomycosis, A. patient. (cdc.gov)
  • Other bacterial species that often are copathogens to Actinomyces species may aid spread of infection by inhibiting host defenses and reducing local oxygen tension. (medscape.com)
  • Actinomycosis may be considered when a patient has chronic progression of disease across tissue planes that is mass-like at times, sinus tract development that may heal and recur, and refractory infection after a typical course of antibiotics. (wikipedia.org)
  • If the actinomycosis is recognized early, cervicofacial infection has a good prognosis with the use of antibiotics alone. (medscape.com)
  • Fazeli MS, Bateni H. Actinomycosis: a rare soft tissue infection. (medscape.com)
  • There may be: a hard, painful swelling in the soft tissue of the mouth, known as a "woody" fibrosis an abscess This is the most common form of infection caused by Actinomyces. (symptoma.com)
  • In tissues, Actinomyces grow in microscopic or macroscopic clusters of tangled filaments surrounded by neutrophils. (medscape.com)
  • Actinomyces species are facultatively anaerobic and they grow best under anaerobic conditions. (wikipedia.org)
  • Actinomyces species are in general susceptible to penicillin and other beta-lactam antibiotics, as well as to most agents used to treat infections by gram-positive anaerobic rods. (medscape.com)
  • The treatment of actinomycosis may require extended antibiotic therapy and surgical interventions as pertinent. (medscape.com)
  • Actinomyces radicidentis , a recently described species, has been isolated with polymerase chain reaction from patients with endodontic infections. (medscape.com)
  • Actinomyces species grow well in enriched media with brain-heart infusion and may be aided in growth by an atmosphere of 6-10% ambient carbon dioxide. (medscape.com)
  • Actinomyces species that cause human disease are not found in nature but are normal flora of the oropharynx, GI tract, and female genital tract. (medscape.com)
  • In general, Actinomyces species, being members of the normal flora, are agents of low pathogenicity and require disruption of the mucosal barrier to cause disease. (medscape.com)
  • Actinomyces species are ubiquitous, occurring in soil and in the microbiota of animals, including the human microbiota. (wikipedia.org)
  • Like various other anaerobes, Actinomyces species are fastidious, thus not easy to culture and isolate. (wikipedia.org)
  • This clade is also strongly supported by a conserved signature indel consisting of a three-amino-acid insertion in isoleucine tRNA synthetase found only in the species of the genera Actinomyces and Mobiluncus. (wikipedia.org)
  • Actinomyces species have also been shown to infect the central nervous system in a dog "without history or evidence of previous trauma or other organ involvement. (wikipedia.org)
  • Actinomyces and related organisms in human infections. (medscape.com)
  • Actinomyces gerencseriae may also cause disease in humans. (medscape.com)
  • The aspect of these colonies initially led to the incorrect assumption that the organism was a fungus and to the name Actinomyces, "ray fungus" (from Greek actis, ray or beam, and mykes, fungus). (wikipedia.org)
  • Actinomycosis is a chronic bacterial disease. (medscape.com)
  • Treatment for actinomycosis consists of antibiotics such as penicillin or amoxicillin for 5 to 12 months, as well as surgery if the disease is extensive. (wikipedia.org)
  • In the treatment of actinomycosis, tetracyclines are as effective as penicillin. (medscape.com)
  • In summary, actinomycosis is still a disease that poses a considerable diagnostic challenge in clinical settings. (symptoma.com)
  • Abdominal disease is another manifestation of actinomycosis. (wikipedia.org)
  • Actinomycosis is a disease of antiquity, having most The markers and morphologic characteristics were consis- likely infected the jaw of a fossil rhinoceros (1) and tent with acute myelocytic leukemia, monocytes with aber- the ribs of a man discovered in southeastern Ontario, rant expression of CD19, a B-cell marker. (cdc.gov)
  • Actinomycosis is the most common infectious the patient every 12 hours for 2 weeks. (cdc.gov)
  • Methods: Here, we describe the case of a 52-years-old patient affected by an asymptomatic, tumor-like tongue swelling , then diagnosed as actinomycosis. (symptoma.com)
  • The genera Actinomyces and Mobiluncus form a monophyletic clade in a phylogenetic tree constructed using RpoB, RpoC, and DNA gyrase B protein sequences. (wikipedia.org)