Actinomyces neuii bacteria. Feb 29, 2016 · Background.


  •  Actinomyces neuii bacteria. There are case reports of more rare presentations with endocarditis, infected atheromas and bacteremia. neuii, are susceptible to β–lactam antibiotics Feb 1, 2025 · This case report presents an unusual occurrence of Winkia (Actinomyces) neuii vertebral osteomyelitis in a 55-year-old male patient with diabetes mellitus. Int J Syst Bacteriol 1994; 44:167-171. "Assignment of human-derived CDC group 1 coryneform bacteria and CDC group 1-like coryneform bacteria to the genus Actinomyces as Actinomyces neuii subsp. Cases of A. About 70% of infections are due to either Actinomyces israelii Actinomyces organisms reside on mucosal surfaces of the oropharynx and the genitourinary tract. g. First de-scribed in 1985 in two patients with postcataract endoph-thalmitis (4), A. viscosus, A. , von Graevenitz, A. In some species Oct 28, 2025 · How to say actinomyces in English? Pronunciation of actinomyces with 24 audio pronunciations, 3 synonyms, 1 meaning, 4 translations and more for actinomyces. 9 is grouped within Diagnostic Related Group (s) (MS-DRG v43. In vivo growth of actinomycetes usually results in the formation of characteristic clumps called grains or sulfur granules Apr 21, 2023 · Background: Winkia neuii, previously known as Actinomyces neuii, is increasingly recognized as a causative agent of various human infections, while its taxonomy and genomic insights are still understudied. However, cases by new species of Actinomyces have been increasingly reported due to advances in laboratory techniques, and many of these species do not cause classic presentations of actinomycosis. isolated from blood cultures Actinomyces species are opportunistic pathogens that form part of the usual microbiota of humans, they typically colonise the oral cavity, gastrointestinal tract, and female urogenital tract. With the introduction of advanced molecular methods, knowledge about Aug 1, 2023 · Actinomycosis is an opportunistic subacute to chronic bacterial infection, suppurative and granulomatous inflammation in nature, caused by the bacteria of the genus Actinomyces. Jan 8, 2025 · PDF | On Jan 8, 2025, Abraham A Ayantunde and others published Actinomyces Species As Emerging Pathogens: An Observational Study of Clinical Infections and Microbiological Implications | Find Genus: Winkia neuii Formerly: Actinomyces neuii Natural habitats They are most likely of endogenous origin. Actinomyces also appear to require the Nov 3, 2022 · Actinomycosis is a subacute-to-chronic bacterial infection caused by filamentous, gram-positive, non–acid-fast, anaerobic-to-microaerophilic bacteria. Over time, it can result in linked abscesses, pain, and inflammation. The isolation of Actinomyces spp. Introduction: Actinomyces species, Gram-positive filamentous anaerobic microaerophilic organisms, are commensals of the human oropharynx, gastrointestinal, and urogenital tracts. First described in 1985 in two patients with postcataract endophthalmitis (4), A. neuii infections in Alberta, Canada, and review the literature regarding … Classical actinomycosis is an indolent, slowly progressive infection caused by anaerobic or microaerophilic bacteria, primarily of the genus Actinomyces, that colonize the mouth, colon, and vagina. Actinomycosis is rare and occurs when tissue integrity is compromised, Jun 10, 2019 · Background Infective endocarditis caused by Actinomyces spp. Legend: A. from sterile clinical samples is traditionally regarded as significant. May 28, 2016 · Actinomyces neuii is a rare coryneform gram-positive rod that has only recently been described. neuii in China. They are Actinomycosis is a chronic, suppurative, granulomatous infectious disease, caused by different species of Actinomyces bacteria. Sep 25, 2018 · Actinomycosis is a rare, infectious disease in which bacteria spread from one part of the body to another through body tissues. Actinomycosis is a rare chronic disease caused by Actinomyces spp. Ampicillin/sulbactam combines a β-lactam antibiotic with a β-lactamase inhibitor used against penicillin-resistant bacteria producing β-lactamase. Consequently, diagnosis may depend on histopathological evaluation. Previously unrecognized or mis-identified, it has been reported more frequently in recent years as the causative agent of significant infection due to the application of modern technologies such as MALDI-TOF MS or DNA sequencing. is usually indolent. To date, 26 validly published Actinomyces species have been described as part of a normal human microbiota or from human Actinomycosis is a chronic localized or hematogenous anaerobic infection caused by Actinomyces israelii and other species of Actinomyces. We describe the first reported Apr 21, 2023 · Background: Winkia neuii, previously known as Actinomyces neuii, is increasingly recognized as a causative agent of various human infections, while its taxonomy and genomic insights are still understudied. Physicians must be aware of typical clinical presentations (such as Abstract Actinomyces neuii, a species first described in 1994, has proven to be an exception in this genus on account of its aerobic growth, microscopic morphology (no branch-ing), and the types and location of infections. neuii bacteria. Jan 10, 2024 · Actinomycosis is a chronic infection with a tendency to dissect across tissue planes, in a fashion which often mimics cancer. (Source: National Library of Medicine 2013 MeSH Scope Note and Classification) Images Figure 1. Infections typically occur following disruption to the mucosal barrier. The clinical features of actinomycosis have been described, and various anatomical sites Introduction The term actinomycosis was derived from the Greek terms aktino, that refers to the radiating appearance of a sulfur granule, and mykos, which labels the condition a mycotic disease. Aug 17, 2020 · Actinomycosis is a chronic, suppurative, granulomatous infectious disease, caused by different species of Actinomyces bacteria. Anonymous. israelii, A. Jul 19, 2025 · The term comes from their yellow color. , subsp. Due to the rapid spread of new, modern diagnostic procedures, 13 of 26 of these species have been described in this century and Objectives: Patterns of antimicrobial susceptibility in Actinomyces and related genera are very limited in the literature. Mammography, Actinomyces is a widespread, medically signi ficant genus of Winkia neuii (previously Actinomyces neuii) is a rare bacte-bacteria most commonly associated with abscess forma- rial pathogen causing slowly progressive infections tion mouth, jaw, or neck (orocervicofacial actinomycosis), affecting diverse tissue sites. Feb 8, 2023 · Actinomyces spp. Ampicillin and amoxicillin are equally efficacious and can be substituted for penicillin. is extremely rare. The spectrum of infections caused by Actinomyces species ranges from classical invasive actinomycosis to a Gram stain morphology of A. Aug 16, 2022 · Actinomyces species grow optimally under anaerobic conditions. The patient was treated with ampicillin, which was continued for 3 days until his fever, abdominal pain and anorexia fully resolved. Methods: A Winkia strain NY0527 was isolated from the hip abscess of a patient, and its antibiotic susceptibility was assessed. Made up of tangled masses of filamentous Actinomyces bacteria cemented together by a polysaccharide and protein complex. Some facultative anaerobes and aerotolerant species in this genus may grow in the presence of oxygen but extended culture may be required. Jul 27, 2009 · The name actinomycosis means “ray fungus,” and the organisms may resemble fungi owing to their filamentous appearance. 1 There are over 30 species, with most having low pathogenicity and considered normal flora in the mouth, gastrointestinal tract, and female genital tract. It is known to live commensally on and within humans as part of normal, healthy microbiota of the human vagina [3][4] ABSTRACT Actinomyces neuii is an emerging opportunistic pathogen. Subsequently, through 16S rRNA molecular biochemical analysis, it was reclassified as an actinomycete and identified as a novel species known as Actinomyces neuii sp. 5 The prognosis of infections related to A neuii is very good. A Winkia strain NY0527 was isolated from the hip Aug 7, 2023 · Actinomycosis is a rare subacute to chronic infection caused by the gram-positive filamentous non-acid fast anaerobic to microaerophilic bacteria, Actinomyces. org Jun 23, 2025 · Penicillin is the most well-known agent for treatment of actinomycosis and has the greatest amount of experience behind it [1,2]. Feb 1, 2025 · This case report presents an unusual occurrence of Winkia (Actinomyces) neuii vertebral osteomyelitis in a 55-year-old male patient with diabetes mellitus. Over the last few years, there has been a rise in However, not all Actinomyces species share all of these characteristics, and one of these is the clinically relevant Actinomyces neuii. 0 Nov 3, 2022 · Actinomycosis is a subacute-to-chronic bacterial infection caused by filamentous, gram-positive, non–acid-fast, anaerobic-to-microaerophilic bacteria. , Stubbs, S. Their detection and identification in clinical microbiology laboratories and recognition as pathogens in clinical settings can be challenging. Most of the Actinomyces species, including A. The main niche is the oral cavity/pharynx. The global burden of actinomycosis is one case per 300,000 population per year [1] but this may be an underestimate. Penicillin is the most well-known agent for treatment of actinomycosis and has the greatest amount of experience behind it [1,2]. However, its occurrence is being increasingly recognized with the use of improved identification syste Aug 16, 2022 · Actinomyces species grow optimally under anaerobic conditions. The chronic form has multiple abscesses that form sinus tracts and are associated with sulfur granules. bovis and A. Their cells are not acid-fast by most staining procedures. It is frequently misdiagnosed initially. The genome was hybrid assembled from long-reads and short Actinomycosis is a slowly progressive infection caused by anaerobic bacteria, primarily from the genus Actinomyces. Primary actinomycosis of the breast is rare and presents as a mass like density which can mimic malignancy. Traditionally, isolation of actinomyces from any sterile specimen was always considered significant. Dec 1, 2019 · Aims: The objectives of this study were to find out whether and to what extent Actinomyces neuii is pathogenic to humans in terms of causing invasive infections and to ascertain the most appropriate and effective antibiotic therapy against this bacterium. Actinomycosis is a rare subacute or chronic bacterial infection caused by Gram-positive, anaerobic or microaerophilic bacilli, Actinomyces spp. Clindamycin is used against infections with Gram-positive bacteria and is effective against anaerobes. Actinomyces neuii is a Gram-positive bacillus rarely implicated in human infections. Data of predominant susceptibility prof… Oct 4, 2017 · Actinomyces species are Gram-positive anaerobic organisms associated with a wide range of infections: dental caries, abscesses, intraabdominal and blood stream infections. MEDLINE, Google Scholar, SCIndex, Cochrane database of Winkia neuii is a species of Gram-positive, rod-shaped bacteria within the genus Winkia. Clinical Information An infectious process caused by bacteria of the actinomyces species. It grows as round, smooth Jul 1, 2021 · Although classic actinomycosis frequently occurs in patients who are immunocompromised, abscess formation from A neuii has not been shown to be related to immunosuppression or other risk factors. Jan 1, 2024 · This is the first reported case of periprosthetic hip joint infection caused by A. neuii are species isolated from Mar 18, 2015 · SUMMARY Actinomyces israelii has long been recognized as a causative agent of actinomycosis. Abscesses and infected atheromas are the most frequent types of infections, followed by infected skin structures, endophthalmitis, and bacteremias, including endocarditis Jan 1, 2024 · For instance, prior to 1994, Actinomyces neuii, which is mentioned in this case, was referred to as CDC group 1 and group 1-like coryneform bacteria. neuii is a distinct species formerly placed within the Actinomyces genus, exhibiting unique morphological and clinical characteristics. from publication: Actinomyces and Related Organisms in Human Infections | Actinomyces israelii has long been recognized Coryneform bacteria in infectious diseases: clinical and laboratory aspects. , and Collins, M. Initial diagnosis is often difficult, as it mimics urothelial or urachal tumours. neuii isolates were classified as mem-bers of CDC (Centers for Disease Control) fermentative coryneform group 1 or group 1-like [16, 17]. reside on mucosal surfaces and gain access to deeper tissues via surgical procedures, trauma, etc. ICD-10-CM A42. Jul 11, 2025 · Introduction Actinomyces is a genus of Gram-positive, facultatively anaerobic or strictly anaerobic, filamentous bacteria known for their role in chronic infections, especially actinomycosis. It is characterized by the formation of purulent and painful abscesses in the mouth, lungs and gastrointestinal tract. neuii infection is a potential differential diagnosis in periprosthetic joint infection. Vertebral osteomyelitis caused by Actinomyces species is rare, with only one prior case reported in A wide range of Actinomyces species are being increasingly associated with infections at many body sites (11, 13, 14). Code History 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM). Infective endocarditis caused by Actinomyces spp. They are a natural component of the human and animal microbiota, residing predominantly in the oral cavity Learn about actinomyces infection. 9 This case report and review of the literature suggests that in the appropriate clinical setting, coryneform bacteria should be identied to the Feb 1, 2011 · Actinomyces neuii, a species first described in 1994, has proven to be an exception in this genus on account of its aerobic growth, microscopic morphology (no branching), and the types and Jun 1, 2025 · Actinomyces normally reside on mucosal membranes of the oropharyngeal, gastrointestinal, and genitourinary tracts. To investigate which ‘second-line’ biochemical and susceptibility tests could be used for the differential identification of coryneform bacteria (Actinomyces, Arcanobacterium, Brevibacterium, Corynebacterium, Dermabacter, Rothia, Turicella). Recent literature includes many novel species termed Actinomyces -like organisms. However, its occurrence is being increasingly recognized with the use of improved identification systems. Guidelines for treatment of actinomycosis support the use of penicillin G as the drug of choice, although given the diversity of , it is unclear if this should be Actinomyces extended to all species. Background. Mar 18, 2015 · SUMMARY Actinomyces israelii has long been recognized as a causative agent of actinomycosis. Publication: Coyle MB, Lipsky BA. naeslundii, A. Mucosal disruption may lead to infection at virtually any site in the body. , disrupting the mucosal barrier. , in the neck or pelvis). nov [8], [9]. Feb 22, 2011 · Actinomyces neuii, a species first described in 1994, has proven to be an exception in this genus on account of its aerobic growth, microscopic morphology (no branching), and the types and location of infections. There is an emerging rise in Actinomyces species-associated infections, with attendant therapeutic Abstract Actinomycosis remains an underdiagnosed disease, especially in situations such as those specifically caused by Actinomyces neuii, a pathogen that naturally inhabits normal flora but has become implicated as a cause of sepsis and has been observed over a wide age range, and we continue discovering unusual places that can have this pathogen as an infectious origin or as mixed infections. Actinomyces neuii, a species first described in 1994, has proven to be an exception in this genus on account of its aerobic growth, microscopic morphology (no branching), and the types and location of infections. Chronic mass-like lesions may occur near various mucous membranes (e. ABSTRACT Actinomyces organisms reside on mucosal surfaces of the oropharynx and the genitourinary tract. Methods. These codes cover infections in various body parts including the lungs, abdomen, face and neck, central nervous system, and cases of sepsis related to this condition. This paper aims to provide a comprehensive review of pulmonar… Actinomyces A genus of gram-positive, rod-shaped bacteria whose organisms are nonmotile. We reviewed the demographic characteristics, clinical risk factors, and outcomes of patients with Actinomyces spp. Infections with bacteria of the genus actinomyces. Actinomyces rarely causes endocarditis with 25 well-described cases reported in the literature in the past 75 years. This pathogen has been principally associated with superficial soft tissue infections, abscesses of the breast and inguinal areas and postoperative endophthalmitis. The course of infective endocarditis Winkia neuii, previously known as Actinomyces neuii, is increasingly recognized as a causative agent of various human infections, while its taxonomy and genomic insights are still understudied. These organisms are part of the normal flora of the human oropharynx, gastrointestinal tract, and urogenital tract but can […] Female genital tract is usually colonised by several species of Actinomyces such as Actinomyces meyeri, Actinomyces neuii, Actinomycesradingae, Actinomycesturicensis, and Actinomycesurogenitalis. To analyse A. Sep 22, 2020 · Actinomycosis remains an underdiagnosed disease, especially in situations such as those specifically caused by Actinomyces neuii, a pathogen that naturally inhabits normal flora but has become implicated as a cause of sepsis and has been observed over a wide age range, and we continue discovering unusual places that can have this pathogen as an infectious origin or as mixed infections. Abscesses and infected atheromas are the most frequent types of infections, followed by infected skin structures, endophthalmitis, and bacteremias, including endocarditis. What is actinomycosis? Actinomycosis is a chronic or slowly progressive infection caused by various bacterial species of the Actinomyces genus, most commonly Actinomyces israelii. Sep 18, 2022 · But bacteria from a family known as Actinomycetaceae causes it. " Apr 1, 2023 · Pulmonary actinomycosis is a rare infection caused by the bacterial species actinomyces. Filaments that may be present in certain species are either straight or wavy and may have swollen or clubbed heads. Actinomyces meyeri, Actinomyces neuii, and Actinomyces turicensis are emerging as important causes of such infections. Actinomyces Actinomyces are pleomorphic, non-acid-fast, non-motile, and non-endospore-forming bacteria belonging to the Actinomycetales. We present a case of prosthetic valve endocarditis (PVE) caused by Actinomyces naeslundii. 1994 was previously known as CDC coryneform group 1. Objective. Actinomyces neuii (formerly “CDC coryneform group 1” bacteria) (8) is unique among all species of Actinomyces in that it rarely shows classic sulfur granules and gram-positive filaments on microscopy, appearing instead as coccoid or diphtheroidal without branching (9). Culture may be difficult, since Actinomyces species are anaerobic. Actinomycosis is a relatively rare and generally polymicrobial infection caused by Actinomyces species especially in immunocompromised individuals (4,5). They are non-filamentous and do not produce sulfur granules seen commonly with other May 16, 2024 · ABSTRACT Actinomyces organisms reside on mucosal surfaces of the oropharynx and the genitourinary tract. D. It is an uncommon cause of disease in humans. We also provide a systematic review of recently published cases of A. The sensitivity of direct Gram staining of skin and soft tissue samples is low (17 to 21%). Abscesses and infected atheromas are the most frequent types of infections, followed by … Apr 1, 2010 · Actinomyces neuii rarely causes disease in humans. neuii infections in Alberta, Canada, and review the literature regarding this unusual pathogen. , and Actinomyces neuii subsp. Material and method: This study was designed as a systematic review article. After his symptoms resolved, he was advised to continue oral amoxicillin for a further 6 months. Approximate Synonyms Actinomycosis Actinomycotic infection Clinical Information An infectious process caused by bacteria of the actinomyces species. neuii bacteria were shown as small, Gram- positive rods. Vertebral osteomyelitis caused by Actinomyces species is rare, with only one prior case reported in Actinomyces has been reported to cause PD exit-site infections (7). Consistent with the polymicrobial nature of Actinomyces infections, all but one of the clinically significant Actinomyces isolates (one A. Diagnosis is by the typical appearance plus laboratory identification. clevelandclinic. It is characterized by contiguous spread, suppurative and granulomatous inflammation, and formation of multiple abscesses and sinus tracts that may discharge sulfur granules. Jun 24, 2022 · Filamentous bacteria of actinomycosis can be identified on H&E and are highlighted by Gram stain (Infect Drug Resist 2014;7:183) Polymerase chain reaction (PCR) and nucleic acid probes are being developed for faster and more accurate identification Actinomycosis is a chronic infection caused by Actinomyces species characterized by abscess formation, tissue fibrosis, and draining sinuses. 1,2 The definitive diagnosis is usually made postoperatively via tissue pathology. nov. These bacteria with difteroid basil morphology that do not react to acid-fast stain and do not show motility are gram positive bacteria and show branching (1). Mar 1, 2017 · Patterns of antimicrobial susceptibility in Actinomyces and related genera are very limited in the literature. Some of the Actinomyces bacteria in this family include: May 23, 2022 · Monomicrobial infections Preferred regimens — For patients with monomicrobial actinomycosis, we suggest high-dose penicillin. How is actinomycosis diagnosed & best treated Jan 1, 2020 · Aims: The objectives of this study were to find out whether and to what extent Actinomyces neuii is pathogenic to humans in terms of causing invasive infections and to ascertain the most Jun 3, 2021 · “My pap test diagnosis reads ‘bacteria consistent with Actinomyces species’ — what should I do?” At PathAdvantage, we are often asked the above question; we receive swabs for cultures of the vagina or an IUD (with request to identify Actinomyces), or a request for sensitive, amplified molecular testing for this organism. Actinomyces are normal inhabitants of the mouth, gastrointestinal tract, and female genital tract, and do not cause an infection unless there is a break in the skin or mucosa. Clinical significance Winkia neuii rarely causes disease in humans They are isolated from soft tissue abscesses, infected skin, endophthalmitis, bacteremias, and endocarditis Gram stain Gram positive rods, diphteroid, but coccobacilli may Background. Since these infections differ from classical Penicillin is the antibiotic of first choice for clinical infections with Actinomyces spp. Actinomycosis is rare and occurs when tissue integrity is compromised, typically in a polymicrobial fashion. Coryneform bacteria in infectious diseases: clinical and laboratory aspects. Actinomyces are fastidious which can cause difficulty with identification in a routine Actinomyces Contents 1 Background 2 Antibiotic Sensitivities[1] 2. Data of predominant susceptibility profiles could contribute to the establishment of an accurate empirical treatment. These are higher prokaryotic bacteria belonging to the Funke, G. The infection is usually a granulomatous and suppurative infection. Show a central tangle of bacteria with peripheral "clubs" arranged in a rosette, encapsulated by the polysaccharide-protein complex. odontolyticus, A. Our case report highlights that A. Since these infections differ from classical actinomycosis, lacking of specific clinical and imaging findings, slow-growing Actinomyces organisms can be regarded as contaminants or Dec 1, 2024 · What is Actinomyces? Actinomyces refers to a genus of Gram-positive, facultatively anaerobic or strictly anaerobic bacteria known for their filamentous, branching morphology. During the past 3 decades, a large number of novel Actinomyces species have been described. . neuii infections. , anaerobic Gram-positive bacteria that normally colonize the human mouth and digestive and genital tracts. Actinomyces neuii is a Gram-positive bacillus rarely implicated in human infections. Prior to 1994, A. [2–4] Soft Tissue Infections Caused by Actinomyces neuii, a Rare Pathogen Actinomyces neuii rarely causes disease in humans. Several members can be found chiefly or exclusively as coccobacillary or coccoid elements. To date, 26 validly published Actinomyces species have been described as part of a normal human microbiota or from human clinical specimens. Actinomyces neuii, showing creamy-white, confluent colonies growth, was isolated in the blood and urine culture. Polymicrobial infections with Actinomyces organisms are increasingly being reported in the literature. Actinomyces neuii is reported to have a tendency to cause endovascular infection. neuii sp. To our knowledge, this is the first Funke G, et al. Clin Microbiol Rev 1990; 3:227-246. The sensitivity of direct Gram staining of skin Sep 5, 2019 · Introduction As member of the oral flora, actinomyces are organically anaerobic or microaerophilic and sporless microorganisms. 🧍 Actinomyces neuii Funke et al. Background and Objectives: Actinomyces species are part of the normal flora of humans and rarely cause disease. Actinomyces neuii rarely causes disease in humans. The course of infective endocarditis caused by Actinomyces spp. The route of administration depends on the severity and extent of infection. W. 1 Key 3 Table Overview 4 See Also 5 References Download scientific diagram | Natural habitats of human Actinomyces species. Since these infections differ from classical actinomycosis, lacking of specific clinical and imaging findings, slow-growing Actinomyces organisms can be regarded as contaminants or ICD-10 code A42 and its subcodes identify different forms of actinomycosis, a rare bacterial infection caused primarily by Actinomyces species. They colonize human oropharynx, gastrointestinal and urogenital tracts. Findings are a local abscess with multiple draining sinuses, a tuberculosis-like pneumonitis, and low-grade systemic symptoms. Actinomycosis of the urinary bladder is a rare infection caused by the anaerobic bacteria Actinomyces isrealii. neuii isolate) exhibited morphologically dissimilar organisms upon Gram staining, and all significant lesions were either abscesses, cysts, or seromas, which promote anaerobic growth (5). A. However, its occurrence is being increasingly recognized with the use of improved identification syste Introduction: Actinomyces species, Gram-positive filamentous anaerobic microaerophilic organisms, are commensals of the human oropharynx, gastrointestinal, and urogenital tracts. neuii represents 17% of all clinical Actinomyces isolates (8), with some 132 cases of infection caused by this microorganism reported to date. Aerobic actinomyces are a large, diverse group of gram-positive bacteria (2). neuii represents 17% of all clinical Actinomy-ces isolates (8), with some 132 cases of infection caused by this microorganism reported to date. What are causes & symptoms of actinomycosis. See full list on my. Notification list. Treatment is with a long course of antibiotics and surgery. These bacteria are nonmotile and exhibit characteristics that position them between true bacteria and fungi. Assignment of human-derived CDC group 1 coryneform bacteria and CDC group 1-like coryneform bacteria to the genus Actinomyces as Actinomyces neuii subsp. anitratus subsp. With the introduction of advanced molecular methods, knowledge about Jun 10, 2019 · Actinomyces neuii is reported to have a tendency to cause endovascular infection. neuii were identified in 2013-2014 in Alberta Feb 29, 2016 · Background. Most Actinomyces are Gram-stain-positive, but some species may be Gram-stain-variable. jenmw drqrx nlm ya6a a8 tbl s27 g0s3s aps zvw
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