| evaluation of the rapid ana ii and api zym systems for identification of actinomyces species from clinical specimens. | classification and identification of fermentative actinomycetes are labor-intensive and problematic. in this study, we evaluated the applicability and reliability of the rapid ana ii system (innovative diagnostic systems, inc., atlanta, ga.) and the discriminatory value of the api zym system (societes analytab products inc., la balme les grottes, france) in the identification of actinomyces-like bacteria by using conventional methods as a reference. eighty-five strains, including 71 isolates fro ... | 1992 | 1452693 |
| [actinomyces meyeri actinomycosis: a case with thoracic and tibial localization]. | apart from the rarity of the causal agent, this case is of interest because of the absence of cervico-facial involvement and the presence of multiple cutaneous nodules at a distance from the visceral localisation. | 1986 | 3566013 |
| a case of actinomyces meyeri pneumonia in a child. | pulmonary actinomycosis is an uncommon infection whose diagnosis is often delayed as clinically the disease may mimic tuberculosis or cancer. it is rare in children. we present the first report from australasia of a case of actinomyces meyeri pneumonitis in a 13-year-old boy. | 1986 | 3724627 |
| [bone and joint actinomyces meyeri infections. cervicofacial localizations excluded. apropos of 3 cases]. | the authors report three observations of osseous and/or articular actinomycosis. osseous localizations, always in contact with abscessed foci of the soft tissues, included the spine and one or several limbs. in one case there was an arthritis of the knee. culture and typing of the responsible germ: actinomyces meyeri, were obtained from infectious foci in the three cases. the authors insist on the rare occurrence, at the moment, of osteo-articular actinomycoses outside the maxillo-facial area. a ... | 1986 | 3823776 |
| isolation of actinomyces meyeri from percutaneous disc biopsy specimens following lumbar disc surgery. | | 1994 | 8050447 |
| liver abscess due to actinomyces meyeri. | | 1994 | 8054054 |
| rapid characterization of periodontal bacterial isolates by using fluorogenic substrate tests. | eighty-nine species of subgingival bacteria, represented by 121 reference strains and 892 patient isolates, including gram-negative, gram-positive, aerobic, facultatively anaerobic, microaerophilic, and anaerobic species, were characterized with a panel of fluorogenic, 4-methylumbelliferyl-linked substrate tests. identifications of all patient isolates were confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (sds-page) of whole-cell proteins relative to reference strains. char ... | 1996 | 8789019 |
| cutaneous and muscular abscesses secondary to actinomyces meyeri pneumonia. | | 1996 | 8825001 |
| protein degradation by prevotella intermedia and actinomyces meyeri supports the growth of non-protein-cleaving oral bacteria in serum. | the proteolytic activities of oral bacteria are thought to play an important role in the aetiology of dental abscesses. bacteria-derived proteases may contribute to tissue destruction, and are likely to impair host defence by degrading immunoglobulins and complement. degraded periodontal tissue and tissue fluid are likely to constitute essential sources of nutrients in the abscess. tissue fluid, which is derived from serum, is rich in protein and poor in carbohydrate, suggesting that breakdown o ... | 1997 | 9178115 |
| endocarditis due to actinomyces meyeri. | | 1998 | 9798061 |
| beta-hemolytic streptococci and other beta-hemolytic organisms in apical periodontitis and severe marginal periodontitis. | thirteen teeth with necrotic pulps and apical periodontitis and nine severe periodontal pockets were cultured for presence of beta-hemolytic streptococci and other beta-hemolytic organisms. samples were dispersed and plated on two non-selective and one selective growth media and incubated anaerobically and in 10% co2 in air. a total of 59 beta-hemolytic colonies were purified and identified. eight beta-hemolytic streptococcal isolates were obtained from three of the severe marginal periodontitis ... | 1999 | 10530151 |
| actinomyces canis sp. nov., isolated from dogs. | three strains of a previously undescribed catalase-positive actinomyces-like bacterium were isolated from dogs. biochemical testing and page analysis of whole-cell proteins indicated that the strains were phenotypically highly related to each other but different from previously described actinomyces and arcanobacterium species. sequencing of 16s rrna showed that the unknown bacterium represents a new subline within a cluster of species which includes actinomyces hyovaginalis, actinomyces georgia ... | 2000 | 10939662 |
| [bronchocentric granulomatosis syndrome and actinomycosis caused by actinomyces meyeri]. | | 1998 | 11490524 |
| actinomyces suimastitidis sp. nov., isolated from pig mastitis. | an unusual actinomyces-like bacterium originating from a pig with mastitis was subjected to a polyphasic taxonomic investigation. the morphological and biochemical characteristics of the organism were consistent with its preliminary assignment to the genus actinomyces but it did not appear to correspond to any recognized species. page analysis of whole-cell proteins confirmed the phenotypic distinctiveness of the bacterium and 16s rrna gene sequence analysis demonstrated that it represents a hit ... | 2001 | 11491328 |
| genotypic diversity of clinical actinomyces species: phenotype, source, and disease correlation among genospecies. | we determined the frequency distribution of actinomyces spp. recovered in a routine clinical laboratory and investigated the clinical significance of accurate identification to the species level. we identified 92 clinical strains of actinomyces, including 13 strains in the related arcanobacterium-actinobaculum taxon, by 16s rrna gene sequence analysis and recorded their biotypes, sources, and disease associations. the clinical isolates clustered into 21 genogroups. twelve genogroups (74 strains) ... | 2002 | 12202591 |
| [reply to "primary hepatic abscess caused by actinomyces meyeri" (rev esp enferm dig 2002; 94(2): 108-9)]. | | 2002 | 12587240 |
| [primary hepatic abscess caused by actinomyces meyeri]. | | 2002 | 12185651 |
| actinomyces spp. in supragingival plaque of ethnic chinese preschool children with and without active dental caries. | very limited molecular epidemiological data are available on the role of actinomyces spp. in the pathogenesis of caries in the primary dentition. therefore, we investigated their distribution in supragingival plaque of ethnic chinese preschool children from singapore and hong kong, either with or without active caries. plaque samples were taken from intact interproximal enamel areas using dental floss. bacterial genomic dna of each sample was extracted and variable regions of 16s ribosomal dna a ... | 2003 | 12925831 |
| diagnosis of pelvic actinomycosis by 16s ribosomal rna gene sequencing and its clinical significance. | traditional ways of identification of anaerobic gram-positive non-sporulating bacilli by isolation of the organism and studying it phenotypically by elucidation of its morphologic and biochemical characteristics and metabolic end products are associated with a need for special equipment and expertise, and strains that are "unidentified" because of ambiguous biochemical profiles. in this study, an anaerobic gram-positive non-sporulating bacterium was isolated from the intrauterine contraceptive d ... | 2002 | 12088617 |
| abdominal actinomycosis: complication of endoscopic stenting in chronic pancreatitis? | pancreatic endotherapy is frequently performed in patients with chronic pancreatitis and stenoses of the main pancreatic duct. in a patient with long-standing chronic pancreatitis and treatment with pancreatic stents, metastatic pancreatic head carcinoma was suspected because of infiltration of the neighboring organs and hepatic lesions. ultrasound-guided aspiration of one liver lesion revealed grains typical for actinomycosis. in the light of this case, an extracted pancreatic stent was microbi ... | 2001 | 11740648 |
| stage iii empyema caused by actinomyces meyeri: a plea for decortication. | | 2004 | 15116016 |
| splenic abscesses caused by actinomyces meyeri in a patient with autoimmune hepatitis. | we report a case of actinomycosis with uncommon localizations that was due to actinomyces meyeri. although penicillin is the standard treatment for this condition, our patient was treated successfully with imipenem. actinomyces organisms are important constituents of the normal flora of mucous membranes and are considered opportunistic pathogens; these organisms may produce infection after local trauma, surgery, or aspiration. the mains forms of actinomycosis are cervicofacial, thoracic, and abd ... | 2000 | 10904195 |
| actinomyces meyeri isolation from synovial fluid of a patient with metastatic squamous cell lung carcinoma. | | 2005 | 16380794 |
| perianal actinomycosis: diagnostic and management considerations: a review of six cases. | primary anal actinomycosis of cryptoglandular origin, mainly due to actinomyces israelii, a specific and rare cause of anal suppurative disease, needs to be recognized because it can be cured using specific treatments. | 2006 | 16514379 |
| actinomyces meyeri osteomyelitis of the symphysis pubis following pubovaginal sling. | previous reports of pubic osteomyelitis associated with bone anchors describe symptoms presenting 10 days to 12 months postoperatively with typical pathogens including streptococcus, staphylococcus, citrobacter, and pseudomonas (fitzgerald et al., int urogynecol j 10:346-348, 1999 enzler et al., j bone jt surg am 81-a(12):1736-1740, 1999; graham and dmochowski, j urol 168:2055-2058, 2004; fialkow et al., urology 64(6):1127-1132, 2004; matkov et al., j urol 160(4):1427, 1998). this case illustrat ... | 2007 | 17404680 |
| actinomyces meyeri cutaneous actinomycosis. | actinomyces meyeri cutaneous actinomycosis is a very rare disease. it often results from contiguous dissemination of an underlying focus. we report a case of pulmonary actinomicosis with secondary cutaneous involvement which led to the diagnosis. a 51-year-old man presented with an indurated, erythematous plaque on his right chest wall. he had been diagnosed with pneumoniae one month prior ago and received antibiotic treatment but symptoms persisted. fibrobroncoscopy was normal and bronchoalveol ... | 2009 | 19200191 |
| [cutaneous actinomycosis in the perianal area and buttocks]. | actinomycosis is a rare spreading suppurative and granulomatous disease. in 50 to 60 p. 100 of cases, cervico-facial area is involved. involvement of other cutaneous areas is very uncommon. | 2000 | 10844260 |
| identification of oral actinomyces species using dna probes. | oral actinomyces comprise a major segment of both the supra- and subgingival microbiota; however, little is known about the distribution of individual species in different sites or clinical conditions. the purpose of the present investigation was to develop dna probes for suggested species and genotypes of oral actinomyces. whole genomic dna probes to 12 human oral species and/or serotypes were labeled with digoxigenin and used to seek cross-reactions among the taxa using the checkerboard dna-dn ... | 1999 | 10551171 |
| [actinomyces meyeri empyema]. | | 1998 | 9803282 |
| a rare case of disseminated actinomycosis caused by actinomyces meyeri. | a case of disseminated actinomycosis caused by actinomyces meyeri in a 43-year-old man is described. the patient presented with signs of pericarditis, weight loss, dry cough, and subsequently an inferior vena cava syndrome. diagnosis of thoracic as well as abdominal actinomycosis was made 4 months after admission. this article stresses the importance of considering the diagnosis of the disease. cure was achieved by administering penicillin for several months. | 1997 | 9260489 |
| [actinomyces meyeri disseminated actinomycosis disclosing pulmonary carcinoma]. | the diagnosis of severe actinomycosis parallel to that of neoplasia leads to speculation of a possible fortuitous association. because underlying conditions such as immuno-suppression are suspected in such disease, and to strengthen this hypothesis, we report one more case of disseminated actinomycosis associated with a malignant disease, namely an epidermoid pulmonary carcinoma. the diagnosis was made by thoracotomy a few months after the infectious episode. two years later the patient recovere ... | 1997 | 9255374 |
| the importance of immunoglobulin-breakdown supporting the growth of bacteria in oral abscesses. | oral bacteria play an important rôle in the causation of oro-facial abscesses. however, they can also be involved in brain, liver and lung abscesses. to persist, it is essential that these bacteria can grow on those sites. the main source of nutrients for growth in abscesses is likely to be tissue exudate, which is rich in serum-derived proteins, and relatively poor in free amino acids and carbohydrates. degradation of intact proteins seems a crucial step in providing the peptides necessary for ... | 1996 | 8877656 |
| microbiologic profile of endodontic infections from hiv- and hiv+ patients using multiple-displacement amplification and checkerboard dna-dna hybridization. | to compare the microbiota of endodontic infections in necrotic pulp from hiv-negative and hiv-positive subjects. | 2012 | 22335194 |
| actinomyces and related organisms in human infections. | actinomyces israelii has long been recognized as a causative agent of actinomycosis. during the past 3 decades, a large number of novel actinomyces species have been described. their detection and identification in clinical microbiology laboratories and recognition as pathogens in clinical settings can be challenging. with the introduction of advanced molecular methods, knowledge about their clinical relevance is gradually increasing, and the spectrum of diseases associated with actinomyces and ... | 2015 | 25788515 |
| disseminated infection due to actinomyces meyeri: case report and review. | actinomyces meyeri is rarely isolated in cases of actinomycosis. we present a case of disseminated actinomycosis due to a. meyeri; the patient had an abscess of the lung, osteomyelitis of the tibia, and multiple skin abscesses. cure was achieved with surgical debridement and administration of intravenous penicillin, followed by oral penicillin, for 1 year. a concomitant gram-negative bacillus, actinobacillus actinomycetemcomitans, was also isolated. review of the literature revealed only 26 well ... | 1996 | 8729199 |
| [actinomyces meyeri cutaneous actinomycosis with pulmonary localization]. | infections due to actinomycosis species are located in the cervico-facial region in 50 to 65 percent of the cases. extra-cervical cutaneous lesions are exceptional. the most frequently encountered germ is actinomyces israeli, observed in 85 percent of the cases. we report the case of an actinomyces meyeri infection which presented as a leg abscess and a pulmonary lesion. there was no cervico-facial localization. there was however a chronic parodontitis. a second germ, capnocytophaga sp. was isol ... | 1993 | 8074351 |
| necrotizing funisitis associated with actinomyces meyeri infection: a case report. | necrotizing funisitis is associated with an increased rate of stillbirth, perinatal infection, and preterm delivery. no one organism has been associated with necrotizing funisitis, although this condition has been linked with congenital syphilis in some studies. we report a case of necrotizing funisitis in a 24-year-old g2p0a2 woman who experienced preterm labor at 31 weeks of gestation. examination of the placenta revealed severe chorioamnionitis and necrotizing funisitis; large numbers of gram ... | 1994 | 7855012 |
| actinomyces meyeri osteomyelitis: an unusual cause of chronic infection of the tibia. | a 50-year-old man had draining fistulas of the right tibula for 15 years. he had been previously treated with antibiotic therapy of an unknown nature and by 3 sequestrectomies spaced over the 15-year interval, without a cure having been achieved. several anaerobic bacteria, including actinomyces meyeri were isolated from the bone lesion. the involvement of an actinomycete in osteomyelitis of a long bone is a very rare occurrence. after an additional sequestrectomy and penicillin therapy of an ap ... | 1980 | 7379389 |
| thoracic actinomycosis caused by actinomyces meyeri. | two patients with chest infections caused by actinomyces meyeri were seen during a 5-yr period. one patient was ill for 2 yr and had chronic infection manifested by bilateral cavitary and fibrotic changes on chest roentgenogram. a. meyeri was isolated from a chest wall lesion, transtracheal aspirate, and lung tissue. the other patient presented with a subcutaneous abscess of the left hip that yielded a. meyeri on culture. a localized lung infection and empyema were found. both patients had other ... | 1982 | 7065532 |
| empyema secondary to actinomyces meyeri treated successfully with ceftriaxone followed by doxycycline. | actinomycosis is a relatively rare infection caused by gram-positive bacteria. we present the case of a 54-year-old, previously healthy, male patient with a history of severe penicillin allergy who developed severe pneumonia and empyema caused by actinomyces meyeri. presenting symptoms included productive cough, right upper quadrant pain, and chills and rigors. he required drainage of the empyema via tube and prolonged antibiotic treatment with intravenous ceftriaxone for 2 weeks followed by ora ... | 2016 | 27752374 |
| actinomyces meyeri presenting as an asymptomatic lung mass. | a 55-year-old man was admitted to the hospital for an elective herniorrhaphy. a significant past history of smoking and alcohol abuse was noted. the patient had no other complaints but a routine chest x-ray revealed an isolated left upper lobe mass. laboratory tests were unrevealing and the impression was that the patient had a carcinoma. the surgical specimen consisted of a lobular mass containing multiple microabscesses. grains consistent with actinomycosis were seen and the culture grew out a ... | 1984 | 6717557 |
| hematogenous dissemination of thoracic actinomycosis due to actinomyces meyeri. | | 1985 | 4080591 |
| osteomyelitis of the foot due to actinomyces meyeri: a case report. | anaerobic osteomyelitis occurs uncommonly with actinomyces as a cause of approximately half of the reported cases. although actinomyces is a common organism in the mouth flora, it is an uncommon pathogen in osteomyelitis occurring in the extremity. the following reports the only known case of anaerobic osteomyelitis of the foot secondary to a. meyeri. | 1987 | 3440560 |
| [pneumonia and empyema due to actinomyces meyeri: case report of an 80 year-old patient and a literature review]. | | 2016 | 26253035 |
| actinomyces meyeri empyema: a case report and review of the literature. | 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. a chest tube was inserted and purulent pleural fluid was drained. a. meyeri was isolated in anaerobic cultures of the pleural fluid. the infection was a ... | 2015 | 26124969 |
| disseminated actinomycosis caused by actinomyces meyeri. | we describe a 35-year-old man with disseminated actinomycosis due to actinomyces meyeri and treated successfully with penicillin. to our knowledge this is the first case report of a generalized infection due to this species, involving lung, intra- and retroperitoneal organs. | 1989 | 2737757 |
| [actinomycosis--clinical and therapeutic considerations based on 2 personal case reports]. | we report on two patients with actinomycosis. the first case was a 45-year-old cachectic man with extensive bilateral pulmonary infiltrates. the lesions remained unclear for 18 months and only open lung biopsy with microscopic and cultural evaluation led to the diagnosis of actinomycosis. in the second case, classic cervico-facial actinomycosis in a 69-year-old farmer is described. diagnosis was established on the basis of microscopic findings of "sulphur granules" eroding the mandible. furtherm ... | 1991 | 1925461 |
| photo quiz: not-so-humongous fungus or an imposter? actinomyces meyeri sinusitis. | | 2015 | 25976898 |
| actinomyces meyeri brain abscess following dental extraction. | we describe the rare occurrence of an actinomyces meyeri cerebral abscess in a 55-year-old woman following a dental extraction. this patient presented with a 2-day history of hemisensory loss, hyper-reflexia and retro-orbital headache, 7 days following a dental extraction for apical peridonitis. neuroimaging showed a large left parietal abscess with surrounding empyema. the patient underwent craniotomy and drainage of the abscess. a. meyeri was cultured. actinomycosis is a rare cause of cerebral ... | 2015 | 25870213 |
| a case of disseminated infection due to actinomyces meyeri involving lung and brain. | actinomyces meyeri is rarely isolated in cases of actinomycosis. the identification of a. meyeri had historically been difficult and unreliable. with the recent development of 16s ribosomal rna (16s rrna) sequencing, actinomyces species such as a. meyeri can be isolated much more reliably. a. meyeri often causes disseminated disease, which can be secondary to frequent pulmonary infections. a penicillin-based regimen is the mainstay of a. meyeri treatment, with a prolonged course usually required ... | 2014 | 25566409 |
| [disseminated actinomycosis caused by actinomyces meyeri. 3 cases with multiple cutaneous localizations]. | | 1991 | 1789654 |
| [bacteriological study on juvenile periodontitis]. | the predominant cultivable microflora of 23 pockets in 15 juvenile periodontitis (jp) patients was studied for the first time in china using the current anaerobic methodology. samples were taken with sterile paper points and dispersed on a vortex mixer. then the diluted samples were plated on the non-selective blood agar plates and selective mgb medium which favors the growth of actinobacillus actimycetemcomitans (aa) and incubated in anaerobic chamber for 5 days. from each sample 15 or more iso ... | 1991 | 1676335 |
| actinomyces meyeri meningitis: the need for anaerobic cerebrospinal fluid cultures. | we herein present a rare case of actinomyces meyeri-induced meningitis that occurred in a patient of advanced age with poor oral hygiene. although gram staining of the cerebrospinal fluid (csf) revealed gram-positive rods and a blood culture was positive for the organism, a bacterial culture of the csf was negative. anaerobic cultures of csf specimens are not routinely performed; however, anaerobes are sometimes involved in central nervous system infection. we therefore believe that anaerobic cu ... | 2014 | 24390532 |
| fulminant course of unilateral emphysematous pyelonephritis revealing a renal actinomycosis caused by actinomyces meyeri, an unknown cause of septic shock. | the objective of this case report is to describe the first case of renal actinomycosis caused by actinomyces meyeri presenting as severe emphysematous pyelonephritis and complicated by septic shock and multi-organ failure. emphysematous pyelonephritis is a potentially life-threatening infection mostly described in diabetic patients and predominantly caused by uropathogenic bacteria. actinomycosis is an uncommon chronic infection due to anaerobic gram-positive bacteria that unusually involves the ... | 2014 | 25878793 |
| cervical spondylitis and spinal abscess due to actinomyces meyeri. | human actinomycosis with involvement of the spine is a rare condition although it has been first described a long time ago. it is probably underrecognized since its clinical presentation is often misleading and accurate bacteriological diagnosis is challenging. we herein report a rare case of cervical actinomycosis with paravertebral abscess and spondylitis imputed to an infection by actinomyces meyeri in a 52-year-old immunocompetent caucasian man. a. meyeri should be considered as a potential ... | 2014 | 24211629 |
| the predominant bacteria isolated from radicular cysts. | to detect predominant bacteria associated with radicular cysts and discuss in light of the literature. | 2013 | 24011184 |
| hemoptysis as an early symptom of abdominal actinomycosis with thoracic extension ten years after cholecystectomy with retained gallstone. | thoracoabdominal actinomycosis is rare, especially in the context of readily available medical facilities. | 2013 | 23859691 |
| microbiological diversity of peri-implantitis biofilm by sanger sequencing. | to examine the microbial diversity associated with implants with or without peri-implantitis and to identify differences between the bacterial communities in these clinical conditions. | 2014 | 23845046 |
| identification of actinomyces meyeri actinomycosis in middle ear and mastoid by 16s rrna analysis. | actinomycosis of the middle ear and mastoid is extremely rare. here, we report a unique case of actinomycosis of the middle ear and mastoid caused by actinomyces meyeri diagnosed by 16s rrna gene sequence analysis. | 2013 | 23639988 |
| actinomyces meyeri: from "lumpy jaw" to empyema. | while the most common presentation of actinomycosis is cervicofacial disease, or "lumpy jaw syndrome," actinomyces meyeri has a predilection for pulmonary disease as well as dissemination to distant organs. we describe a 61-year-old caucasian male with a relapsing-remitting mandibular sinus tract who would go on to develop weight loss, dyspnea, and a cough productive of malodorous sputum. imaging revealed a right lower lobe pneumonia and a large left sided empyema. he underwent thoracotomy and d ... | 2013 | 23532675 |
| brain abscess as an initial presentation in a patient of hereditary haemorrhagic telangiectasia caused by a novel eng mutation. | hereditary haemorrhagic telangiectasia (hht) is a rare inherited autosomal-dominant vascular dysplasia involving multiple organs. brain abscess is an uncommon and potential fatal complication. we report a case of hht caused by a novel eng mutation who initially presented as brain abscess. the patient, with a family history of epistaxis, presented with fever, headache and right-sided haemiparesis. upon examination, brain mri showed a contrast-enhanced abscess on the left fronto-parietal region. o ... | 2013 | 23440993 |
| [empyema by actinomyces meyeri]. | | 2013 | 23141045 |
| osteomyelitis of a long bone due to fusobacterium nucleatum and actinomyces meyeri in an immunocompetent adult: a case report and literature review. | fusobacterium species are uncommon causes of osteomyelitis. these organisms are normal flora of the oral cavity. therefore, they mostly cause osteomyelitis of the head and neck. hematogenous osteomyelitis at distant sites other than the head and neck has rarely been reported in pediatric or immunocompromised patients. here, we report the first case of osteomyelitis of a long bone combined with a muscle abscess due to fusobacterium nucleatum in an otherwise healthy adult. | 2012 | 22817336 |
| actinomyces meyeri infection: case report and review of the literature. | actinomyces meyeri is an uncommon cause of actinomycosis. we present a patient with pneumonia and empyema due to a. meyeri. the patient underwent open thoracotomy with decortication and was discharged home on a twelve-month course of oral penicillin. review of the english literature revealed thirty-two cases of infection due to a. meyeri. the majority of patients were male, and a significant number had poor dental hygiene and a history of alcoholism. more than other actinomyces species, a. meyer ... | 2012 | 22406688 |
| first reported case of bacterial endocarditis attributable to actinomyces meyeri. | a 48-year-old man presented to the victoria general hospital, halifax, nova scotia in severe congestive heart failure. echocardiographic studies revealed significant aortic valve insufficiency. two anaerobic blood cultures performed two weeks apart were both positive for actinomyces meyeri. the patient was treated with high dose intravenous penicillin. three weeks after antibiotics were begun, he underwent aortic valve replacement. intraoperative cultures were negative. histopathological examina ... | 1996 | 22514421 |
| emerging role of actinomyces meyeri in brain abscesses: a case report and literature review. | we describe a case of a 29-year-old man from pakistan who presented with progressive neurologic symptoms over 1 week and was found to have a right parietal cerebral abscess. neurosurgical drainage cultures showed growth of actinomyces meyeri, streptococcus intermedius, and parvimonas micra. an abscessed molar was identified as the likely port of entry and was extracted. the patient was treated with metronidazole, vancomycin, and doxycycline because of prior anaphylaxis to penicillin. at 6-month ... | 2017 | 28831384 |
| disseminated actinomycosis due to actinomyces meyeri and actinobacillus actinomycetemcomitans. | a 44-year-old man presented with pulmonary lesions and neurological symptoms suggestive of lung carcinoma with cerebral metastases. he had non-specific chest x-ray findings since 6 years and he also suffered from relapsing purulent skin lesions which resolved spontaneously or by short courses of antibiotic treatment. when corticosteroids were given, multiple subcutaneous swellings developed that spontaneously ruptured. the pus contained actinomyces meyeri and actinobacillus actinomycetemcomitans ... | 1992 | 1465587 |
| usefulness of the microseq 500 16s ribosomal dna-based bacterial identification system for identification of clinically significant bacterial isolates with ambiguous biochemical profiles. | due to the inadequate automation in the amplification and sequencing procedures, the use of 16s rrna gene sequence-based methods in clinical microbiology laboratories is largely limited to identification of strains that are difficult to identify by phenotypic methods. in this study, using conventional full-sequence 16s rrna gene sequencing as the "gold standard," we evaluated the usefulness of the microseq 500 16s ribosomal dna (rdna)-based bacterial identification system, which involves amplifi ... | 2003 | 12734240 |
| [authors reply: primary hepatic abscess caused by actinomyces meyeri]. | | 2002 | 12733339 |
| disseminated actinomyces meyeri infection resembling lung cancer with brain metastases. | thoracic actinomycosis can resemble bronchogenic carcinoma in its clinical presentation and radiographic appearance. we report a case of pulmonary actinomycosis caused by actinomyces meyeri in which hematogenous dissemination caused multiple brain abscesses resembling metastatic lung cancer. the correct diagnosis was made by thin-needle aspiration of a pleura-based lung mass. the pathogen isolated was further identified with the use of 16s rdna sequencing. antibiotic therapy resulted in rapid im ... | 2003 | 14501233 |
| [thoracic wall crossing (pseudo-?) tumor in a child: abscess-forming thoracic actinomycosis caused by actinomyces meyeri et israeli]. | | 2004 | 14712418 |
| [a case of pulmonary actinomycosis, who expectorated sulfur granules, caused by actinomyces odontolyticus and actinomyces meyeri]. | a 51-year-old man complaining of cough and bloody sputum, was admitted to our hospital because of antibiotic-resistant chronic pneumonia in the right upper lobe. initially, bronchoscopic examination and sputum culture revealed no evidence of malignancy or any specific infection, either pathologically or microbiologically. however, pathological examination of a solid body expectorated with sputum revealed typical sulfur granules, indicating pulmonary actinomycosis. two actinomyceses named actinom ... | 2005 | 15966370 |
| subphrenic abscess secondary to actinomycosis meyeri and klebsiella ozaenae following laparoscopic cholecystectomy. | a case is reported of a subphrenic abscess 12 months post-laparoscopic cholecystectomy in a 72-year-old male with identification of actinomyces meyeri and the oropharyngeal commensal klebsiella ozaenae. the first organism is exceptionally rare following laparoscopic cholecystectomy and is presumed to be a result of inadvertent gallstone spillage. the second organism has not previously been reported in a subphrenic abscess. the etiopathogenesis and management of this condition are presented. | 2009 | 19487988 |
| [multiple hepatic abscesses due to actinomycosis: difficulties of diagnosis]. | authors present the case of a 65 year-old man without any remarkable previous illness, hospitalized because of having prolonged fever caused probably by an infection due to a tick bite. tularaemia and bartonellosis based on serological results as well as neoplasm of the sigma with multiple metastases to the liver raised by ultrasonography and abdominal ct could be excluded with detailed investigations. multiple abscesses of the liver were diagnosed, followed by a percutaneuos ultrasonography dir ... | 2011 | 21296736 |
| chronic postoperative endophthalmitis caused by actinomyces meyeri. | we report a female patient who developed chronic endophthalmitis after an uneventful cataract surgery. cultures of aqueous humor and a vitreous sample showed positivity for actinomyces meyeri. intense anterior segment inflammation and a less evident impairment of the patient's posterior segment led us to treat her vigorously with pars plana vitrectomy combined with intraocular and topical antibiotics. the patient achieved a good recovery of vision without the need to remove the intraocular lens ... | 2011 | 21475608 |
| pulmonary actinomycosis in a male patient with a tracheal bronchus. | <span style="font-weight: bold"> | 2011 | 21499592 |
| Persistent extraradicular infection in root-filled asymptomatic human tooth: scanning electron microscopic analysis and microbial investigation after apical microsurgery. | Procedural accidents have a negative effect on healing and might contribute to the persistence of infections in inaccessible apical areas, requiring surgical intervention. This report describes a case of persistent apical periodontitis of a lower left first molar associated with the sinus tract and a periapical lesion that required nonsurgical endodontic retreatment and apical surgery for resolution. | 2011 | 22099908 |
| primary cutaneous actinomycosis caused by actinomyces meyeri as first manifestation of hiv infection. | primary cutaneous actinomycosis is very uncommon. we report a patient with cutaneous actinomycosis with multiple lesions without any detectable extra-cutaneous lesions. in our patient the actinomycosis was the presenting manifestation of hiv infection. | 2011 | 22136861 |
| salivary microbiota and caries occurrence in mutans streptococci-positive school children. | to compare the composition of the salivary microbiota in caries-affected vs. caries-free mutans streptococci (ms)- positive children with mixed dentition. | 2016 | 27759406 |
| actinomyces meyeri, a common agent of actinomycosis. | actinomyces, particularly actinomyces israelii, may cause indolent, persistent infections or represent normal mucosal flora, leading to management dilemmas. | 2016 | 27432035 |
| actinomyces meyeri popliteal cyst infection and review of the literature. | a 66-year-old, caucasian male presented with pain and swelling involving the left knee of one-week duration. arthrocentesis was negative for evidence of septic arthritis. magnetic resonance imaging (mri) study of the left knee showed degenerative arthritis, partial tear of medial meniscus, and a complex fluid collection along the posteromedial aspect of the left knee suggestive of popliteal cyst. he underwent arthroscopy with partial medial meniscectomy. intraoperative joint fluid was noted to b ... | 2017 | 28255479 |
| actinomyces meyeri empyema. | | 2016 | 27979634 |
| abdominal actinomycosis in children: a case report and literature review. | abdominal actinomycosis is an uncommon pediatric infection that often manifests with a tumor-like lesion. we describe a previously healthy 11-year-old girl who presented with right lower quadrant abdominal pain and drainage. computed tomography scan showed an abdominal wall mass. surgical debridement cultures grew actinomyces meyeri. literature review identified 18 additional pediatric cases since 1964 that we have summarized. | 2017 | 27870811 |
| olecranon osteomyelitis due to actinomyces meyeri: report of a culture-proven case. | actinomyces meyeri is a gram positive, strict anaerobic bacterium, which was first described by meyer in 1911. primary actinomycotic osteomyelitis is rare and primarily affects the cervicofacial region, including mandible. we present an unusual case of osteomyelitis of a long bone combined with myoabscess due to a. meyeri. a 70-year-old man was admitted for pain and pus discharge of the right elbow. twenty-five days before admission, he had hit his elbow against a table. mri of the elbow showed ... | 2016 | 27659433 |
| [thoracic actinomycosis: report of a case]. | actinomycosis is a disease produced by bacteria of the genus actinomyces. the thoracic form represents 30% of the cases. signs and symptoms are generally unspecific. a previously healthy 11 year old girl was admitted with a chest mass of a month of evolution associated with fever, hyporexia and weight loss. thoracic actinomycosis was diagnosed with the isolation of actinomyces meyeri in the mass drainage. she received antibiotic treatment for a year with complete resolution. although rare, it sh ... | 2015 | 26593814 |
| resistance patterns in clinical isolates of pathogenic actinomyces species. | actinomyces spp. are commensals that may occasionally invade deep tissue structures, causing difficult-to-treat and disfiguring lesions. information on antimicrobial resistance patterns is limited to observations from two previous studies. therefore, we examined antimicrobial resistance patterns in clinical isolates of actinomyces spp. | 2016 | 26538502 |
| [tumor-bronchial actinomycosis simulating a recurrence of lung cancer 14 years after initial treatment: a case report]. | a patient with a history of squamous cell carcinoma of the right upper lung lobe treated 14 years before by concomitant chemo-radiotherapy was referred on account of dyspnea. bronchial endoscopy revealed complete obstruction of the right main bronchus highly suggestive of a tumor recurrence. however, biopsy samples only showed inflammatory and necrotic tissue with no evidence of malignancy. despite complete tissue resection by rigid bronchoscopy, a rapid and complete recurrence occurred requirin ... | 2015 | 26024827 |
| antimicrobial and cytotoxic effects of phosphoric acid solution compared to other root canal irrigants. | phosphoric acid has been suggested as an irrigant due to its effectiveness in removing the smear layer. | 2015 | 26018307 |
| mediastinitis by actinomyces meyeri after oesophageal stent placement. | actinomyces meyeri is a gram-positive anaerobic forming bacterium of the genus actinomyces, part of the oral cavity's flora, and its classification remains an unresolved issue. it is an extremely rare cause of disease, occurring in middle-aged immunocompetent patients and frequently misdiagnosed as malignancy or lung abscess. a 56-year-old man diagnosed with oesophageal squamous cell carcinoma had an endoscopically placed stent to palliate his dysphagia. two weeks later he presented with thoraca ... | 2014 | 24903727 |
| [actinomyces meyeri brain abscess]. | | 2014 | 24456920 |