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PubMed2000

[Pulmonary suppuration due to a mixed infection of anaerobic bacterium and Actinomyces].

We report a case of pulmonary suppuration due to a mixed infection of anaerobic bacterium and Actimomyces. A 49-year-old man was admitted to our hospital because of hemoptysis on March 30, 1999. A chest X-ray film showed a localized shadow in the right middle lobe, and a tumor shadow was recognized on chest CT. The anaerobic bacterium were isolated from specimens collected bronchofiberscopically. A diagnosis of pulmonary suppuration due to anaerobic bacterium was made, and treatment with sulbactam/ampicillin, followed by imipenem/cilastatin, was initiated. Although his clinical symptoms and laboratory data improved rapidly following this treatment, the abnormal finding on the chest radiographs remained, with only slight improvement. Accordingly, surgical resection of part of the right middle lobe was performed on June 29 using a video-associated thoracic surgery technique. Actinomycosis was recognized by pathological examination of the resected lesion. A revised diagnosis of pulmonary suppuration due to a mixed infection of anaerobic bacterium and Actinomyces was made. Anaerobic bacterium in the oral cavity are recognized as significant pathogens in pulmonary suppuration. In the present case, we considered anaerobic bacterium and Actinomyces aspirated from the oral cavity into the lung to have caused the pulmonary suppuration.

Actinomycosis↗
PubMed2003

[Actinomyces parotid infection after mandibular third molar extraction].

Actinomycosis is currently an uncommonly diagnosed human disease. The disease is a chronic suppurative infection caused by micro-organism from the Actinomyces group, most often Israelii. A patient with cervicofacial actinomycosis generally reports a history of recent dental treatment which, usually, involves extraction of a mandibular molar. The common initial signs and symptoms of infection (such as sudden onset of cervicofacial pain, swelling, erythema, edema and suppuration) can be absent. In this case report a 29-year-old man presented a mass in his left parotid area, 1 week after mandibular molar extraction. Echography and CT scans revealed a parotid abscess area. The needle-biopsy of swelling revealed infection due to Actinomyces. Therapy was started with intravenous cefazolin (fl 1g X 2 in 100 s.s. i.v.) and methylprednisolone (25 mg tablet, 1/die) for 9 days; 14 days after treatment suspension the lesion reappeared with a fistula and a new therapy was given (ceftriaxone 1 g/die and gentamicin 80 mg/i.m. for 3 weeks). To prevent a relapse, the patient received cefalexin 1 gx2/die per os for 4 weeks. After a follow-up of 1 year, the patient was still asymptomatic.

Actinomycosis, Cervicofacial↗
PubMed2000

[Separation and identification of polyclonal antibodies against type II fimbriae of actinomyces viscosus 5951].

OBJECTIVE: This study was aimed to prepare the polyclonal antibodies against type II fimbriae of actinomyces viscosus 5951. METHODS: Purified type II fimbriae of actinomyces viscosus 5951 were obtained by physical and chemical ways. Then antibodies against type II fimbriae were prepared through immunity of poly ways and tested by double immunodiffusion. RESULTS: The molecular quality of type II fimbriae was 34ku.Concentration of antibodies against type II fimbriae reached 1:64 after immunity of poly ways. CONCLUSION: The molecular quality of type II fimbriae was 34ku.The titre of the antibodies was 1:64, and had mild cross reaction with type I fimbriae.

English Abstract↗
PubMed1979

[Experimental study of the action of the RNAse from Actinomyces rimosus on the variolovaccine virus].

The effect of Actinomyces rimosus RNAase on the variolovaccine virus was studied. The inhibitory effect of the Actinomyces rimosus RNAase on the variolovaccine virus reproduction in the tissue culture cells was shown. In the experiments with the use of chick embryons and rabbits this effect was less pronounced. A 10 time increase in the infection multiplicity both in the tissue culture and the chick embryons had no noticeable effect on the level of the virus inhibition. It was supposed that the inhibitory effect of the RNAase on the variolovaccine was associated with impairment of the cell metabolism.

Animals↗
PubMed1986

[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. Actinomyces meyeri has exceptionally been implicated. The prognosis of osteo-arthritis is similar to that of other localizations. It is usually favorable due to the great sensitivity of the germs to antibiotics, especially penicillin.

Abscess↗
PubMedDate not supplied

[Changes in the actinophage sensitivity and resistance of a culture of Actinomyces griseus and its variants].

Susceptibility and resistance of the culture of Actinomyces griseus 15 and its variants to actinophages was studied. Variants different from the parent culture in their susceptibility or resistance to certain phages can arise as the result of spontaneous variability and lysogenization. The culture of Actinomyces griseus 15 resistant to nine polyphates was found to be able to adsorb them. The mycelium of Act. griseus 15 was shown to contain receptors for a page to which it was susceptible different from those for a polyphage to which it was resistant though capable of adsorbing it.

Adsorption↗
PubMedDate not supplied

[Comparative electron microscopic study of cultures of Nocardia asteroides and of the Nocardia-like variant, Actinomyces chrysomallus].

The ultrastructural organization of the red-orange cultures of Nocardia (Proactinomyces) asteroides was compared with that of a Nocardia-like variant of Actinomyces (Streptomyces) chrysomallus isolated upon the inoculation of the submerged parent culture. The comparison has demonstrated for the first time that the major difference consists in the structure of their cross partitions. In Nocardia, the septa is split at all stages of its formation; in the Nocardia-like variant, the partitions have the same structure as the cultures of the genus Actinomyces (Streptomyces). Therefore, the accepted terminology is conventional.

Culture Media↗
PubMedDate not supplied

[Exoprotease biosynthesis by an Actinomyces spheroides culture on a medium with limited carbon, nitrogen and sulfur sources].

The biosynthesis of exoproteases by Actinomyces spheroides 35 was studied in the conditions of limitation of the growth medium with the source of carbon, nitrogen and sulfur. The absence of these sources from the medium was found to induce the synthesis of exoproteases by the washed mycelium of Actinomyces spheroides. The enzymes were synthesized at a highest rate in the absence of nitrogen and sulfur sources. Protein as a sole source of carbon, nitrogen or sulfur in the medium suppressed rather than induced the biosynthesis of exoproteases by the culture.

Carbon↗
PubMedDate not supplied

[Clarifying the systematic position of Actinomyces erythraeus Waksman et Curtis 1916 and its transfer to the genus Proactinomyces].

Cell walls of Actinomyces erythraeus RIA-1387 were found to contain m-diaminopimelic acid, arabinose, and galactose (type IV of cell walls). The mycelium undergoes fragmentation during superficial and submerged growth, and is not susceptible, or only mildly sensitive, to the action of lysozyme. The colonies of Act. erythraeus have no horizontal layers. These data suggest that the organism was erroneously classed as belonging to the Actinomyces genus. It should be transferred to the Proactinomyces genus under the name of Proactinomyces erythraeus (Waksman et Curtis) comb. nov.

Carbohydrates↗
PubMed1976

[Frequency distribution of pyrimidine isopliths in the DNA of actinophage F448 and Actinomyces coelicolor 66].

Base composition distribution of pyrimidine isopliths with general formula PyrnPn+1 in DNA of Actinomyces coelicolor 66 Kras. and in DNK of its actinophage F448 were investigater. These DNAs differ both pyrimidine isoplith distribution and in composition. The quality of shorter pyrimidine tracts in Actinomyces coelicolor DNA is higher compared with that in actinophage F448 DNA. The possibility of exogenic origin of actinophage F448 is discussed.

Bacteriophages↗
PubMed1998

[Actinomyces infection in a compound odontoma].

INTRODUCTION: Compound odontoma is an abnormal development of dental tissue which is characterized by regular and ordinate structures that resemble a normal tooth. Actinomyces is an abnormal inhabitant of the oral cavity which is able to become pathological whenever the specific or non specific defense mechanisms of an individual may fail. MATERIALS AND METHODS: Described is a case of 60 years old male with no deficit of his immune system confirmed by various analysis. There is one year history of an intermittent pain to the left half of his mandible. An x-ray suggests an odontoma. The gengiva, near the lesion, appears to be ulcerated; two fistulous tracts with the oral mucosa and one with the skin area are seen. After decalcification the tissue obtained from the lesion has been fixed in formalin and included in paraffin. The slides were stained with Haematoxilin-Eosin, PAS and Grocott's silver method. RESULTS: The lesion consists of well differentiated enamel and dentin including a fragment of the pulp featuring the typical aspects of compound odontoma. In addition the pulp shows an intense infiltration of granulocytes, plasma cells and numerous capillaries; around the pulp an extensive area of necrosis is present, in which there are eosinophilic aggregates of amorphic and granular matrix suggestive of an infection by actinomyces. This was confirmed with PAS and by an intense urgyrophilia. CONCLUSION: Described is a case of compound odontoma complicated by an actinomycosis infection in a patient with a well functioning immune system which appears to be the first case reported in the literature, to the best of our knowledge.

Actinomycosis↗
PubMed1994

Kinetics of lactose-reversible coadhesion of Actinomyces naeslundii WVU 398A and Streptococcus oralis 34 on the surface of hexadecane droplets.

Most investigations of mechanisms accounting for intergeneric coaggregation have emphasized stereospecific rather than nonspecific interactions. The purpose of this investigation was to determine the relative importance of lectin-carbohydrate and nonspecific hydrophobic and ionic interactions, using a model based on strains with one of the most well understood specific coaggregation mechanisms, the lactose-reversible coaggregation of Actinomyces naeslundii and Streptococcus oralis. The kinetics of coadhesion and desorption of coadherent bacteria were studied using S. oralis 34 bound to hexadecane droplets as an affinity support for the adhesion of A. naeslundii WVU 398A. Light, confocal microscopy and transmission electron microscopy confirmed that A. naeslundii cells adhered only to the S. oralis cells, not to exposed hexadecane between the streptococci. Coadhesion was inhibited by lactose concentrations as low as 2.0 mM. The rate of coadhesion was halved at 60 mM lactose. The hydrophobicity inhibitors bovine serum albumin and defatted bovine serum albumin and the salts LiCl and KCl failed to inhibit coadhesion in the hexadecane assay, and bovine serum albumin also failed to inhibit coaggregation in a bacterial aggregation assay on glass slides. High concentrations of the salts achieved a 50% rate decrease in A. naeslundii adhesion to the S. oralis-coated droplets only when they were combined with > 20 mM lactose. Sodium dodecyl sulfate (SDS) and Tween 20 inhibition was tested by the slide coaggregation assay because they tended to emulsify the droplets; SDS was inhibitory. Lactose selectively desorbed A. naeslundii from S. oralis-coated droplets at low concentrations equivalent to those that inhibited coadhesion. Neither LiCl nor KCl desorbed A. naeslundii from the droplets, even at 500 mM. At low concentrations, SDS but not Tween 20 eluted both A. naeslundii and S. oralis from the droplets. Although the SDS results might suggest a degree of cooperative charge interactions, the results support the hypothesis that stereospecific, beta-galactoside-sensitive interactions have a much greater impact than nonspecific interactions on the coadhesion of A. naeslundii and S. oralis.

Actinomyces↗
PubMed1983

Arachnia propionica (Actinomyces propionicus) as an unusual agent in tympanomastoiditis.

The actinomycetes are extremely uncommon causative agents in chronic tympanomastoiditis. Few cases have been reported in the literature, and, before the use of penicillin, the majority of patients died of intracranial extension of their disease. Two patients described in the recent literature could have had their conditions diagnosed preoperatively as cholesterol granuloma. They had intact but immobile or bulging tympanic membranes and histories of intermittent perforations with drainage. The diagnosis was suggested during surgery because of the presence of yellow-green amorphous "sulfur granules" scattered throughout the mastoid. Both patients were well following mastoidectomy and long-term penicillin therapy. The clinical history of a patient with tympanomastoiditis due to Arachnia propionica (Actinomyces propionicus) is discussed. To our knowledge, this is the first case reported of a patient with otic disease due to this strain of the organism.

Actinomyces↗
PubMed2000

In vitro colonisation of acrylic resin denture base materials by Streptococcus oralis and Actinomyces viscosus.

AIM: The aim of the study was to compare the attachment of two typical strains of oral bacteria to four denture base materials. DESIGN: In vitro study. METHOD: Discs of acrylic resin denture base materials (Paladon 65, polished and unpolished; Palapress; Microbase, polished and unpolished, and Triad VLC) were placed into Petri dishes with Schaedler's medium, inoculated with Streptococcus oralis 34 or Actinomyces viscosus T14V. MAIN OUTCOME MEASURES: After 24 h or 48 h the numbers of adhering bacteria were measured. RESULTS: The bacteria adhered to all discs in similar numbers: 3-9 x 10(6)/ml (viable cell count) and 9-22 x 10(8)/ml (total cell count) for T14V, and 2-6 x 10(6)/ml (viable cell count) and 1.5-3 x 10(8)/ml (total cell count) for 34. CONCLUSIONS: Polishing had little effect on adherence. Denture base materials are not resistant against adherence and possible surface damage by oral bacteria. Therefore, thorough oral hygiene is important for denture wearers.

Acrylic Resins↗
PubMed1997

Electroporation-mediated transformation of Arcanobacterium (Actinomyces) pyogenes.

Plasmids derived from pNG2 or RSF1010 were introduced into strains of Arcanobacterium (Actinomyces) pyogenes by electroporation. Electroporation conditions were varied systematically to give a maximum electroporation frequency of 3.7 x 10(5) CFU/microgram DNA at 1.5 kV/cm and 246 omega, resulting in a time constant of approximately 10 ms. The A. pyogenes transformants expressed plasmid-encoded resistance to chloramphenicol, erythromycin, kanamycin, and streptomycin. The source of incoming DNA affected the growth rate of transformants, but not the electroporation efficiency. This is the first report of genetic transformation of the veterinary pathogen A. pyogenes.

Actinomyces↗
PubMed1988

Comparative studies on Actinomyces pyogenes and Arcanobacterium haemolyticum.

Actinomyces pyogenes and Arcanobacterium haemolyticum were further characterized. A. haemolyticum, in contrast to A. pyogenes, gave synergistic hemolytic reactions with streptococci of serological group B and inhibited staphylococcal beta-hemolysis. A. pyogenes and A. haemolyticum had a number of common, as well as distinctly different enzymatic properties, useful for their characterization. Extracts from A. pyogenes reacted with antiserum against streptococci of serological group G in contrast to those from A. haemolyticum.

Actinomyces↗
PubMedDate not supplied

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.

Actinomyces↗
PubMed1993

Two cases of Actinomyces pyogenes infection in humans.

Few confirmed human cases of Actinomyces pyogenes infection have been reported partly because of inadequate identification of this bacterium. In this study, two new cases are reported with emphasis on the characteristics which are relevant for identification of the isolates. A review of previously reported cases is presented.

Abscess↗