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soil-inhabiting saprophytes and disease-producing plant and animal parasites

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2017/06/13 20:18:47」(JST)

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Actinomyces naeslundii is a Gram-positive, rod-shaped bacterium found in the mouth of humans. The species has been implicated in periodontal disease, as well as various tooth cavities.^[1] In other cases, A. naeslundii is associated with good oral health. It is one of the first bacteria to occupy the oral cavity and colonize the tooth's surface. It has also been isolated from women with bacterial vaginosis.^[2]

Description

A. naeslundii appears Gram-positive and pleomorphic by microscopy. It does not form spores, and is considered anaerobic or microaerophilic.^[3]

In 2009, the species A. naeslundi was split. Bacteria formerly known as "Actinomyces naeslundi genospecies 2" were reclassified under the new species name Actinomyces oris. Those formerly known as "Actinomyces naeslundi genospecies WVA 963" were reclassified as Actinomyces johnsonii.^[3]

Role in disease

Many species of the genus Actinomyces, including A. naeslundii, cause a chronic disease called actinomycosis, which is characterized by swelling and formation of an abscess which may exude pus. This can be accompanied by tissue fibrosis.^[4]

Infections of the mouth, face, and neck are the most commonly recognized infections; however, the thoracic region, abdomen, pelvis, and the central nervous system can also be involved.^[1]

References

^ ^a ^b Nanna Sarkonen (August 2007). "Oral Actinomyces Species in Health and Disease: Identification, Occurrence and Importance of Early Colonization" (PDF). National Public Health Institute, Helsinki, Finland. Retrieved 24 July 2016.
^ Africa, Charlene; Nel, Janske; Stemmet, Megan (2014). "Anaerobes and Bacterial Vaginosis in Pregnancy: Virulence Factors Contributing to Vaginal Colonisation". International Journal of Environmental Research and Public Health. 11 (7): 6979–7000. ISSN 1660-4601. PMC 4113856 . PMID 25014248. doi:10.3390/ijerph110706979.
^ ^a ^b Henssge, U.; Do, T.; Radford, D. R.; Gilbert, S. C.; Clark, D.; Beighton, D. (2009). "Emended description of Actinomyces naeslundii and descriptions of Actinomyces oris sp. nov. And Actinomyces johnsonii sp. nov., previously identified as Actinomyces naeslundii genospecies 1, 2 and WVA 963". International Journal of Systematic and Evolutionary Microbiology. 59 (3): 509–16. PMC 2884933 . PMID 19244431. doi:10.1099/ijs.0.000950-0.
^ Quinonez JM. "Pediatric Actinomycosis". Medscape. Retrieved 22 May 2016.

External links

Actinomyces naeslundii MG1 Genome Page
Type strain of Actinomyces naeslundii at BacDive - the Bacterial Diversity Metadatabase

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1. 頚部顔面の放線菌症 cervicofacial actinomycosis

English Journal

Effects of short-chain fatty acids on Actinomyces naeslundii biofilm formation.

Yoneda S, Kawarai T, Narisawa N, Tuna EB, Sato N, Tsugane T, Saeki Y, Ochiai K, Senpuku H.SourceDepartment of Bacteriology, National Institute of Infectious Diseases, Tokyo, Japan.
Molecular oral microbiology.Mol Oral Microbiol.2013 Oct;28(5):354-65. doi: 10.1111/omi.12029. Epub 2013 Jun 3.
Actinomyces naeslundii is an early colonizer and has important roles in the development of the oral biofilm. Short-chain fatty acids (SCFA) are secreted extracellularly as a product of metabolism by gram-negative anaerobes, e.g. Porphyromonas gingivalis and Fusobacterium nucleatum; and the SCFA may
PMID 23731652

Identification of the actinomycete 16S ribosomal RNA gene by polymerase chain reaction in oral inflammatory lesions.

Kuyama K, Fukui K, Ochiai E, Maruyama S, Iwadate K, Saku T, Yamamoto H.SourceDepartment of Oral Pathology, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan; Department of Forensic Medicine, The Jikei University School of Medicine, Minato, Tokyo, Japan; Department of Diagnostic Pathology, Hospital of Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, Japan. Electronic address: kuyama.kayo@nihon-u.ac.jp.
Oral surgery, oral medicine, oral pathology and oral radiology.Oral Surg Oral Med Oral Pathol Oral Radiol.2013 Oct;116(4):485-91. doi: 10.1016/j.oooo.2013.06.027.
OBJECTIVES: To examine the histopathological characteristics of inflammatory lesions containing Actinomyces based on DNA sequencing. Furthermore, case reports of actinomycosis in the maxillofacial region are summarized by a review of the literature.STUDY DESIGN: The study comprised 12 cases of infla
PMID 24035115

In vivo study of the initial bacterial adhesion on different implant materials.

Al-Ahmad A, Wiedmann-Al-Ahmad M, Fackler A, Follo M, Hellwig E, Bächle M, Hannig C, Han JS, Wolkewitz M, Kohal R.SourceDepartment of Operative Dentistry and Periodontology, Albert-Ludwigs-University, Hugstetter Strasse 55, Freiburg, Germany. ali.al-ahmad@uniklinik-freiburg.de
Archives of oral biology.Arch Oral Biol.2013 Sep;58(9):1139-47. doi: 10.1016/j.archoralbio.2013.04.011. Epub 2013 May 18.
OBJECTIVE: Biofilm formation on implant materials plays a major role in the aetiology of periimplantitis. The aim of this study was to examine in vivo the initial bacterial adhesion on six different implant materials.METHODS: The implant materials Ti-m, TiUnite®, ZiUnite®, ATZ-m, ATZ-s, TZP-A-m we
PMID 23694907

Japanese Journal

Actinomyces naeslundiiによる頸部放線菌症の1例

木村寛
日本耳鼻咽喉科学会会報 114(7), 620-623, 2011
… Actinomyces naeslundiiはオーラルバイオフィルムを形成する細菌である. … naeslundiiによる頸部放線菌症例を経験したので報告する.症例は56歳の男性で, 主訴は頸部腫脹で歯科治療も受けていた. … naeslundiiが同定された. … naeslundiiによる頸部放線菌症例であると推察された. …
NAID 130000992905

Antimicrobial Activity of Gel-Entrapped Catechins toward Oral Microorganisms

Tamura Muneaki,Saito Hideo,Kikuchi Kuniyoshi,Ishigami Tomohiko,Toyama Yoshio,Takami Masao,Ochiai Kuniyasu
Biological & Pharmaceutical Bulletin 34(5), 638-643, 2011
… GEC inhibited the growth of the Actinomyces, periodontopathic bacteria and Candida strains tested, but did not inhibit the growth of the oral streptococci that are important in the normal oral flora. … Catalase prevented GEC-induced growth inhibition of Actinomyces naeslundii and Streptococcus mutans suggesting that hydrogen peroxide may be involved in the antimicrobial activity of catechins. …
NAID 130000657773

P-75 抗菌剤配合常温重合レジンの抗菌性の評価 : バイオフィルム初期形成主要菌に対する効果(コンポジットレジン・レジン2,一般講演(ポスター発表),第54回日本歯科理工学会学術講演会)

桐山喬至,朝倉正紀,佐藤大和,濱島聡一郎,黒木健次郎,長谷川彰人,高橋好文,河合達志
歯科材料・器械 28(5), 321, 2009-09-10
… Streptococcus mutans, Streptococcus oralis, Streptococcus gordonii, Actinomyces naeslundii and Candida albicans were used in this study. …
NAID 110007381699

「アクチノミセス・ネスルンディ」

Actinomyces naeslundii
	Histopathological changes due to A. naeslundii.
Scientific classification
Kingdom:	Bacteria
Phylum:	Actinobacteria
Order:	Actinomycetales
Family:	Actinomycetaceae
Genus:	Actinomyces
Species:	A. naeslundii
Binomial name
	Actinomyces naeslundii; Thompson & Lovestedt 1951

　　[★]

ラ: Actinomyces naeslundii

「naeslundii」

　　[★]

Actinomyces naeslundii

[Sarkonen-1] Nanna Sarkonen (August 2007). "Oral Actinomyces Species in Health and Disease: Identification, Occurrence and Importance of Early Colonization" (PDF). National Public Health Institute, Helsinki, Finland. Retrieved 24 July 2016.

[AfricaNel2014-2] Africa, Charlene; Nel, Janske; Stemmet, Megan (2014). "Anaerobes and Bacterial Vaginosis in Pregnancy: Virulence Factors Contributing to Vaginal Colonisation". International Journal of Environmental Research and Public Health. 11 (7): 6979–7000. ISSN 1660-4601. PMC 4113856 . PMID 25014248. doi:10.3390/ijerph110706979.

[Henssge2009-3] Henssge, U.; Do, T.; Radford, D. R.; Gilbert, S. C.; Clark, D.; Beighton, D. (2009). "Emended description of Actinomyces naeslundii and descriptions of Actinomyces oris sp. nov. And Actinomyces johnsonii sp. nov., previously identified as Actinomyces naeslundii genospecies 1, 2 and WVA 963". International Journal of Systematic and Evolutionary Microbiology. 59 (3): 509–16. PMC 2884933 . PMID 19244431. doi:10.1099/ijs.0.000950-0.

[4] Quinonez JM. "Pediatric Actinomycosis". Medscape. Retrieved 22 May 2016.

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案内

Actinomyces naeslundii