
The Actinomycetales are an order of Actinobacteria. They are very diverse and contain a variety of subdivisions, as well as yet-unclassified isolates, mainly because some genera are very difficult to classify because of a highly niche-dependent phenotype. For example Nocardia contains several phenotypes first believed to be distinct species before...
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http://en.wikipedia.org/wiki/Actinomycetales

An order of gram-positive, primarily aerobic bacteria that tend to form branching filaments. ... (12 Dec 1998) ...
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http://www.encyclo.co.uk/local/20973

Order of Gram positive bacteria, widespread in soil, compost, and aquatic habitats. Most are saprophytic, but there are a few pathogens; some produce important antibiotics. Important genera include: Actinomyces, Corynebacterium, Frankia, Mycobacterium, Streptomyces .
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Type: Term Pronunciation: ak′ti-nō-mī-sē-tā′lēz Definitions: 1. An order of bacteria consisting of moldlike, rod-shaped, clubbed, or filamentous forms with decided tendency to true branching, without endospores, but sometimes developing conidia; it includes the families Mycobacteriaceae, Actinomycetaceae, and No...
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http://www.medilexicon.com/medicaldictionary.php?t=940

[
n] - filamentous or rod-shaped bacteria
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http://www.webdictionary.co.uk/definition.php?query=Actinomycetales
order Actinomycetales noun filamentous or rod-shaped bacteria
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https://www.encyclo.co.uk/local/20974
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