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Category:Mycobacterium species (view source)
Revision as of 18:55, 1 November 2010
, 18:55, 1 November 2010no edit summary
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+===Overview===
−*Mycobacterial infections are caused by bacteria belonging to the family Mycobacteriaceae, order Actinomycetales
−*Includes obligate pathogens, opportunistic pathogens and saprophytes
−*Cause chronic, progressive, granulomatous infections
−*Cause tuberculosis, [[Johne's Disease|Johne's disease]] and feline leprosy
−*''M. bovis'', ''M. tuberculosis'' and ''M. avium'' cause [[Respiratory Bacterial Infections - Pathology#Tuberculosis|tuberculosis of cattle]], [[Respiratory Bacterial Infections - Pathology#Tuberculosis in pigs|tuberculosis of pigs]] and [[Respiratory Bacterial Infections - Pathology#Tuberculosis in dogs|tuberculosis of dogs]] respectively
−*The 'classical' tuberculosis lesions are caused by the [[Mycobacterium tuberculosis complex]]
−*The Johne's type lesions are caused by the [[Mycobacterium avium complex]]
−*Environmental species are found in soil, vegetation and water
−*''Mycobacterium leprae'' and ''M.lepraemurium'' cause human, feline/murine leprosy respectively
−*Atypical mycobacteriosis is a localized opportunistic skin and subcutaneous infection caused by saprophytic and rapidly growing atypical mycobacteria
−*Granulomatous lesions in [[Muscles Inflammatory - Pathology#Tuberculosis|muscle]] and [[Bacterial skin infections - Pathology#Bacterial granulomatous dermatitis|skin]]
−*Skin tuberculosis of cattle causes nodules along the lymphatics of the limbs
−*Bovine farcy is thought to be caused by ''M. senegalense'' and ''M. farcinogenes''
−*Saprophytic mycobacteria cause granulomatous lesions
−===Characteristics===
−*Aerobic, weakly Gram-positive acid-fast rods
−*Non-motile, non-spore forming
−*Cell walls contain mycolic acid
−*Require egg-based media for growth
−*Slow-growing colonies
−*Resistant to disinfectants and environmental conditions; susceptible to pasteurisation
−*Mycobacteria stain with carbol dyes and resist subsequent decolorization with inorganic acids; this characteristic which is due to the spatial arrangement of mycolic acids within the cell wall makes them acid fast
−===Identification===
−*Identified by Ziehl-Neelson staining
−*Differentiated by culture, biochemical tests, chromatography and molecular techniques
−*Pathogenic species require at least three weeks for growth on egg-based media
−[[Category:To_Do_-_Bacteria]]
{{frontpage
{{frontpage
|pagetitle =Mycobacterium species
|pagetitle =Mycobacterium species
−|pagebody =
+|pagebody = *Mycobacteruim organisms belong to the family Mycobacteriaceae, order Actinomycetales. This class of organism includes obligate pathogens, opportunistic pathogens and saprophytes; they can cause chronic, progressive, granulomatous infections including tuberculosis, [[Johne's Disease|Johne's disease]] and feline leprosy. ''M. bovis'', ''M. tuberculosis'' and ''M. avium'' cause [[Respiratory Bacterial Infections - Pathology#Tuberculosis|tuberculosis of cattle]], [[Respiratory Bacterial Infections - Pathology#Tuberculosis in pigs|tuberculosis of pigs]] and [[Respiratory Bacterial Infections - Pathology#Tuberculosis in dogs|tuberculosis of dogs]] respectively. ''Mycobacterium leprae'' and ''M.lepraemurium'' cause human, feline/murine leprosy respectively. Localized opportunistic [[Bacterial skin infections - Pathology#Bacterial granulomatous dermatitis|skin]] and subcutaneous infection can be caused by saprophytic and rapidly growing atypical mycobacteria.
+Environmental species are found in soil, vegetation and water. Mycobacterium organisms are
+non-motile, non-spore forming weakly Gram-positive acid-fast rods. They require egg-based media for growth, forming slow-growing (three weeks are required for culture) colonies that stain with carbol dyes and resist subsequent decolorization with inorganic acids; this characteristic which is due to the spatial arrangement of mycolic acids within the cell wall makes them acid fast. They are identified by Ziehl-Neelson staining and differentiated by culture, biochemical tests, chromatography and molecular techniques.
+Mycobacterium species are resistant to disinfectants and environmental conditions, but are susceptible to pasteurisation.
|contenttitle =Content
|contenttitle =Content
|contentbody =<big><b>
|contentbody =<big><b>
<categorytree mode=pages>Mycobacterium species</categorytree>
<categorytree mode=pages>Mycobacterium species</categorytree>
</b></big>
</b></big>
−|logo =
+|logo =bugs-logo copy.png
}}
}}
−[[Category:Bacterial Organisms]]
[[Category:Bacterial Organisms]]
[[Category:Gram_positive_bacteria]]
[[Category:Gram_positive_bacteria]]
[[Category:Rods]]
[[Category:Rods]]
−