Genus Clostridium
Rods, usually Gram-positive, the majority of species form oval/spherical endospores that usually
distend the cell, usually catalase negative, most species are obligately anaerobic, although
tolerance to oxygen varies widely, growth is most rapid at pH 6.5-7 and 30-37 ºC. The spores
resist 10 min. at 80 ºC. Clostridium spp. are resistant at colistin and sensitive to vancomycin.
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PROKARYOTAE
Clostridium absonum  (see C. sardiniense)
Clostridium acetobutylicum
Clostridium acidurici *
Clostridium aldenense *
Clostridium algidicarnis
Clostridium algidixylanolyticum
Clostridium aminophilum *
Clostridium aminovalericum
Clostridium argentinense
Clostridium aurantibutyricum
Clostridium baratii
Clostridium barkeri *  (moved to genus Eubacterim)
Clostridium beijerinckii
Clostridium bifermentans
Clostridium bryantii * (moved to genus Syntrophomonas)
Clostridium bolteae
Clostridium botulinum
Clostridium bowmanii
Clostridium butyricum
Clostridium cadaveris
Clostridium caenicola
Clostridium caminithermale
Clostridium carnis
Clostridium celatum
Clostridium celerecrescens
Clostridium cellobioparum
Clostridium cellulofermentans
Clostridium cellulolyticum
Clostridium cellulosi
Clostridium chauvoei
Clostridium citroniae *
Clostridium clostridioforme
Clostridium cochlearium
Clostridium cocleatum
Clostridium colicanis
Clostridium colinum
Clostridium difficile
Clostridium disporicum
Clostridium durum * (moved to genus Paenibacillus)
Clostridium estertheticum subsp. estertheticum *
Clostridium estertheticum subsp. laramiense
Clostridium fallax
Clostridium felsineum
Clostridium ghonii
Clostridium glycolicum
Clostridium haemolyticum
Clostridium hastiforme * (synonym of Tissierella preacuta)
Clostridium herbivorans
Clostridium hiraronis
Clostridium histolyticum
Clostridium hylemonae
Clostridium indolis
Clostridium innocuum
Clostridium intestinale
Clostridium isatidis
Clostridium lacusfryxellense
Clostridium limosum
Clostridium lituseburense
Clostridium lortetii * (moved to genus Sporohalobacter)
Clostridium malenominatum
Clostridium mangenotii
Clostridium nexile
Clostridium novyi
Clostridium oceanicum
Clostridium orbiscindens  (see Flavonifractor plautii)
Clostridium oroticum
Clostridium oxalicum * (moved to genus Oxalophagus)
Clostridium papyrosolvens
Clostridium paraperfringens  (see C. baratii)
Clostridium paraputrificum
Clostridium pascui
Clostridium pasteurianum
Clostridium perfringens
Clostridium propionicum
Clostridium pseudotetanicum  (see C. butyricum)
Clostridium psychrophilum
Clostridium puniceum
Clostridium putrefaciens
Clostridium ramosum
Clostridium rectum
Clostridium roseum
Clostridium saccharobutylicum
Clostridium saccharolyticum
Clostridium saccharoperbutylacetonicum
Clostridium sardiniense
Clostridium sartagoforme
Clostridium scatologenes
Clostridium scindens
Clostridium septicum
Clostridium sordellii
Clostridium sporogenes  (see also C. botulinum)
Clostridium sphenoides
Clostridium spiriforme
Clostridium sporosphaeroides
Clostridium sticklandii
Clostridium subterminale  (see also C. botulinum)
Clostridium symbiosum
Clostridium termitidis *
Clostridium tertium
Clostridium tetani
Clostridium tetanomorphum
Clostridium tyrobutyricum
Clostridium villosum * (moved to genus Filifactor)
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LEGEND
* marked species are not included
in ABIS biochemical database
NOTES

Clostridium pseudotetanicum appears
to be a later synonym of
Clostridium
butyricum
, pending confirmation by
DNA–DNA homology determinations.

Carlier et al. 2010 proposed to
unify
Clostridium orbiscindens
and Eubacterium plautii in the
new genus Flavonifractor as
Flavonifractor plautii.

According to Wang et al. 2005,
Clostridium absonum
is a later
heterotypic synonym of
Clostridium
sardiniense

According to Bae et al. 2004,
Clostridium hastiforme
is a later
heterotypic synonym of
Tissierella
praeacuta

According to Cato et al. 1982,
Clostridium paraperfringens  
is a later
heterotypic synonym of
Clostridium
baratii
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