And during aerobic exposure, LAB still could grow 4-5 days because several strains were classified as aerotolerant
anaerobes, such as L.
Clostridium tertium brain abscess following a lawn dart injury.
Growth pattern in test tubes (uniform turbidity from the bottom to the top of the liquid medium in the test tubes) prior plating suggested presence of aerotolerant
Strains that did not survive aerobic shaking at 200 rpm for 12 h were considered oxygen sensitive; those that survived for [approximately equal to]12-24 h were classified as aerotolerant
, and those that survived for >24 h were classified as hyperaerotolerant (Figure 1).
Lactobacilli are facultative anaerobic (aerotolerant
) bacteria that produce lactic acid via the fermentation of glucose.
The Clostridium genus is comprised of mostly Gram-positive, variably spore-forming anaerobic to aerotolerant
rods in pairs or short chains.
As inflammation usually drives an oxidative state, it might favor the outgrowth of aerotolerant
phyla such as Actinobacteria and Proteobacteria in the gut, one example is the murine pathogen Citrobacter rodentium .
To elucidate the ecological effect of high oral doses of specific gut-indigenous bacterial strains on other commensals early in life, here we conducted a preliminary culture-based study to quantify the effect of an aerobic (aerotolerant
anaerobe with remarkably optimal growth at room air) gut-indigenous Lactobacillus plantarum strain (which we previously isolated from calves with the most potent inhibitory activity against Escherichia coli O157:H7 and F5 and ability to survive acidic conditions and high bile salt concentrations; see ) on the clinical health and gut lactobacilli and coliform populations in the feces and intestinal mucosa of newborn bottle-fed calves, given the clinical relevance of mucosa-associated microbiota .
All LAB grow anaerobically, but unlike most anaerobes, they grow in the presence of [O.sub.2] as "aerotolerant
P freudenreichii is an aerotolerant
organism which cannot use oxygen for growth but can tolerate its presence.
It is an anaerobic organism but is aerotolerant
, even expressing the ability to employ oxidative phosphorylation for energy conservation.
Clostridium septicum is a large, Gram-positive, aerotolerant
, gas-producing bacillus with subterminal spores.