Anaerobic bacteria

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anaerobic bacteria

Bacteria which grow without O2, either by metabolic necessity (obligate anaerobes) or by preference (facultative anaerobes). Anaerobes are the primary pathogens of wound infections. Specimens obtained from patients in whom an anaerobic infection is suspected require special handling, as O2 (i.e., open air) is toxic to cultures and they may present as “culture-negative” if exposed; once the specimen arrives in the lab, it is processed under conditions of decreased O2, and any bacteria identified are recultured to determine their sensitivity to antibiotics.

Anaerobic bacteria

Bacteria that do not require oxgyen, found in low concentrations in the normal vagina

an·aer·ob·ic bac·te·ri·a

(anār-ōbik bak-tērē-ă)
Bacteria that can live and grow in the absence of oxygen. Some anaerobic bacteria are inhibited or killed by oxygen.


the absence of air.

anaerobic bacteria
anaerobic effluent treatment
is usually conducted in deep ponds where air does not penetrate. A fully contained system is also available.
anaerobic exercise
exercise at high work intensity during which the needs of muscle metabolism for oxygen exceeds the capacity of the circulation to supply it and an oxygen debt is incurred.
anaerobic infection
one caused by aerobic organisms.


plural of bacterium.

anaerobic bacteria
derive energy from fermentative processes in the absence of oxygen. Are found in necrotic or abscessed tissues.
cell-wall deficient bacteria
see L-form bacteria (below).
facultatively anaerobic bacteria
are able to derive energy from aerobic or anaerobic metabolism. Includes most intestinal pathogens.
glucose-non-fermenting, gram-negative bacteria
includes Bordetella, Moraxella and Pseudomonas species.
L-form bacteria
abnormal growth forms that can replicate in the form of small filterable elements with defective or absent cell walls. Spontaneously formed by some bacteria, e.g. Streptococcus spp., Bacterioides spp., and by others when synthesis is impaired. L-forms have been associated with infections in dogs and cats.
marker bacteria
those added to provide a means of identifying the bacteria being studied. See serratiarubidaea.
obligate aerobic bacteria
require oxygen as a source of energy and therefore for growth.
putrefactive bacteria
resistant bacteria
see antimicrobial resistance.
ruminal bacteria
the ruminal fluid of the normal cow contains 10 to 50 million million organisms per gram. Bacteria outnumber the protozoan population many times over. The genera and species of bacteria present vary between times in the same cow. The function of the ruminal bacteria is to digest the food taken in and thus allow its absorption. This includes the lysis of cellulose, xylanol, starch, dextrin, pectin, protein, lipids, the utilization of glycerol and lactate, and the fermentation of soluble sugars. The end products of the digestive process include methane, formate, acetate, ethanol, propionate, lactate, butyrate, succinate, valerate, caproate, hydrogen and carbon dioxide.
spoilage bacteria
References in periodicals archive ?
Soki J, Eitel Z, Urban E, Nagy E, ESCMID Study Group on Antimicrobial Resistance in Anaerobic Bacteria.
Appelbaum and Chatterton (11) in 1978, in a study similar to that in South Africa on 265 anaerobic bacteria from clinical isolates, found low levels of resistance to penicillin, chloramphenicol, clindamycin and metronidazole.
5) The isolation of anaerobic bacteria together with aerobic organism at that site is not surprising, since anaerobes are the predominant organisms in GIT where they outnumber aerobes in a ratio of 1,000:1.
The FDA recommends that if physicians suspect infection in patients with this presentation, they should consider immediately initiating treatment with antibiotics that include coverage of anaerobic bacteria, such as Clostridium sordellii.
In the journal article, Rutgers said the researchers detail a way to facilitate the of anaerobic bacteria in cleaning up MTBE by employing carbon isotope fractionation -- the changes in the isotopic ratios of carbon (its different molecular versions, carbon-12 and carbon-13) brought about from the selective degradation of the carbon-12 form in the case of MTBE.
We postulated that the superiority of metronidazole may be due to its activity against anaerobic bacteria.
So, there is a need for additional secondary safety barriers in vacuum-packaged meat products that will help prevent the growth of anaerobic bacteria, such as C.
Additionally, anaerobic bacteria thrive in these new conditions and can cause a number of problems.
Knowledge of the metabolic pathways used by anaerobic bacteria to break down hydrocarbons has allowed us to identify unique intermediate compounds that can be used as biomarkers for in situ activity.
The investigators looked at associations between endometritis and Neisseria gonorrhoeae, Chlamydia trachomatis, anaerobic bacteria, facultative bacteria, lactobacilli, and bacterial vaginosis (BV) in 278 women from the PID Evaluation and Clinical Health Study.
Mild halitosis usually results from anaerobic bacteria breeding in shallow cavities in the gums or teeth.