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 ?
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.
This smell is actually hydrogen sulfide -- or sometimes methane -- both products of anaerobic bacteria.
Finally, participating laboratories will perform a quality certification for the rapid identification of anaerobic bacteria with excellent quality using classical detection methods and MALDI-TOF MS.
To obtain clinical diagnoses and safeguard patient health, modern clinical laboratories must ensure accurate, timely isolation and identification of anaerobic bacteria and related organisms.
Moreover, circumcision-associated physiological changes of the penis - including lower moisture and oxygen availability around the head of the penis - may reduce the number of pro-inflammatory anaerobic bacteria that could make the target immune cells more vulnerable to HIV infection.
Anaerobic bacteria are bugs that grow in air and water.
A qualified water well system contractor can determine if the water well system needs cleaning by conducting an anaerobic bacteria test, a coliform test, or other tests that indicate an accumulation of debris in the well.
Amongst the group of microorganisms assayed, aerobic bacteria had the highest population followed by fungi and anaerobic bacteria in that order.
The extracts and compounds were tested against 29 aerobic and anaerobic bacteria and yeasts in the agar dilution test.
Levofloxacin, the bacteriologically active isomer of ofloxacin, is used in the treatment of infections caused by periodontopathic bacteria and facultative anaerobic bacteria.
Both group A streptococci and a combination of aerobic and anaerobic bacteria have been implicated as causes.
We use a patented oxygenating compound that attacks the anaerobic bacteria, which produces sulfur compounds," says Dr.