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Class | Active | Resistant |
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This is a common and beneficial inhabitant of the gut.
Fuel sources used:
It can use fibre, resistant starch, and simple sugars (including lactose) for energy.
Metabolites produced:
Our genomic analysis indicates that most members of this species can produce the following metabolites: acetate, BCAAs, GABA, lactate, propionate, succinate, folate.
Metabolites consumed:
In addition, our genomic analysis indicates that most members of this species do not consume any reported metabolites.
Emerging research:
Low levels of this species have been observed in Crohn's disease, obesity and celiac disease.
Bifidobacterium adolescentis ATCC 15703, a gut bacteria, has been associated with allergic individuals in some clinical studies. [PMID: 29633635]
Has extensive capabilities to metabolize diet-derived glycans, in particular starch and starch-related/derived poly- and oligo-saccharides, such as amylopectin, pullulan, maltotriose and maltodextrin. [PMID: 27035119] The analysis of the 2,203,222-bp genome of Bifidobacterium adolescentis 22L revealed a nutrient acquisition strategy that targets diet/plant-derived glycans, in particular starch and starch-like carbohydrates. Starch-like carbohydrates were shown to support the growth of B. adolescentis 22L. [PMID: 25063659] Isolated from human milk. [PMID: 27035119]
Bifidobacterium adolescentis administration to rats significantly lowered rates of bacterial translocation. Bifidobacteria have also been associated with metabolic improvements considered to be associated with inflammation, including insulin sensitivity, white fat accumulation, liver weight, reactive oxygen species, nuclear factor _B activation, and reduced markers of inflammation, and high-density lipoprotein (HDL) plasma cholesterol levels. [PMID: 29954454] The colon region of the human gut contains mainly anaerobic microbes, such as Bifidobacterium spp. The proportion of bifidobacteria is known to play a significant role in the maintenance of good health, but this role diminishes as the individual reaches adulthood1. [PMID: 30093677] This strain was isolated from human feces of a centenarian. [PMID: 25678139]
Bifidobacteria are common inhabitants of the human gastrointestinal tract that, despite a long history of research, have not shown any pathogenic potential whatsoever. By contrast, some bifidobacteria are associated with a number of health-related benefits for the host. The reported beneficial effects of bifidobacteria include competitive exclusion of pathogens, alleviation of symptoms of irritable bowel syndrome and inflammatory bowel disease, and modulation of intestinal and systemic immune responses. Based on these effects, bifidobacteria are widely used as probiotics by pharmaceutical and dairy industries. [PMID: 27547201] This species is a normal inhabitant of the healthy human gut. Newborns, especially those that are breast-fed, are colonized with Bifidobacteria within days after birth. This species was first isolated from the feces of a breast-fed infant. The population of these bacteria in the colon appears to be relatively stable until late adulthood when it appears to decline. In one comprehensive 16S rDNA sequence-based enumeration of the colonic microbiota of three healthy adult humans it represents, on average, 0.008% of all 16S rDNA sequences and 4.302% of the sequences in its division (Eckburg et. al. (2005)). The bifidobacteria population is influenced by a number of factors, including diet, antibiotics and stress. Their name is derived from the observation that they often exist in a Y-shaped or bifid form. They are saccharolytic organisms that produce acetic and lactic acids without generation of CO2, except during degradation of gluconate. [https://www.ncbi.nlm.nih.gov/genome/?term=Bifidobacterium%20adolescentis[Organism]&cmd=DetailsSearch]
Bifidobacterium adolescentis represents 0.008% of the total number of microbial 16S rDNA sequences found in the gut. [UP000008702]
Reuter, G. (1963). Comparative studies on the bifidus flora in the feces of infants and adults. With a contribution to classification and nomenclature of bifidus strains. Zentralblatt für Bakteriologie, Parasitenkunde, Infektionskrankheiten und Hygiene. 1. Abt. Medizinisch-hygienische Bakteriologie, Virusforschung und Parasitologie. Originale, 191, 486–507.
Lineage | Physiology | General | Growth Tolerances | Hydrol./digest./degr. |
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Health:
Positive
Source: human faeces
DNA G+C(%): 61.2
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Monosaccharide O/F | Oligosaccharide O/F | Polysaccharide O/F | Polyol O/F | Other O/F |
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Monosaccharide util/assim | Oligosaccharide util/assim | Other carboh. util/assim | Amino acid util/assim | Organic acid util/assim |
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Enzymes: General | Enzymes: Carbohydrate | Enzymes: Protein | Enzymes: Arylamidases | Enzymes: Esters/fats |
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Fuel | Usable Metabolites | Metabolites Released | Special Products | Compounds Produced |
Fibre, Complex Polysacc., Starch, Resistant Starch, Simple Sugars, Lactose |
None/Unknown |
Branched-Chain AA, Folate, Lactate, Propionate, Succinate, GABA |
None/Unknown |
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Penicillins & Penems (μg/mL) | Cephalosporins (μg/mL) | Aminoglycosides (μg/mL) | Macrolides (μg/mL) | Quinolones (μg/mL) |
amoxicillin: Sens
Augmentin: S(MIC50): 0.032, MIC90: 0.5, RNG: (0.016-0.5)
ampicillin: S(MIC50): 0.06, MIC90: 0.25, RNG: (0.06–1)
amp-sulb: S(MIC50): 0.06, MIC90: 0.125, RNG: (0.06–1)
azlocillin: Sens
aztreonam: Res
bacampicillin: Sens
benzyl-pen: Sens
cloxacillin: Sens
dicloxacillin: Sens
oxacillin: Sens
penicillin: Var(MIC50): 0.125, MIC90: >32, RNG: (0.016->32)
penicillin_G: S(MIC50): 0.17, MIC90: 0.35, RNG: (0.02-0.60)
piperacillin: Sens
piper-taz: S(MIC50): 0.06, MIC90: 0.5, RNG: (≤0.03-1)
ticarcillin: Sens
imipenem: S(MIC50): 0.06, MIC90: 0.125, RNG: (0.015–0.25)
meropenem: Sens
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cefaclor: Sens
cefadroxil: Res
cefazolin: Sens
cefdinir: Sens
cefepime: Sens
cefixime: Sens
cefmetazole: Sens
cefoperazone: Sens
cefotaxime: Sens
cefotetan: Sens
cefotiam: Sens
cefoxitin: S(MIC50): 1, MIC90: 4, RNG: (0.06–32)
ceftazidime: Sens
cefuroxime: Sens
cephalothin: Sens
moxalactam: Sens
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amikacin: Res
dihydrostrept: Res
gentamicin: R(MIC50): 175, MIC90: 500, RNG: (40->500)
kanamycin: R(MIC50): 261, MIC90: 501, RNG: (100->1500)
neomycin: R(MIC50): 36, MIC90: 397, RNG: (20-500)
sisomicin: Res
spectinomycin: Res
streptomycin: R(20-1500)
tobramycin: Res
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azithromycin: Sens
erythromycin: S(MIC50): 0.06, MIC90: 0.06, RNG: (≤0.03-0.25)
fidaxomicin: S(MIC50): 0.125, MIC90: 0.125, RNG: (0.03–0.25)
clarithromycin: Sens
pristinamycin: Sens
quin-dalf: S(MIC50): 1, MIC90: 1, RNG: (0.25-2)
roxithromycin: Sens
spiramycin: Sens
telithromycin: Sens
josamycin: Sens
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linezolid: S(MIC50): 1, MIC90: 1, RNG: (0.25–2)
ciprofloxacin: Sens
clavulanate: Res
clinafloxacin: Sens
enoxacin: Res
gatifloxacin: Sens
levofloxacin: Var(MIC50): 0.5, MIC90: 16, RNG: (0.25->32)
moxifloxacin: S(MIC50): 0.125, MIC90: 1, RNG: (0.064-4)
nalidixic-acid: R(>200)
norfloxacin: Sens
ofloxacin: Sens
pefloxacin: Res
pipemidic_acid: S,R
sarafloxacin: Sens
sparfloxacin: Sens
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Tetracyclines (μg/mL) | Vancomycin Class (μg/mL) | Polypep/ketides (μg/mL) | Heterocycles (μg/mL) | Other (μg/mL) |
doxycycline: S(MIC50): 0.25, MIC90: 4, RNG: (0.032-16)
chlortetracycline: Sens
meclocycline: Sens
methacycline: Sens
minocycline: Sens
oxytetracycline: Sens
tetracycline: S(MIC50): 3, MIC90: 3, RNG: (3)
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teicoplanin: S(MIC50): 0.25, MIC90: 0.5, RNG: (0.125–0.5)
vancomycin: S(MIC50): 0.5, MIC90: 1, RNG: (0.25-1)
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bacitracin: S(MIC50): <0.05, MIC90: 0.47, RNG: (0.05-0.60)
rifabutin: Sens
rifampicin: Sens
rifapentine: Sens
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chloramphenicol: S(MIC50): 2.6, MIC90: 4.3, RNG: (2.0-5.0)
isoniazid: Res
metronidazole: Var(MIC50): 8, MIC90: >64, RNG: (1–>64)
nitrofurantoin: Var(MIC50): <27, MIC90: 73, RNG: (15-100)
sulfadiazine: Res
sulfadimethoxine: Res
sulfamethoxazole: Res
sulfanilamide: Res
trimethoprim: Sens
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clindamycin: Var(MIC50): 0.032, MIC90: >256, RNG: (0.016->256)
lincomycin: S(MIC50): 0.76, MIC90: 2.9, RNG: (0.30-6)
daptomycin: S(MIC50): 0.25, MIC90: 0.5, RNG: (≤0.03-1)
colistin: Res
polymyxin_B: R(>700)
fusidic-acid: Sens
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