Bacteroides Melaninogenicus
Mostrando 1-12 de 119 artigos, teses e dissertações.
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1. "Cara inchada" dos bovinos, uma periodontite infecciosa, aparentemente desencadeada por antibióticos do solo
O objetivo desta revisão das pesquisas sobre a "cara inchada" dos bovinos (CI), realizadas no decorrer dos últimos 30 anos, é de elucidar melhor a sua etiologia. A CI geralmente tem sido considerada de origem nutricional, causada primariamente por deficiência ou desequilíbrio mineral. A doença caracteriza-se por uma periodontite rapidamente progressiva
Pesquisa Veterinária Brasileira. Publicado em: 2000-06
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2. Rapid detection and identification of Bacteroides fragilis and Bacteroides melaninogenicus by immunofluorescence.
Bacteroides fragilis group and Bacteroides melaninogenicus group fluorescent-antibody kits were evaluated with 188 clinical specimens and 116 fresh aerobic and anaerobic bacterial isolates. Fluorescent-antibody and culture results corresponded in 88% of clinical specimens of the B. fragilis group and 94% of clinical specimens of the B. melaninogenicus group.
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3. Black-pigmented Bacteroides spp. in the human oral cavity.
Five healthy children under 6 years of age, five healthy adults, and 10 adult periodontitis patients were examined for the prevalence and distribution of black-pigmented Bacteroides in the oral cavity. A total of 13 samples was obtained from each individual, including four supragingival and four subgingival dental plaques, dental occlusal surface, buccal muc
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4. Effects of estradiol and progesterone on Bacteroides melaninogenicus and Bacteroides gingivalis.
Bacteroides melaninogenicus subsp. intermedius increases in the subgingival microflora during pregnancy. These studies evaluated direct interactions between hormonal steroids and oral Bacteroides species. Resting cell suspensions of pure cultures of plaque organisms were incubated anaerobically with [14C]estradiol and [14C]progesterone. Uptake of labeled com
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5. Antigenic Studies of Oral and Nonoral Black-Pigmented Bacteroides Strains
Antigens of several oral and nonoral strains of Bacteroides asaccharolyticus (proposed classification of oral B. asaccharolyticus, Bacteroides gingivalis), Bacteroides melaninogenicus subsp. intermedius, B. melaninogenicus subsp. melaninogenicus, and B. melaninogenicus subsp. levii were identified in soluble preparations obtained by sonication, autoclaving,
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6. Determination of Bacteroides melaninogenicus Serogroups by Fluorescent Antibody Staining
Fluorescein isothiocyanate-labeled antibody reagents (conjugates) were prepared to one strain of each of the three subspecies of Bacteroides melaninogenicus: B. melaninogenicus subsp. melaninogenicus, B. melaninogenicus subsp. asaccharolyticus, and B. melaninogenicus subsp. intermedius. These three conjugates were specific; thus, they provided a new serologi
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7. Long-wave UV light fluorescence for identification of black-pigmented Bacteroides spp.
Black-pigmented Bacteroides strains were grown on blood agar, and the colonies were evaluated for fluorescence from long-wave UV light. Most test strains of Bacteroides melaninogenicus subsp. intermedius exhibited a brilliant red fluorescence. B. melaninogenicus subsp. melaninogenicus fluoresced mostly red-orange. Bacteroides asaccharolyticus showed a yellow
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8. Ultraviolet Red Fluorescence of Bacteroides melaninogenicus
Under longwave ultraviolet light, Bacteroides melaninogenicus fluoresced vivid red on blood-agar plates as well as in chronic cutaneous ulcers and purulent drainage.
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9. Evaluation of Fluoretec-M for detection of oral strains of Bacteroides asaccharolyticus and Bacteroides melaninogenicus.
Fluoretec-M is a polyvalent conjugate used in direct fluorescent-antibody staining for identification of the Bacteroides asaccharolyticus-Bacteroides melaninogenicus group. The Fluoretec-M reagent detected all oral and nonoral test strains of B. melaninogaenicus subsp. intermedius, all test strains of B. melaninogenicus subsp. melaninogenicus, and the nonora
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10. Bacteriocin-like substance (melaninocin) from oral Bacteroides melaninogenicus.
A bacteriocin-like substance, designated melaninocin, was extracted from a strain of Bacteroides melaninogenicus by ultrasonic treatment and purified. Melaninocin was heat labile and was destroyed by digestion by several proteolytic enzymes. Among the oral indigenous microorganisms, Bacteroides, Actinomyces, and streptococci were found to be sensitive to mel
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11. Humoral immune response to oral microorganisms in periodontitis.
Serum antibody titers from patients with periodontitis were compared with those from periodontally healthy subjects. With the micro-enzyme-linked immunosorbent assay, immunoglobulin G (IgG), IgA, and IgM antibody titers to isolates of Streptococcus sanguis, Actinomyces viscosus, Bacteroides gingivalis, Bacteroides melaninogenicus subsp. intermedius, Bacteroi
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12. Casamino acids enhance growth of Bacteroides melaninogenicus.
Casamino Acids enhance the growth of Bacteroides melaninogenicus when added to various concentrations of Trypticase. Absence of a peptide, not amino acids, is responsible for the inability of Casamino Acids to support growth.