Neisseria Lactamica
Mostrando 1-12 de 62 artigos, teses e dissertações.
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1. Cinética do cultivo de Neisseria lactamica em biorreator. / Bioreactor cultivation kinetics of Neisseria lactamica.
Neisseria lactamica está envolvida na aquisição da imunidade natural contra Neisseria meningitidis, causadora da doença meningocócica. Vesículas de membrana externa (OMV) de N. lactamica são antígenos potenciais contra N. meningitidis. Analisou-se a cinética de biomassa, de produção de OMV, da fonte de carbono (lactato), e dos metabólitos, para m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012
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2. Study of immunogenicity of Neisseria lactamica antigens: use of monoclonal antibodies. / Estudo da imunogenicidade de antígenos de Neisseria lactamica: utilização de anticorpos monoclonais.
Immunological and epidemiological evidences suggest that the development of natural immunity to meningogoccal disease may be associated with crossreactive antigens together with Neisseria meningitidis and other commensal bacteria, like Neisseria lactamica. The present study aimed to investigate the immunogenicity of antigens of outer membrane vesicles (OMV)
Publicado em: 2008
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3. Neisseria lactamica and Neisseria meningitidis share lipooligosaccharide epitopes but lack common capsular and class 1, 2, and 3 protein epitopes.
Neisseria lactamica, a common human pharyngeal commensal, contributes to acquired immunity to Neisseria meningitidis. To define the surface antigens shared between these two species, we used monoclonal antibodies (MAbs) to study 35 N. lactamica strains isolated in various parts of the world for cross-reactivity with meningococcal capsules, outer membrane pro
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4. Septicemia due to Neisseria lactamica.
Neisseria lactamica was isolated from the blood of a pediatric patient who had signs of septicemia and otitis media. Organisms morphologically resembling Neisseria, as well as gram-positive cocci, were seen on a Gram stain of fluid from the middle ear. It is hypothesized that the N. lactamica septicemia was secondary to infection of the middle ear by this or
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5. Neisseria lactamica and Neisseria polysaccharea as possible sources of meningococcal beta-lactam resistance by genetic transformation.
We studied the susceptibilities of relatively penicillin G-resistant and -susceptible strains of Neisseria meningitidis, as well as Neisseria lactamica and Neisseria polysaccharea, to penicillin, ampicillin, and several cephalosporins. The MICs of penicillin, ampicillin, cephalothin, and cefuroxime for moderately resistant meningococci have increased two- to
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6. Isolation of Neisseria lactamica from the female genital tract. A case report.
Neisseria lactamica was isolated from the genital tract of a young patient with a persistent vaginal discharge. Although infection with N lactamica occurs very rarely, the importance of complete biochemical identification of neisseriae is emphasised in view of the serious social and medicolegal consequences which could result from a misdiagnosis of gonorrhoe
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7. Homology of cryptic plasmid of Neisseria gonorrhoeae with plasmids from Neisseria meningitidis and Neisseria lactamica.
DNA probe hybridisation was used to examine the relation between the cryptic plasmid from Neisseria gonorrhoeae and plasmids carried by pharyngeal isolates of Neisseria meningitidis and Neisseria lactamica. The complete gonococcal cryptic plasmid and HinfI derived digestion fragments subcloned into Escherichia coli were used to probe Southern blots of plasmi
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8. Neisseria lactamica Protects against Experimental Meningococcal Infection
Immunological and epidemiological evidence suggests that the development of natural immunity to meningococcal disease results from colonization of the nasopharynx by commensal Neisseria spp., particularly with N. lactamica. We report here that immunization with N. lactamica killed whole cells, outer membrane vesicles, or outer membrane protein (OMP) pools an
American Society for Microbiology.
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9. Neisseria lactamica septicemia in an immunocompromised patient.
Neisseria lactamica was isolated from the blood of a 7-year-old girl who was immunosuppressed from chemotherapy for acute lymphocytic leukemia. She was receiving trimethoprim-sulfamethoxazole prophylactically. The isolate was resistant to trimethoprim-sulfamethoxazole and sensitive to penicillin. The patient responded to intravenous penicillin therapy. The o
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10. Genetic Diversity of Neisseria lactamica Strains from Epidemiologically Defined Carriers
We assessed the genetic diversity of 26 Neisseria lactamica strains from epidemiologically related sources, i.e., groups of kindergartens and primary schools in three Bavarian towns, by the partial sequencing of the argF, rho, recA, and 16S ribosomal genes. We found a total of 17 genotypes, of which 12 were found only in one strain. The genotypes comprised 5
American Society for Microbiology.
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11. Two unique restriction endonucleases from Neisseria lactamica.
Two new site-specific endonucleases, N1a III and N1a IV, have been isolated from Neisseria lactamica. N1a III recognizes the sequence, CATG, and cleaves 3' of the sequence to produce a four base 3' extension. N1a IV recognizes the sequence, GGNNCC, and cleaves between the two N's to produce blunt ended fragments.
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12. Comparative Genomics Identifies the Genetic Islands That Distinguish Neisseria meningitidis, the Agent of Cerebrospinal Meningitis, from Other Neisseria Species
Neisseria meningitidis colonizes the nasopharynx and, unlike commensal Neisseria species, is capable of entering the bloodstream, crossing the blood-brain barrier, and invading the meninges. The other pathogenic Neisseria species, Neisseria gonorrhoeae, generally causes an infection which is localized to the genitourinary tract. In order to investigate the g
American Society for Microbiology.