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1.
Pediatr. aten. prim ; 22(88): 391-394, oct.-dic. 2020. ilus
Article de Espagnol | IBECS | ID: ibc-201444

RÉSUMÉ

La bronquitis bacteriana persistente (BBP) se define como tos húmeda de más de tres semanas de evolución, aislamiento de patógeno en cultivo de una muestra de líquido broncoalveolar y desaparición de la tos con tratamiento con amoxicilina y ácido clavulánico durante al menos dos semanas. Si bien han aumentado el número de casos descritos desde su descripción en 2006, sigue siendo una enfermedad infradiagnosticada a pesar de que el diagnóstico y tratamiento precoz previenen la progresión a formas más graves, que pueden llegar a ser irreversibles. En la literatura se describen múltiples agentes etiológicos, siendo los más frecuentes Haemophilus influenzae no tipable, Streptococcus pneumoniae y Moraxella catarrhalis. No obstante, no hay ningún caso descrito de Alloiococcus otitidis como agente causal de BBP. Este microorganismo se ha aislado principalmente en patología del oído medio


Persistent bacterial bronchitis (PBB) is defined by the presence of wet cough for longer than 3 weeks, isolation of the pathogen in bronchoalveolar cultures and resolution of the cough with treatment with amoxicillin and clavulanic acid for at least two weeks. Although the number of updated cases has increased since its description in 2006, it remains an underdiagnosed disease despite the fact that early diagnosis and treatment prevents the evolution to more serious forms which can become irreversible. Multiple etiologic agents are found in the literature, the most frequent are non-typable Haemophilus influenzae, Streptococcus pneumoniae and Moraxella catarrhalis. However, there is no reported case of Alloidococcus otitidis as the causative agent of PBB. This microorganism has been isolated mainly in middle ear pathology


Sujet(s)
Humains , Mâle , Enfant d'âge préscolaire , Carnobacteriaceae/classification , Carnobacteriaceae/isolement et purification , Infections bactériennes à Gram positif/diagnostic , Bronchite/diagnostic , Bronchite/microbiologie
3.
Braz. dent. j ; 23(4): 409-416, 2012. ilus, tab
Article de Anglais | LILACS | ID: lil-658019

RÉSUMÉ

The objective of the present study was to evaluate the bacterial diversity in the saliva of patients with different oral hygiene indexes using of two 16S rRNA gene libraries. Each library was composed of samples from patients with different averages of the differentiated Silness-Löe biofilm index: the first library (A) with an index between 1.0 and 3.0 (considered a high index) and the second library (B) between 0 and 0.5 (considered a low index). Saliva DNA was extracted and the 16S rRNA gene was amplified and cloned. The obtained sequences were compared with those stored at NCBI and RDP GenBank. The saliva of patients with high index presented five known genera - Streptococcus, Granulicatella, Gemella, Veillonella and Peptostreptococcus - and 33.3% of nonculturable bacteria grouped into 23 operational taxonomic units (OTUs). The saliva of patients with low index differed significantly from the first library (p=0.000) and was composed of 42 OTUs distributed into 11 known genera - Streptococcus, Granulicatella, Gemella, Veillonella, Oribacterium, Haemophilus, Escherichia, Neisseria, Prevotella, Capnocytophaga, Actinomyces - including 24.87% of nonculturable bacteria. It was possible to conclude that there is greater bacterial diversity in the saliva of patients with low dental plaque in relation to patients with high dental plaque.


O objetivo do presente estudo foi avaliar a diversidade bacteriana da saliva de pacientes com diferentes índices de higiene bucal através da construção de duas bibliotecas do gene 16S rRNA. Cada biblioteca foi composta por amostras de saliva de pacientes com índice de biofilme dental de Silness-Löe diferenciado, sendo a primeira (A) com índice de 1,0 a 3,0 (denominada de alto índice) e a segunda (B), entre 0 a 0,5 (denominada de baixo índice). O DNA da saliva foi extraído e o gene 16S rRNA foi amplificado, clonado e sequenciado. As sequências obtidas foram comparadas com aquelas armazenadas no GenBank do NCBI e RDP. A saliva de pacientes com alto índice de biofilme dental apresentou cinco gêneros conhecidos: Streptococcus, Granulicatella, Gemella, Veillonella e Peptostreptococcus e 33,3% de bactérias não-cultivadas, agrupados em 23 unidades taxonômicas operacionais (UTOs). A saliva de pacientes com baixo índice de biofilme dental, foi diferente significativamente da primeira (p=0,000) e foi composta de 42 UTOs, distribuídas em 11 gêneros conhecidos: Streptococcus, Granulicatella, Gemella, Veillonella, Oribacterium, Haemophilus, Escherichia, Neisseria, Prevotella, Capnocytophaga, Actinomyces, além de 24,87% de bactérias não-cultivadas. Pode-se concluir que existe maior diversidade bacteriana na saliva de pacientes com baixo índice de biofilme dental em relação a pacientes com alto índice de biofilme dental.


Sujet(s)
Adulte , Sujet âgé , Femelle , Humains , Mâle , Adulte d'âge moyen , Jeune adulte , Bactéries/classification , Biofilms/classification , Indice d'hygiène buccale , Salive/microbiologie , Actinomyces/classification , Capnocytophaga/classification , Carnobacteriaceae/classification , Escherichia/classification , Banque de gènes , Gemella/classification , Haemophilus/classification , Microbiote , Neisseria/classification , Indice parodontal , Peptostreptococcus/classification , Prevotella/classification , ARN bactérien/analyse , /analyse , Streptococcus/classification , Veillonella/classification
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