RESUMO
Resistance to minocycline has emerged in multidrug-resistant Acinetobacter baumannii isolates from Buenos Aires hospitals. Few reports about the description and dispersion of tet genes in this species have been published. We observed the presence of tet(B) in all minocycline-resistant isolates. This gene was found to be associated with the ISCR2 mobile element, which may, in part, explain its dispersion.
Assuntos
Infecções por Acinetobacter/microbiologia , Acinetobacter baumannii/genética , Antibacterianos/uso terapêutico , Minociclina/uso terapêutico , Plasmídeos , Resistência a Tetraciclina/genética , Infecções por Acinetobacter/tratamento farmacológico , Infecções por Acinetobacter/epidemiologia , Acinetobacter baumannii/isolamento & purificação , Antibacterianos/farmacologia , Argentina/epidemiologia , Sequência de Bases , Humanos , Testes de Sensibilidade Microbiana , Minociclina/farmacologia , Dados de Sequência Molecular , Retroelementos , Análise de Sequência de DNARESUMO
We report the first case of fulminant sepsis due to Wohlfahrtiimonas chitiniclastica. This case is also the first one reported in South America. We emphasize the importance of recognizing bacteria that live in the larvae of a parasitic fly as the causative agent of severe infections in homeless patients.
Assuntos
Infecções por Bactérias Gram-Negativas/diagnóstico , Sepse/microbiologia , Xanthomonadaceae/isolamento & purificação , Idoso , Animais , Antibacterianos/farmacologia , Técnicas de Tipagem Bacteriana , Análise por Conglomerados , DNA Bacteriano/química , DNA Bacteriano/genética , DNA Ribossômico/química , DNA Ribossômico/genética , Dípteros/microbiologia , Infecções por Bactérias Gram-Negativas/microbiologia , Pessoas Mal Alojadas , Humanos , Masculino , Testes de Sensibilidade Microbiana , Dados de Sequência Molecular , Filogenia , RNA Ribossômico 16S/genética , Análise de Sequência de DNA , América do Sul , Xanthomonadaceae/classificação , Xanthomonadaceae/genética , Xanthomonadaceae/fisiologiaRESUMO
INTRODUCTION: Acute pancreatitis (AP) is usually a mild and self-limiting disease, but some patients develop a severe form that is associated with high mortality. In AP, local inflammation is followed first by the systemic inflammatory response syndrome and then by the compensatory anti-inflammatory response syndrome, which is defined by low human leukocyte antigen (HLA)-DR expression on monocytes, increased concentration of the anti-inflammatory cytokine IL-10, and decreased monocyte function. Our aim was to measure the expression of triggering receptor expressed on myeloid cells (TREM)-1 (a proposed marker of infection or inflammation) and HLA-DR on monocytes, and the serum concentrations of IL-6 (a proinflammatory cytokine) and IL-10 in patients with AP to determine whether these markers can identify patients at high risk of developing severe AP or infection. METHODS: Fifty healthy volunteers, 18 patients with mild AP, and 11 patients with severe AP were included in this study. Samples were taken at admission and one and three days later. TREM-1 and HLA-DR expression was evaluated by flow cytometry, and soluble TREM-1, IL-6 and IL-10 concentrations were measured by ELISA. RESULTS: TREM-1 expression was higher in patients with AP than in healthy volunteers, but there was no difference between patients with mild and severe AP. TREM-1 expression was not associated with mortality or with the presence of infection. Soluble TREM-1 concentration in serum was higher in non-survivors than in survivors. HLA-DR expression was lower and IL-6 concentration higher in patients with severe AP and in infected patients. CONCLUSIONS: Increased TREM-1 expression was associated with the presence of inflammation but not infection in AP. In patients with AP, low HLA-DR expression and high IL-6 concentration could predict severity and infection in samples taken shortly after admission.