| Revista: | The brazilian journal of infectious diseases |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000290858 |
| ISSN: | 1413-8670 |
| Autores: | Salgado, Maristela Marques1 Pignatari Ac2 Bellinati-Pires, R |
| Instituciones: | 1Instituto Adolfo Lutz, Secao de Imunologia, Sao Paulo. Brasil 2Universidade Federal de Sao Paulo, Departamento de Doencas Infecciosas e Parasitarias, Sao Paulo. Brasil |
| Año: | 2004 |
| Periodo: | Feb |
| Volumen: | 8 |
| Número: | 1 |
| Paginación: | 80-89 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Caso clínico |
| Resumen en inglés | Staphylococcus aureus is a pathogen that has been associated with nosocomial infections since the preantibiotic era. Since the introduction of antibiotics in medical practice in the 1940 s, methicillin-resistant S. aureus (MRSA) strains have been emerging in various parts of the world. In view of the important role of the phagocytic system in the defense against this bacteria, we decided to study phagocytosis by neutrophils and monocytes of an epidemic MRSA strain in São Paulo, Brazil, in comparison with methicillin-sensitive strains. Complement system opsonins are fundamental for efficient ingestion of the resistant and sensitive strains by both types of phagocytes. We found no association of the opsonic requirement of the MRSA strain with the multiresistance phenotype. On the other hand, the MRSA strain was found to be more resistant to the effector mechanisms of neutrophils than both sensitive strains when opsonized with fresh serum, despite the phagocytosis results. This fact suggests that the intracellular killing of S. aureus is an additional parameter of bacterial virulence, but new approaches must be implemented to study the interactions of this MRSA strain with phagocytes in order to investigate the possible factors involved in its behavior in response to neutrophil effector mechanisms |
| Disciplinas: | Medicina |
| Palabras clave: | Farmacología, Microbiología, Inmunología, Staphylococcus aureus, Fagocitos, Fagocitosis, Epidemias, Resistencia a fármacos, Meticilina |
| Keyword: | Medicine, Microbiology, Pharmacology, Immunology, Staphylococcus aureus, Phagocytes, Phagocytosis, Epidemics, Methicillin, Drug resistance |
| Texto completo: | Texto completo (Ver HTML) |
