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Enferm. infecc. microbiol. clín. (Ed. impr.) ; 33(6): 391-396, jun.-jul. 2015. tab
Artigo em Inglês | IBECS | ID: ibc-142121

RESUMO

INTRODUCTION: Staphylococcus aureus and Staphylococcus pseudintermedius are highly important due to their capacity for producing diseases in humans and animals, respectively. The aim of the study was to investigate and characterize the coagulase positive Staphylococcus (CoPS) carriage in a Primary Healthcare Center population. METHODS: Nasal swabs were obtained from 281 non-infectious patients. The CoPS isolates recovered were typed, and their resistance phenotype and genotype, as well as their virulence profiles, were analyzed. RESULTS: CoPS isolates were recovered from 56/281 patients (19.9%). Fifty-five were S. aureus (19.6%), 54 were methicillin susceptible (MSSA) and one was methicillin resistant (MRSA). The remaining isolate was S. pseudintermedius (0.4%). A high diversity of spa-types (n = 40) was detected, with 6 of them being new ones. The multi-locus-sequence-typing of 13 MSSA and one MRSA selected isolates was performed and the STs detected were: ST8, ST15, ST30, ST34, ST121, ST146, ST398, ST554, ST942, ST2499, and ST2500 (the last two STs being new). One MSSA isolate was typed as t1197-ST398-(Clonal complex)CC398. The MRSA isolate was typed as t002-ST146-CC5-SCCmec-IVc, and exhibited a multiresistance phenotype. The detected resistances were: penicillin (76%), macrolides (7%), tetracycline (7%), trimethoprim-sulfamethoxazole (7%), quinolones (7%), and lincosamides (5%). Five isolates contained lukF/lukS-PV genes, 17 tst gene, one eta gene, and two etb gene. The S. pseudintermedius isolate presented a new spa-type (t57) (belonging to a new ST180) and the geneslukS/F-I, siet, se-int, and expB. CONCLUSIONS: A high genetic diversity of S. aureus was detected. Mention must be made of the identification of MSSA CC398 and S. pseudintermedius isolates in two patients, one of them with animal contact. The detection of the genes lukF/lukS-PV and tst should be noted


INTRODUCCIÓN: Staphylococcus aureus y Staphylococcus pseudintermedius son 2 especies de gran importancia que pueden producir enfermedades tanto en personas como en animales. El objetivo del trabajo fue estudiar el estado de portador nasal de aislados de Staphylococcus coagulasa positiva (SCoP) en pacientes de un centro de atención primaria. MÉTODOS: Se analizaron muestras nasales de 281 pacientes sin patología infecciosa. Se tiparon los aislados SCoP y se estudiaron sus fenotipos y genotipos de resistencia y sus perfiles de virulencia. RESULTADOS: Se aislaron SCoP en 56/281 pacientes (19,9%): 55 de los aislados fueron S. aureus (19,6%), 54 sensibles a la meticilina (SASM) y uno resistente a la meticilina (SARM). El aislado restante correspondió a S. pseudintermedius (0,4%). Se detectó una alta diversidad de tipos de spa (n = 40), identificándose 6 nuevos tipos. Se realizó el multi-locus-sequence-typing de 13 cepas SASM y una cepa SARM seleccionadas y se detectaron los siguientes STs: ST8, ST15, ST30, ST34, ST121, ST146, ST398, ST554, ST942, ST2499 y ST2500 (los 2 últimos nuevos). Una de las cepas SASM se tipó como t1197-ST398-(Clonal Complex)CC398. La cepa SARM se tipó como t002-ST146-CC5-SCCmec-IVc y mostró un fenotipo de multirresistencia. Se detectó resistencia a: penicilina (76%), macrólidos (7%), tetraciclina (7%), trimetoprim-sulfametoxazol (7%), quinolonas (7%) y lincosamidas (5%). Se identificaron los genes (número de cepas): lukF/lukS-PV (5), tst (17), eta (1) y etb (2). La cepa de S. pseudintermedius presentó un spa nuevo (t057), una secuencia tipo nueva (ST180), y contenía los genes lukS/F-I, siet, se-int y expB. CONCLUSIONES: Se detectó una alta diversidad genética entre los aislados de SASM. Destaca la identificación de una cepa SASM CC398 (en un veterinario) y otra de S. pseudintermedius, y la frecuente detección de los genes lukF/lukS-PV, tst, eta o etb entre las cepas SASM


Assuntos
Feminino , Humanos , Masculino , Staphylococcus aureus/isolamento & purificação , Staphylococcus aureus/genética , Staphylococcus aureus/patogenicidade , Staphylococcus aureus Resistente à Meticilina/isolamento & purificação , Staphylococcus aureus Resistente à Meticilina/genética , Staphylococcus aureus Resistente à Meticilina/patogenicidade , Staphylococcus intermedius/isolamento & purificação , Staphylococcus intermedius/patogenicidade , Staphylococcus intermedius/genética , Monitoramento Epidemiológico/tendências , Atenção Primária à Saúde , Centros de Saúde , Mucosa Nasal/microbiologia , Portador Sadio , Tipagem Molecular , Resistência Microbiana a Medicamentos , Espanha/epidemiologia
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