Data/hora: 11/06/2024 01:34:30

Provedor de dados: | 55
País: | Brazil
Título: | Staphylococcus aureus in tonsils of patients with recurrent tonsillitis: prevalence, susceptibility profile, and genotypic characterization
Autores: | Cavalcanti,Veraluce Paolini; Camargo,Leandro Azevedo de; Moura,Fabiano Santana; Melo Fernandes,Edson Júnior de; Lamaro-Cardoso,Juliana; Braga,Carla Afonso da Silva Bitencourt; André,Maria Cláudia Porfirio.
Data: | 2019-01-01
Ano: | 2019
Palavras-chave: | Tonsillitis; Tonsillectomy; Staphylococcus aureus; Pulsed field gel electrophoresis.
Resumo: | ABSTRACT  Introduction: Bacterial tonsillitis is an upper respiratory tract infection that occurs primarily in children and adolescents. Staphylococcus aureus is one of the most frequent pathogens in the etiology of tonsillitis and its relevance is due to its antimicrobial resistance and persistence in the internal tissues of the tonsils. Tonsillectomy is indicated in cases of recurrent tonsillitis after several failures of antibiotic therapy.  Material and methods: In this study we evaluated 123 surgically removed tonsils from patients who had history of recurrent tonsillitis. The tonsils were submitted to microbiological analysis for detection of S. aureus. The isolates were identified by PCR for femA gene. Antimicrobial susceptibility of the isolates was determined by disk diffusion tests. All isolates were submitted to PCR to detect mecA and Panton-Valentine leucocidin (PVL) genes. The genetic similarity among all isolates was determined by pulsed field gel electrophoresis.  Results: Sixty-one S. aureus isolates were obtained from 50 patients (40.7%) with mean age of 11.7 years. The isolates showed high level resistance to penicillin (83.6%), 9.8% had inducible MLSb phenotype, and 18.0% were considered multidrug resistant (MDR). mecA gene was detected in two isolates and the gene coding for PVL was identified in one isolate. The genetic similarity analysis showed high diversity among the isolates. More than one genetically different isolate was identified from the same patient, and identical isolates were obtained from different patients.  Conclusions: MDR isolates colonizing tonsils even without infection, demonstrate persistence of the bacterium and possibility of antimicrobial resistance dissemination and recurrence of infection. A specific clone in patients colonized by S. aureus was not demonstrated.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702019000100008
Editor: | Brazilian Society of Infectious Diseases
Relação: | 10.1016/j.bjid.2018.12.003
Formato: | text/html
Fonte: | Brazilian Journal of Infectious Diseases  v.23 n.1 2019
Fonte: | info:eu-repo/semantics/openAccess