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Comparison between qualitative and semiquantitative catheter-tip cultures: laboratory diagnosis of catheter-related infection in newborns / Comparação entre culturas qualitativa e semiquantitativa de ponta de cateter: diagnóstico laboratorial de infecção relacionada a cateter em recém-nascidos
Marconi, Camila; Cunha, Maria de Lourdes R. S; Lyra, João C; Bentlin, Maria R; Batalha, Jackson E. N; Sugizaki, Maria Fátima; Rugolo, Lígia M. S. S.
  • Marconi, Camila; Universidade Estadual Paulista. Faculdade de Medicina de Botucatu. Departamento de Patologia. Botucatu. BR
  • Cunha, Maria de Lourdes R. S; Universidade Estadual Paulista. Instituto de Biociências de Botucatu. Departamento de Microbiologia e Imunologia. Botucatu. BR
  • Lyra, João C; Universidade Estadual Paulista. Faculdade de Medicina de Botucatu. Departamento de Pediatria. Botucatu. BR
  • Bentlin, Maria R; Universidade Estadual Paulista. Faculdade de Medicina de Botucatu. Departamento de Pediatria. Botucatu. BR
  • Batalha, Jackson E. N; Universidade Estadual Paulista. Faculdade de Medicina de Botucatu. Departamento de Patologia. Botucatu. BR
  • Sugizaki, Maria Fátima; Universidade Estadual Paulista. Instituto de Biociências de Botucatu. Departamento de Microbiologia e Imunologia. Botucatu. BR
  • Rugolo, Lígia M. S. S; Universidade Estadual Paulista. Faculdade de Medicina de Botucatu. Departamento de Pediatria. Botucatu. BR
Braz. j. microbiol ; 39(2): 262-267, Apr.-June 2008. ilus, graf, tab
Article Dans Anglais | LILACS | ID: lil-487702
ABSTRACT
This prospective study evaluated semiquantitative and qualitative catheter-culture methods for diagnosis of catheter-related infection (CRI) in newborns. Catheter tips from newborns admitted to the Neonatal Unit of the University Hospital of the Botucatu Medical School, UNESP were included in the study. Catheter cultures were performed with both semiquantitative and qualitative techniques. For CRI diagnosis, microorganisms isolated from catheter cultures and from peripheral blood cultures were identified and submitted to agent susceptibility test. The gold standard was the certain CRI diagnosis when same microorganism (specie and profile of susceptibility to agents) was isolated from both catheter tips and peripheral blood culture. A total of 85 catheters from 63 newborns were included in the study. The semiquantitative culture method, despite presenting lower sensitivity (90 percent), showed higher specificity (71 percent) when compared to 100 percent of sensitivity and 60 percent of specificity in the qualitative method. The identification of the microorganisms obtained from the catheter cultures showed a prevalence of coagulase-negative staphylococci(CNS) species. The specie Staphylococcus epidermidis (77.5 percent) was the prevalent in the catheters with positive semiquantitative cultures. Among 11 episodes with CRI diagnosis, 8 (72.7 percent) were associated with CNS species, of which 6 were S. epidermidis. Two episodes of CRI by S. aureus and one by Candida parapsilosis were also detected. The semiquantitative catheter-culture method showed advantages for CRI diagnosis in newborns when compared to the conservative qualitative method.
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Texte intégral: Disponible Indice: LILAS (Amériques) Sujet Principal: Staphylococcus epidermidis / Techniques in vitro / Coagulase / Techniques de laboratoire clinique / Techniques de culture Type d'étude: Etude diagnostique / Étude observationnelle / Étude pronostique / Recherche qualitative / Facteurs de risque Limites du sujet: Nouveau-né langue: Anglais Texte intégral: Braz. j. microbiol Thème du journal: Microbiologie Année: 2008 Type: Article Pays d'affiliation: Brésil Institution/Pays d'affiliation: Universidade Estadual Paulista/BR

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Texte intégral: Disponible Indice: LILAS (Amériques) Sujet Principal: Staphylococcus epidermidis / Techniques in vitro / Coagulase / Techniques de laboratoire clinique / Techniques de culture Type d'étude: Etude diagnostique / Étude observationnelle / Étude pronostique / Recherche qualitative / Facteurs de risque Limites du sujet: Nouveau-né langue: Anglais Texte intégral: Braz. j. microbiol Thème du journal: Microbiologie Année: 2008 Type: Article Pays d'affiliation: Brésil Institution/Pays d'affiliation: Universidade Estadual Paulista/BR