From Hospital Mae de Deus-Brazil: Evaluation of the Gram stain of sputa from cystic fibrosis patients to predict the presence of Staphylococcus aureus

http://www.ncbi.nlm.nih.gov/pubmed/23886792

Diagn Microbiol Infect Dis. 2013 Jul 22. pii: S0732-8893(13)00377-5. doi: 10.1016/j.diagmicrobio.2013.06.022. [Epub ahead of print]

Evaluation of the Gram stain of sputa from cystic fibrosis patients to predict the presence of Staphylococcus aureus.

Perez LR, Dias CA.

Source

Microbiology unit, Hospital Mãe de Deus, Porto Alegre - RS, 90880-480, Brazil. Electronic address: leandro.reus@gmail.com.

Abstract

We evaluated the presence of Gram-positive cocci in cluster, seen in Gram-stained smears of cystic fibrosis (CF) sputa versus the microbiological culture for the prediction of the presence of S. aureus. Gram stain provided low accuracy (69.2%; odds ratio, 4.8; 95% confidence interval, 61.3-76.1) for predicting S. aureus in CF sputum.