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Title:	Detection of Streptococcus pneumoniae and Haemophilus influenzae type B by real-time PCR from dried blood spot samples among children with pneumonia: a useful approach for developing countries
Author:	Selva Jové, Laura; Benmessaoud, Rachid; Lanaspa, Miguel; Jroundi, Imane; Moraleda, Cinta; Acácio, Sozinho; Iñigo, Melania; Bastiani, Alien; Monsonis, Manuel; Pallarés Giner, Roman; Bassat Orellana, Quique; Muñoz-Almagro, Carmen
Other authors:	Universitat de Barcelona
Abstract:	Background: Dried blood spot (DBS) is a reliable blood collection method for storing samples at room temperature and easily transporting them. We have previously validated a Real-Time PCR for detection of Streptococcus pneumoniae in DBS. The objective of this study was to apply this methodology for the diagnosis of S. pneumoniae and Haemophilus influenzae b (Hib) in DBS samples of children with pneumonia admitted to two hospitals in Mozambique and Morocco. Methods: Ply and wzg genes of S. pneumoniae and bexA gene of Hib, were used as targets of Real-Time PCR. 329 DBS samples of children hospitalized with clinical diagnosis of pneumonia were tested. Results: Real-Time PCR in DBS allowed for a significant increase in microbiological diagnosis of S. pneumoniae and Hib. When performing blood bacterial culture, only ten isolates of S. pneumoniae and none of Hib were detected (3·0% positivity rate, IC95% 1·4-5·5%). Real-Time PCR from DBS samples increased the detection yield by 4x fold, as 30 S. pneumoniae and 11 Hib cases were detected (12·4% positivity rate, IC95% 9·0-16·5%; P<0·001). Conclusion: Real-Time PCR applied in DBS may be a valuable tool for improving diagnosis and surveillance of pneumonia caused by S. pneumoniae or Hib in developing countries.
Subject(s):	Bacteris patògens Reacció en cadena de la polimerasa Pneumònia Infants Pneumococs Pathogenic bacteria Polymerase chain reaction Pneumonia Children Streptococcus pneumonia
Rights:	cc-by (c) Selva Jové, Laura et al., 2013 http://creativecommons.org/licenses/by/3.0/es
Document type:	Article info:eu-repo/semantics/publishedVersion
Published by:	Public Library of Science (PLoS)
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