G. and G. De-pathologie-infectieuse-pédiatrique, Hôpital Mère-Enfant, 7 quai Moncousu, 44093 Nantes cedex 1, France. 3 Paediatric Emergency Department

, Paediatric Emergency Unit & Infectious Diseases

I. Cie5, 10 Paediatric Emergency Department, Clinical Epidemiology Unit

G. E. Lee, S. A. Lorch, S. Sheffler-collins, M. P. Kronman, and S. S. Shah, National hospitalization trends for pediatric pneumonia and associated complications, Pediatrics, vol.126, issue.2, pp.204-217, 2010.

I. Rudan, C. Boschi-pinto, Z. Biloglav, K. Mulholland, and H. Campbell, Epidemiology and etiology of childhood pneumonia, Bull World Health Organ, vol.86, issue.5, pp.408-424, 2008.

, Antibiotic therapy in general and current practice in lower respiratory tract infections in adults and children, Recommendations. Med Mal Infect, vol.35, issue.12, pp.619-653, 2005.

A. Giguere, F. Legare, J. Grimshaw, S. Turcotte, M. Fiander et al., Printed educational materials: effects on professional practice and healthcare outcomes, Cochrane Database Syst Rev, vol.10, p.4398, 2012.

A. Martinot, M. Halna-tamine, D. Guimber, and V. Hue, Limitation for the use of guidelines: an example of oral rehydratation solutions, Arch Pediatr, vol.11, issue.6, pp.712-715, 2004.

D. L. Paterson, Collateral damage" from cephalosporin or quinolone antibiotic therapy, Clin Infect Dis, vol.38, issue.suppl4, pp.341-346, 2004.

F. Angoulvant, D. Skurnik, H. Bellanger, H. Abdoul, X. Bellettre et al., Impact of implementing French antibiotic guidelines for acute respiratory-tract infections in a paediatric emergency department, Eur J Clin Microbiol Infect Dis, vol.31, issue.7, pp.1295-303, 2005.

, Groupe de Pathologie Infectieuse Pédiatrique. Recommandations de bonnes pratiques: Antibiothérapie par voie générale dans les infections respiratoires hautes de l'adulte et de l'enfant, 2011.

F. Angoulvant, C. Levy, E. Grimprel, E. Varon, M. Lorrot et al., Early impact of 13-valent pneumococcal conjugate vaccine on community-acquired pneumonia in children, Clin Infect Dis, vol.58, issue.7, pp.918-942, 2014.

I. C. Michelow, K. Olsen, J. Lozano, N. K. Rollins, L. B. Duffy et al., Epidemiology and clinical characteristics of community-acquired pneumonia in hospitalized children, Pediatrics, vol.113, issue.4, pp.701-708, 2004.

A. V. Diez-roux, The study of group-level factors in epidemiology: rethinking variables, study designs, ans analytical approaches, Epidemiol Rev, vol.26, pp.104-115, 2004.

M. J. Smith, M. Kong, A. Cambon, and C. R. Woods, Effectiveness of antimicrobial guidelines for community-acquired pneumonia in children, Pediatrics, vol.129, issue.5, pp.1326-1359, 2012.

M. Daana, G. Rahav, A. Hamdan, A. Thalji, F. Jaar et al., Measuring the effects of pneumococcal conjugate vaccine (PCV7) on Streptococcus pneumoniae carriage and antibiotic resistance: the Palestinian-Israeli Collaborative Research (PICR). Vaccine, 2015.

E. Varon, C. Janoir, and L. Gutmann, Centre national de référence des pneumocoques: Rapport d'activité 2010, épidémiologie, 2009.

E. Varon, C. Janoir, and L. Gutmann, Centre national de référence des pneumocoques: Rapport d'activité 2013, épidémiologie, 2012.

F. Angoulvant, M. Pereira, F. Perreaux, V. Soussan, L. L. Pham et al., Impact of unlabeled French antibiotic guidelines on antibiotic prescriptions for acute respiratory tract infections in seven pediatric emergency departments, Pediatr Infect Dis J, vol.33, issue.3, pp.330-333, 2009.

M. Harris, J. Clark, N. Coote, P. Fletcher, A. Harnden et al., British Thoracic Society Standards of Care Committee. British Thoracic Society guidelines for the management of community acquired pneumonia in children: update, Thorax, vol.66, issue.2, pp.1-23, 2011.

J. S. Bradley, C. L. Byington, S. S. Shah, B. Alverson, E. R. Carter et al., Pediatric Infectious Diseases Society and the Infectious Diseases Society of America. The management of community-acquired pneumonia (CAP) in infants and children older than 3 months of age: clinical practice guidelines by the Pediatric Infectious Diseases Society (PIDS) and the Infectious Diseases Society of America (IDSA), Clin Infect Dis, vol.53, issue.7, pp.25-76, 2011.

B. A. Haider, M. A. Saeed, and Z. A. Bhutta, Short-course versus long-course antibiotic therapy for non-severe community-acquired pneumonia in children aged 2 months to 59 months. Cochrane Database Syst Rev, 2008.