N. E. Rosenstein, B. A. Perkins, D. S. Stephens, T. Popovic, and J. M. Hughes, Meningococcal disease, N Engl J Med, vol.344, issue.18, p.11333996, 2001.

D. A. Caugant and M. C. Maiden, Meningococcal carriage and disease--population biology and evolution. Vaccine, vol.27, 2009.
DOI : 10.1016/j.vaccine.2009.04.061
URL : https://doi.org/10.1016/j.vaccine.2009.04.061

O. B. Harrison, H. Claus, Y. Jiang, J. S. Bennett, H. B. Bratcher et al., Description and nomenclature of Neisseria meningitidis capsule locus. Emerg Infect Dis, vol.19, 2013.

L. H. Harrison, S. I. Pelton, A. Wilder-smith, J. Holst, M. A. Safadi et al., The Global Meningococcal Initiative: recommendations for reducing the global burden of meningococcal disease. Vaccine, vol.29, pp.3363-71, 2011.
URL : https://hal.archives-ouvertes.fr/pasteur-02083011

D. Bethell and A. J. Pollard, Meningococcal vaccines. Expert Rev Vaccines, vol.1, p.75, 2002.

P. Pubmed, , p.12908514

, Avis relatif à la vaccination par le vaccin méningococcique conjugué de sérogroupe C www.hcsp.fr/explore.cgi/hcspa20090424_meningC.pdf, HCSP, 2009.

L. H. Harrison, C. L. Trotter, and M. E. Ramsay, Global epidemiology of meningococcal disease. Vaccine, vol.27, p.19477562, 2009.

M. K. Taha, M. Achtman, J. M. Alonso, B. Greenwood, M. Ramsay et al., Serogroup W135 meningococcal disease in Hajj pilgrims, Lancet, vol.356, issue.9248, 2000.

J. M. Collard, Z. Maman, H. Yacouba, S. Djibo, P. Nicolas et al., Increase in Neisseria meningitidis serogroup W135, vol.16, pp.1496-1504, 2010.
URL : https://hal.archives-ouvertes.fr/pasteur-00561832

M. K. Taha, A. Kacou-n'douba, E. Hong, A. E. Deghmane, D. Giorgini et al.,

, Travel-related Neisseria meningitidis Serogroup W135 Infection, France. Emerg Infect Dis, vol.19, pp.1030-1032, 2013.

Y. Traore, B. M. Njanpop-lafourcade, K. L. Adjogble, M. Lourd, S. Yaro et al., The rise and fall of epidemic Neisseria meningitidis serogroup W135 meningitis in Burkina Faso, Clin Infect Dis, vol.43, issue.7, p.16941360, 2002.

M. A. Safadi, M. O'ryan, V. Bravo, M. T. Brandileone, M. C. Gorla et al., The current situation of meningococcal disease in Latin America and updated Global Meningococcal Initiative (GMI) recommendations. Vaccine, vol.33, pp.6529-6565, 2015.
URL : https://hal.archives-ouvertes.fr/pasteur-02013278

R. Abad, E. L. Lopez, R. Debbag, and J. A. Vazquez, Serogroup W meningococcal disease: global spread and current affect on the Southern Cone in Latin America, Epidemiol Infect, vol.15, 2014.

S. N. Ladhani, K. Beebeejaun, J. Lucidarme, H. Campbell, S. Gray et al., Increase in Endemic Neisseria meningitidis Capsular Group W Sequence Type 11 Complex Associated With Severe Invasive Disease in England and Wales, Clin Infect Dis, vol.60, issue.4, pp.578-85, 2015.

M. C. Maiden, J. A. Bygraves, E. Feil, G. Morelli, J. E. Russell et al., Multilocus sequence typing: a portable approach to the identification of clones within populations of pathogenic microorganisms, Proc Natl Acad Sci, vol.95, issue.6, p.9501229, 1998.

M. C. Maiden, M. J. Van-rensburg, J. E. Bray, S. G. Earle, S. A. Ford et al., MLST revisited: the gene-by-gene approach to bacterial genomics, Nat Rev Microbiol, vol.11, issue.10, pp.728-764, 2013.

J. Lucidarme, D. M. Hill, H. B. Bratcher, S. J. Gray, M. Du-plessis et al., Genomic resolution of an aggressive, widespread, diverse and expanding meningococcal serogroup B, C and W lineage, J Infect, vol.71, issue.5, 2015.
URL : https://hal.archives-ouvertes.fr/pasteur-02013265

M. K. Taha, D. Giorgini, M. Ducos-galand, J. M. Alonso, A. E. Deghmane et al., Continuing diversification of Neisseria meningitidis W135 as a primary cause of meningococcal disease after emergence of the serogroup in 2000, PubMed PMID: 15365005. 19. Parent du Chatelet I, vol.42, p.15634963, 2004.

F. J. Veyrier, E. Hong, A. E. Deghmane, and M. K. Taha, Draft Genome Sequence of a Neisseria meningitidis Serogroup C Isolate of Sequence Type 11 Linked to an Outbreak among Men Who Have Sex with Men, Genome Announc, vol.1, issue.5, 2013.
URL : https://hal.archives-ouvertes.fr/pasteur-02073309

K. A. Jolley and M. C. Maiden, BIGSdb: Scalable analysis of bacterial genome variation at the population level, BMC Bioinformatics, vol.11, 2010.

D. H. Huson and D. Bryant, Application of phylogenetic networks in evolutionary studies, Mol Biol Evol, vol.23, issue.2, p.16221896, 2006.

J. Lucidarme, K. J. Scott, R. Ure, A. Smith, D. Lindsay et al., Pubmed Central PMCID: 5144941. Epub 2016/12/06. eng. 25. Parent du Chatelet I, Barboza P, Taha MK. W135 invasive meningococcal infections imported from Sub-Saharan Africa to France, Euro Surveill, vol.21, issue.45, 2012.

K. S. Carville, K. Stevens, A. Sohail, L. J. Franklin, K. A. Bond et al., Increase in Meningococcal Serogroup W Disease, vol.22, issue.10, pp.1785-1792, 2013.

R. Abad and J. A. Vazquez, Early evidence of expanding W ST-11 CC meningococcal incidence in Spain, J Infect, vol.73, issue.3, 2016.

M. T. Valenzuela, G. Moreno, A. Vaquero, M. Seoane, J. C. Hormazabal et al., Emergence of W135 meningococcal serogroup in Chile during, Rev Med Chil, 2012.

, PubMed PMID: 24448851. Epub 2014/01/23. Emergencia de la cepa W135 causante de enfermedad meningococica invasora en Chile, vol.141, pp.959-67, 2012.

C. Bassi, M. K. Taha, M. C. Hong, E. Levy-bruhl, D. Barret et al., A cluster of invasive meningococcal disease (IMD) caused by Neisseria meningitidis serogroup W among university students, Euro Surveill, vol.22, issue.28, 2017.
URL : https://hal.archives-ouvertes.fr/pasteur-02013233

J. Gaschignard, C. Levy, A. E. Deghmane, F. Dubos, M. Muszlak et al., Invasive serogroup w meningococcal disease in children: a national survey from 2001 to 2008 in france, Pediatr Infect Dis J, vol.32, issue.7, pp.798-800, 2013.
URL : https://hal.archives-ouvertes.fr/pasteur-02095661

H. Christensen, M. May, L. Bowen, M. Hickman, and C. L. Trotter, Meningococcal carriage by age: a systematic review and meta-analysis, Lancet Infect Dis, vol.10, issue.12, p.21075057, 2010.
DOI : 10.1016/s1473-3099(10)70251-6

H. Peltola, J. M. Kataja, and P. H. Makela, Shift in the age-distribution of meningococcal disease as predictor of an epidemic? Lancet, vol.2, p.6125738, 1982.

H. Campbell, M. Edelstein, N. Andrews, R. Borrow, M. Ramsay et al., Emergency Meningococcal ACWY Vaccination Program for Teenagers to Control Group W Meningococcal Disease, Emerg Infect Dis, vol.23, pp.2015-2016, 2017.
DOI : 10.3201/eid2307.170236
URL : https://www.ucas.com/file/43181/download?token=lnUjPHdK

S. N. Ladhani, M. Ramsay, R. Borrow, A. Riordan, J. M. Watson et al., Genomic epidemiology of age-associated meningococcal lineages in national surveillance: an observational cohort study, Lancet Infect Dis, vol.101, issue.1, pp.1420-1428, 2015.