Skip directly to search Skip directly to A to Z list Skip directly to site content
CDC Home

Volume 8, Number 8—August 2002


Outbreak of Serogroup W135 Meningococcal Disease after the Hajj Pilgrimage, Europe, 2000

Jean-François Aguilera*Comments to Author , Anne Perrocheau†, Christine Meffre‡, Susan Hahné§, and the W135 Working Group1
Author affiliations: *Communicable Disease Surveillance Centre, London, United Kingdom; †Institut de Veille Sanitaire, St. Maurice, France; ‡Rijksinstituut voor Volksgezondheid en Milieu (RIVM), European Programme for Intervention Epidemiology Training, Bilthoven, the Netherlands; §Communicable Disease Surveillance Centre, Cardiff, Wales, United Kingdom

Main Article

Table 3

Number (and ratio) of cases in United Kingdom (UK) and France before and after a French Ministry of Health recommendationa

UK (n=42)
France (n=24)
Measure of impact (Ratio France / ratio UK)
No. of cases
No. of cases
Before After After/
before Before After After/
Pilgrim cases (a) 8 0 3 1
Household contacts (b) 9 5 4 4
(a)+(b) 17 5 0.3 7 5 0.7 2.4 [0.5; 11.1]; p=0.27
Outside-of-household contacts (c) 2 4 2 5
No identified contact (d) 0 14 0 5
(c)+(d) 2 18 9 2 10 5 0.6 [0.1; 4.6]; p=0.62
All cases 19 23 1.2 9 15 1.7 1.4 [0.5; 3.8];p=0.61

aApril 8, 2000. Ratio is divided by the same ratio in the United Kingdom and its 95% confidence interval.

Main Article

1F. Carion and O. Ronveaux, Institut de Santé Publique, Brussels, Belgium; P. Nuorti, H. Kayhty, and N. Nguyen Tran Minh, Kansanterveyslaitos Folkhälsoinstitutet, National Public Health Institute, Helsinki, Finland; T. Breuer, U. Menzel, and V. Bremer, Robert Koch Institute, Berlin, Germany; J. Kool, Rijksinstituut voor Volksgezondheid en Milieu, Bilthoven, the Netherlands; L. Spanjaard, Netherlands Reference Laboratory for Bacterial Meningitis, Amsterdam, the Netherlands; M. Arneborn and H. Götz, Smittskyddinstitutet, Stockholm, Sweden; P.Olcen, National Meningitidis Reference Laboratory, Örebro, Sweden; M. Ramsay, N. Noah, and E. Kaczmarski, Public Health Laboratory Service (PHLS), London, United Kingdom; J. Stuart, PHLS, Gloucester, United Kingdom; D. Levy-Bruhl, M.D. Matsika-Claquin, and J.C. Desenclos, Institut National de Veille Sanitaire, St-Maurice, France; M.K. Taha, Institut Pasteur, Paris, France; B. Iversen and D. Caugant, Folkehelsa, Oslo, Norway.

Top of Page The U.S. Government's Official Web PortalDepartment of Health and Human Services
Centers for Disease Control and Prevention   1600 Clifton Rd. Atlanta, GA 30333, USA
800-CDC-INFO (800-232-4636) TTY: (888) 232-6348 - Contact CDC–INFO