Volume 8, Number 8—August 2002
Research
Outbreak of Serogroup W135 Meningococcal Disease after the Hajj Pilgrimage, Europe, 2000
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 |
Ratio |
No. of cases |
Ratio |
||||
Before | After | After/ before | Before | After | After/ before | ||
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.
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.