Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

Volume 16, Number 5—May 2010

Research

Contagious Period for Pandemic (H1N1) 2009

Gaston De SerresComments to Author , Isabelle Rouleau, Marie-Eve Hamelin, Caroline Quach, Danuta Skowronski, Louis Flamand, Nicole Boulianne, Yan Li, Julie Carbonneau, Anne-Marie Bourgault, Michel Couillard, Hugues Charest, and Guy Boivin
Author affiliations: Institut National de Santé Publique du Québec, Quebec City, Quebec, Canada (G. De Serres, I. Rouleau, N. Boulianne, A.-M. Bourgault, M. Couillard, H. Charest), Laval University, Quebec City (G. De Serres, M.-E. Hamelin, L. Flamand, J. Carbonneau, G. Boivin); McGill University–Montreal Children's Hospital, Montreal, Quebec, Canada (C. Quach); British Columbia Centers for Disease Control, Vancouver, British Columbia, Canada (D. Skowronski); Public Health Agency of Canada, Winnipeg, Manitoba, Canada (Y. Li)

Main Article

Table 1

Characteristics of various subgroups of participants in assessment of length of shedding of pandemic (H1N1) 2009 virus, Quebec City, Quebec, Canada, May 27–July 10, 2009*

Characteristic No. (%) core participants, n = 43 Symptomatic household or community contacts tested <7 days after symptom onset
Total no. (%), n = 73 No. (%) positive by pH1N1 and matrix PCRs, n = 32 No. (%) positive by matrix PCR only, 
n = 15 No. (%) negative by both PCRs, 
n = 26
Age group, y
<10 20 (47) 24 (33) 13 (41) 4 (27) 7 (27)
10–17 11 (26) 15 (21) 9 (28) 1 (7) 5 (19)
>18
12 (28)
34 (47)
10 (31)
10 (67)
14 (54)
Sex
F 24 (56) 41 (56) 17 (53) 8 (53) 16 (62)
M
19 (44)
32 (44)
15 (47)
7 (47)
10 (38)
Medical condition
Any influenza-associated 8 (19) 15 (21) 6 (19) 4 (27) 5 (19)
Pulmonary disease
4 (9)
10 (14)
3 (9)
4 (27)
3 (12)
Influenza vaccination
2008–2009 season
9 (21)
15 (21)
8 (25)
6 (40)
1 (4)
Clinical Illness†
Fever 37 (86) 37 (51) 25 (78) 8 (53) 4 (15)
Cough 42 (98) 58 (79) 31 (97) 13 (87) 14 (54)
Sore throat 26 (60) 41 (56) 19 (59) 5 (33) 17 (65)
Myalgia or arthralgia 17 (40) 23 (32) 12 (38) 4 (27) 7 (27)
Fatigue 40 (93) 51 (70) 31 (97) 10 (67) 10 (38)
Headache 31 (72 45 (62) 24 (75) 9 (60) 12 (46)
Gastrointestinal symptoms 14 (33) 18 (25) 8 (25) 5 (33) 5 (19)
Fever and cough 36 (84) 35 (48) 24 (75) 8 (53) 3 (12)
Influenza-like illness 36 (84) 34 (47) 24 (75) 8 (53) 2 (8)

*pH1N1 PCR, PCR for pandemic (H1N1) 2009 virus.
†Symptoms between onset of disease and first nasopharyngeal swab.

Main Article

TOP