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Volume 19, Number 4—April 2013

Dispatch

Early Introduction and Delayed Dissemination of Pandemic Influenza, Gabon

Sonia Etenna Lekana-Douki, Augustin Mouinga-Ondémé, Dieudonné Nkoghe, Christian Drosten, Jan Felix Drexler, Mirdad Kazanji, and Eric M. LeroyComments to Author 
Author affiliations: Centre International de Recherches Médicales de Franceville, Franceville, Gabon (S.E. Lekana-Douki, A. Mouinga-Ondémé, D. Nkoghe, E.M. Leroy); Ministère de la Santé Publique, Libreville, Gabon (D. Nkoghe); Bonn Medical Centre Institute of Virology, Bonn, Germany (C. Drosten, J.F. Drexler); Institut Pasteur de Bangui, Bangui, Central African Republic (M. Kazanji); Institut de Recherche pour le Développement, Montpellier, France (E.M. Leroy)

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Table

Demographic characteristics of patients and distribution of influenza viruses and other influenza-like illnesses, Gabon, July 2009–June 2011*

Patient and illness data Influenza virus types
Other† Total no. patients
pH1N1 A B pH1N1 + A + B
Sex, no. patients
M 33 4 23 60 427 487
F
39
4
28
71
408
479
Median age, y (range)
2 (2 mo–49 y)
45 (9–50 y)
2 (3 mo–41 y)
2 (2 mo–50 y)
1.58 (10 d–82 y)
1.66 (10 d–82 y)
Age group, no. patients
0–23 mo 30 0 20 50 444 494
2–4 y 25 0 17 42 219 261
>4 y
17
5
10
32
147
179
Illness, by year and town
2009
Libreville 3 (33) 6 (67) 0 9 12 21
Franceville 1 (50) 1 (50) 0 2 0 2
Koulamoutou 0 0 0 0 0 0
Oyem 0 1 (100) 0 1 1 2
Total 4 (33) 8 (67) 0 12 13 25
2010
Libreville 16 (70) 0 7 (30) 23 224 247
Franceville 1 (3) 0 34 (97) 35 135 170
Koulamoutou 15 (94) 0 1 (6) 16 42 58
Oyem 11 (85) 0 2 (15) 13 105 118
Total 43 (49) 0 44 (51) 87 506 593
2011
Libreville 11 (92) 0 1 (8) 12 165 177
Franceville 6 (60) 0 4 (40) 10 43 53
Koulamoutou 2 (50) 0 2 (50) 4 32 36
Oyem 6 (100) 0 0 6 76 82
Total 25 (78) 0 7 (22) 32 316 348
Total
Libreville 30 (68) 6 (14) 8 (18) 44 401 445
Franceville 8 (17) 1 (2) 38 (81) 47 178 225
Koulamoutou 17 (85) 0 3 (15) 20 74 94
Oyem 17 (85) 1 (5) 2 (10) 20 182 202
Total 72 (55) 8 (6) 51 (39) 131 835 966

*Values are no. (%) cases except as indicated. pH1N1, pandemic (H1N1) 2009; A, seasonal influenza A; B, seasonal influenza B.
†Influenza-like illnesses other than pH1N1 or seasonal influenza A or B. Age data were missing for 32 patients in this category.

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