TY - JOUR
T1 - Timing of influenza A(H5N1) in poultry and humans and seasonal influenza activity worldwide, 2004-2013
AU - Durand, Lizette O
AU - Glew, Patrick
AU - Gross, Diane
AU - Kasper, Matthew
AU - Trock, Susan
AU - Kim, Inkyu K
AU - Bresee, Joseph S
AU - Donis, Ruben
AU - Uyeki, Timothy M
AU - Widdowson, Marc-Alain
AU - Azziz-Baumgartner, Eduardo
PY - 2015
Y1 - 2015
N2 - Co-circulation of influenza A(H5N1) and seasonal influenza viruses among humans and animals could lead to co-infections, reassortment, and emergence of novel viruses with pandemic potential. We assessed the timing of subtype H5N1 outbreaks among poultry, human H5N1 cases, and human seasonal influenza in 8 countries that reported 97% of all human H5N1 cases and 90% of all poultry H5N1 outbreaks. In these countries, most outbreaks among poultry (7,001/11,331, 62%) and half of human cases (313/625, 50%) occurred during January-March. Human H5N1 cases occurred in 167 (45%) of 372 months during which outbreaks among poultry occurred, compared with 59 (10%) of 574 months that had no outbreaks among poultry. Human H5N1 cases also occurred in 59 (22%) of 267 months during seasonal influenza periods. To reduce risk for co-infection, surveillance and control of H5N1 should be enhanced during January-March, when H5N1 outbreaks typically occur and overlap with seasonal influenza virus circulation.
AB - Co-circulation of influenza A(H5N1) and seasonal influenza viruses among humans and animals could lead to co-infections, reassortment, and emergence of novel viruses with pandemic potential. We assessed the timing of subtype H5N1 outbreaks among poultry, human H5N1 cases, and human seasonal influenza in 8 countries that reported 97% of all human H5N1 cases and 90% of all poultry H5N1 outbreaks. In these countries, most outbreaks among poultry (7,001/11,331, 62%) and half of human cases (313/625, 50%) occurred during January-March. Human H5N1 cases occurred in 167 (45%) of 372 months during which outbreaks among poultry occurred, compared with 59 (10%) of 574 months that had no outbreaks among poultry. Human H5N1 cases also occurred in 59 (22%) of 267 months during seasonal influenza periods. To reduce risk for co-infection, surveillance and control of H5N1 should be enhanced during January-March, when H5N1 outbreaks typically occur and overlap with seasonal influenza virus circulation.
KW - Animals
KW - Disease Outbreaks
KW - Geography, Medical
KW - Global Health
KW - History, 21st Century
KW - Humans
KW - Influenza A Virus, H5N1 Subtype
KW - Influenza in Birds/epidemiology
KW - Influenza, Human/epidemiology
KW - Poultry
KW - Seasons
KW - Time Factors
U2 - 10.3201/eid2102.140877
DO - 10.3201/eid2102.140877
M3 - A1: Web of Science-article
C2 - 25625302
SN - 1080-6040
VL - 21
SP - 202
EP - 208
JO - Emerging Infectious Diseases
JF - Emerging Infectious Diseases
IS - 2
ER -