[Source: US Centers for Disease Control and Prevention, Emerging Infectious Diseases Journal, full page: (LINK). Abstract, edited.]
Volume 18, Number 9—September 2012
Surveillance for Influenza Viruses in Poultry and Swine, West Africa, 2006–2008
Emmanuel Couacy-Hymann, Viviane A. Kouakou, Gilbert L. Aplogan, Felix Awoume, Casimir K. Kouakou, Lamidi Kakpo, Bridgett R. Sharp, Laura McClenaghan, Pamela McKenzie, Robert G. Webster, Richard J. Webby, and Mariette F. Ducatez1
Author affiliations: Central Laboratory for Animal Diseases, Bingerville, Côte d’Ivoire (E. Couacy-Hymann, V.A. Kouakou, C.K. Kouakou); Laboratoire de Diagnostic Vétérinaire et de Sérosurveillance, Parakou, Benin (G.L. Aplogan, L. Kakpo); Laboratoire Vétérinaire de Lomé, Lomé, Togo (F. Awoume); and St Jude Children’s Research Hospital, Memphis, Tennessee, USA (B.R. Sharp, L. McClenaghan, P. McKenzie, R.G. Webster, R.J. Webby, M.F. Ducatez)
To determine the extent of animal influenza virus circulation in Côte d’Ivoire, Benin, and Togo, we initiated systematic year-round active influenza surveillance in backyard birds (predominantly chickens, guinea fowl, and ducks) and pigs. A total of 26,746 swab specimens were screened by using reverse transcription PCR. Animal influenza prevalence was estimated at 0 (95% CIs for each of the 2 study years 0–0.04% to 0–1.48% [birds] and 0–0.28% to 0–5% [pigs]). In addition, 2,276 serum samples from the same populations were negative for influenza-specific antibodies. These data indicate that the environments and host populations previously identified as harboring high levels of influenza virus in Southeast Asia do not do so in these 3 countries. The combination of climate and animal density factors might be responsible for what appears to be the absence of influenza virus in the backyard sector of the 3 countries.