Highly Pathogenic Avian Influenza Virus (H5N1) in Frozen Duck Carcasses, Germany, 2007

Harder, Timm C. GND; Teuffert, J.; Starick, Elke GND; Gethmann, Jörn GND; Grund, Christian GND; Fereidouni, Sasan R. GND; Durban, Markus GND; Bogner, K.H.; Neubauer-Juric, A.; Repper, R.; Hlinak, A.; Engelhardt, A.; Nöckler, A.; Smietanka, K.; Minta, Z.; Kramer, Matthias GND; Globig, Anja GND; Mettenleiter, Thomas C. GND; Conraths, Franz Josef GND; Beer, Martin GND

We conducted phylogenetic and epidemiologic analyses to determine sources of outbreaks of highly pathogenic avian influenza virus (HPAIV), subtype H5N1, in poultry holdings in 2007 in Germany, and a suspected incursion of HPAIV into the food chain through contaminated deep-frozen duck carcasses. In summer 2007, HPAIV (H5N1) outbreaks in 3 poultry holdings in Germany were temporally, spatially, and phylogenetically linked to outbreaks in wild aquatic birds. Detection of HPAIV (H5N1) in frozen duck carcass samples of retained slaughter batches of 1 farm indicated that silent infection had occurred for some time before the incidental detection. Phylogenetic analysis established a direct epidemiologic link between HPAIV isolated from duck meat and strains isolated from 3 further outbreaks in December 2007 in backyard chickens that had access to uncooked offal from commercial deep-frozen duck carcasses. Measures that will prevent such undetected introduction of HPAIV (H5N1) into the food chain are urgently required



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Harder, Timm C. / Teuffert, J. / Starick, Elke / et al: Highly Pathogenic Avian Influenza Virus (H5N1) in Frozen Duck Carcasses, Germany, 2007. 2009.


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