1. 1. AAAP (American Association of Avian Pathologists). 2013. Diseases of Poultry, 13th ed., John Wiley & Sons, Chichester.
2. 2. Afanador-Villamizar, A., Gomez-Romero, C., Diaz, A. and Ruiz-Saenz, J. 2017. Avian influenza in Latin America: A systematic review of serological and molecular studies from 2000–2015. PLoS One 12: e0179573.
3. 3. AGROCALIDAD (Ecuadorian Agro quality assurance agency). 2015. II Ecuadorian poultry census, MAGAP (Ministry of Agriculture Livestock Aquaculture and Fisheries) http://sinagap.agricultura.gob.ec/index.php/resultados-censo-nacional/file/591-reporte-de-resultados-censo-nacional-completo (in Spanish) [accessed on December 21, 2017].
4. 4. AGROCALIDAD (Ecuadorian Agro quality assurance agency). 2016. Agreement No. 40−Contingency Plan for Avian Influenza. Official Registry of the Republic of Ecuador 743: 17–18 (in Spanish).
5. 5. CDC (Centers for Disease Control and Prevention). 2017. Influenza type A viruses. https://www.cdc.gov/flu/avianflu/influenza-a-virus-subtypes.htm [accessed on December 21, 2017].