Funding for this research was provided by:
Medical Research Program of Zhejiang province (2016RCA008)
Major Science and Technology Program of Zhejiang province (2014C03039)
Text and Data Mining valid from 2018-06-19
Received: 14 November 2017
Accepted: 30 May 2018
First Online: 19 June 2018
Ethics approval and consent to participate
: Environmental samples collection was conducted as part of control and management for national notifiable diseases, and no human or animal research was conducted, thus ethical approval was not required.The field survey was approved by medical ethical committee of Zhejiang provincial CDC. All the backyard poultry owners provided consent to participate and were informed of their right to withdraw at any time. All questionnaires were anonymous and no personal information was collected.
: The authors declare that they have no competing interests.