@article{li_liu_li_xu_zheng_2017,  title={Salmonella Enteritidis in Layer Farms of Different Sizes Located in Northern China: On-Farm Sampling and Detection by the PCR Method},  volume={19},  ISSN={1516-635X},  url={https://doi.org/10.1590/1806-9061-2016-0318},  DOI={10.1590/1806-9061-2016-0318},  number={3},  journal={Brazilian Journal of Poultry Science},  publisher={Fundação de Apoio à Ciência e Tecnologia Animal},  author={Li, X and Liu, L and Li, Q and Xu, G and Zheng, J},  year={2017},  month={Jul},  pages={377–386} }