Payervand, S. , , Peighambari, S. M. , and Shojadost, B. . "Virulence determination of Iranian Escherichia coli isolates from poultry in day-old chicks using a lethality test", Journal of Veterinary Research, 68, 3, 2013, 217-223. doi: 10.22059/jvr.2013.35445