Presence of Virulence Genes in Enterococcus Species Isolated from Meat Turkeys in Germany Does Not Correlate with Chicken Embryo Lethality

Table 2

Virulence classification according to the embryo mortality rate (EMR) [22] and embryo survival index (ESI) [37].

EMR (%)	ESI	Virulence
>80	0–50	Highly virulent
41–80	51–100	Moderately virulent
≤40	101–140	Less virulent