Table 4.
Correlation between serum resistance and gene presence in R. anatipestifer isolates

Genes	SR1(n=34)			SS1 (n=96)
	+2	-2	Frequency (%)3	+2	-2	Frequency (%)3
AS87_09335	34	0	100.04	7	89	7.3
AS87_00480	31	3	91.24	25	71	26.0
AS87_05195	17	17	50.04	7	89	7.3
AS87_04050	31	3	91.24	17	79	17.7
AS87_01015	32	2	94.1	91	5	94.8
OmpA	34	0	100.0	92	4	95.8

SR, serum resistant isolates; SS, serum susceptible isolates.
+, no. of isolates with gene; -, no. of isolates without gene.
Frequency of gene (%).
Significant correlation between serum resistance and gene presence (Chi-square test, P<0.05) or Significantly higher frequency in SR than SS (Chi-square test, P<0.05).