Table 3. The indicators of genetic diversity and neutrality tests in the populations of O. viverrini from three villages using nad1 sequences.

Populations	No. of samples	Haplotype	S	Genetic diversity		Neutrality tests
				Hd	Pi	Tajima' s D (p value)	Fu's Fs (p value)
Na-Yao	15	9	40	0.800	0.018 +/- 0.010	-0.266*	1.449*
Thoong-Heang	13	5	22	0.692	0.013+/-0.007	0.950*	4.579*
Na-Ngam	14	6	16	0.736	0.010 +/- 0.005	0.763*	2.085*
Referent isolates	25	13	13	0.917	0.012 +/-0.006	-0.456*	-0.538 *
Total populations	67	31	80	0.951	0.021 +/-0.010	-1.071*	-2.673*

S = no. of segregation sites (polymorphic), Hd = haplotype diversity, Pi = nucleotide diversity. Statistical significance: p < 0.05.

* p>0.05, not significantly different.