Analysis of the dihydrofolate reductase-thymidylate synthase gene sequences in Plasmodium vivax field isolates that failed chloroquine treatment

Table 1 Failed cases of anti-malaria drug treatment

	1996	1997	1998	1999	2000	2001	Total
Number of patients	71	568	2275	2537	2853	1614	9918
Failed treatment cases	2	12	45	65	121	59	304
Rate (%)	2.81	2.11	1.98	2.56	4.24	3.67	3.07

ISSN: 1475-2875