TABLE 1.

dhfr microsatellite haplotypes by mutant alleles, Iquitos, Peru

Allele	Group	dhfr haplotype at the following microsatellite locusa:					No. of isolates
		−5.3	−3.87	−0.3	0.52	5.87
50/108/164	1	204	215	101	97	122	9
50/108/164	1	224	215	101	97	122	7
50/108/164	1	204	194	101	97	122	6
50/108/164	1	204	202	101	97	122	1
50/108/164	2	224	202	101	97	122	3
50/108/164	2	224	194	101	97	122	2
50/108/164	3	204	194	101	97	108	5
50/108/164	3	204		101	97	108	1
51/108	3	204	194		97	108	3
108/164	1	204	215		97		1
108	3	204	194		103	108	11
108	3	204	194	101	103	108	5
108	3	204	194	92	97	108	1
108	3	204	194	95	97	108	1
108	3	204	194	90	97	108	1
108	4	204	209	97	103	108	8
108	4	204	194	97	103	108	5
108	4	204	209	97	101	108	1
108	5	224	194		97	108	5
108	5	224	194	92	97	108	4
108	5	224	194	78	97	108	3
108	5	224	194	74	97	108	2
108	5	224	194	97	97	108	1
108	5	224	194	100	97	108	1
108	5	224	194	103	97	108	1

^aA total of 88 isolates were tested. The numbers for the microsatellite loci are the location with respect to dhfr (in kb), where negative positions are 5′ to dhfr and nonnegative positions are 3′ to dhfr. Empty cells represent loci that did not amplify.