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Table 1 In vitro drug sensitivity of P. falciparum isolated from along the Thai–Cambodia border collected before 2009 and from 2009 to 2016

From: Phenotypic and genotypic characterization of Thai isolates of Plasmodium falciparum after an artemisinin resistance containment project

Drug

Mean IC50

(n)

Min–Max IC50

Mean IC50

Before 2009

(n)

Mean IC50

2009–2016

(n)

p value

CQ

105.0 ± 53.0

(101)

13.9–334.6

90.2 ± 37.5

(50)

120.5 ± 61.4

(51)

0.004

QN

218.4 ± 131.5

(101)

34.5–737.9

181.4 ± 107.9

(50)

256.5 ± 142.0

(51)

0.004

MQ

28.2 ± 25.8

(101)

1.7–130.9

20.4 ± 23.1

(50)

35.5 ± 26.1

(51)

0.003

PPQ

22.0 ± 11.9

(90)

6.4–74.8

17.1 ± 6.9

(43)

26.1 ± 13.6

(47)

< 0.001

ARS

3.0 ± 1.8

(101)

0.5–9.7

2.6 ± 1.3

(50)

3.5 ± 2.1

(51)

0.008

DHA

2.5 ± 1.2

(95)

0.8–6.2

2.6 ± 1.2

(44)

2.3 ± 1.1

(51)

0.218

ATQ

1.5 ± 1.3

(50)

0.2–6.7

–

1.5 ± 1.3

(50)

–

PG

53.9 ± 20.3

(50)

21.5–115.2

–

53.9 ± 20.3

(50)

–

  1. Significant differences of drug IC50s between parasites collected before 2009 and from 2009 to 2016 determined using Independent t test