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Table 1 Main characteristics of the area and intervention in Ifakara and Manhiça

From: Varying efficacy of intermittent preventive treatment for malaria in infants in two similar trials: public health implications

 

Ifakara

Manhiça

Years of intervention

1999–2001

2002–2004

Number of children randomized

701

1503

Incidence of malaria in placebo group a

0.36

0.43

EIR*

29

38

Transmission

Perennial

Perennial with marked seasonality

IPTi regimen**

2, 3, 9

3, 4, 9

Iron supplementation**

2–6

-

1st line Malaria Treatment during study

SP

SP + AQ

ITN use

68%

0

HIV seroprevalence (at ANC)

6.7%

19%

Hb AS prevalence ***

12%

0

SP parasitological sensitivity#

69% (62/90)

78.6% (55/70)

SP ACR#

94% (84/89)

83% (67/81)

  1. *EIR = Entomological inoculation rate
  2. **months of age
  3. *** hemoglobin AS genotype
  4. # at day 14. ACR = adequate clinical response
  5. a episode/child/year