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Table 4 Recurrence of infection in highland and lowland hamlets after clearing existing infections with Lap-Dap

From: Variation of malaria transmission and morbidity with altitude in Tanzania and with introduction of alphacypermethrin treated nets

Hamlet

Number of children becoming

positive for infection

Number of child

weeks at risk

Probability of becoming

positive per week

HIGHLAND

M7

24

144

0.167

M8

49

205

0.239

M9

51

325

0.157

M11

74

226

0.327

Highland totals

198

900

0.220

LOWLAND

Bl

61

138

0.442

B5

63

143

0.441

B7

37

88

0.420

B8

50

130

0.385

Lowland totals

211

143

0.423