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Table 1 Seasonal (temporal) clustering of P. falciparum infection at the household level at four West African study sites in Mali (n = 2), Senegal (n = 1) and The Gambia (n = 1)

From: Clustering of asymptomatic Plasmodium falciparum infection and the effectiveness of targeted malaria control measures

Study site(s)

Location of study site (based on GPS)

Mean rainy season prevalence of infection

Mean dry season prevalence of infection

Rainy vs. dry season (t-test)

# houses selected

Annual rainfall

Latitude

Longitude

% Pos

(SD)

% Pos

(SD)

p-value

# Houses

mm

Dangassa, Mali

12.11 N

− 8.33 W

44.5

(22.5)

37.6

(19.0)

0.0003

239

1023

Dioro, Mali

13.45 N

− 6.27 W

31.5

(19.7)

17.0

(16.1)

< 0.0001

305

591

Gambissara, The Gambia

13.32 N

− 14.22 W

4.4

(10.4)

9.1

(14.6)

0.002

141

1038

Madina Fall, Senegal

14.81 N

− 16.92 W

0.4

(1.9)

1.0

(4.6)

0.146

146

503

Totals

       

Ʃ 831

Ʃ = 2705

  1. GPS coordinates (latitude and longitude) are provided for each study site in columns 2 and 3, mean household prevalences of infection (percent of positive thick smears for each household) are in columns 4 and 6 and the standard deviations for those prevalences are in columns 5 and 7 (for the rainy and dry seasons, respectively). The numbers of households selected randomly from these sites which agreed to participate in this study are listed in column 9 for each study site and the annual rainfall totals for each site are listed in column 10. Testing to determine whether prevalences of infection were different in the dry vs. wet seasons was performed using the GraphPad QuickCalcs t-test calculator (https://www.graphpad.com/quackcalcs/ttest1/); the results of that testing are in column 8
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Malaria Journal

ISSN: 1475-2875

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