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Sites in Tamba Town from which flies used in this study were collected. Site 1 is located at 600 m east from the poultry farm A. Sites 2 and 3 are located at over 2 km east from this farm and intermediate between two poultry farms, A and B. Sites 4–6 are located within 700–900 m west from the poultry farm A (redrawn from [11]).
