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Table 3 Number of vectors and their proximity to road and water bodies

From: Spatial distribution of Plasmodium knowlesi cases and their vectors in Johor, Malaysia: in light of human malaria elimination

Variables Distance (km)
Road < 1 1.0–2.0 2.1–3.0 3.1–4.0 4.1–5.0 5.1–6.0 ≥ 6.1
 Primary1 0 0 0 0 18 7 9
 Secondary2 121 44 1 55 143 0 12
Water
 Perennial3 1 27 198 3 0 171 10
  1. 1Primary road is a well-maintained road in a recognized system of highways
  2. 2Secondary road is an alternative way from the primary road, usually a two-way road for moderate or slow speed drive
  3. 3Perennial water body is a permanent water body such as the sea that keeps full or flowing throughout the seasons