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Table 2 Distribution and HBI of species and forms of Anopheles gambiae complex in the study area.

From: Anopheles gambiae complex along The Gambia river, with particular reference to the molecular forms of An. gambiae s.s

Site code Village TOT(N) An. arabiensis An. melas An. gambiae M-form An. gambiae S-form
    (%) CIs 95% HBI (N) HBI (%) (%) CIs HBI (N) HBI (%) (%) CIs HBI (N) HBI (%) (%) CIs HBI (N) HBI (%)
  LRA-W                  
1 Kartong 110 4.55 1.9–10.21 n/a n/a 30.91 23–40.1 26 0.50 62.73 53.4–71.2 56 0.66 1.82 0.5–6.4 n/a n/a
2 Mandinaba 41 9.76 3.8–22.5 n/a n/a 85.37 71.6–93.1 35 0.69 2.44 0.4–12.6 n/a n/a 2.44 0.4–12.6 n/a n/a
2 Mandinaba 155 9.68 5.9–15.4 11 0.45 24.52 18.4–31.8 26 0.50 40.00 32.6–47.9 33 0.52 25.81 19.6–33.2 25 0.12
3 Jiboro Kuta 13 7.69 1.4–33.3 n/a n/a 0.00 0–22.8 n/a n/a 84.62 57.7–95.7 n/a n/a 7.69 1.4–33.3 n/a n/a
  LRA-S                  
4 Kemoto 11 9.09 1.6–37.7 n/a n/a 90.91 62.3–98.4 10 0.80 0.00 0–25.9 n/a n/a 0.00 0–25.9 n/a n/a
5 Tankular 68 20.59 12.7–31.6 14 0.79 60.29 48.4–71.1 40 0.58 17.65 10.4–28.4 12 0.75 1.47 0.3–7.9 n/a n/a
5 Tankular 212 2.36 1–5.4 n/a n/a 20.28 15.4–26.2 42 0.52 75.94 69.8–81.2 158 0.45 1.42 0.5–4.1 n/a n/a
6 Keneba 29 3.45 0.6–17.2 n/a n/a 13.79 5.5–30.6 n/a n/a 79.31 61.6–90.1 19 0.47 3.45 0.6–17.2 n/a n/a
6 Keneba 51 0.00 0–7 n/a n/a 25.49 15.5–38.9 13 0.46 72.55 59–82.9 37 0.49 1.96 0.3–10.3 n/a n/a
  LRA-N                  
7 Hamdalai 105 4.76 2–10.7 n/a n/a 3.81 1.5–9.4 n/a n/a 64.76 55.2–73.2 38 0.39 26.67 19.1–35.8 19 0.26
8a Sare Samba Sowe 104 1.92 0.5–6.7 n/a n/a 8.65 4.6–15.6 n/a n/a 19.23 12.8–27.8 20 0.25 70.19 60.8–78.1 73 0.23
8b Sare Samba Sowe 159 3.14 1.3–7.1 n/a n/a 1.26 0.3–4.5 n/a n/a 52.83 45.1–60.4 82 0.44 42.77 35.3–50.5 68 0.44
8 Sare Samba Sowe 2006 263 2.66 1.3–5.4 n/a n/a 4.18 2.3–7.3 n/a n/a 39.54 33.8–45.6 n/a n/a 53.61 47.6–59.5 n/a n/a
9 Sare Illo Buya 43 0.00 0–8.2 n/a n/a 41.86 28.4–56.7 n/a n/a 34.88 22.4–49.8 n/a n/a 23.26 13.2–37.7 n/a n/a
10 Dai Mandinka 50 2.00 0.3–10.5 n/a n/a 50.00 36.6–63.4 13 0.46 48.00 34.8–61.5 15 0.40 0.00 0–7.1 n/a n/a
11 Jajari 25 4.00 0.7–19.5 n/a n/a 16.00 6.4–34.6 n/a n/a 76.00 56.6–88.5 n/a n/a 4.00 0.7–19.5 n/a n/a
12 Yallal 184 2.72 1.2–6.2 n/a n/a 46.74 39.7–53.9 86 0.36 48.37 41.3–55.5 89 0.21 2.17 0.8–5.4 n/a n/a
13 Ker Madi 142 31.69 24.6–39.7 45 0.53 20.42 14.6–27.8 29 0.66 47.89 39.8–56 68 0.76 0.00 0–2.6 n/a n/a
13 Ker Madi 22 9.09 2.5–27.8 n/a n/a 68.18 47.3–83.6 n/a n/a 22.73 10.1–43.4 n/a n/a 0.00 0–149 n/a n/a
13 Ker Madi 121 8.26 4.5–14.5 10 0.80 69.42 60.76.9 84 0.63 21.49 15.1–29.6 26 0.77 0.83 0.1–4.5 n/a n/a
14 Kalataba 100 2.00 0.5–7 n/a n/a 74.00 64.6–81.6 74 0.04 19.00 12.5–27.8 19 0.11 5.00 2.1–11.2 n/a n/a
15 Ballingho 41 2.44 0.4–12.6 n/a n/a 17.07 8.5–31.3 n/a n/a 80.49 66–89.8 33 0.24 0.00 0–8.6 n/a n/a
15 Ballingho 12 0.00 0–24.2 n/a n/a 58.33 31.9–80.7 n/a n/a 41.67 19.3–68 n/a n/a 0.00 0–24.2 n/a n/a
  CRA                  
16 Teneng Fara 182 1.10 1.1–3 n/a n/a 0.55 0.1–3 n/a n/a 98.35 95.3–99.4 179 0.35 0.00 0–2.1 n/a n/a
17 Wellingara Kejaw 22 72.73 51.8–86.8 11 0.27 0.00 0–14.9 n/a n/a 27.27 13.1–48.5 n/a n/a 0.00 0–14.9 n/a n/a
17 Wellingara Kejaw 61 22.95 14.2–34.9 14 0.43 0.00 0–5.9 n/a n/a 77.05 65.1–85.8 47 0.19 0.00 0–5.9 n/a n/a
17 Wellingara Kejaw 25 28.00 14.3–47.6 n/a n/a 0.00 0–13.3 n/a n/a 72.00 52.4–85.7 n/a n/a 0.00 0–13.3 n/a n/a
18 Walikunda 11 9.09 1.6–37.7 n/a n/a 0.00 0–25.8 n/a n/a 90.91 62.3–98.4 10 0.10 0.00 0–25.8 n/a n/a
19 Saruja 48 60.42 46.3–73 23 0.65 0.00 0–0.7 n/a n/a 39.58 27–53.7 15 0.60 0.00 0–0.7 n/a n/a
20 Daru wallof 230 22.61 17.7–28.4 52 0.60 0.00 0–1.6 n/a n/a 76.52 70.6–81.5 176 0.57 0.87 0.2–3.1 n/a n/a
  URA                  
21 Kabakamma 16 93.75 71.7–98.9 15 0.00 0.00 n/c n/a n/a 6.25 1.1 n/a n/a 0.00 0–19.4 n/a n/a
22 Tinkinjo 35 85.71 70.6–93.7 30 0.07 0.00 n/c n/a n/a 14.29 6.3–2.9 n/a n/a 0.00 0–9.9 n/a n/a
22 Tinkinjo 27 55.56 37.3–72.4 15 0.13 0.00 n/c n/a n/a 40.74 24.5–59.3 11 0.09 3.70 0.6–18.3 n/a n/a
23 Touba Tafsir 130 76.15 68.1–82.6 99 0.06 0.00 n/c n/a n/a 20.77 14.7–28.5 27 0.04 3.08 1.2–7.6 n/a n/a
23 Touba Tafsir 108 69.44 60.2–77.3 75 0.63 0.00 n/c n/a n/a 27.78 20.2–36.9 30 0.60 2.78 0.9–7.8 n/a n/a
24 Limbanbulu Yamadou 297 40.40 35–46.1 120 0.30 0.00 n/c n/a n/a 57.24 51.6–62.7 170 0.49 2.36 1.1–4.8 n/a n/a
25 Kusunu 38 2.63 0.5–13.5 n/a n/a 0.00 n/c n/a n/a 92.11 79.2–97.3 17 0.18 5.26 1.4–17.3 n/a n/a
26 Kantel kunda 14 14.29 4–39.9 n/a n/a 0.00 n/c n/a n/a 28.57 11.7.54.6 n/a n/a 57.14 32.6–78.6 n/a n/a
  TAM                  
27 Jingoreh Mafy 175 92.57 87.7–95.6 161 0.11 0.00 n/c n/a n/a 0.57 0.1–3.2 n/a n/a 6.86 4–11.6 12 0.08
27 Jingoreh Mafy 131 48.85 40.4–57.3 26 0.35 0.00 n/c n/a n/a 14.50 9.5–21.5 11 0.64 36.64 28.9–45.2 28 0.54
28 Jingoreh Babagaleh 17 94.12 73–98.9 16 0.13 0.00 n/c n/a n/a 0.00 0–18.4 n/a n/a 5.88 1–27 n/a n/a
29 Amdalaye pont 148 46.62 38.8–54.6 44 0.39 0.00 n/c n/a n/a 4.05 1.9–8.6 n/a n/a 49.32 41.4–57.3 50 0.34
  WAS                  
30 Touba Badi 13 92.31 66.7–98.6 12 0.00 0.00 n/c n/a n/a 7.69 1.4–33.3 n/a n/a 0.00 0–22.8 n/a n/a
31 Wassadou 143 91.61 85.9–95.1 131 0.14 0.00 n/c n/a n/a 2.80 1.1–7 n/a n/a 5.59 2.9–10.6 n/a n/a
31 Wassadou 20 25.00 11.2–46.9 n/a n/a 0.00 n/c n/a n/a 0.00 0–16.1 n/a n/a 75.00 53.1–88.8 15 0.60
32 Laboya 82 18.29 11.4–28 n/a n/a 0.00 n/c n/a n/a 4.88 1.9–11.9 n/a n/a 76.83 66.6–84.6 15 0.60
  KED                  
33 Silling 80 30.00 21.1–40.7 11 1.00 0.00 n/c n/a n/a 0.00 0–4.6 n/a n/a 70.00 59.2–78.9 36 0.86
34 Samecouta 82 84.15 73.7–89.7 69 0.64 0.00 n/c n/a n/a 1.22 0.2–6.6 n/a n/a 14.63 8.6–23.9 12 0.58
34 Samecouta 177 20.90 15.6–27.5 30 0.63 0.00 n/c n/a n/a 3.95 1.9–7.9 n/a n/a 75.14 68.3–80.9 107 0.75
35 Laminia 28 78.57 60.5–89.8 22 0.50 0.00 n/c n/a n/a 3.57 0.6–17.7 n/a n/a 17.86 7.9–35. n/a n/a
  1. Frequency [95% Confidence Intervals, CI] and Human Blood Index (HBI) of An. arabiensis, An. melas, An. gambiae M-form and S-form in samples collected in the west to east transect from coastal The Gambia to eastern Senegal. Sampling sites are numbered accordingly to Table 1 and Figures. N = sample size. n/a = not available. n/c= not computable. LRA-W = Lower River Area-Western, LRA-S = Lower River Area-South Bank, LRA-N = Lower River Area-North Bank, CRA = Central River Area, URA = Upper River Area, TAM = Tambacounda, WAS = Wassadou, KED = Kedougou.