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Table 2 Snail survey species data broken down by locality, site type and month

From: Freshwater snails of biomedical importance in the Niger River Valley: evidence of temporal and spatial patterns in abundance, distribution and infection with Schistosoma spp.

  n Bul.r Bul Bul+ BT.r BT BT+ BT.p BF.r BF BF+ BF.p
Locality   
 Bangou Koirey 55 8.2 453 10 7.4 406 10 2.46 0.6 31 0 0.00
 Diambala 250 30.1 7529 32 26.0 6506 32 0.49 3.7 914 0 0.00
 Doguel Kaina 134 5.3 704 6 2.2 296 6 2.03 3.0 397 0 0.00
 Dokimana 50 12.1 606 14 5.8 290 13 4.48 6.3 316 1 0.32
 Gantchi Bassarou 59 1.3 75 5 0.1 3 0 0.00 1.2 72 5 6.94
 Karma 87 6.2 542 2 1.5 128 2 1.56 4.7 409 0 0.00
 Kohan Garantche 35 7.3 254 0 5.1 179 0 0.00 2.1 75 0 0.00
 Koutoukale Zeno 130 20.8 2708 5 13.8 1789 5 0.28 6.7 867 0 0.00
 Lata Kabia 179 22.6 4046 10 15.6 2787 9 0.32 7.0 1259 1 0.08
 Libore 270 30.8 8320 150 24.8 6694 143 2.14 5.8 1565 7 0.45
 Namari Goungou 233 54.1 12,594 11 47.2 10,987 9 0.08 6.6 1530 1 0.07
 Namaro 99 10.2 1009 3 8.1 798 2 0.25 2.1 211 1 0.47
 Say 94 7.3 683 1 2.7 258 1 0.39 4.3 402 0 0.00
 Seberi 255 43.6 11,123 46 35.0 8929 43 0.48 8.6 2194 3 0.14
 Tagabati 52 3.0 155 0 2.7 142 0 0.00 0.3 13 0 0.00
 Tiaguirire 69 9.7 670 0 7.2 496 0 0.00 2.4 163 0 0.00
 Tokoye 112 13.1 1470 60 10.0 1117 57 5.10 3.2 354 3 0.85
 Yoreize Koira 102 4.3 437 0 0.6 66 0 0.00 3.6 371 0 0.00
 Youri 99 8.6 850 3 5.0 497 2 0.40 3.6 352 1 0.28
 Zama Koira Tegui 132 4.7 626 9 1.0 132 8 6.06 3.7 494 1 0.20
 Total 2496 22 54,854 367 17.0 42,500 342 0.80 4.8 11,989 24 0.20
Site type
 Canal 2 924 30.4 28,094 137 25.3 23,362 131 0.56 5.0 4590 5 0.11
 Canal 3 715 28.5 20,349 114 22.0 15,715 112 0.71 6.3 4518 2 0.04
 Pond 209 11.6 2422 81 6.4 1347 71 5.27 4.9 1024 10 0.98
 Rice 215 7.7 1659 14 2.7 571 7 1.23 5.0 1078 7 0.65
 River 208 5.3 1105 4 3.9 815 4 0.49 1.4 284 0 0.00
 Rivulet 141 5.0 705 16 4.4 624 16 2.56 0.5 64 0 0.00
 Spillway 84 6.2 520 1 0.8 66 1 1.52 5.1 431 0 0.00
 Total 2496 22 54,854 367 17.0 42,500 342 0.80 4.8 11,989 24 0.20
Month
 January 232 17.0 3951 17 14.7 3405 16 0.47 2.3 536 1 0.19
 February 224 27.5 6157 66 21.9 4895 64 1.31 5.6 1261 2 0.16
 March 216 47.4 10,242 109 38.6 8330 100 1.20 8.9 1913 9 0.47
 April 41 56.2 2305 20 45.9 1882 20 1.06 10.3 423 0 0.00
 May 185 30.6 5652 21 24.4 4522 20 0.44 6.1 1130 1 0.09
 June 173 32.3 5592 52 26.0 4502 51 1.13 5.2 895 1 0.11
 July 227 17.1 3887 22 14.2 3221 18 0.56 2.6 595 4 0.67
 August 197 12.0 2355 4 7.8 1543 3 0.19 4.0 797 1 0.13
 September 215 17.6 3782 8 9.4 2026 6 0.30 7.9 1704 2 0.12
 October 279 12.7 3551 18 8.7 2433 16 0.66 4.0 1118 1 0.09
 November 232 15.7 3648 11 12.1 2810 11 0.39 3.6 838 0 0.00
 December 275 13.6 3732 19 10.7 2931 17 0.58 2.8 779 2 0.26
 Total 2496 22 54,854 367 17.0 42,500 342 0.80 4.8 11,989 24 0.20
  1. Abbreviations: n, total count i.e. total number of site visits per category (e.g. 84 records in total from site visits to spillway sites); Bul.r, total count divided by n; Bul, Bulinus spp. raw count; Bul+, Bulinus spp. total shedding i.e. positive for Schistosoma spp. infection; BT.r, B. truncatus count divided by n; BT, B. truncatus raw count, BT+, B. truncatus total positive for Schistosoma spp. infection; BT.p, B. truncatus prevalence; BF.r, B. forskalii count divided by n; BF, B. forskalii raw count; BF+, B. forskalii total positive for Schistosoma spp. infection; BF.p, B. forskalii prevalence; BG, B. globosus; BS, B. senegalensis; BP.r, Bi. pfeifferi total count divided by n; BP, Bi. pfeifferi raw count; BP+, Bi. pfeifferi positive for Schistosoma spp. infection; BP.p, Bi. pfeifferi prevalence; RN, R. natalensis; RN.r, total count divided by n
  BG BS BP.r BP BP+ BP.p RN.r RN
Locality
 Bangou Koirey 16 0 0.0 0 0   1.3 70
 Diambala 109 0 0.8 210 3 1.43 0.0 7
 Doguel Kaina 11 0 0.0 0 0   0.6 78
 Dokimana 0 0 0.0 0 0   7.3 365
 Gantchi Bassarou 0 0 0.0 0 0   1.1 63
 Karma 5 0 0.0 0 0   0.6 51
 Kohan Garantche 0 0 0.0 0 0   0.1 3
 Koutoukale Zeno 0 52 0.0 0 0   0.0 0
 Lata Kabia 0 0 0.0 0 0   0.0 6
 Libore 61 0 0.0 0 0   0.1 32
 Namari Goungou 77 0 8.9 2080 76 3.65 6.1 1432
 Namaro 0 0 0.0 0 0   0.1 12
 Say 0 23 0.0 0 0   0.0 1
 Seberi 0 0 0.0 0 0   0.0 1
 Tagabati 0 0 0.0 0 0   0.3 15
 Tiaguirire 11 0 0.0 0 0   0.3 23
 Tokoye 0 0 0.0 0 0   2.0 225
 Yoreize Koira 0 0 0.0 0 0   1.2 124
 Youri 0 1 0.0 0 0   0.1 6
 Zama Koira Tegui 0 0 0.0 0 0   0.1 16
 Total 290 76 0.9 2290 79 3.45 1.0 2530
Site type
 Canal 2 142 0 2.0 1819 46 2.53 0.1 53
 Canal 3 116 0 0.7 471 33 7.01 2.2 1541
 Pond 0 52 0.0 0 0   2.9 610
 Rice 10 0 0.0 0 0   0.8 168
 River 5 1 0.0 0 0   0.3 69
 Rivulet 17 0 0.0 0 0   0.6 88
 Spillway 0 23 0.0 0 0   0.0 1
 Total 290 76 0.9 2290 79 3.45 1.0 2530
Month
 January 10 0 1.1 262 10 3.82 0.6 134
 February 0 1 2.9 656 13 1.98 2.5 554
 March 0 0 3.0 646 10 1.55 4.0 870
 April 0 0 2.0 80 5 6.25 9.0 368
 May 0 0 0.8 154 5 3.25 0.8 156
 June 195 0 0.6 102 9 8.82 0.8 137
 July 0 71 0.1 15 2 13.33 0.3 74
 August 11 4 0.1 16 0 0.00 0.1 23
 September 52 0 0.4 78 2 2.56 0.1 15
 October 0 0 0.1 25 2 8.00 0.1 20
 November 0 0 0.9 206 17 8.25 0.1 25
 December 22 0 0.2 50 4 8.00 0.6 154
 Total 290 76 0.9 2290 79 3.45 1.0 2530
  1. Abbreviations: n, total count i.e. total number of site visits per category (e.g. 84 records in total from site visits to spillway sites); Bul.r, total count divided by n; Bul, Bulinus spp. raw count; Bul+, Bulinus spp. total shedding i.e. positive for Schistosoma spp. infection; BT.r, B. truncatus count divided by n; BT, B. truncatus raw count, BT+, B. truncatus total positive for Schistosoma spp. infection; BT.p, B. truncatus prevalence; BF.r, B. forskalii count divided by n; BF, B. forskalii raw count; BF+, B. forskalii total positive for Schistosoma spp. infection; BF.p, B. forskalii prevalence; BG, B. globosus; BS, B. senegalensis; BP.r, Bi. pfeifferi total count divided by n; BP, Bi. pfeifferi raw count; BP+, Bi. pfeifferi positive for Schistosoma spp. infection; BP.p, Bi. pfeifferi prevalence; RN, R. natalensis; RN.r, total count divided by n