Table 1.
Human–water contact sites (HWCSs) surveyed, Bulinus spp. found, and mollusciciding coverage in Zanzibar, by year and island.
| 2012 | 2013 | 2014 | 2015 | 2016 | Total | |
|---|---|---|---|---|---|---|
| Pemba | ||||||
| Number of HWCSs surveyed | 140 | 139 | 143 | 143 | 139 | 167 |
| Number of HWCSs with Bulinus spp. (%) | 45 (32.1) | 46 (33.1) | 45 (31.5) | 42 (29.4) | 29 (20.9) | 71 (42.5) |
| Number of HWCSs with Bulinus spp. treated with niclosamide (%) | 38 (84.0) | 43 (93.5) | 42 (93.3) | 41 (97.6) | 26 (89.7) | 60 (84.5) |
| Number of Bulinus spp. collected | 2,599 | 788 | 795 | 1,012 | 384 | 5,578 |
| Number of Bulinus spp. shedding | 4 | 4 | 1 | 0 | 0 | 9 |
| Number of days team worked in the field | 63 | 113 | 153 | 136 | 87 | 552 |
| Unguja | ||||||
| Number of HWCSs surveyed | 39 | 40 | 91 | 105 | 111 | 121 |
| Number of HWCSs with Bulinus spp. (%) | 29 (74.3) | 22 (55.0) | 47 (51.7) | 35 (33.3) | 50 (45.0) | 91 (75.2) |
| Number of HWCSs with Bulinus spp. treated with niclosamide (%) | 9 (31.0) | 19 (86.4) | 33 (70.2) | 29 (82.9) | 36 (72.0) | 65 (71.4) |
| Number of Bulinus spp. collected | 1,716 | 565 | 676 | 221 | 785 | 3,963 |
| Number of Bulinus spp. shedding | 0 | 13 | 17 | 0 | 5 | 35 |
| Number of days team worked in the field | 29 | 20 | 60 | 96 | 141 | 346 |
Adapted from Knopp et al.41