Research Article
Fifteen Years of Annual Mass Treatment of Onchocerciasis with Ivermectin Have Not Interrupted Transmission in the West Region of Cameroon
Table 5
Comparing baseline entomological data of 1996 at two fly collection sites and three during 2011.
| Month/year of black fly collection | Baseline May 1996 | Followup, 2011 | Black fly collection sites | Bafang (Basseu) | Foumbot (Maka) | Bafang | Foumbot | Massangam |
| Number of Simulium caught | 5 | 166 | 5261 | 2856 | 12538 | Number of Simulium dissected | 5 | 142 | 5261 | 2856 | 12138 | Number of parous flies | 1 | 97 | 1502 | 1028 | 2845 | Parous rate (%) | 20 | 68.3 | 28.5 | 36 | 23.4 | Number of Simulium flies infected (L1, L2, L3] | 1 | 12 | 3 | 9 | 19 | Infection rate (%) | 20.00 | 8.45 | 0.20 | 0.88 | 0.67 | Number of Simulium flies infective L3 larval stage in the head | 20 | 2 | 0 | 2 | 5 | Infective rate (%) | 20.0 | 2.11 | 0.00 | 0.19 | 0.18 | Monthly biting rate per person | 75.0 | 1660.00 | na | na | na | Monthly transmission potential* | 15.0 | 210.40 | na | na | na | Annual biting rate per person | Na | na | 52,610 | 28,560 | 125,380 | Annual transmission potential | Na | na | 0 | 70 | 310 |
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