Figure 2From: Impact of long-term treatment of onchocerciasis with ivermectin in Kaduna State, Nigeria: first evidence of the potential for elimination in the operational area of the African Programme for Onchocerciasis ControlPrevalence of onchocerciasis infection in the Birnin Gwari focus, Kaduna, Nigeria, before and after 15-17 years of ivermectin treatment.Back to article page