Figure 1From: Contribution of migrant coffee labourers infected with Onchocerca volvulusto the maintenance of the microfilarial reservoir in an ivermectin-treated area of MexicoMap of the Mexican-Guatemalan border area showing the geographical location of the three villages and four coffee fincas studied within the southern Chiapas focus endemic for human onchocerciasis, Mexico (indicated by A in the inset).Back to article page