A number of human pathogens can be found in animal feces, yet the feces from these animals pose a currently unquantified risk to human health.  It is possible that WASH interventions may fail due to persistent exposure to fecal pathogens of animal (zoonotic) origin. We are investigating how and why infants living in Northern coastal Ecuador are exposed to environmental and animal contaminants, in collaboration with researchers from the University of Washington, Emory University, the University of Michigan, and the University of San Francisco de Quito, as an NIAID funded extension to the Levy Group's ECoMid project.