Chilean ranch dogs (IMAGE) University of California - Davis Caption Dogs at a sheep ranch lounge beside a vehicle in Tierra del Fuego in southern Chile. Canine echinococcosis, a parasitic disease, has increased in the province after a deworming program was cancelled. Credit Eric Eisenman, UC Davis Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.