Frederick Angulo, an epidemiologist with the CDC, monitors the drug resistance of food-borne pathogens in the U.S. food supply. "The people who are most likely to get infected with food-borne diseases include the most vulnerable people in the population-infants and young children and also the elderly," he said. He says that Campylobacter infections are entirely preventable, as is the bacteria's antibiotic resistance. "In many ways what's occurring with Campylobacter is an indicator for a broader issue, which is...antibiotic-resistant bacteria in the food supply," he said.

　　47. Why do food-borne pathogens in Australia show low drug resistance?

　　48. In many industrialized countries, the most common food-borne disease is ________.

　　49. The food-borne disease may cause fever, vomiting, diarrhea and even ________.

　　50. The FDA banned the use of antibiotic from food-producing animals because public health

　　experts were concerned about ________.

　　51. What does Angulo say about the bacteria's antibiotic resistance?