article_snippet.sent: Fleas in Arizona have tested positive for Disease and could spread Disease to humans, according to officials.
article_snippet.sent: Prairie dog deaths at Picture Canyon in Arizona alerted officials to the possibility of an outbreak.
article_snippet.sent: Parasitic insects from the preserve near a water treatment plant in Flagstaff were found to carry the illness.
article_snippet.sent: Authorities near Flagstaff, Arizona, have found fleas infected with plague after prairie dogs in Picture Canyon began dying (file photos)
article_snippet.sent: Human cases have developed from close contact with cats who have preyed on infected vermin and  residents in the Southwest have been warned about dangers of Disease while camping.
article_snippet.sent: Prairie dogs are particularly susceptible to illness because Prairie dogs live in social burrows, and 90 per cent of the furry creatures' colony can eventually be wiped out if plague infects one member.
article_snippet.sent: Disease's rodent host dies, when fleas will look for more blood to drink, including from people.
article_snippet.sent: The discovery of the disease at Picture Canyon (pictured) has prompted a warning from authorities about the dangers posed by dead rodents .
article_snippet.sent: Insecticide has been sprayed in prairie dog burrows in Picture Canyon ( to halt Plague's spread.
highlights_snippet.sent: Prairie dog deaths at Picture Canyon led to positive tests on fleas .
  
highlights_snippet.sent: Residents warned about dangers to pets, especially cats .
  
highlights_snippet.sent: Disease can wipe out 90 per cent of prairie dogs in a colony .