A 10-year-old Colorado child’s death has been linked to plague, and subsequent testing detected the presence of plague in insects in six counties in the state, officials said. The child died in LaPlata County “from causes associated with plague,” the Colorado Department of Public Health and Environment said in a recent statement. The child was a girl named Kinley Mitchell who died on July 5, The Durango Herald reported. She was a fourth-grader who raised hogs in 4-H, a network of youth organizations. Laboratory testing of samples of fleas later confirmed plague in the county, as well as five others. Plague is a disease that affects humans and other mammals, according to the Centers for Disease Control and Prevention. Its typical cause is a bacterium, Yersinia pestis. Humans usually get the plague after getting bitten by a rodent flea carrying the plague bacterium, or by handling an animal that is infected with …