External parasites, such as fleas and ticks, live on the body of the host and produce an infestation.

DAVID JONES, WESH TWO NEWS. ALL RIGHT, DAVID, THANK YOU. A SANFORD MAN IS IN JAIL ACCUSED OF ANIMAL CRUELTY. POLICE SAY HE LET HIS DOG GET SO INFESTED WITH FLEAS, THE DOG STARTED TO LOSE ITS HAIR.

Health officials say plague can spread through flea bites or infected animals ...