submitted by Julie Thorndyke, D.V.M.. Medical Director, VCA Neshaminy Animal Hospital
Ticks and the bacteria they carry are not new to civilization. Spirochete-like cells resembling those causing Lyme disease were discovered in a 15 million-year-old fossilized tick, long before humans were roaming the earth.
Ticks are common ectoparasites of mammals and birds. They are thought of as insects, but are actually arachnids, similar to scorpions and spiders, and are not susceptible to many insecticides. There are many different types of ticks that carry many diseases affecting both pets and humans.