Who Live on You by Roger M. Knutson was published in 1996. As the title implies, it discusses all the creatures that make the human body or their dwelling their homes. Most North Americans know that the deer tick can care Lyme disease. This disease alone is serious enough for everyone to make a practice of looking for ticks when they come in from being outside in their yards, local fields or woods. You'll have to read the book to learn more about the relationship between ticks and man.
Head lice are familiar to many parents of elementary aged children.
I'm sure you've seen the ads for shampoos to kill them. This gives you just a taste of the contents of this book. I suggest you wait until after eating to read the book. It just may destroy your appetite for the next meal. Also, as I learned the hard way, it doesn't make good bedtime reading either.