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Worlds Without End Blog

Guest Post: Mira Grant Talks Parasites Posted at 8:00 AM by Dave Post

Dave Post

Mira Grant, author of the wildly popular Newsflesh zombie trilogy, has a new plan for creeping you the fuck out. In this guest post she shares some fun facts about parasites that she discovered doing research for her newest creeptastic book called, you guessed it, Parasite. You can practically hear her cackling with glee while she’s trying to make our skin crawl but what else can you expect from the Zombie Queen? Enjoy!


Mira GrantParasites are neat.

They can modify of the behavior of supposedly more “complex” organisms, turning them into incubators and caretakers at the expense of their own lives (and the lives of their young). They can survive in dramatically different environments over the course of their often metamorphic lives, going from open water to the gut of a bird to the weeping sores on a human’s leg (hint: don’t go wading in any water you don’t know intimately). They infect everything. You, me, the world–this planet belongs to the parasites, and we’re only tolerated because they’ve got to get their take-out somewhere.

In case the preceding wasn’t enough of a hint for you, I’m Mira Grant, and I love parasites. They have shaped the evolution and development of life on this planet to a degree that we’re still trying to accurately map, and there are indications that they may be responsible for a lot of things that we enjoy. Like gendered reproduction. Studies on otherwise identical populations of snails living in isolated lakes have shown that snails who reproduce parthenogenically (basically via self-cloning, a trick that can also be accomplished by some lizards, some fish, and the Komodo dragon, in case you never wanted to sleep again) have a higher instance of fluke parasitism than snails who reproduce in a sexual manner. The blending of genes inherent in sexual reproduction creates children who stand a better chance of resisting cataclysmic parasitic infection. So if you like sex, thank the parasites.

tapewormBut parasites don’t just give us gender and hence sex and all the fun things you can do with it. They also give us real-world zombies, creatures whose wills have been totally hijacked by their parasitic masters. Parasites may be tiny (for the most part–some tapeworms can grow dauntingly, damagingly large) but they’re capable of some incredibly big things. Our immune systems have evolved in tandem with these parasitic visitors, a continual biological arms race with the end goal being nothing less than ownership of the human body. We think we’re winning. The parasites, if they could think, would probably think that it was just a matter of time.

As you can probably guess, I’m a lot of fun at the dinner table. Especially right now, when I’m full of fun facts about the wonderful world of parasites. Fun facts like “let’s talk about parasitic cysts in your sashimi” and “do you know why you shouldn’t eat undercooked pork?” (My friends have gotten very, very good at distracting me with ice cream.) Researching the book that would eventually become Parasite was some of the most fun I’ve had since I was initially consulting doctors on the best way to raise the dead. I read books. I read technical papers. I read more books in order to understand the technical papers. I attended lectures, visited museums, and watched several necropsies of local animals thought to be suffering from parasitic infection (spoiler alert: most of them were, which is why we don’t eat roadkill). I met the parasitic world in the best possible way: by looking at it, delighting in it, and learning to respect it. These little creatures possess the power to really ruin a person’s day. I like that in a biological organism.

Parasites are wonderful. I hope you can learn to love them like I do, or at least come to really understand why restaurants have all those “do not eat undercooked seafood” warnings.

Yay, parasites!


ParasiteMira Grant’s newest book is Parasite, out on October 29 from Orbit.

From New York Times bestselling author Mira Grant, a high-concept near-future thriller.

A decade in the future, humanity thrives in the absence of sickness and disease.

We owe our good health to a humble parasite – a genetically engineered tapeworm developed by the pioneering SymboGen Corporation. When implanted, the Intestinal Bodyguard worm protects us from illness, boosts our immune system – even secretes designer drugs. It’s been successful beyond the scientists’ wildest dreams. Now, years on, almost every human being has a SymboGen tapeworm living within them.

But these parasites are getting restless. They want their own lives… and will do anything to get them.


Thanks for the post, Mira… I think. I’m not sure I’ll be able to enjoy my sashimi like I used to but I’m looking forward to the new book. For you other Mira Grant/Seanan McGuire fans out there we’re collecting questions for an author interview this month so don’t miss your chance to Ask Mira Grant Anything.

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