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Chiggers: May You Never Be Bitten

8/24/2018

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After picking blackberries two weeks ago, and subsequently suffering from the itchiest bites I have ever sustained, I am ready to share the results of my latest inquiry into...

Chiggers=Really Itchy Bites!

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It looks like a tick, but only if you use a microscope; these practically invisible mites are the larvae stage of an 8-legged arachnid. Boy's Life states: "Red bugs, chiggers, berry bugs, scrub-itch mites and harvest mites are all terms used to describe members of the family of insects known as Trombiculidae. These reddish-orange mites can be found worldwide, but they really enjoy hanging out in damp, grassy and wooded areas, especially at the edges of forests." Approximately 50,000 species have been described, although there are an estimated 1 million species currently living. 
I was lucky, I only picked up about 15 of these tiny creatures while out picking blackberries (which, to add insult to injury, were infested with fruit fly larvae); I woke up in the middle of the night with an intense itching in my belly button-seven bites-and the next morning found an additional eight bites around my waist and in the inside of my elbow and knee. (I am NOT including photos, as my bites are red, crusty, and oozy: impressively disgusting.)

I wondered...spider or flea bites? or, ewwww, bedbugs?
My research led me to confirm a textbook case of chiggers and to the prolonged and continuing study of the most effective way to stop the confounded itching.

First, from Dragonfly Woman:
Unlike many blood feeding insects and their relatives the ticks, chiggers have very short mouthparts. Those little dangly bits at the front end of the chigger in the picture above are the chelicerae, their mouthparts.  Now imagine the chigger in that photo shrunk down to a milimeter or a half milimeter in size, their actual size.  Like I said – very short mouthparts!  Chiggers don’t just eat the top layer of skin cells though – they go for the good stuff underneath.  To do this, they pierce the skin with their chelicerae, then inject saliva to digest the tissue and expand the wound.  The goop that is produced is slurped up by the chigger.  Remarkably, they also inject compounds into the wound that cause an immune response in the host animal, one that hardens the tissue around the bite site.  In essence, the hardened tube-shaped structure that forms (called a stylostome) is a straw that expands deeper and deeper into the host.  The chigger injects more saliva and sucks up more liquified tissue as the stylostome gets longer and longer.  That’s right!  Chiggers have tiny mouthparts, but they use their host’s own immune system to enlarge their mouthparts into a stylet like those of mosquitoes or a beak like those found in the true bugs!  Now if that isn’t amazing, I’m not sure what is.

So the chigger bites you, dissolves some of your tissue, and eats it.  Big deal, right?  Wrong!  These tiny little creatures are capable of producing some truly awful allergic reactions.  These aren’t the send you to the hospital, carry an epi-pen with you kind of response in most people.  Instead you itch.  You itch like you’ve never itched before.  Some people get massive itchy welts.  The itching is intense, so severe that people have been known to gouge welts out of their skin as they scratch and many people have reported that the pain of doing this and the ensuing scars are much easier to deal with than the itch of the bites.  Now the itching wouldn’t be so bad if it were just a few bites, but most people don’t get that lucky.  Instead they get tens or hundreds of bites from many individuals at one time (chiggers tend to be clustered together) that are located in inconvenient places (want to be observed scratching your armpit or your bra straps vigorously hundreds of times per day?) and don’t go away for 5-10 days.  That’s right – these little tiny animals can cause massive itching for 10 days or longer!  (Are you itchy yet?)

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Along with experimenting with all of the above remedies, I would take 25-50 mg of Benadryl when the itching became intolerable (and also when my belly had a dessert-plate sized rash on it, which was most of the second week) once or twice a day, and especially before going to bed. I kept a bag of frozen peas and used that often, along with Ibuprofin. In addition, I dapped the wounds with tea tree oil and honey, for their antibacterial goodness, and also tried Cortisone*10 cream with aloe, and Aveeno's Anti-Itch concentrated lotion with triple oats and calamine. Taking an oatmeal bath is a lovely temporary solution, but-honestly, nothing really works.

I am two weeks in and considering using the Swiss Army knife cure. Arghhhhh.
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How do Insects Breathe?

8/23/2018

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Hmm, I had no idea-really. So...googled it, and the first answer came from "Ask an Entomologist"
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This second image is a still-shot of a really cool gif created by Seattle's Eleanor Lutz (and if I ever figure out how to embed the gif, I will update this post!) Meanwhile:
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I will have more interesting bug research for you soon, but wanted to lead with some fun facts. Enjoy!  (and be sure to check out Tabletop Whale for additional awesome science illustrations!)
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Monsanto found Guilty

8/15/2018

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In case you missed it:
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How to honor the victims? Get the poisons out of the schools!
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    Author

    Tracey Byrne~

    I taught K-12 students from north of the Arctic Circle to the Puget Sound Ecoregion, garnering  40 years of experience as a classroom teacher, learning mentor, and private tutor. 

    I spent most of the 1980s and 90s in Alaska flying airplanes, floating wild rivers, winter camping, teaching, parenting, and living off the grid. 

    Here in Seattle, I am an advocate for environmental stewardship, place-based education, and outdoor play. I share my enthusiasm for birds, bugs, and backyards and have been a featured writer and photographer for Pacific Horticulture. 
    ​

    All photographs © T. Byrne unless otherwise noted.

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