Hello everyone! I’m dealing with quite the odd situation right now and I’d love other opinions. Before I get into it there is a bit of context you need to know about me, and the situation.
- I am a literal herpetologist (gone through schooling) who’s been working with various exotics (reptiles, fish, amphibians, and some arachnids) for over 10 years.
- I own and run an educational exhibit, we have dozens of types of fish, over 100 species of reptiles, and a handful of amphibians and arachnids. We have a dedicated QT room with protocols so we don’t often deal with issues in our main collection. This place is also a rescue, meaning new animals frequently are surrendered (it’s run similarly - but not identically - to snake discovery).
- I’ve dealt with mites many times over the years and generally know the to-do; isolate in a tote with white paper, treat until mites are gone and continue treatment for 3 weeks after the last sighting. We have volunteers and typically when mites show up we send the affected animal to a volunteers house (who don’t have other reptiles) and they don’t come into the facility until it’s done.
- Everytime an animal comes out (which every one comes out at least 2-3 times weekly), we check them over for mites (and other issues, listen for respiratory issues for example).
- Our typical treatment is ivermectin, dosage varies by species and size but it’s always worked before for us.
With that out of the way, here’s The current situation
Rose, a roughly 7 year old BCI, was patient zero. Rose is a longstanding resident of our exhibit who’s out in the middle of the exhibit surrounded by other reptiles. She was examined 10/13 and no mites were found, on 10/15 during a routine handling we noticed them. She was immediately taken to our QT space, volunteers weren’t free to take her until 10/22, so unfortunately she had to stay onsite for about a week. Our leading theory on where the mites came from was the substrate, hers had recently (the last two weeks) been replaced (we do typically freeze it, but the replacement was done by a volunteer who forgot to used the freeze substrate).
Being that rose is a part of a wall of enclosures we spent the next few days stripping down and inspecting every enclosure in the wall, we found one singular mite on the snake directly next to her, but outside of that nothing. Regardless we have stripped and treated all other enclosures and done preventative treatment on the animals inside them. To date no one else is displaying anything. To date We also haven’t seen mites show up on any of the other animals in the QT room she had to be moved to temporarily.
Rose herself however, that’s a different story. The first few days we were seeing 40-60 mites every day (mostly dead on the paper, we’d see maybe one or two alive). Most of them were tiny, definitely not adult mites (looking like they recently hatched), which leads me to believe they likely hatched out in the substrate and swarmed her. She has now been with volunteers since 10/15, receiving ivermectin treatments every other day and soaks daily (soaks would happen before spray treatment). Her entire bin is also sprayed and treated daily. The odd thing is that well over a dozen mites are still showing up every day. All of them dead, volunteers say they haven’t seen any actually alive (last live crawling mite was seen 10/19). Now rose is a fairly big girl (roughly 7’) and it’s hard to check under every scale.
My question is this: At this point, would you switch to a different treatment assuming the mites are resistant to ivermectin (and if so, what treatment) OR would you assume there were just way more mites that hatched out than we thought and it’s just taking time for them to come off of her. Any other theories, thoughts, or ideas are also welcome.
And to clarify one more detail, to this day we have not seen a single mite on any other animal (other than that singular one found on her neighbor the day after who got treatment the same as her). We have been treating them regardless, and look them over daily, but I don’t believe the mites have been around longer than I think as if they were I would expect to find them on other animals as well.
Attached are photos of the mites under a microscope, and Rosey, the boa that’s dealing with them.