Question Details
Masticatory Myositis In A Dog
by DrHeather - April 16, 2024    View Case Report
Teddy is a 5 year old intact male Chocolate Labrador. I met him 4/15/24.

He lives in the Northeast USA. His owner is an L.Ac. and Chinese herbalist. Teddy eats a home cooked diet of chicken, beef, vegetables, and herbs. He used to eat a raw diet, but the other dog in the home cannot tolerate raw food.

Current medical situation began December 2023 when owner noted Teddy was "red, sunken under the eyes." Ocular discharge progressed to reverse sneezing, then coughing, then vomiting and dysphagia.

He became increasingly lethargic and inappetant.

In early February, Teddy became acutely blind. The primary care vet had been treating symptomatically but referred to neurology specialists when blindness occurred.

MRI and spinal tap showed diffuse meningitis, inflammation of cranial nerves and of the jaw muscles. CSF had elevated protein and WBCs. Infectious disease testing was negative.

Teddy responded to steroids. He was also Rx'd clindamycin, clavamox, and enrofloxacin. He also took Cerenia and famotidine. He continued to gag and vomit bile and/or food.

Antibiotics have been stopped but when owner attempted to wean off prednisone, within 2 weeks his clinical signs returned.

His vision appears to be returning. In my office his eyes were clinically normal, with symmetrical pupils and normal PLR. Masticatory muscle wasting is significant. No other muscle loss is apparent.

He is cool-seeking, eating snow in February.

Significant health history: mid-May 2023 Teddy received 3 vaccines, Lepto, Distemper, Rabies. Early July he developed pink/red penile discharge, with two 1-1.5cm red/purple growths on his penis.

Transmissible Venereal Tumor was ruled out, Dx balanitis. He vomited when taking antibiotics for this issue.

Currently Teddy's active problems include GERD/regurgitation/acid reflux, he is recovering from masticatory myositis (currently not painful, can use jaw), recovering from optic neuritis and cranial neuropathy.

The owner has tried an assortment of Chinese herbs, currently offering a customized formula of Banxia Xie Xie Tang + Bai Zhu, Bai Zhi, and Sheng Di. We agree this is too bitter and has exacerbated GERD signs.

PULSE: superficial, rapid, forceful, hard to compress
TONGUE: red with pale, scalloped, thin edges; sticky with white foam

First tried SP6 and pulse got short and deep. Pulse balances with tonification of GB34, improvement continues with addition of UB17.

I feel like the vaccine assault in May probably triggered a Shao Yang disharmony, evident as balanitis in July.

He's also tested positive for tick exposure. We have a ton of ticks here in the Hudson Valley, a ton of Lyme Disease and of course all the other tick borne diseases that may or may not show up on blood testing.

There's a deep-seated pathogen I feel, and eventually I think Qin Ying Tang would be appropriate -- but now? To start?

I'm thinking Xiao Chai Hu Tang is a good base formula at this point but wonder if one of the derivatives would be better?

I'd love support, this owner is more fluent in single herbs than I am and I do not want to send her on a wild chase by guessing.

Thank You!
Heather
Replies
by naturevet
April 27, 2024
Hi Heather,

I like your idea of Qing Ying Tang. It is a Shao Yang formula and has everything needed to guide a heat pathogen back out of the body. So, too, does Chai Ge Jie Ji Tang (Bupleurum and Kudzu Clearing Formula) which invariably the best formula for meningitis and its sequelae. The latter fits the pulse you're seeing perfectly, but I would be tempted to use both.
There will be some bitterness to the formulas, but I suspect the BXXXT was just off the mark and that's why it wasn't working.
I'd be shocked if you don't see a full recovery. Sometimes a Blood tonic like Bu Gan Tang is needed at the end to flesh out jaw muscles, but the Shao Yang needs to be gotten under control first.
I agree that vaccination likely set the stage for this. Future vaccination should be done based on risk of exposure, as determined by geography and titer testing.

Let us know how this interesting case goes!

Steve
by DrHeather
April 29, 2024
Steve, thanks for this response.

I sent Teddy home with XCHT because that is what I had in stock on my sparsely stocked office shelf. It was helping. He was doing better.

Then he spiked a high fever. He spent the night in hospital, and in the morning, he died.

The owner is devastated. I can't find out if a necropsy was done.

Not the ending I anticipated or hoped for!

Thanks again for the support.

Heather
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