Scott Weese
@scottweese.bsky.social
Infectious disease vet. Girl's hockey coach. Herder of (or herded by) critters and daughters
A tale of two species...
November 9, 2025 at 10:52 PM
A tale of two species...
The Universal Ostrich saga has come to a close, with CFIA culling the herd. There are a lot of layers to this scenario, and science has taken a backseat to politics, anti-government sentiment and grift.
Some final thoughts....
www.wormsandgermsblog.com/2025/11/arti...
Some final thoughts....
www.wormsandgermsblog.com/2025/11/arti...
H5N1 and ostriches…final thoughts
As the H5N1 ostrich debacle in British Columbia has come to a close, part of me wants to ignore all the crap that’s coming in, but there’s value in
www.wormsandgermsblog.com
November 8, 2025 at 1:03 AM
The Universal Ostrich saga has come to a close, with CFIA culling the herd. There are a lot of layers to this scenario, and science has taken a backseat to politics, anti-government sentiment and grift.
Some final thoughts....
www.wormsandgermsblog.com/2025/11/arti...
Some final thoughts....
www.wormsandgermsblog.com/2025/11/arti...
FDA has given Credelio (lotilaner) Emergency Use Authorization (EUA) for New World screwworm in dogs.
Game changer? No. We've always had extra-label options.
Useful? Yes, to provide some support for tx decisions and education.
1/n
Game changer? No. We've always had extra-label options.
Useful? Yes, to provide some support for tx decisions and education.
1/n
October 30, 2025 at 12:44 PM
FDA has given Credelio (lotilaner) Emergency Use Authorization (EUA) for New World screwworm in dogs.
Game changer? No. We've always had extra-label options.
Useful? Yes, to provide some support for tx decisions and education.
1/n
Game changer? No. We've always had extra-label options.
Useful? Yes, to provide some support for tx decisions and education.
1/n
I should stop checking my mailbox at work
Today, I got three registered mail
One is another notice from someone who’s fining me for failing to stop all vaccination of ppl in Canada. (If I had that much power, I’d have been able to score @BlueJays tickets for tonight).
1/n
Today, I got three registered mail
One is another notice from someone who’s fining me for failing to stop all vaccination of ppl in Canada. (If I had that much power, I’d have been able to score @BlueJays tickets for tonight).
1/n
October 24, 2025 at 11:29 PM
I should stop checking my mailbox at work
Today, I got three registered mail
One is another notice from someone who’s fining me for failing to stop all vaccination of ppl in Canada. (If I had that much power, I’d have been able to score @BlueJays tickets for tonight).
1/n
Today, I got three registered mail
One is another notice from someone who’s fining me for failing to stop all vaccination of ppl in Canada. (If I had that much power, I’d have been able to score @BlueJays tickets for tonight).
1/n
CFIA update about Universal Ostrich farm.
CFIA is respecting court orders and waiting, while caring for the birds.
Winter preparations are "based on the owners' description of past practices, but are limited by the poor condition of the few facilities on the farm".
1/n
CFIA is respecting court orders and waiting, while caring for the birds.
Winter preparations are "based on the owners' description of past practices, but are limited by the poor condition of the few facilities on the farm".
1/n
October 23, 2025 at 5:49 PM
CFIA update about Universal Ostrich farm.
CFIA is respecting court orders and waiting, while caring for the birds.
Winter preparations are "based on the owners' description of past practices, but are limited by the poor condition of the few facilities on the farm".
1/n
CFIA is respecting court orders and waiting, while caring for the birds.
Winter preparations are "based on the owners' description of past practices, but are limited by the poor condition of the few facilities on the farm".
1/n
Take home messages from this blog post...
Ozzie is a more effective tick dragger than me.
Ticks are seasonal and we're into black legged tick season.
Tick ranges are changing.
Check for ticks, on you and your animals.
Full details👇
www.wormsandgermsblog.com/2025/10/arti...
Ozzie is a more effective tick dragger than me.
Ticks are seasonal and we're into black legged tick season.
Tick ranges are changing.
Check for ticks, on you and your animals.
Full details👇
www.wormsandgermsblog.com/2025/10/arti...
Tick dragging, canine style
The other day, I did a half-hearted tick drag while walking Ozzie in our back field (yes, I know that’s strange, but let’s move on from that). It was far
www.wormsandgermsblog.com
October 21, 2025 at 11:39 AM
Take home messages from this blog post...
Ozzie is a more effective tick dragger than me.
Ticks are seasonal and we're into black legged tick season.
Tick ranges are changing.
Check for ticks, on you and your animals.
Full details👇
www.wormsandgermsblog.com/2025/10/arti...
Ozzie is a more effective tick dragger than me.
Ticks are seasonal and we're into black legged tick season.
Tick ranges are changing.
Check for ticks, on you and your animals.
Full details👇
www.wormsandgermsblog.com/2025/10/arti...
Following up on @PHAC_GC 's rather vague Sept notice about an outbreak of salmonellosis in ppl linked to pet food or treats, there's now a link with Puppy World and Puppy Love treats.
31 diagnosed (so likely hundreds of actual) infections
1/n
31 diagnosed (so likely hundreds of actual) infections
1/n
October 19, 2025 at 11:58 AM
Following up on @PHAC_GC 's rather vague Sept notice about an outbreak of salmonellosis in ppl linked to pet food or treats, there's now a link with Puppy World and Puppy Love treats.
31 diagnosed (so likely hundreds of actual) infections
1/n
31 diagnosed (so likely hundreds of actual) infections
1/n
Pet food and treat recalls because of Salmonella contamination.
Raw diets and Salmonella? No surprise. Assume contamination with something unless high pressure pasteurized (which reduces but doesn't eliminate risk).
1/n
Raw diets and Salmonella? No surprise. Assume contamination with something unless high pressure pasteurized (which reduces but doesn't eliminate risk).
1/n
October 12, 2025 at 12:28 PM
Pet food and treat recalls because of Salmonella contamination.
Raw diets and Salmonella? No surprise. Assume contamination with something unless high pressure pasteurized (which reduces but doesn't eliminate risk).
1/n
Raw diets and Salmonella? No surprise. Assume contamination with something unless high pressure pasteurized (which reduces but doesn't eliminate risk).
1/n
New World Screwworm (NWS).
Nasty, gross, re-emerging, but fortunately it doesn't like Canadian weather.
A NWS primer for Canadians.
www.wormsandgermsblog.com/2025/10/arti...
Nasty, gross, re-emerging, but fortunately it doesn't like Canadian weather.
A NWS primer for Canadians.
www.wormsandgermsblog.com/2025/10/arti...
New World screwworm...a primer for Canadian vet
I remember the first fly my myiasis (fly strike, maggot infestation) case in general practice. I was a very new grad called to look at a lamb owned by
www.wormsandgermsblog.com
October 3, 2025 at 7:43 PM
New World Screwworm (NWS).
Nasty, gross, re-emerging, but fortunately it doesn't like Canadian weather.
A NWS primer for Canadians.
www.wormsandgermsblog.com/2025/10/arti...
Nasty, gross, re-emerging, but fortunately it doesn't like Canadian weather.
A NWS primer for Canadians.
www.wormsandgermsblog.com/2025/10/arti...
I don't usually put up my talks (in part since I hate watching myself) but here's a quick one from a @walrus event about the complexities and nuances regarding antibiotics in animals, and the need to focus on health.
www.youtube.com/watch?v=2dL5...
www.youtube.com/watch?v=2dL5...
Dr. Scott Weese: Antibiotics are Overused in Animals
YouTube video by The Walrus
www.youtube.com
September 29, 2025 at 4:54 PM
I don't usually put up my talks (in part since I hate watching myself) but here's a quick one from a @walrus event about the complexities and nuances regarding antibiotics in animals, and the need to focus on health.
www.youtube.com/watch?v=2dL5...
www.youtube.com/watch?v=2dL5...
Oh Darwin's...why do we have to do this again?
FDA has yet again issued an advisory about Salmonella and Listeria contamination of Darwin's raw pet food.
The company has, yet again, not recalled the diet.
www.wormsandgermsblog.com/2025/09/arti...
FDA has yet again issued an advisory about Salmonella and Listeria contamination of Darwin's raw pet food.
The company has, yet again, not recalled the diet.
www.wormsandgermsblog.com/2025/09/arti...
Darwin’s Pet Food Contamination…again
Oh Darwin’s….here we go again. Yet again, the FDA has issued a “Do not feed certain lots of Darwin’s Natural Pet Products” warning. It’s a pretty regular
www.wormsandgermsblog.com
September 27, 2025 at 12:07 PM
Oh Darwin's...why do we have to do this again?
FDA has yet again issued an advisory about Salmonella and Listeria contamination of Darwin's raw pet food.
The company has, yet again, not recalled the diet.
www.wormsandgermsblog.com/2025/09/arti...
FDA has yet again issued an advisory about Salmonella and Listeria contamination of Darwin's raw pet food.
The company has, yet again, not recalled the diet.
www.wormsandgermsblog.com/2025/09/arti...
Fatal H5N1 influenza in 2 more cats fed a commercial raw diet.
Diet investigation is underway but it's the logical source for indoor cats.
Rare issue or rarely diagnosed? Probably a bit of both but I assume the known cases are the vast minority.
1/2
Diet investigation is underway but it's the logical source for indoor cats.
Rare issue or rarely diagnosed? Probably a bit of both but I assume the known cases are the vast minority.
1/2
September 26, 2025 at 3:15 PM
Fatal H5N1 influenza in 2 more cats fed a commercial raw diet.
Diet investigation is underway but it's the logical source for indoor cats.
Rare issue or rarely diagnosed? Probably a bit of both but I assume the known cases are the vast minority.
1/2
Diet investigation is underway but it's the logical source for indoor cats.
Rare issue or rarely diagnosed? Probably a bit of both but I assume the known cases are the vast minority.
1/2
Salmonellosis in people linked to pet food and/or treats, Canada .
PHAC warning about S. Oranienburg in 27 ppl, with 6 hospitalizations (and presumably a few hundred undiagnosed).
Tentative link to pet food or treats...kibble, dehydrated diets and/or freeze dried treats
1/3
PHAC warning about S. Oranienburg in 27 ppl, with 6 hospitalizations (and presumably a few hundred undiagnosed).
Tentative link to pet food or treats...kibble, dehydrated diets and/or freeze dried treats
1/3
September 20, 2025 at 11:57 AM
Salmonellosis in people linked to pet food and/or treats, Canada .
PHAC warning about S. Oranienburg in 27 ppl, with 6 hospitalizations (and presumably a few hundred undiagnosed).
Tentative link to pet food or treats...kibble, dehydrated diets and/or freeze dried treats
1/3
PHAC warning about S. Oranienburg in 27 ppl, with 6 hospitalizations (and presumably a few hundred undiagnosed).
Tentative link to pet food or treats...kibble, dehydrated diets and/or freeze dried treats
1/3
Gave a keynote address✔️
Met a British royal✔️
Got in the middle of a dog attack✔️
Talked to Birmingham police.✔️
Eventful 48h trip to the UK. More details below, with a focus on the dog bite aspect, obviously.
www.wormsandgermsblog.com/2025/09/arti...
Met a British royal✔️
Got in the middle of a dog attack✔️
Talked to Birmingham police.✔️
Eventful 48h trip to the UK. More details below, with a focus on the dog bite aspect, obviously.
www.wormsandgermsblog.com/2025/09/arti...
Dog Attack in the UK
Yesterday, I was in Birmingham, UK, giving a keynote address at the British Equine Veterinary Association Congress (and HRH Princess Anne was in the
www.wormsandgermsblog.com
September 13, 2025 at 4:09 PM
Gave a keynote address✔️
Met a British royal✔️
Got in the middle of a dog attack✔️
Talked to Birmingham police.✔️
Eventful 48h trip to the UK. More details below, with a focus on the dog bite aspect, obviously.
www.wormsandgermsblog.com/2025/09/arti...
Met a British royal✔️
Got in the middle of a dog attack✔️
Talked to Birmingham police.✔️
Eventful 48h trip to the UK. More details below, with a focus on the dog bite aspect, obviously.
www.wormsandgermsblog.com/2025/09/arti...
FDA issues notice about fatal H5N1 flu infection in a cat linked to a raw diet and the company responds.
Apologetic?
Not really.
Accept that there’s an issue?
No.
Indicate what they are doing in response to this problem to prevent problems in the future?
No.
Apologetic?
Not really.
Accept that there’s an issue?
No.
Indicate what they are doing in response to this problem to prevent problems in the future?
No.
September 4, 2025 at 8:20 PM
FDA issues notice about fatal H5N1 flu infection in a cat linked to a raw diet and the company responds.
Apologetic?
Not really.
Accept that there’s an issue?
No.
Indicate what they are doing in response to this problem to prevent problems in the future?
No.
Apologetic?
Not really.
Accept that there’s an issue?
No.
Indicate what they are doing in response to this problem to prevent problems in the future?
No.
Another cat death linked to H5N1 contaminated raw pet food.
Not surprising, unfortunately, and it's likely that other cats were affected since multiple lots were involved.
Raw food associated H5N1 infection is deadly but preventable.
www.wormsandgermsblog.com/2025/09/arti...
Not surprising, unfortunately, and it's likely that other cats were affected since multiple lots were involved.
Raw food associated H5N1 infection is deadly but preventable.
www.wormsandgermsblog.com/2025/09/arti...
H5N1 in raw pet food…out of sight but still killing
H5N1 avian influenza has dropped of the media radar lately (apart from the BC ostrich debacle, but that’s a separate story). That doesn’t mean it’s gone
www.wormsandgermsblog.com
September 4, 2025 at 11:12 AM
Another cat death linked to H5N1 contaminated raw pet food.
Not surprising, unfortunately, and it's likely that other cats were affected since multiple lots were involved.
Raw food associated H5N1 infection is deadly but preventable.
www.wormsandgermsblog.com/2025/09/arti...
Not surprising, unfortunately, and it's likely that other cats were affected since multiple lots were involved.
Raw food associated H5N1 infection is deadly but preventable.
www.wormsandgermsblog.com/2025/09/arti...
Rabies in an unmanaged cat colony.
No human cases but a large investigation.
Cat colonies aren't going away so we should manage them better. The amount of $ spent for this investigation could have covered a lot of spay/neuter/vaccination.
www.wormsandgermsblog.com/2025/08/arti...
No human cases but a large investigation.
Cat colonies aren't going away so we should manage them better. The amount of $ spent for this investigation could have covered a lot of spay/neuter/vaccination.
www.wormsandgermsblog.com/2025/08/arti...
www.wormsandgermsblog.com
August 28, 2025 at 1:16 PM
Rabies in an unmanaged cat colony.
No human cases but a large investigation.
Cat colonies aren't going away so we should manage them better. The amount of $ spent for this investigation could have covered a lot of spay/neuter/vaccination.
www.wormsandgermsblog.com/2025/08/arti...
No human cases but a large investigation.
Cat colonies aren't going away so we should manage them better. The amount of $ spent for this investigation could have covered a lot of spay/neuter/vaccination.
www.wormsandgermsblog.com/2025/08/arti...
New update for Firstline OVC-CPHAZ...open access antimicrobial prescribing guidance for dogs and cats.
firstline.org/ovc-cphaz/
firstline.org/ovc-cphaz/
OVC-CPHAZ
Acknowledgements This initiative was based on the Stewardship of Antimicrobials for Veterinarians Initiative (SAVI), led by the Cana...
firstline.org
August 28, 2025 at 1:13 PM
New update for Firstline OVC-CPHAZ...open access antimicrobial prescribing guidance for dogs and cats.
firstline.org/ovc-cphaz/
firstline.org/ovc-cphaz/
Raw pet diets containing what we expect raw pet diets to contain...pathogens.
But, this one was found so there's a recall.
Viva Raw diets.
www.fda.gov/safety/recal...
But, this one was found so there's a recall.
Viva Raw diets.
www.fda.gov/safety/recal...
Viva Raw Issues Voluntary Recall of Two Lots of Dog an Cat Foods Due to Salmonella and Listeria Monocytogenes Contamination
August 25, 2025 – Viva Raw LLC, Charlotte, NC is voluntarily recalling two lots of dog and cat foods due to contamination with Salmonella and Listeria monocytogenes. The recall is for Lot 21495 (Viva...
www.fda.gov
August 26, 2025 at 11:22 AM
Raw pet diets containing what we expect raw pet diets to contain...pathogens.
But, this one was found so there's a recall.
Viva Raw diets.
www.fda.gov/safety/recal...
But, this one was found so there's a recall.
Viva Raw diets.
www.fda.gov/safety/recal...
Who's liable when someone gets a raw milk-associated infection?
Raw milk is well known to be high risk, but if it's legal (bizarrely in many US states), who bears the responsibility?
Lots of people?
No one?
www.wormsandgermsblog.com/2025/08/arti...
Raw milk is well known to be high risk, but if it's legal (bizarrely in many US states), who bears the responsibility?
Lots of people?
No one?
www.wormsandgermsblog.com/2025/08/arti...
Raw milk infection lawsuit
I suspect that people in every decade since the 1940s have said “we really shouldn’t have to talk about why raw milk is bad anymore, should we”. But, we
www.wormsandgermsblog.com
August 25, 2025 at 1:04 PM
Who's liable when someone gets a raw milk-associated infection?
Raw milk is well known to be high risk, but if it's legal (bizarrely in many US states), who bears the responsibility?
Lots of people?
No one?
www.wormsandgermsblog.com/2025/08/arti...
Raw milk is well known to be high risk, but if it's legal (bizarrely in many US states), who bears the responsibility?
Lots of people?
No one?
www.wormsandgermsblog.com/2025/08/arti...
The Universal Ostriches fiasco may be nearing an end as the farm as lost its appeal of the cull order issued in January after an H5N1 outbreak.
The order led to legal challenges, blatant quarantine breaches, a convoy campout, claim of murder drones and....
1/2
The order led to legal challenges, blatant quarantine breaches, a convoy campout, claim of murder drones and....
1/2
August 23, 2025 at 1:28 PM
The Universal Ostriches fiasco may be nearing an end as the farm as lost its appeal of the cull order issued in January after an H5N1 outbreak.
The order led to legal challenges, blatant quarantine breaches, a convoy campout, claim of murder drones and....
1/2
The order led to legal challenges, blatant quarantine breaches, a convoy campout, claim of murder drones and....
1/2
Tritrichomonas diarrhea is a frustrating disease in cats, and it's currently even more frustrating since we have a hard time accessing effective drugs.
What can we do?
👇 www.wormsandgermsblog.com/2025/08/arti...
What can we do?
👇 www.wormsandgermsblog.com/2025/08/arti...
Tritrichomonas infections in cats, a treatment dilemma
Tritrichomonas blagburni (formerly T. foetus) is a frustrating cause of diarrhea in cats. This parasite causes chronic diarrhea that will most often
www.wormsandgermsblog.com
August 22, 2025 at 2:43 PM
Tritrichomonas diarrhea is a frustrating disease in cats, and it's currently even more frustrating since we have a hard time accessing effective drugs.
What can we do?
👇 www.wormsandgermsblog.com/2025/08/arti...
What can we do?
👇 www.wormsandgermsblog.com/2025/08/arti...
Baylisascaris procyonis, the raccoon roundworm....rare but potentially nasty cause of disease in people (and one that causes oversized angst in some ppl).
One part of our recent scoping review identified reported sources of infection.
1/n
One part of our recent scoping review identified reported sources of infection.
1/n
August 21, 2025 at 12:44 PM
Baylisascaris procyonis, the raccoon roundworm....rare but potentially nasty cause of disease in people (and one that causes oversized angst in some ppl).
One part of our recent scoping review identified reported sources of infection.
1/n
One part of our recent scoping review identified reported sources of infection.
1/n
Two children with neuro and ocular dz from the raccoon roundworm, Baylisascaris procyonis.
One full recovery.
One with severe longterm consequences (and a missed diagnosis).
There's a mix of excessive concern about this parasite by some and lack of awareness by others
1/n
One full recovery.
One with severe longterm consequences (and a missed diagnosis).
There's a mix of excessive concern about this parasite by some and lack of awareness by others
1/n
August 19, 2025 at 1:07 PM
Two children with neuro and ocular dz from the raccoon roundworm, Baylisascaris procyonis.
One full recovery.
One with severe longterm consequences (and a missed diagnosis).
There's a mix of excessive concern about this parasite by some and lack of awareness by others
1/n
One full recovery.
One with severe longterm consequences (and a missed diagnosis).
There's a mix of excessive concern about this parasite by some and lack of awareness by others
1/n
Contaminated raw pet food ✔️
Life-threatening illness in a child linked to the food ✔️
Ignored FDA recall notice ✔️
Business as usual, I guess.
Hemolytic-uremic syndrome in a child linked to E coli from raw dog food, but the company (again) has ignored recall requests.
1/2
Life-threatening illness in a child linked to the food ✔️
Ignored FDA recall notice ✔️
Business as usual, I guess.
Hemolytic-uremic syndrome in a child linked to E coli from raw dog food, but the company (again) has ignored recall requests.
1/2
July 31, 2025 at 12:42 PM
Contaminated raw pet food ✔️
Life-threatening illness in a child linked to the food ✔️
Ignored FDA recall notice ✔️
Business as usual, I guess.
Hemolytic-uremic syndrome in a child linked to E coli from raw dog food, but the company (again) has ignored recall requests.
1/2
Life-threatening illness in a child linked to the food ✔️
Ignored FDA recall notice ✔️
Business as usual, I guess.
Hemolytic-uremic syndrome in a child linked to E coli from raw dog food, but the company (again) has ignored recall requests.
1/2