FUNGAL INFECTION

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kelly
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FUNGAL INFECTION

Post by kelly »

i dont know if anyone remembers my posts about my westies bald spot!1
the vet now seems to think that it could be MICROSPORUM CANIS
Has anyone heard of this???
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Traci
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Re: FUNGAL INFECTION

Post by Traci »

AKA Ringworm. If your vet suspects this is ringworm, he needs to do a culture to confirm.

Ringworm can spread between canines, felines and people, so make sure your dog is correctly diagnosed, and follow proper disinfection procedures, as explained by your vet. Be careful, if you get a rash, you'll have to see your own physician and get treated.

Ringworm can be difficult to eradicate, so expect at least 4 weeks of treatment, but I would suggest a reculture after that to ensure it is completely eradicated.
..........Traci
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davet
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Re: FUNGAL INFECTION

Post by davet »

and do't be surprised if it looks worse for a few days after treatment starts but it will improve---and be sure to check yourself occaisionally for spots
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kelly
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Re: FUNGAL INFECTION

Post by kelly »

vet has put him on steroids????
why would this be!!
there is no scabbing the way i have seen ring worm in cattle it just looks as if the hair has fell out!!
my friend says it could be low thyroid as her dog lost its hair in nearly the same place!!
i work in the lab in the hospital (micro dept) and we put up some plates of swabs am going to take skin scrapings as well to see what grows as nothing grew from the swabs!! (well nothing that shouldnt grow in an animal swab)
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davet
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Re: FUNGAL INFECTION

Post by davet »

you might take some hairs to the lab and check them under a scope to see if any ringworm goodies ( obviously i forget the terma) show up,,,they usually are pretty obvious b ut a culture should show you something....and i suspect the steroids are to ease the itching so lick trauma or scratch trauma don't aggrevate it....
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k9Karen
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Re: FUNGAL INFECTION

Post by k9Karen »

kelly - I also work in microbiology. How long did you wait for the cultures to grow? M.canis can take 2 weeks (usually takes at least a week) to start growing (incubate at room temp or 30 cegrees C, not 35), and do you have fungal media that will inhibit bacterial growth? If not, tiny fungal colonies could have been hidden or even killed by the toxins produced by the bacteria. Like you, I don't understand the use of steroids without the concurrent use of antifungals. Yes, they will work for the itch and help prevent scratching and digging, but they will also encourage the growth of any fungus. Did you ask you vet about it?
"A dog is the only thing on earth that loves you more than he loves himself." ~ Josh Billings.
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kelly
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Post by kelly »

vet says that microsporum canis is usually only seen in cats!!
it has been put up on fungal plates, ba,cna,naba,aba.
and the ba cna etc grew coag neg staph!!
there is a small fungus growing on the fungal plates stored in the 30 incubator!!
i am only an mla in the lab and get confused with some terms like didnt realise there where so many different types of ring worm

MICROSPORUM GYPSEUM contaminated soil usually cause
TRICHOPHYTON MENTAGROPHTES rodents usually cause
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Traci
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Re: FUNGAL INFECTION

Post by Traci »

Actually, the type of dermatophyte can also largely depend on your geographical location, so M canis may indeed be your culprit.

One technique you can do is choose an obvious infected area, pluck some hairs from that area (be sure to get the full hair shaft), see if it florescences under a wood's lamp (will probably show up as an apple green, but don't rely on this specifically, there can be false positives).....If it does florescence, then use that sample for the culture (25-30 C)
..........Traci
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k9Karen
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Re: FUNGAL INFECTION

Post by k9Karen »

I had an infection with M.canis about 17 years ago - right on my chin - got it from my neighbor's cats! (and boy did it itch!) Those cats gave it to every kid in the neighborhood (or the kids gave it to them, :wink: ). (OK, maybe I got it from my kid!). So, although this is found commonly in cats, it can infect other species, and the name itself ("canis") is due to the fact that it was first found on canids. We isolate more Trichophyton than Microsporum in our lab, but we do see it fairly often.

Help me understand the media. I know BA and CNA. I'm assuming they are sheep blood agar (TSA with 5% sheep blood) and colistin-naladixic acid agar (TSA with 5% sheep blood and CNA), but what are naba and aba? I'm not familiar with those abbreviations. What does the small fungus that's growing look like? Has anyone done a microscopic exam on it yet?. Do you have any potato flake or potato dextrose agar available to you? I've found that both of them usually work very well to encourage the fungi to sporulate so they can be identified.
"A dog is the only thing on earth that loves you more than he loves himself." ~ Josh Billings.
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kelly
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Re: FUNGAL INFECTION

Post by kelly »

BA AND CNA IS MADE WITH HORSE BLOOD OVER HERE!!
NABA AND ABA ARE ANAEROBIC BLOOD AGARS WITH ANTIBIOTIC!!
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