Monday, February 15, 2010

Panleukopenia and Distemper...

Hansel,
I've completed this posting in responce to your last comment. (I am hoping you don't mind my sharing the responce here...I just thought that others might find the information contained within the reponse useful as well...and if not useful then interesting in the very least.)
:)

Ok let's begin...to start, let's stick with the term panleukopenia. The term feline distemper is actually very misleading. As far as I know the actual distemper virus has never been recorded in felines. The panleukopenia virus is actually a member of the parvoviridae family of viruses and belongs to the parvovirus genus, where as the distemper virus is a member of the paramyxoviridae family of viruses and belongs to the morbillivirus genus. When people speak of distemper in felines what they are actually referring to is Panleukopenia, a parvovirus, where as when people speak of distemper in canines they are referring to a morbillivirus.

Panleukopenia is a ssDNA (single stranded DNA) virus, where as distemper is a ssRNA (single stranded RNA) virus, therefore calling panleukopenia, feline distemper is quite misleading, since the replication of these two viruses is quite different.

If you are interested in learning more about the taxonomy of viruses, you can visit the International Committee on Taxonomy of Viruses, which lists viruses based on the Baltimore Classification system. The site is actually very informative and includes very detailed information on viruses such their gene sequence, which can be listed either in full or part. Here is a link to their website...
http://www.ncbi.nlm.nih.gov/ICTVdb/Ictv/index.htm

Now in regards to the actual Panleukopenia vaccine. It does in fact come in both a killed vaccine form and an MLV (modified live virus) form. Drug manufacturing companies such as Pfizer and Merial both sell the vaccine in a MLV form.

http://www.pfizerah.com/PAHimages/compliance_pdfs/US_EN_FF_compliance.pdf


http://www.merial.ca/cats/purevax.asp

So now I need to figure out which form of the vaccine was given to Moki. If the vaccine was in fact in an MLV form, then nucleotide substitutions could have occured during the viruses replication, which in turn could lead to a new strain of the virus being created...

Here are a few interesting facts about Panleukopenia, (i'll have to explain their importance in regards to Moki's condition in another posting...):

1. Panleukopenia does not need a cell in order to survive in a host's system.

2. Panleukopenia does however need to find a rapidly dividing cell line such as the purkjie cell line found in the cerebellum of a developing fetus, in order for the virus to undergo replication. The reason the virus needs a rapidly dividing cell line in order to undergo replication has to do with the viruses capsid size which is so small that the viruses genome can only encode a few proteins. The virus thus depends on a host's cell in order to provide the missing proteins not encoded in the viruses own capsid, proteins such as a DNA polymerase which are only available during the S phase of a cell cycle.

3. "Cerebellar degeneration and myocardities may develop in kittens and puppies respectively, from virulent parvovirus or MLV vaccine virus infection."

http://www.vin.com/proceedings/Proceedings.plx?CID=WSAVA2003&PID=6547&O=Generic

To be continued...

27 comments:

Brian said...

WOW! I have no idea what that means, but I'll bet it's gonna help somebody!

Hansel said...

the feline distemper has a whole bunch of things in it though- and it does include the panleukopenia IN it is all i meant. and the FVRCP vaccine is a distemper vaccine- and that has panleukemia in it- they just call it the feline distemper vaccine. I'm not saying the distemper did it- but it has like 4 parts in it. 4 different things are inside the actual vaccine. I was responding to your FVRCP vaccine.

ABBY said...

Very interesting!
Abby

Sparkle said...

I am SO impressed by all your research, and am learning all sorts of new things. So glad you are diligently searching out the cause of Moki's problem - I think this will benefit lots of kitties!

Anonymous said...
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Anonymous said...

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オテモヤン said...
This comment has been removed by a blog administrator.
Zippy, Sadie and Speedy said...

Oh, maybe this research can help prevent this from happening to other kitties...or find a way to fix Moki's problems. We hope Moki's doing well.

Brian said...

Hey, I just stopped by to say Happy Birthday to you Mom Crystal!!!

The Creek Cats said...

Happy Purrthday, Mom Crystal!

Furkidsmom said...

Happy Birthday to Mom Crystal! We hope you're having a super day.

Sniffie and the Florida Furkids

Ikaika said...

Happy Birthday Crystal ... wishing you and Moki well!

Excellent and informative post on panleukopenia and distemper. You've made the information most accessible.

'Kaika's mom

Jan's Funny Farm said...

Happy Birthday, Mom Crystal!

有甚麼新歌 said...
This comment has been removed by a blog administrator.
Cats of Wildcat Woods said...

My holistc vet warns about vaccinations - she has seen so many pets get very ill after vaccinations so you sound like you are on the right track. Good luck with your investigations! Happy Birthday too.

Junior and Orion said...

We so hope that this will lead to a way of helping Moki, and if not him, then other cats in the future.

Happy belated Birthday!

Please give Moki a big hug for our Meowm!

Anonymous said...

I read a article under the same title some time ago, but this articles quality is much, much better. How you do this?

Anonymous said...

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Anonymous said...

Good fill someone in on and this mail helped me alot in my college assignement. Thank you as your information.

Melody said...

We are sending prayers your way Moki. Hope you get to feeling better.

Paws & Whiskers
Jude,Poo,Babybella,Piper&Marley

炒飯 said...
This comment has been removed by a blog administrator.
Anonymous said...

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Anonymous said...

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佩璇 said...
This comment has been removed by a blog administrator.
Furkidsmom said...

We miss you and we hope things are going okay for you.

Happy Easter!

Sniffie and the Florida Furkids

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