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RE: [RC] Val Nicoson's deworming question. ALSO, general info ondeworming. - sharon1359

I just did a ton of research on current deworming information, so that I could
get my new rotation in order.  My information is from product labels and
veterinary websites.  But, if there are any vets or other folks out there who
have come up with different info, please feel free to let me know (sources for
your info would also help, so I can figure out where I went wrong).

***VAL: Yes, you'll still need to do the 5-day double-dose purge for Encysted
Strongyles with either Panacur or SafeGuard.***

But you may want to think about rotating your Ivermectin/Praziquantel (EquiMax
or Zim. Gold) with other drugs as well.  Not necessarily because of the worms
becoming resistant over time, but because even though that drug combination
does get a very wide spectrum of worms, it STILL misses some.  Below is a
summary I wrote up for a friend:

----------
Regarding drug types and effectiveness:

The drug class BENZIMIZADOLE includes two sub-types, OXIBENDAZOLE ("Anthelcide
EQ") and FENBENDAZOLE (Panacur and SafeGuard).  Of those two sub-types, the
Fenbendazole is effective against far more types of worms.  HOWEVER, each group
has some worms where it is the ONLY drug that will kill it.  Oxibendazole is
the only one that I found that will kill Large Roundworms, and Fenbendazole is
the only one that I found that will kill Encysted 3rd-Stage Small Strongyles
(also called just Encysted Strongyles sometimes)... and you have to give a
double dose over 5 days for it to be effective for that.

IVERMECTIN (Zimectrin, Equimectrin, etc.) will kill several types that aren't
killed by the Benzimizadole drugs... these types include Hairworms, Lungworms,
Large Mouth Stomach Worms, and Bots.

PRAZIQUANTEL, which is found mixed with either Moxidectin (QuestPlus AKA
ComboCare) or Ivermectin (Zimectrin Gold and EquiMax), is the only drug that
kills tapeworms.

When comparing the effectiveness of different drugs against different types of
worms, I did not include Moxidectin because my barnlord won't let us use it
anyway.  The information is below, though, in case someone wants it.

MOXIDECTIN (Quest) is effective against: Large Strongyles, Small Strongyles,
Encysted Small Strongyles in the Late L3 and L4 stages, Ascarids, Pin Worms,
Hair Worms, Large-mouth Stomach Worms, Horse Stomach Bots, and Neck
Threadworms.  It is not effective against Tapeworms, and does not seem to be
effective against Encysted Early 3rd Stage Small Strongyles, Roundworms, and
Lungworms.  I was unable to find any evidence of its reputed toxicity, although
I did find several studies where it was proven NOT to be toxic even with doses
of 5-6x the recommended levels.  The horses did get sick, but they recovered
with no permanent effects.

There is a very interesting rotational chart at
http://www.getrotationright.com/barnchartview.asp .  This chart is what got me
started on my research... I wanted to verify all the info independently because
the chart was put together by the makers of SafeGuard and Panacur.  ;)
----------

Sorry for all the extraneous information.  :)  I'm annoying that way.  LOL 
Again, if someone has contradictory info, please speak up... I'm no vet, I just
read a lot!

-Sharon Kenney & Zephyr's Elegant Gift




Going to use the new Equimax that is suppose to take
care of tapeworms in addition to the usual stuff.  My
question is:  Will I still need to do the 5-day Purge
or will the Equimax be sufficient?  If 5-day Purge is
still recommended...is that for the encysted
strongyles?

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