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Parasites, Products, Deworming Rotation and Will the Worms Win?
Parasites, and Signs of Parasites
Parasite prevention is imperative to your horses well being. Performing the proper fecal tests to determine what parasites are present, is the place to start. It is wise to treat at the beginning of the grazing season. Treat for bots and tapeworms at least once a year. Rotate between active ingredients. Dose according to accurate weight and ask your vet any questions that may arise.
Signs of Parasites include distended belly or pregnant looking abdomen, dull coat, delayed or abnormal shedding, low energy level or dull attitude, abnormal growth and development, unexplained coughing and signs of suppressed immune systems, weight management problems, colic and or diarrhea.
Paste Dewormers by Chemical Class
Active Ingredients Works against (Types of Worms) Products
Ivermectin Lg & Sm Strongyles, Pinworms, Jeffers Ivermectin
Hairworms, Threadworms, Stomach Horse Health Ivermectin
Worms, Lungworms, Ascarids, Bots Bimectin, Zimectrin,
Equimectrin, Rotectin,
IverEase.
Moxidectin Lg & Sm Strongyles, Pinworms Quest
Hairworms, Stomach Worms,
Ascarids, Bots, and Encysted small
strongyles
Ivermectin and Praziquantel Lg & Sm Strongyles, Pinworms EquiMax,
Hairworms, Stomach Worms, Zimecterin Gold
Lungworms, Ascarids, Bots, and
Tapeworms
Moxidectin and Praziquantel Lg & Sm Strongyles, Pinworms, Quest Plus
Hairworms, Stomach Worms, Ascarids, Bots,
Encysted small Stongyles, and Tapeworms
Pryantel Pamoate Lg & Sm Strongyles, Ascarids, and Pinworms Exodus, Strongid,
Rotectin ,Liqui-Care
Fenbendazole Lg & Sm Strongyles, Ascarids, and Pinworms Safe-Guard, Pancur
(Rx only)
Oxibendazole Lg & bSm Strongyles, Ascarids, Threadworms Anthelcide EQ
and Pinworms
Pyrantel Tartrates Lg & Sm Strongyles, Ascarids, and Pinworms Daily wormers,
Strongid C,
Continuex,
Equi Aid CW
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Deworming Rotation Schedule
Rotation 1 Winter Rotation 2 Spring
Product: Safeguard Power Dose* Choose one of the following;
Administer two 25 gram syringes Jeffers Ivermectin
per 1100 lbs/day for 5 consecutive days Ivercare, Quest, Quest Plus,
For General Parasite Control & All stages Zimecterin, Zimecterin Gold,
of Encysted Sm Strongyles Combocare Gel, Rotectin 1.87%,
Equell, Equimax
Chemical Compound: Fenbendazole For General Parasite Control and
Bots & Tapeworms Chemical Compound: Ivermectin
or Moxidectin *(with Praziquantel)
Note Special Instructions * Horses in Southern U.S., should use the Power Dose* during the dormant season of late summer and a regular dosage during the winter.
Rotation 3 Grazing Season Summer Rotation 4 Grazing Season Summer
Choose one of the following; Choose one Safeguard or
Strongid, Rotectin P, Exodus Anthelcide EQ
For General Parasite Control For General Parasite Control
Chemical Compound: Pyrantel Chemical Compound: Fenbendazole or Oxybendazole
Pamoate
Note Special Instructions Zimecterin, Ivercare, Quest, Rotectin 1.87% and Equell users should consult a Vet for Tapeworm removal
Rotation 5 First Freeze (Fall) Rotation 6 First Freeze (Fall)
Choose one of the following; Choose one of the following;
Jeffers Ivermectin, Quest, Quest Plus, Strongid, Rotectin P, Exodus
Zimecterin, Zimecterin Gold, For General Parasite Control
Combocare Gel, Rotectin 1.87%, Equell, Chemical Compound: Pyrantel Pamoate
Equimax
For General Parasite Control & Bots &
Tapeworms
Chemical Compound: Ivermectin or
Moxidectin *(with Praziquantel)
Note Special Instructions Quest and Quest Plus should only be used on horses six months of age and older. Also ComboCare.
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Will the Worms Win?
Resistance to Dewormers or Anthelmintic products is a growing problem the world over. While we might not see "Super Worms" ravaging our equine companions, there is a pressing need to update deworming strategies and horse owners' perceptions regarding available deworming tools.
Internal parasite populations develop anthelmintic resistance when recommended doses of dewormers do not kill them as readily as they used to or at all. Populations have developed that are increasingly resistant to the drugs. With no new anthelmintic drugs on the market, how does this developing resistance impact horse owners? Will Super Worms develop as a result of this resistance?
The four major drug classes are:
Macrocyclic Lactones-(Ivermectin, Moxidectin)
Benzimidazoles-(Fenbendazole, Oxibendazole)
Tetrahydropyrimidines-(Pyrantel Pamoate, Pyrantel Tartrate
Prazino-Isoquinolines-(Praziquantel)
The important point here is that not all drug classes are effective against all types of parasites. Specifically, researchers have detected strongyle eggs in the feces of treated horses as early as two weeks post-treatment, which means eggs are reappearing more than twice as quickly as when Ivermectin was first marketed in the 1980's
Fight Resistance
Key ways that horse owners can help slow the developing resistance of internal parasites to all commercially available anthelmintics:
+ Use chemical anthelmintics smarter-test for need of particular dewormers
+ Follow the directions
+ Accurately estimate your horse's weight
+ Administer the full dose
+ Follow a Deworming Schedule
+ Pick up manure regularly
+ Evaluate your deworming in conjunction with testing, otherwise you'll have no idea if what you are doing is working?
+ Perform fecal egg counts at least once a year
Testing for Internal Parasites
Many available tests are capable of detecting one or more of internal parasites.
Examples od available tests include: Fecal floatation, Fecal Centrifugation, Home Fecal Test Kits and
ELISA (enzyme-linked immunosorbent assay) blood test for Tapeworms.
Information from the Internet and The Hoses, Your Guide to Equine Health Care magazine, May 2009 issue.
Talk to Terri about the Deworming Rotation we will use at the Ranch.
See below for contact information.
Terri Prater
Ranch Manager
Rancho San Cayetano
520-591-7504
All photos of horses on website are by Jack Nordeen Nature Photography
Fine Art Limited Edition Prints
402-741-0595
www.jacknordeen.com
jlnorde@megavision.com
9035 E. Weyburn Dr. Tucson, AZ 85730
Great pastures, covered stalls, 24/hr staff, pipe fencing, and smooth wire.
