Why deworming in the fall makes sense

Author: Kristy

Merial  |  Updated: 08/18/2014


We’ve all heard the horror stories associated with parasite infestation on pastures – cattle producers lament and studies show that parasite infections can lead to a number of herd health problems, including negative effects on the immune system, decreased appetites, decreased weaning weights and lower conception rates.

And as we all know, poor herd health can directly impact producers’ bottom lines, rendering a well-planned deworming strategy more crucial to a prosperous operation than some realize.

According to Dr. Joe Dedrickson, DVM, Ph.D., Merial Veterinary Professional Services, the most effective way to manage parasite control is to break the parasite life cycle completely, which can best be achieved with a long-acting dewormer. LONGRANGE (eprinomectin) is the first – and only – of its kind on the market, offering up to 100 to 150 days of continuous parasite control with one subcutaneous injection.

Because season-long protection can be attained with a single dose, many veterinarians, including Dedrickson, recommend that producers introduce fall deworming into their parasite control strategy if they haven’t done so already. The active pharmaceutical ingredient found in LONGRANGE lasts much longer than those found in conventional dewormers, helping producers finally find a viable solution to the frustrations and implications of pasture reinfection.

“The length of a dewormer’s activity is more important than many people give it credit for,” Dedrickson says. “Depending on the parasite, conventional dewormers only offer two to six weeks of control. But with LONGRANGE and its extended duration, producers can save significant time and energy, allowing them to focus on other areas of their operations.”

On paper, administering LONGRANGE in the fall as well as the spring may seem like a great idea, but how does it pan out in real life?

Robert Conley, a respected livestock producer in Georgetown, Ky., is one of many who have noticed vast improvements in his herd after incorporating a fall deworming protocol with LONGRANGE.

“When you take into consideration the risk, stress and labor that goes into getting the herd through the chute, it’s absolutely worth it to use LONGRANGE,” Conley says. “When my cattle go out to pasture, I know the lengthy duration of LONGRANGE will save me two or three dewormings that I would have to manage with another product. In the long run, that saves me money.”

He plans to continue the practice well into the future. Dedrickson supports that decision, emphasizing that continuous herd health is vital to any producer’s financial success.

“That’s the whole thing about fall – if you have cattle out on the grass, there is certainly a need for parasite control,” Dedrickson says. “It is clear to me that up to 100 to 150 days is better than only a few weeks.”

Of course, each producer’s specific situation is different, so it’s important to consult your veterinarian when developing a tailored parasite control problem.

LONGRANGE is available through a prescription from your veterinarian. For more information about how you can incorporate LONGRANGE into your deworming strategy, visit

Posted in In The Industry |

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