Economically, one of the best things producers can do for their cattle is deworm.

Over time, parasites take a toll on reproduction, weight gain and body condition in the herd, so in an industry measured by pounds that translate into dollars, deworming is a must. 

In 2012, Merial introduced LONGRANGE® (eprinomectin), the first extended-release injectable cattle dewormer that provides season-long persistent parasite control for up to 100 to 150 days in a single subcutaneous dose, dependent on parasite species.

After a product is released, it’s common to begin making product comparisons, leading Merial veterinarians and researchers to study how LONGRANGE can impact average daily gain (ADG) in cattle herds compared to conventional dewormers.

Throughout the 2013 grazing season, 15,205 steer and heifer stocker calves from multiple locations across the United States were studied on 18 site locations, representing a cross-section of grazing environments and pastures, to determine the effect on ADG of pens of cattle administered a single dose of LONGRANGE compared to other common deworming practices.

The study proved that cattle treated with LONGRANGE had a significantly higher (p<0.01) ADG than cattle treated with conventional dewormers. This included individual comparisons against four commonly used dewormers and comparisons against six combiniations of two or more conventional dewormers.

The results yielded an ADG difference of 0.28 lbs./day. At today’s prices, that’s an extra $56 per head.
LONGRANGE also demonstrated a higher ADG when broken out between heifers and steers – the difference was 0.22 lbs./day for the heifers* and 0.31 lbs./day for the steers.

The calves receiving treatment – with average weights ranging from 352 to 786 pounds – were studied on operations in nine states: Colorado, Iowa, Idaho, Nebraska, North Dakota, Oregon, Texas, Virginia and Wisconsin.

Animals received health observations regularly at every operation. At each location, animals in Treatment Group 1 (LONGRANGE) and Treatment Group 2 (conventional deworming product(s)) were maintained on separate but similar pastures with similar stocking rates. There were 8,014 calves assigned to Treatment Group 1 and 7,191 calves assigned to Treatment Group 2. Days on pasture ranged from 37 to 154 for Treatment Group 1 and 52 to 154 for Treatment Group 2.

ADG was calculated for each pasture group by subtracting the average weight in (total weight in by number of animals in) from the average weight out (total weight out divided by number of animals out), and dividing by days on pasture and rounding to the nearest 0.01 pound.

Because every situation is different, producers should consult their veterinarian to develop a strategic deworming protocol that will meet the specific needs of their operation and herd.

LONGRANGE is available through a prescription from a veterinarian. To learn more about how LONGRANGE can save an operation precious time, money and resources, visit theLONGRANGElook.com.
 
IMPORTANT SAFETY INFORMATION FOR LONGRANGE: Do not treat within 48 days of slaughter. Not for use in female dairy cattle 20 months of age or older, including dry dairy cows, or in veal calves. Post-injection site damage (e.g., granulomas, necrosis) can occur. These reactions have disappeared without treatment.

IMPORTANT SAFETY INFORMATION FOR IVOMEC POUR-ON: Do not treat cattle within 48 days of slaughter. Do not use in dairy cattle of breeding age or in veal calves. Do not use in other animal species not on the label as severe adverse reactions, including fatalities in dogs, may result.

IMPORTANT SAFETY INFORMATION FOR IVOMEC 1% INJECTION: Do not treat cattle within 35 days of slaughter. Do not use in dairy cattle of breeding age or in veal calves. Do not treat swine within 18 days of slaughter. Do not use in other animal species not on the label as severe adverse reactions, including fatalities in dogs, may result.