Effect of Protein Supplementation

Brazilian researchers conducted an experiment to determine the effect of different levels of protein on parasite resistance and resilience of naturally-infected lambs. Sixty weaned Ile de France and Texel lambs (60 days of age) were divided into three groups, based on the level of protein in their concentrate ration: 1) low (8.5%); 2) moderate (15%); and 3) high (25%). The concentrate ration was fed at 3% of live weight. The lambs grazed native pasture (low protein). Evaluations were conducted bi-weekly. Average weight and weight gain did not differ among lambs in the three groups. Fecal egg count values of the low protein group increased significantly during the course of the experiment.

Resistant Rams in Demand

The ram test at Virginia Tech's Southwest Agricultural Research & Education Center (in Glade Spring) offers one of the few opportunities to buy rams with objective data on parasite resistance. In addition to being evaluated for parasite resistance in the test, a portion of the rams come from NSIP flocks and have EBVs for parasite resistance. Since 2012, the Virginia Ram Test has evaluated over 800 ram lambs. One hundred and seventy-seven (177) of the top-performing rams have been marketed and some of their progeny have come back to the test for evaluation. The rams have sold into fifteen states. At this year's sale on September 21st, thirty-six (36) rams sold for an average price of $1665. P

Determining Dewormer Effectiveness

How to determine the effectiveness of dewormers is another new video by Texas A&M AgriLife Extension. In the 7 minute 44 second video, Dr. Reid Redden discusses how farmers and ranchers can determine how effective dewormers are on their worm populations, including how to figure out when a dewormer is losing efficacy and should no longer be used as a single treatment. He also discusses why combination treatments are so much more effective. Dr. Redden is the Sheep & Goat Specialist for Texas A&M AgriLife in San Angelo. https://www.youtube.com/watch?v=DRBrc2VNMQE

Video on Dewormer Use

Best Management Practices for Deworming Sheep & Goats is a new video from the Texas A&M AgriLIfe Extension Service. In the 8 minute 11 second video, Dr. Reid Redden talks about the different classes of dewormers, how they work, and how to best use them when treating sheep and goats. Dr. Redden is the Sheep & Goat Specialist for Texas A&M AgriLife in San Angelo. https://www.youtube.com/watch?v=cZgwBbGucC0

New Fact Sheet on Nutrition

Another fact sheet in the Best Management Practices to Control Internal Parasites in Small Ruminants series has been published (#6). Nutritional Effects on Parasites was written by Dr. Steve Hart from Langston University (in Oklahoma). All of the Best Management Practices fact sheets will be written and reviewed by members of the American Consortium for Small Ruminant Parasite Control. Each review team will include a veterinarian. Most of the fact sheets will be published in 2018. Once complete, the fact sheet series will serve as a invaluable resource for producers and educators alike. Download Nutritional Effects on Parasites Go to the Best Management Practices Page

Are Males More Susceptible to Worms?

There is conflicting data as to whether males are more susceptible to gastrointestinal nematodes than females. It has been suggested that testosterone may have an immunosuppressive effect and that females may have a better immune response due to the role of prolactin. Another theory is that the more aggressive grazing behavior of males may result in increased levels of infection. However, most lambs are castrated at an early age and the differences between castrated males and females are not clear. Over a three year period (2001-2003), Scottish researchers used three generations of Scottish Blackface lambs (n=758; equal numbers of castrated male and female lambs) to evaluate the role of lam

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