RESEARCHERS SCORE ANAPLASMOSIS WIN

Kansas State and Iowa State researchers have developed an implant for anaplasmosis vaccine delivery.

Researchers at the Kansas State University College of Veterinary Medicine, in collaboration with Iowa State University, have developed a new vaccine delivery platform to produce long-lasting protection against anaplasmosis infections.

Bovine anaplasmosis, caused by the blood-borne parasite Anaplasma marginale, is the most prevalent tick-transmitted disease of cattle worldwide and causes significant disease loss to beef producers in the U.S.

“Currently, a common strategy to control anaplasmosis is to provide mineral or feed containing the antibiotic chlortetracycline to cattle on pasture,” says Andrew Curtis, doctoral research assistant in the laboratory of Hans Coetzee, professor and head of the anatomy and physiology department.

“This practice has raised concerns about the potential emergence of antimicrobial resistance in bacteria that may pose a risk to human and animal health,” Curtis says. “Although there is an experimental vaccine available to control anaplasmosis, it requires multiple injections and it has not been evaluated in published research studies.”

The objective of the College of Veterinary Medicine study was to develop a single-dose implant vaccine platform that provides long

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Changing of the Guard

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HBRL Equalizer 7510E

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term immunity against anaplasmosis infections by releasing vaccine contents over an extended period.

This new single-dose vaccine, which is administered in the back of the ear, has been shown to protect against clinical anaplasmosis for up to two years and could potentially help make anaplasmosis control more accessible and convenient to livestock producers, Curtis says.

“The concept of providing cattle with a single vaccine implant that could potentially provide lifelong protection against an economically devastating disease, such as bovine anaplasmosis, could revolutionize livestock production,” Coetzee said.

Iowa State University currently holds a patent for the implant platform and the K-State/Manhattan Innovation Center is exploring a partnership with Iowa State to further develop this technology.

The first step to a commercially available product would include finding a commercial partner to seek approval from the U.S. Department of Agriculture.

In addition to Curtis and Coetzee, K-State researchers involved with the project include Miriam Martin, Brandt Skinner, Shawnee Montgomery, Tippawan Anantatat, Kathryn E. Reif, Majid JaberiDouraki, Emily J. Reppert and Michael Kleinhenz. Researchers from Iowa State include Sean Kelly, Balaji Narasimhan and Douglas Jones. This project was supported in part by the Iowa Livestock Health Advisory Council and the faculty start-up funding provided by Kansas State University.

The study, “Rapid Communication: Development of a subcutaneous ear implant to deliver an anaplasmosis vaccine to dairy steers,” was published in the Journal of Animal Science.

Source: Kansas State University News Service

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FARM NUMBERS SHOW THE SMALLEST DIP IN RECENT HISTORY

The U.S. saw a loss of 5,800 farms in 2019 versus 2018, per USDA. But, that’s the smallest decline in recent years. Since 2012, the average year-over-year decline in the number of farms was around 12,000, with the biggest drop being between 2014 and 2015.

In 2019 the total number of farms in the U.S. totals 2,023,400. By far, Texas is the winner in farm numbers, with 247,000 farms.

TOP 10 STATES IN NUMBER OF FARMS 1. Texas: 247,000 2. Missouri: 95,200 3. Iowa: 85,300 4. Ohio: 77,800 5. Oklahoma: 77,300 6. Kentucky: 74,800 7. Illinois: 71,400 8. California: 69,900 9. Tennessee: 69,700 10. Minnesota: 68,000

The total land in farms, at 897,400,000 acres, decreased 2,100,000 acres from 2018. This slight year-over-year drop is on par with recent years and a sign farmland isn’t vanishing as quickly as some think.

The average farm size for 2019 is 444 acres, which is up one acre from the previous year. States in the West tend to have the largest average farm sizes.

TOP 10 STATES IN AVERAGE FARMS SIZE (ACRES) 1. Wyoming: 2,417 2. Montana: 2,164 3. Nevada: 1,821 4. New Mexico: 1,613 5. North Dakota: 1,506 6. South Dakota: 1,459 7. Arizona: 1,379 8. Nebraska: 982 9. Colorado: 822 10. Alaska: 810

Source: AgWeb

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