It's not just a packer issue — liver abscesses
reduce feedlot cattle performance

Elanco’s Liver Check Service — understanding the Tylan difference

Losses due to liver abscesses can be significant to feedyards and packers, with estimated annual losses of $15.8 million to the U.S. beef industry.1 Severe liver abscesses lead to both reduced live performance and decreased carcass performance in cattle.1

To support feedyards in managing liver abscesses, Elanco offers the liver check service for qualified customers. Our liver check service helps identify the prevalence of liver abscesses at your feedyard, providing individual, regional and historical data and analytics to help you make data-driven management decisions with confidence. 

Understanding the contributing factors that lead to liver abscesses, such as days on feed and feed type, a feedyard can make adjustments in bunk management practices by increasing roughage levels, managing feed additives or modifying days on feed to impact their abscess rates.

Since 1985, Elanco has checked livers on more than 42 million head of cattle.2 This commitment to capturing data and understanding liver abscess prevalence is what allows Elanco to work with customers to determine solutions to improve both cattle performance and their bottom lines. With Elanco’s analytic capabilities including the liver check data and Benchmark® comparisons Elanco can help you find actionable insights for continuous improvement in your operation.

Liver abscess classification

Liver abscesses can occur at all ages and in all types of cattle. At harvest, livers are visually evaluated by Elanco liver checkers on size and occurrence of abscesses, which correlates to abscess severity (0, A, A+). Liver abscesses lead to lower-yielding beef carcasses.3 More severe liver abscesses typically involve more carcass trimming, directly affecting profitability.

With O: No abscesses — a normal, healthy liver

With A: One or two small abscesses, or up to two to four well-organized. abscesses, which are generally under one inch in diameter. The remainder of the liver is healthy in appearance

With A+: One or more large abscesses are present, along with inflammation of liver tissue surrounding the abscess. Often, portions of the diaphragm are adhered to the surface of the liver and have to be trimmed to separate the liver from the carcass


Tylan Premix
For reduction of incidence of liver abscesses associated with Fusobacterium necrophorum and Arcanobacterium pyogenes: Feed continuously at 8 to 10 g/ton of tylosin (90% DM basis) to provide 60 to 90 mg/hd/d.

Important safety information

The label contains complete use information, including cautions and warnings. Always read, understand and follow the label and use directions.

1. Hicks, B. 2011. Effect of liver abnormalities on carcass merit. Oklahoma Panhandle Research and Extension Center Beef Cattle Research Update. Available: Accessed July 16, 2012.

2. Elanco Liver Check Service. 1985 to Q4 2014. Data on file.

3. Elanco study. Influence of Tylan on liver abscesses and animal performance. A 40-trial summary. Data on file.