Health Management and Biosecurity in U.S. Feedlots, 1999. Part 3. Feedlot 99.National Animal Health Monitoring System

摘要

The National Animal Health Monitoring System's (NAHMS) Feed lot '99 study wasdesigned to provide both participants and those affiliated with the cattle feeding industry with information on the nation's feed lot cattle population for education and research. NAHMS is sponsored by the USDA: APHIS: Veterinary Services (VS). NAHMS developed study objectives by exploring existing literature and contacting industry members and others about their in for national needs and priorities. The US DA's National Agricultural Statistics Service (NASS) collaborated with VS to select a statistically-valid sample such that inferences can be made to 100 per cent of the cattle on feed in feed lots with a capacity of 1,000 head or more on January 1, 1999, in the 12 participating states. NASS enumerators collected on-site data from the 520 feedlots for the initial report via a questionnaire administered from August 16, 1999, through September 22, 1999.