Prevalence of PRRS virus in the United States.
Contributors: United States. Animal and Plant Health Inspection Service. Veterinary Services. Centers for Epidemiology and Animal Health.; National Animal Health Monitoring System (U.S.)
Series: APHIS Veterinary Services info sheet
Publisher: U.S. Dept. of Agriculture, Animal and Plant Health Inspection Service
Published: 1997
Place of publication: Fort Collins, CO
Language: eng
Subjects: Swine -- Viruses -- United States -- Epidemiology.; Swine -- Virus diseases -- United States -- Epidemiology.
Notes: Caption title.

"For more information, contact: Centers for Epidemiology and Animal Health, USDA:APHIS:VS, Attn. NAHMS"--P. [2].

"January 1997."

"N225.197"--P. [2].

Also available via the Internet.