Upregulation of the type I interferon pathway in feedlot cattle persistently infected with bovine viral diarrhea virus.

Bovine viral diarrhea virus (BVDV) has a profound economic impact on the cattle industry. Calves infected in utero and born persistently infected (PI) with BVDV have increased morbidity, mortality, and reduced productivity. Further, they serve as a continual source of viral exposure to herd mates and thereby pose a significant risk to animal wellbeing and production efficiency.

Management of Confined Cattle in Blizzard Conditions.

Preparation and prioritization are essential to managing confined cattle through a severe winter storm. Water, feed, and cattle comfort are the top priorities for cattle after a blizzard, and making sure employees understand those priorities and how to address them will help to minimize cattle stress and losses.

Resolving Bovine viral diarrhea virus subtypes from persistently infected U.S. beef calves with complete genome sequence.

Bovine viral diarrhea virus (BVDV) is classified into 2 genotypes, BVDV-1 and BVDV-2, each of which contains distinct subtypes with genetic and antigenic variation. To effectively control BVDV by vaccination, it is important to know which subtypes of the virus are circulating and how their prevalence is changing over time. Accordingly, the purpose of our study was to estimate the current prevalence and diversity of BVDV subtypes from persistently infected (PI) beef calves in the central United States.

Full-length coding sequences for 12 bovine viral diarrhea virus isolates from persistently infected cattle in a feedyard in kansas.

We report here the full-length coding sequences of 12 bovine viral diarrhea virus (BVDV) isolates from persistently infected cattle in a feedyard in southwest KS. These 12 genomes represent the three major subtypes of BVDV (BVDV-1a, 1b, and 2a) currently circulating in the United States.

Acute bovine viral diarrhea associated with extensive mucosal lesions, high morbidity, and mortality in a commercial feedlot.

In 2008, a northwest Texas feedlot underwent an outbreak of Bovine viral diarrhea virus (BVDV) causing high morbidity and mortality involving 2 lots of calves (lots A and B). Severe mucosal surface lesions were observed grossly in the oral cavity, larynx, and esophagus. Mucosal lesions varied from small (1-3 mm) infrequent mucosal ulcerations to large (5 mm to 1 cm) and coalescing ulcerations.

Evaluation of economic effects and the health and performance of the general cattle population after exposure to cattle persistently infected with bovine viral diarrhea virus in a starter feedlot.

Objective: To evaluate economic effects and health and performance of the general cattle population after exposure to cattle persistently infected (PI) with bovine viral diarrhea virus (BVDV) in a feedlot.

Animals: 21,743 high-risk calves from the southeastern United States.

Procedures: PI status was determined by use of an antigen-capture ELISA (ACE) and confirmed by use of a second ACE, reverse transcriptase-PCR assay of sera, immunohistochemical analysis, and virus isolation from sera.