Effects of exposure to calves persistently infected with bovine viral diarrhea virus type 1b and Mannheimia haemolytica challenge on animal performance, nitrogen balance, and visceral organ mass in beef steers1,2

2010 ◽  
Vol 88 (6) ◽  
pp. 2179-2188 ◽  
Author(s):  
L. O. Burciaga-Robles ◽  
C. R. Krehbiel ◽  
D. L. Step ◽  
B. P. Holland ◽  
C. J. Richards ◽  
...  
Keyword(s):  
Virus Type ◽  
Bovine Viral Diarrhea Virus ◽  
Nitrogen Balance ◽  
Bovine Viral Diarrhea ◽  
Visceral Organ ◽  
Persistently Infected ◽  
Diarrhea Virus ◽  
Viral Diarrhea ◽  
Organ Mass ◽  
Viral Diarrhea Virus

scholarly journals An Assessment of Secondary Clinical Disease, Milk Production and Quality, and the Impact on Reproduction in Holstein Heifers and Cows from a Single Large Commercial Herd Persistently Infected with Bovine Viral Diarrhea Virus Type 2

Viruses ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 760 ◽  
Author(s):  
Natália Sobreira Basqueira ◽  
Jean Silva Ramos ◽  
Fabricio Dias Torres ◽  
Liria Hiromi Okuda ◽  
David John Hurley ◽  
...  
Keyword(s):  
Milk Production ◽  
Virus Type ◽  
Reproductive Performance ◽  
Bovine Viral Diarrhea Virus ◽  
Bovine Viral Diarrhea ◽  
Persistently Infected ◽  
Diarrhea Virus ◽  
Viral Diarrhea ◽  
Viral Diarrhea Virus

The aim of this study was to evaluate secondary clinical disease, milk production efficiency and reproductive performance of heifers and cows persistently infected (PI) with bovine viral diarrhea virus type 2 (BVDV type 2). PI animals (n = 25) were identified using an antigen capture ELISA of ear notch samples. They were distributed into three age groups: ≤ 12 (n = 8), 13 to 24 (n = 6) and 25 to 34 (n = 11) months old. A control group of BVDV antigen ELISA negative female cattle that were age matched to the PI animals was utilized from the same herd. The PI group had a 1.29 higher odds ratio for diarrhea than controls (p = 0.001, IC95% = 1.032–1.623) and 1.615 greater chance of developing bovine respiratory disease (BRD) (p = 0.012, IC95% = 1.155–2.259). The age at first insemination (p = 0.012) and number of insemination attempts required to establish the first pregnancy (p = 0.016) were both higher for PI than controls. Milk production was higher for control cows than PI cows during most of the sampling periods. Somatic cell counts (SCC) were higher in PI cows than the controls at all sampling points across lactation (p ≤ 0.042). PI cattle had a higher incidence of disease, produced less milk, a higher SCC, and poorer reproductive performance than control cattle in this study.

scholarly journals Phylogenetic analysis of Brazilian bovine viral diarrhea virus type 2 (BVDV-2) isolates: evidence for a subgenotype within BVDV-2

2002 ◽  
Vol 87 (1) ◽  
pp. 51-60 ◽  
Author(s):  
Eduardo F Flores ◽  
Julia F Ridpath ◽  
Rudi Weiblen ◽  
Fernanda S.F Vogel ◽  
Laura H.V.G Gil
Keyword(s):  
Phylogenetic Analysis ◽  
Virus Type ◽  
Bovine Viral Diarrhea Virus ◽  
Bovine Viral Diarrhea ◽  
Diarrhea Virus ◽  
Viral Diarrhea ◽  
Viral Diarrhea Virus
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