Experimental induction of mucosal disease: consequences of superinfection of persistently infected cattle with different strains of cytopathogenic bovine viral diarrhea virus

1998 ◽  
Vol 143 (4) ◽  
pp. 667-679 ◽  
Author(s):  
B. I. Loehr ◽  
H.-R. Frey ◽  
V. Moennig ◽  
I. Greiser-Wilke
2013 ◽  
Vol 36 (2) ◽  
pp. 105-110 ◽  
Author(s):  
Jong-Suk Cho ◽  
Gyung-Dong Kim ◽  
Hong-Je Park ◽  
Yeoun-Su Lim ◽  
Sung-Hee Hong ◽  
...  

2007 ◽  
Vol 19 (5) ◽  
pp. 545-548 ◽  
Author(s):  
Charles C. Broaddus ◽  
G. Reed Holyoak ◽  
Lionel Dawson ◽  
D. L. Step ◽  
Rebecca A. Funk ◽  
...  

The transmission of bovine viral diarrhea virus (BVDV) from persistently infected (PI) heifers to adult seronegative goats was examined in this study. Ten seronegative adult goats were exposed to 4 PI heifers. None of the goats developed any clinical signs but all goats seroconverted by 42 days after exposure to the PI cattle. Results indicate that goats are susceptible to BVDV infection when housed with PI cattle.


2009 ◽  
Vol 46 (1) ◽  
pp. 45-53 ◽  
Author(s):  
C. C. Broaddus ◽  
C. G. Lamm ◽  
S. Kapil ◽  
L. Dawson ◽  
G. R. Holyoak

2018 ◽  
Vol 30 (3) ◽  
pp. 413-422 ◽  
Author(s):  
Lalitha Peddireddi ◽  
Kelly A. Foster ◽  
Elizabeth G. Poulsen ◽  
Baoyan An ◽  
Quoc Hung Hoang ◽  
...  

Fifty-three cattle of unknown serologic status that were not persistently infected (PI) with bovine viral diarrhea virus (BVDV) were commingled with 10 cattle that were PI with different strains of BVDV, and were monitored for an extended commingle period using a reverse-transcription real-time PCR (RT-rtPCR) BVDV assay on various sample types. Transient infections with BVDV were also assessed by virus isolation, virus neutralization (VN) assays, and direct buffy coat 5′-UTR sequencing. Infections were demonstrated in all cattle by RT-rtPCR; however, the detection rate was dependent on the type of sample. Buffy coat samples demonstrated a significantly greater number of positive results ( p ≤ 0.05) than either serum or nasal swab samples. Presence of elevated BVDV VN titers at the onset inversely correlated with the number of test days positive that an individual would be identified by RT-rtPCR from buffy coat samples, and directly correlated with the average Ct values accumulated over all RT-rtPCR test days from buffy coat samples. Both single and mixed genotype/subgenotype/strain infections were detected in individual cattle by direct sample 5′-UTR sequencing. A BVDV-2a strain from a PI animal was found to be the predominant strain infecting 64% of all non-PI cattle; BVDV-1b strains originating from 3 PI cattle were never detected in non-PI cattle. Although direct sample 5′-UTR sequencing was capable of demonstrating mixed BVDV infections, identifying all strains suspected was not always efficient or possible.


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