scholarly journals Corrigendum to “Annual rhythms of milk synthesis in dairy herds in 4 regions of the United States and their relationships to environmental indicators” (J. Dairy Sci. 103:3696–3707)

2020 ◽  
Vol 103 (6) ◽  
pp. 5791
Author(s):  
I.J. Salfer ◽  
P.A. Bartell ◽  
C.D. Dechow ◽  
K.J. Harvatine
2017 ◽  
Vol 29 (5) ◽  
pp. 704-706 ◽  
Author(s):  
Fernando V. Bauermann ◽  
Julia F. Ridpath ◽  
David A. Dargatz

Infection with bovine leukemia virus (BLV) results in economic loss because of reduced productivity, especially reduced milk production, and early culling. In the United States, studies in 1996, 1999, and 2007 showed BLV infection to be widespread, especially in dairy herds. We updated information herein on BLV seroprevalence in the United States, using samples submitted for testing and found negative for antibodies for Brucella by the Kentucky Eastern Regional Federal Brucellosis Laboratory. From October 2014 through August 2015, 2,000 samples from all regions of the contiguous United States were selected and tested for BLV antibodies by enzyme-linked immunosorbent assay. The overall percentage of samples positive for BLV antibody was 38.6%. Based on the animal’s origin, the percent positive by region ranged from 32.5% (Mountain West region) to 54.3% (Northeast region; p < 0.05). The positive rate for slaughter plants that processed mainly dairy animals (dairy plants; 47.6%) was higher than the positive rate at slaughter plants that processed mainly beef animals (beef plants; 33.6%; p < 0.05). The results suggest that BLV infection remains widespread in all regions of the United States and that rates may differ between beef and dairy cattle.


1979 ◽  
Vol 42 (5) ◽  
pp. 448-450
Author(s):  
FRANCIS J. DRAZEK

Brucellosis continues to be a very devastating disease in the United States and throughout the world. In dairy herds, spread of the disease often results in severe milk losses due to the necessary slaughter of infected animals. Many herds have been depopulated because herd owners have not followed management recommendations to control the spread of infection. Undulant fever is a frequent occurrence in farm families where herds are infected. Increased movement of cattle, including importation of animals, has contributed to its spread. Prevention, control, and eradication have been impeded by present housing and management practices. The general apathy on the part of the owner in not having herd additions blood-tested for brucellosis before entry into the herd is also an important contributing factor.


2004 ◽  
Vol 64 (4) ◽  
pp. 929-963 ◽  
Author(s):  
ALAN L. OLMSTEAD ◽  
PAUL W. RHODE

In 1900 bovine tuberculosis was a serious and growing threat to animal and human health. Early private and state initiatives in the United States often increased the incentives for the interstate trade of diseased stock. One unscrupulous dealer exposed thousands of dairy herds and families to the disease. Our study helps explain the expanding federal role in regulating food safety. In this case regulations arose from genuine health concerns. Before the development of strict regulations, diagnostic innovations that could have helped prevent the spread of the disease actually made the operation of markets worse by aggravating asymmetric information problems.


2011 ◽  
Vol 94 (12) ◽  
pp. 6243-6256 ◽  
Author(s):  
H.D. Norman ◽  
J.E. Lombard ◽  
J.R. Wright ◽  
C.A. Kopral ◽  
J.M. Rodriguez ◽  
...  

2020 ◽  
Vol 103 (9) ◽  
pp. 8161-8173
Author(s):  
Fernanda C. Ferreira ◽  
John S. Clay ◽  
Albert De Vries

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