scholarly journals A model of bovine tuberculosis control in domesticated cattle herds

1997 ◽  
Vol 264 (1384) ◽  
pp. 1069-1076 ◽  
Author(s):  
R. R. Kao ◽  
M. G. Roberts ◽  
T. J. Ryan
Keyword(s):  
Bovine Tuberculosis ◽  
Tuberculosis Control ◽  
Cattle Herds

A simulation model for the spread of bovine tuberculosis within New Zealand cattle herds

1997 ◽  
Vol 32 (1-2) ◽  
pp. 57-75 ◽  
Author(s):  
N.D. Barlow ◽  
J.M. Kean ◽  
G. Hickling ◽  
P.G. Livingstone ◽  
A.B. Robson
Keyword(s):  
New Zealand ◽  
Simulation Model ◽  
Bovine Tuberculosis ◽  
Cattle Herds

scholarly journals Future Risk of Bovine Tuberculosis (Mycobacterium bovis) Breakdown in Cattle Herds 2013–2018: A Dominance Analysis Approach

2021 ◽  
Vol 9 (5) ◽  
pp. 1004
Author(s):  
Andrew W. Byrne ◽  
Damien Barrett ◽  
Philip Breslin ◽  
Jamie M. Madden ◽  
James O’Keeffe ◽  
...  
Keyword(s):  
Bovine Tuberculosis ◽  
Policy Development ◽  
Strong Predictor ◽  
Herd Size ◽  
Analysis Approach ◽  
Dominance Analysis ◽  
Control Programmes ◽  
Significant Spatial Variation ◽  
Future Risk ◽  
Cattle Herds

Bovine tuberculosis (bTB) remains a significant endemic pathogen of cattle herds, despite multi-decadal control programmes being in place in several countries. Understanding the risks of future bTB breakdown (BD) and the associated characteristics of herds and index breakdowns could help inform risk categorisation. Such risk categories could then contribute to tailored management and policies. Here, we estimated the future risk of herd BD for the cohort of herds that were derestricted during 2013 in Ireland using multivariable logit regression models, with a dominance analysis approach. One third of herds that were derestricted in 2013 experienced a breakdown during the follow-up five year period (1469/4459; 33%). BD length was a significant predictor of future risk, primarily driven by long BDs > 230 days relative to short BDs < 130 days (OR 95%CI: 1.157–1.851), as was having had a previous BD (OR 95%CI: 1.012–1.366). Herd-size was the dominant predictor of future risk (accounted for 46% of predicted variance), suggesting significant increase in risk of future breakdown with increasing (log) herd-size (OR 95%CI: 1.378–1.609). There was significant spatial variation in future risk across counties, and it was the second most dominant predictor of future risk (25% of predicted variance). The size of index breakdowns was not a strong predictor of future risk over a 5-year period. These findings can inform a risk-based policy development.

scholarly journals Bovine tuberculosis and its risk factors among dairy cattle herds in and around Bahir Dar City, Northwest Ethiopia

2015 ◽  
Vol 19 (2) ◽  
pp. 27 ◽  
Author(s):  
Anwar Nuru ◽  
Gezahegne Mamo ◽  
Leakemariam Teshome ◽  
Aboma Zewdie ◽  
Girmay Medhin ◽  
...  
Keyword(s):  
Risk Factors ◽  
Dairy Cattle ◽  
Bovine Tuberculosis ◽  
Northwest Ethiopia ◽  
Bahir Dar ◽  
Cattle Herds

scholarly journals Economic Losses’ Estimation of carcass and Organ Condemnations From Slaughter Cattle in Thailand, Pará State, Brazilian Amazon

2019 ◽  
Vol 7 (2) ◽  
pp. 75
Author(s):  
Gerlane Nunes Noronha ◽  
Marcos Antônio Souza dos Santos ◽  
Washington Luiz Assunção Pereira ◽  
Alexandre Do Rosário Casseb ◽  
Andréia Santana Bezerra ◽  
...  
Keyword(s):  
Disease Control ◽  
Bovine Tuberculosis ◽  
Economic Loss ◽  
Brazilian Amazon ◽  
Economic Losses ◽  
National Program ◽  
Tuberculosis Control ◽  
Slaughter Cattle ◽  
Control And Eradication

The article identifies the main pathologies found and estimates the economic losses generated in a slaughterhouse in the Thailand municipality, Pará, during the period from March 2010 to October 2014. 55,169 animals were slaughtered, with total economic losses of R$ 1,221,035.90 and ischemia was the most frequent lesion (41.86%). The most frequent condemnation organs were lungs (48.75%), kidneys (41.66%) and liver (3.61%), which produced economic loss of R$ 76,405.65 (6.26%). Tuberculosis was the main cause of carcass condemnation, responsible for R$ 872,783.64 of economic losses. The bovine tuberculosis control can begin in production, with examinations on the farm to slaughter lines, with careful carcass inspection, as advocated by the National Program for the Control and Eradication of Animal Brucellosis and Tuberculosis (PNCEBT), which increases disease control and minimizes condemnations and economic losses at slaughter.

scholarly journals Assessment of the specificity of a gamma-interferon test performed with specific antigens to detect bovine tuberculosis, after non-negative results to intradermal tuberculin testing

2019 ◽  
Vol 6 (1) ◽  
pp. e000335 ◽  
Author(s):  
Anne Praud ◽  
Clémence Bourély ◽  
Maria-Laura Boschiroli ◽  
Barbara Dufour
Keyword(s):  
Bovine Tuberculosis ◽  
Gamma Interferon ◽  
Skin Tests ◽  
Negative Results ◽  
In Series ◽  
Specific Antigens ◽  
Ifn Γ ◽  
Tuberculin Testing ◽  
Cattle Herds ◽  
Higher Sensitivity

In cattle herds in France, cervical skin tests (STs) using simple intradermal tuberculin (SIT) are performed to detect bovine tuberculosis (bTB). When positive results are found on ST screening, the herd is considered to be ‘under suspicion’ and confined, raising economic issues. The suspicion can be lifted by carrying out a single intradermal cervical comparative test (SICCT) at least six weeks later.The authors conducted an experimental study in France between 2013 and 2015 to assess the accuracy of the gamma-interferon test (IFN-γ), used in series after a non-negative result to ST screening, and to study the possibility of replacing the SICCT performed six weeks later by an IFN performed within a few days. Data were collected concerning 40 infected and 1825 bTB-free animals from herds with non-negative results to ST screening. This study showed that the IFN-γ test based on specific antigens and performed within a few days of a non-negative result to the ST has higher sensitivity than the SICCT performed six weeks later and equal specificity. The IFN test is more convenient to perform; however, it is more expensive. The IFN-γ test based on MIX antigens may be a useful alternative to the SICCT, to shorten the confinement period of suspect herds without underdetecting bTB.

Herd-level risk factors for bovine tuberculosis in French cattle herds

2016 ◽  
Vol 131 ◽  
pp. 31-40 ◽  
Author(s):  
Maud Marsot ◽  
Marina Béral ◽  
Axelle Scoizec ◽  
Yoann Mathevon ◽  
Benoit Durand ◽  
...  
Keyword(s):  
Risk Factors ◽  
Bovine Tuberculosis ◽  
Herd Level ◽  
Cattle Herds
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