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Tuberculosis in cattle: the results of the four-area project.

Griffin JM, More SJ, Clegg TA, Collins JD, O'Boyle I, Williams DH, Kelly GE, Costello E, Sleeman DP, O'Shea F, Duggan M, Murphy J, Lavin DP - Ir Vet J (2005)

Bottom Line: These empirical findings were consistent with the hazard ratios found by Griffin et al. 13.The validity of the four-area project was discussed in detail.Efforts to minimise badger-to-cattle transmission in Ireland must be undertaken in association with the current comprehensive control programme, which has effectively minimised opportunities for cattle-to-cattle transmission.

View Article: PubMed Central - HTML - PubMed

Affiliation: Centre for Veterinary Epidemiology and Risk Analysis, UCD Veterinary Sciences Centre, UCD and School of Agriculture, Food Science and Veterinary Medicine, College of Life Sciences, University College Dublin, Belfield, Dublin 4, Ireland. simon.more@ucd.ie.

ABSTRACT
: The four-area project was undertaken to further assess the impact of badger removal on the control of tuberculosis in cattle herds in Ireland. It was conducted between 1997 and 2002 in matched removal and reference areas in four counties, namely Cork, Donegal, Kilkenny and Monaghan, representing a wide range of Irish farming environments. In the removal areas, a proactive programme of badger removal was conducted, on two or three occasions each year, whereas in the reference areas, badger removal was entirely reactive following severe outbreaks of tuberculosis amongst cattle. A detailed statistical analysis of this study has already been presented by Griffin et al. 13; this paper presents further, mainly descriptive, findings from the study. In total, 2,360 badgers were captured in the removal areas of which 450 (19.5%) were considered positive for tuberculosis and 258 badgers were captured in the reference areas, with 57 (26.1%) positive for tuberculosis. The annual incidence of confirmed herd restrictions was lower in the removal area compared to the reference area in every year of the study period in each of the four counties. These empirical findings were consistent with the hazard ratios found by Griffin et al. 13. Further, the effect of proactive badger removal on cattle tuberculosis in the four-area project and in the earlier east-Offaly project, as measured using the number of reactors per 1,000 cattle tested, were very similar, providing compelling evidence of the role of badgers in the epidemiology of tuberculosis in Irish cattle herds. The validity of the four-area project was discussed in detail. Efforts to minimise badger-to-cattle transmission in Ireland must be undertaken in association with the current comprehensive control programme, which has effectively minimised opportunities for cattle-to-cattle transmission.

No MeSH data available.


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Average annual confirmed restriction risk (CRR) in the removal and reference areas, and nationally, prior to the study period (September 1, 1992 to August 31, 1997) and during the study period (September 1, 1997 to August 31, 2000; September 1, 2000 to August 31, 2002).
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Figure 1: Average annual confirmed restriction risk (CRR) in the removal and reference areas, and nationally, prior to the study period (September 1, 1992 to August 31, 1997) and during the study period (September 1, 1997 to August 31, 2000; September 1, 2000 to August 31, 2002).

Mentions: During both the pre-study and the study period, 1,736 and 1,544 cattle herds were tested at least once in the removal and reference areas, respectively. During the five-year pre-study period, the average annual CRR in the removal areas varied from 3.8 (per 100 herds per year; Donegal) to 11.3 (Cork), and in the reference areas from 1.7 (Donegal) to 9.1 (Monaghan). The average annual CRR (Figure 1) in the removal areas compared with the reference areas were: in Cork (11.3 vs. 8.2; ratio = 1.4), Donegal (3.8 vs. 1.7; ratio = 2.2), Kilkenny (7.5 vs. 7.8; ratio = 1.0) and Monaghan (7.2 vs. 8.9; ratio = 0.8).


Tuberculosis in cattle: the results of the four-area project.

Griffin JM, More SJ, Clegg TA, Collins JD, O'Boyle I, Williams DH, Kelly GE, Costello E, Sleeman DP, O'Shea F, Duggan M, Murphy J, Lavin DP - Ir Vet J (2005)

Average annual confirmed restriction risk (CRR) in the removal and reference areas, and nationally, prior to the study period (September 1, 1992 to August 31, 1997) and during the study period (September 1, 1997 to August 31, 2000; September 1, 2000 to August 31, 2002).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3113914&req=5

Figure 1: Average annual confirmed restriction risk (CRR) in the removal and reference areas, and nationally, prior to the study period (September 1, 1992 to August 31, 1997) and during the study period (September 1, 1997 to August 31, 2000; September 1, 2000 to August 31, 2002).
Mentions: During both the pre-study and the study period, 1,736 and 1,544 cattle herds were tested at least once in the removal and reference areas, respectively. During the five-year pre-study period, the average annual CRR in the removal areas varied from 3.8 (per 100 herds per year; Donegal) to 11.3 (Cork), and in the reference areas from 1.7 (Donegal) to 9.1 (Monaghan). The average annual CRR (Figure 1) in the removal areas compared with the reference areas were: in Cork (11.3 vs. 8.2; ratio = 1.4), Donegal (3.8 vs. 1.7; ratio = 2.2), Kilkenny (7.5 vs. 7.8; ratio = 1.0) and Monaghan (7.2 vs. 8.9; ratio = 0.8).

Bottom Line: These empirical findings were consistent with the hazard ratios found by Griffin et al. 13.The validity of the four-area project was discussed in detail.Efforts to minimise badger-to-cattle transmission in Ireland must be undertaken in association with the current comprehensive control programme, which has effectively minimised opportunities for cattle-to-cattle transmission.

View Article: PubMed Central - HTML - PubMed

Affiliation: Centre for Veterinary Epidemiology and Risk Analysis, UCD Veterinary Sciences Centre, UCD and School of Agriculture, Food Science and Veterinary Medicine, College of Life Sciences, University College Dublin, Belfield, Dublin 4, Ireland. simon.more@ucd.ie.

ABSTRACT
: The four-area project was undertaken to further assess the impact of badger removal on the control of tuberculosis in cattle herds in Ireland. It was conducted between 1997 and 2002 in matched removal and reference areas in four counties, namely Cork, Donegal, Kilkenny and Monaghan, representing a wide range of Irish farming environments. In the removal areas, a proactive programme of badger removal was conducted, on two or three occasions each year, whereas in the reference areas, badger removal was entirely reactive following severe outbreaks of tuberculosis amongst cattle. A detailed statistical analysis of this study has already been presented by Griffin et al. 13; this paper presents further, mainly descriptive, findings from the study. In total, 2,360 badgers were captured in the removal areas of which 450 (19.5%) were considered positive for tuberculosis and 258 badgers were captured in the reference areas, with 57 (26.1%) positive for tuberculosis. The annual incidence of confirmed herd restrictions was lower in the removal area compared to the reference area in every year of the study period in each of the four counties. These empirical findings were consistent with the hazard ratios found by Griffin et al. 13. Further, the effect of proactive badger removal on cattle tuberculosis in the four-area project and in the earlier east-Offaly project, as measured using the number of reactors per 1,000 cattle tested, were very similar, providing compelling evidence of the role of badgers in the epidemiology of tuberculosis in Irish cattle herds. The validity of the four-area project was discussed in detail. Efforts to minimise badger-to-cattle transmission in Ireland must be undertaken in association with the current comprehensive control programme, which has effectively minimised opportunities for cattle-to-cattle transmission.

No MeSH data available.


Related in: MedlinePlus