Cost-benefit analysis model of badger (Meles meles) culling to reduce cattle herd tuberculosis breakdowns in Britain, with particular reference to badger perturbation

Bovine tuberculosis (TB)is an important economic disease. Badgers (Meles meles) are the wildlife source implicated in many cattle outbreaks of TB in Britain, and extensive badger control is a controversial option to reduce the disease. A badger and cattle population model was developed, simulating TB epidemiology; badger ecology, including postcull social perturbation; and TB-related farm management. An economic cost-benefit module was integrated into the model to assess whether badger control offers economic benefits. Model results strongly indicate that although, if perturbation were restricted, extensive badger culling could reduce rates in cattle, overall an economic loss would be more likely than a benefit. Perturbation of the badger population was a key factor determining success or failure of control. The model highlighted some important knowledge gaps regarding both the spatial and temporal characteristics of perturbation that warrant further research.

Voices from the aid 'chain': The personal dynamics of care

This paper uses a simplified model of the aid 'chain' to explore some causes and consequences of breakdown in communication. Although the rhetoric of Northern-based donors is awash with words such as 'partnership' and 'inclusion' when dealing with their Southern-based partners, the situation in practice is different. Unequal power relationships sometimes result in donor imposition of Perspectives and values. It is our contention, based on a collective experience of fifty-four years in a Nigerian-based non-governmental development organization (NGDO), the Diocesan Development Services (DDS), that much of the driving force behind the successes and problems faced by the institution was founded on relationships that evolved between individuals. In order to understand why things happened the way they did it is necessary to begin with the human element that cannot be condensed into objects or categories. While injudicious donor interference bad damaging repercussions, our experience suggests that care and consideration flow throughout the aid chain and actions are not malevolent. Breakdowns can be attributed to a number of factors, with the over-riding one being pressures operating at the personal level that emanate from within the institution itself and the larger community. The paper analyses three experiences using institutional ethnography theory and methodologies as a basis. Examples taken address the influence key donor personnel had in the function of DDS, and how these changed with time. The mission, policies and even procedures of the donor did not change markedly over thirty-two years, but each changing desk officer had their own philosophy and approach and a different interpretation of their own institutional policies. Hence while the 'macro' has an influence it is mediated via individual interpretation. In our view, the importance of people-people relationships is particularly understated in development literature where emphasis gravitates towards the aggregate and global.

Costs to farmers of a tuberculosis breakdown

An on-farm survey of 151 cattle farmers who had experienced a bovine tuberculosis (Mycobacterium bovis) breakdown on their farms was undertaken in 2003 to assess the costs associated with the breakdown. In 90 per cent of cases the cost was estimated to be less than 18,513 pound for dairy herds and less than El 1,462 for beef herds, but with a range from 229 pound to 103,817 pound. The main cost was the slaughter of reactor cattle. For the majority of the farmers, the compensation payments seemed to meet most of the costs of their breakdowns, although a majority was still left with net losses.