Objective To determine whether dogs can be trained to identify people with bladder cancer on the basis of urine odour more successfully than would be expected by chance alone. Design Experimental, "proof of principle" study in which six dogs were trained to discriminate between urine from patients with bladder cancer and urine from diseased and healthy controls and then evaluated in tests requiring the selection of one bladder cancer urine sample from six controls. Participants 36 male and female patients (age range 48-90 years) presenting with new or recurrent transitional cell carcinoma of the bladder (27 samples used for training; 9 used for formal testing); 108 male and female controls (diseased and healthy, age range 18-85 years-54 samples used in training; 54 used for testing). Main outcome measure Mean proportion of successes per dog achieved during evaluation, compared with an expected value of 1 in 7 (14%). Results Taken as a group, the dogs correctly selected urine from patients with bladder cancer on 22 out of 54 occasions. This gave a mean success rate of 41% (95% confidence intervals 23% to 58% under assumptions of normality, 26% to 52% using bootstrap methods), compared with 14% expected by chance alone. Multivariate analysis suggested that the dogs' capacity to recognise a characteristic bladder cancer odour was independent of other chemical aspects of the urine detectable by urinalysis. Conclusions Dogs can be trained to distinguish patients with bladder cancer on the basis of urine odour more successfully than would be expected by chance alone. This suggests that tumour related volatile compounds are present in urine, imparting a characteristic odour signature distinct from those associated with secondary effects of the tumour, such as bleeding, inflammation, and infection.

These data suggest that a combination of L. sericata ES proteinases involving chymotrypsin-like and trypsin-like activities could potentially influence wound healing events when maggots are introduced into necrotic and infected wounds, with the chymotrypsin-like activity involved in the remodelling of ECM components.

Every couple of decades governments decide that they need to involve citizens more in public decision-making processes. The significant changes that have occurred over the past decade, including a growing loss of faith in the traditional institutions of government, have once again prompted political decision-makers to explore options for enhanced citizen participation. In the health care sector, reforms occurring during the 1990s were couched in terms such as "enhanced responsiveness," "improved accountability," and "increased citizen participation." In the new millennium, governments and regional health authorities have been relatively silent on this issue. As has been the case in the past, a wide range of opinions exist about what citizen participation is and how governments should proceed. Without either conceptual clarity or practical direction, governments have been slow to articulate what they hope to achieve or how they intend to get there. The purpose of this paper is to examine the concept of citizen participation within the context of a series of basic questions from which decision-makers might draw some policy relevance. Rather than taking a particular disciplinary perspective (i.e. health promotion), the authors have chosen to review a broad spectrum of existing literature to provide a better understanding of what is known about citizen participation, both good and bad. As such, the paper is meant to be a point of departure for an informed discussion of the possibilities for improved citizen participation in health (care) decision-making.

The use of maggots for wound debridement has a long history and has lately gained ground in several countries. We collected prospective data to examine the current use of larva therapy (LT) in the UK. Quantitative information was collected on 70 patients treated in nine hospitals. LT is used primarily to treat leg ulcers and generally involves three applications of larvae at two to three day intervals. This method is judged effective in wound debridement and promotes the growth of granulation tissue. Wound exudate, odour, infection and pain are all reduced by the treatment. Adverse reactions are infrequent but include pain, bleeding, pyrexia and influenza-like symptoms. Prevention of hospital admission and surgery, reduced need for antibiotics and reduced hospital stay are all identified as outcomes of LT. The nurse practitioners who used LT believed it to have an important role in wound management. A randomized clinical trial, comparing LT with other debriding agents, is required for evaluation of cost effectiveness.

Since the introduction of universal health insurance in Canada in the late 1960s, the federal and provincial governments have been concerned with cost savings, efficiency of service delivery, equity in service provision, enhanced citizen participation, and increased accountability of decision-makers. A plethora of government royal commissions and task forces have recommended a similar range of options for addressing these concerns. Central to the reforms has been a proposed regionalized health system with an intermediary body responsible for functions previously assigned to local or central structures. For its supporters, regionalization offers a means of better coordinating and integrating health care delivery and controlling expenditures, and promises a more effective provision of services and an avenue for citizen participation in health care decision-making. All provincial governments except Ontario have introduced regional structures for health care, with the hope that these changes will increase efficiency, equity, and responsiveness. However, despite the alleged benefits, regionalization presents significant challenges. It faces obstacles to integrating and coordinating services in a manner that produces economies of scale; it requires an enhanced level of information that may be difficult to achieve; it is unlikely to involve citizens in health care decision-making; and it may actually lead to increased costs.

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