Case study: The coastal based approach

The coastal based approach: Natasha Bradshaw, Bob Earll, Peter Barham, Amy Pryor and Mark Everard analyse a way of enabling systematic collaboration and integrated delivery of environmental outcomes in the coastal zones

Improving first-time donor attendance rates through the use of enhanced donor preparation materials

BACKGROUND Many nondonors are positive about blood donation and this motivates booking an appointment to donate. However, as their appointment approaches barriers to donating - such as anxiety - may become salient and deter attendance. Building on research of France and colleagues demonstrating the positive effect of enhanced preparation materials on donor recruitment, this study sought to determine whether these materials could effectively boost first donation appointment attendance. STUDY DESIGN AND METHODS A field study comprising a 3 (brochure: none, e-mail, hard copy) × 2 (national call center [NCC] contact: none, call) between-subjects design was conducted with 3646 nondonors who had scheduled their first appointment. Participants in the brochure conditions received either a hard copy or an e-mailed link to electronic materials modeled on the donor preparation research of France and colleagues. Participants in the NCC call condition also received a call scripted in line with these preparation materials. The key outcome was new donor attendance rate. RESULTS Although first-appointment attendance rates were high in the control (no additional contact) condition at 85.07% of those not canceling in advance, dual exposure to the preparation materials through a NCC call and an electronic brochure boosted attendance. The relative risk of attending in the NCC call and electronic brochure condition was 1.0836 (95% confidence interval, 1.0352-1.1343; p = 0.0006), with attendance 8.36% higher than in the control. This gain in attendance came at a relative increase in recruitment costs of 2%. CONCLUSION The use of tailored communication to address new donors' concerns and prepare them for donating bolsters attendance rates

Acquired immunity protects against helminth infection in a natural host population: long-term field and laboratory evidence

Long-term records of parasite infection are rare for individuals in wild host populations. This study, on an introduced population of Xenopus laevis in Wales, demonstrates powerful control by acquired immunity of the monogenean, Protopolystoma xenopodis. Field evidence was based on a 10 year dataset for 619 individually-marked hosts screened at each capture for patent (egg-producing) infection. The adult parasite population occurred predominantly in juvenile hosts. Invasion began rapidly ‘post-birth' (in early tadpoles). Longitudinal records for animals aged ⩾15 years showed that, after loss of this primary infection, most hosts had strong resistance to re-infection. For ca. 80% of the population, no infections were recorded during adult life; for ca. 15%, there were isolated brief episodes of patent infection; for ca. 5%, parasites persisted as repeated short-term or chronic long-term infections. Acquired immunity was confirmed by laboratory challenge infection of wild-caught X. laevis: in 30/32 exposures, no parasites survived to maturity; in the two infected, development was retarded. Parasite persistence depends principally on host recruitment generating naïve young (as in human measles). In some hosts, retarded parasite development delays reproduction for several years: these infections show ‘Typhoid Mary' characteristics, persisting in ‘latent' form with potential to initiate epidemics in naïve cohorts