Summary 1.Restoration of high plant species diversity to sites where it has been reduced by intensive grassland management requires identification of appropriate management regimes. Understanding the combinatorial effects of management on above-ground vegetation and below-ground microbial communities will inform management prescriptions on how best to increase plant diversity, restore rare vegetation types and achieve agri-environmental objectives. 2. Changes in vegetation and soil microbial community structure are described from the second phase of a 1990-2004 field trial that investigated the interacting effects of fertilizer and farmyard manure (FYM) treatments imposed after 1998, in the context of previous hay-cut date and seedaddition treatments. 3. Hay-cut date was the main factor influencing plant species composition in phase 1, whereas FYM was the dominant factor in phase 2. 4. Poa trivialis and Lolium perenne increased in abundance with FYM application, particularly in combination with mineral fertilizer, and particularly in 2002 after the 2001 foot and mouth epidemic. The lowest Ellenberg fertility scores were associated with absence of FYM and mineral fertilizer but with addition of seed. 5. The highest plant species diversity in phase 2 was associated with seed addition and the absence of mineral fertilizer, an effect that had probably persisted from phase 1. Progressive development of the target traditional meadow vegetation occurred through phase 2. 6. Fungal:bacterial (F:B) ratios, a measure of changes in the relative abundance of fungi and bacteria in the microbial community, generally increased from 1996 to 2004, and were particularly high in the seed-addition treatments and in the absence of fertilizer. Here the high F:B ratios were associated with species (including legumes) typical of traditionally managed mesotrophic grassland in northern England. 7. Synthesis and applications. These results demonstrate that biodiversity goals for upland meadows need to plan beyond the typical 5-10-year management agreement period of agri-environment schemes. Combination treatments, in which seed addition is vital, alongside appropriate fertilizer, FYM, hay-cut date and grazing regimes, are needed for grassland restoration. However, even after 14 years the most effective treatment combinations had still not restored the target species composition and diversity. The demonstrated change in soil microbial communities, linked to the growth of legumes, might be important to facilitate future increases in plant diversity.

BACKGROUND. The change towards a more Westernised diet in Libya may increase the risk of caries and erosion in children. AIMS. To investigate any association between dental caries, dental erosion, and potential dietary risk factors in Libyan schoolchildren. METHODS. A random sample of 791 schoolchildren aged 12 years underwent dental examination for caries and erosion and completed a questionnaire to provide dietary data. Dental caries was assessed using the WHO (Oral Health Surveys: Basic Methods, 1997) criteria. Erosion was assessed using UK National Diet and Nutrition Survey (NDNS, Young People Aged 4-18 years. Volume 2: Report of the Oral Health Survey, 2000) criteria. Associations between caries and dietary variables were investigated through bivariate and multivariate analyses. RESULTS. Of the 791 12-year olds, 57.8% (457) had caries experience and 40.8% (323) had experience of erosion. One hundred and ninety-two subjects (42%) of the subjects with caries experience also had erosion, whilst 131 subjects (39.2%) of the 334 without caries had clinical signs of erosion (P = 0.464; OR, 1.123; 95% CI, 0.842, 1.497). There was no statistically significantly relationship between dental caries and dental erosion. Frequency of consumption of fruit-based sugared drinks was statistically significantly positively associated with experience of caries (P = 0.002). CONCLUSIONS. Dental caries experience was associated with frequency of consumption of sugared dietary items but not with dental erosion.

In this group of Libyan 12-year-olds, frequency of consumption of fruit-based sugary drinks and length of time taken to consume acidic drinks were the primary statistically significant positive risk factors for dental erosion.

Objectives The UK National Health Service Bowel Cancer Screening Programme (BCSP) is based on a strategy of biennial faecal occult blood (FOB) testing. Positive results are classified as ‘abnormal’ or ‘weak positive’ based on the number of positive windows per kit or need for repeat testing. Colonoscopy is offered to both groups. We evaluate the relationship between FOB test positivity and clinical outcome in the BCSP. Setting The South of Tyne and Tees (UK) Bowel Cancer Screening Centres. Methods Data were collected prospectively on all individuals who were offered FOB testing and colonoscopy between February 2007 and February 2009. Univariable and multivariable analyses were performed to investigate the relationship between FOB test positivity and clinical outcome. Results Following FOB testing, 1524 individuals underwent colonoscopy, 1259 (83%) after a ‘weak positive’ and 265 (17%) an ‘abnormal’ result. Cancer was detected in 180 (11.8%) and adenomas in 758 (49.7%). Individuals with an ‘abnormal’ result were more likely to have cancer or be ‘high risk’ for the development of future adenomas (110/265, 41.5%) than those with ‘weak positive’ results, (236/1259, 18.7%, P < 0.0001). Those with Dukes stage B, C or D cancers or cancers proximal to the splenic flexure were more likely to have an ‘abnormal’ result. Conclusions The majority of colonoscopies were performed following ‘weak positive’ FOB results. Those with an ‘abnormal’ result were more likely to be diagnosed with cancer. The high yield of pathology in both the ‘abnormal’ and ‘weak positive’ groups justifies the need for colonoscopy in both.

The local refining of crude oil has become a lucrative but disturbing business in the Niger Delta region of Nigeria. Deep inside the forest of the Niger Delta camps are built and used for the local refining of crude oil. The economic benefits this brings to the refiners are clear, however the host communities are severely hit by the activities of the 'local crude oil refiners'. Farmlands have been destroyed and fishing settlements evacuated as a result of pollution of the rivers and estuaries, with loss of lives and properties. This research investigates the impact of the activities of the local refiners on their host communities' farmlands, rivers and estuaries. A quantitative research method was adopted in this study through the administration of questionnaires to local stakeholders (chiefs, the youth, farmers, traders, fishermen/fisherwomen and residents of affected communities). Quantitative data was collected from three communities in the Niger Delta with local refineries and the data was analysed using descriptive and inferential (Chi Square and Correlation) methods. The study demonstrates the high impact of the activities of the refiners on farmlands and fishing areas of the host communities and makes recommendations to all stakeholders in the upstream and downstream sectors of the petroleum industry. In addition, recommendations are made to the Nigerian government, on ways to address the impact of local refining on host communities.