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Introgression among parasite species has the potential to transfer traits of biomedical importance across species boundaries. The parasitic blood fluke Schistosoma haematobium causes urogenital schistosomiasis in humans across sub-Saharan Africa. Hybridization with other schistosome species is assumed to occur commonly, because genetic crosses between S. haematobium and livestock schistosomes, including S. bovis, can be staged in the laboratory, and sequencing of mtDNA and rDNA amplified from microscopic miracidia larvae frequently reveals markers from different species. However the frequency, direction, age and genomic consequences of hybridization are unknown. We hatched miracidia from eggs, and sequenced the exomes from 96 individual S. haematobium miracidia from infected patients from Niger and the Zanzibar archipelago. These data revealed no evidence for contemporary hybridization between S. bovis and S. haematobium in our samples. However, all Nigerien S. haematobium genomes sampled show hybrid ancestry, with 3.3-8.2% of their nuclear genomes derived from S. bovis, providing evidence of an ancient, introgression event that occurred at least 108-613 generations ago. Some S. bovis derived alleles have spread to high frequency or reached fixation and show strong signatures of directional selection; the strongest signal spans a single gene in the invadolysin gene family (Chr. 4). Our results suggest that S. bovis/S. haematobium hybridization occurs rarely, but demonstrate profound consequences of ancient introgression from a livestock parasite into the genome of S. haematobium, the most prevalent schistosome species infecting humans.

Background: Prevalence of cancer and dementia are strongly related to age. In the UK, 70% of care home residents have dementia. By 2040, older people (aged 65+) will account for 77% of all people living with cancer. Residents with only one of these conditions may have complex care needs. Having comorbid cancer and dementia (CCD) is likely to bring further challenges. This is the first research project to examine the care and support needs of people with CCD living in residential care homes and areas for improvement. Aims: To explore: (1) The care and support needs of people with CCD living in residential care homes. (2) What constitutes good care for people with CCD, their family/supporters, and residential care home staff. (3) Potential barriers and facilitators to providing good care for people with CCD. Methods: (1) Literature review to examine implications for cancerrelated care for people with dementia living in residential care homes. (2) Interviews with 5‐10 men and women with CCD, their family members/ supporters, and residential care home staff. (3) Ethnographic observations of 5‐10 people with CCD to further explore barriers and facilitators to good care. Results: Emergent findings from the literature review will be presented, and their implications for supporting people with CCD living in residential care homes discussed. Conclusions: Findings from this study will help improve the care and support of people with CCD and will contribute to a wider programme of research exploring the cancer care needs of people with dementia across a variety of care settings.

Objectives Increasing financial access to healthcare is proposed to being essential for improving child health outcomes, but the available evidence on the relationship between increased access and health remains scarce. Four years after its launch, we evaluated the contextual effect of user fee removal interventionon the probability of an illness occurring and the likelihood of using health services among children under 5. We also explored the potential effect on the inequality in healthcare access. Methods We used a comparative cross-sectional design based upon household survey data collected years after the intervention onset in one intervention and one comparison district. Propensity scores weighting was used to achieve balance on covariates between the two districts, which was followed by logistic multilevel modelling to estimate average marginal effects (AME). Results We estimated that there was not a significant difference in the reduced probability of an illness occurring in the intervention district compared to thenon-intervention district [AME4.4; 95% CI 1.0-9.8)]. However, the probability of using health services was 17.2% (95% CI 15.0-26.6) higher among children living in theintervention district relative to the comparison district, which rose to 20.7% (95% CI 9.9-31.5) for severe illness episodes. We detected no significant differences in the probability of health services use according to socio-economic status [chi(2) (5)=12.90, p=0.61]. Conclusions for Practice In our study, we found that user fee removal led to a significant increase in the use of health services in the longer term, but it is not adequate by itself to reduce the risk of illness occurrence and socioeconomic inequities in the use of health services.