Health ethics and Indigenous ethnocide

In colonial societies such as Canada the implications of colonialism and ethnocide (or cultural genocide) for ethical decision‐making are ill‐understood yet have profound implications in health ethics and other spheres. They combine to shape racism in health care in ways, sometimes obvious, more often subtle, that are inadequately understood and often wholly unnoticed. Along with overt experiences of interpersonal racism, Indigenous people with health care needs are confronted by systemic racism in the shaping of institutional structures, hospital policies and in resource allocation decisions. Above all, racism is a function of state law – of the unilateral imposition of the settler society law on Indigenous communities. Indeed, the laws, including health laws, are social determinants of the ill‐health of Indigenous peoples. This article describes the problem of Indigenous ethnocide and explores its ethical implications. It thereby problematizes the role of law in health ethics.     

Homologization of storage proteins from Aquilegia vulgaris and Digitalis purpurea

The separation of the main seed proteins from Aquilegia vulgaris and Digitalis purpurea by means of Sephadex G-200 gel filtration and DEAE-Sephadex ion exchange absorption resulted in remarkably similar patterns. Using gel electrophoresis and serological techniques this phenomenon has been attributed to the predominance of two storage proteins present in each taxon: (a) one main protein in Aquilegia (= nigellin) and in Digitalis (= tubiflorin), each, being similar, but probably not homologous. (b) A secondary protein (= aquilegilin) was identified in both taxa. The distribution of only a few storage proteins in Magnoliophytina (angiosperms) with different serological reactivity (= different primary structure) has been presumed, based upon the data obtained.     

Presence‐only versus presence–absence data in species composition determinant analyses

Aim Studying relationships between species and their physical environment requires species distribution data, ideally based on presence–absence (P–A) data derived from surveys. Such data are limited in their spatial extent. Presence‐only (P‐O) data are considered inappropriate for such analyses. Our aim was to evaluate whether such data may be used when considering a multitude of species over a large spatial extent, in order to analyse the relationships between environmental factors and species composition. Location The study was conducted in virtual space. However, geographic origin of the data used is the contiguous USA. Methods We created distribution maps for 50 virtual species based on actual environmental conditions in the study. Sampling locations were based on true observations from the Global Biodiversity Information Facility. We produced P–A data by selecting ∼1000 random locations and recorded the presence/absence of all species. We produced two P‐O data sets. Full P‐O set was produced by sampling the species in locations of true occurrences of species. Partial P‐O was a subset of full P‐O data set matching the size of the P–A data set. For each data set, we recorded the environmental variables at the same locations. We used CCA to evaluate the amount of variance in species composition explained by each variable. We evaluated the bias in the data set by calculating the deviation of average values of the environmental variables in sampled locations compared to the entire area. Results P–A and P‐O data sets were similar in terms of the amount of variance explained by the different environmental variables. We found sizable environmental and spatial bias in the P‐O data set, compared to the entire study area. Main conclusions Our results suggest that although P‐O data from collections contain bias, the multitude of species, and thus the relatively large amount of information in the data, allow the use of P‐O data for analysing environmental determinants of species composition.     

Sewage dilution and loss of antibiotic resistance and virulence determinants in E. coli

The possession of potential virulence factors (serum resistance, aerobactin production, colicin production) and antibiotic resistance was evaluated in 418 E. coli strains isolated from river water. The strains were isolated from 11 points showing different levels of contamination. From the data obtained, it can be concluded that bacteria from less contaminated water present less antibiotic resistance and virulence factors than those isolated from highly contaminated water. This situation suggests that E. coli strains producing plasmid encoded antibiotic resistance and/or virulence factors, survive less well in aquatic environments without selective pressure) than the sensitive non-virulent ones.     

Discovery of phage determinants that confer sensitivity to bacterial immune systems

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