Care for infibulated women giving birth in Norway: an anthropological analysis of health workers' management of a medically and culturally unfamiliar issue

The focus of this article is on Norwegian health care workers' experience and management of birth care of women who have undergone infibulation. Because infibulation is the most extensive form of female genital cutting, infibulated women experience a higher risk of birth complications, and health workers generally experience delivery care for this group as challenging. Infibulated women, who come from recently arrived immigrant groups, are a challenge to the predominant Norwegian birth philosophy of "natural childbirth" and the positive evaluation of everything considered natural. The challenges relate to a mixture of technical know-how and a complex set of interpretations of central cultural elements of gender, nature, health, and gender equity. The findings suggest that a combination of taboo, silence, limited knowledge, and emotional difficulty along with a wish to be culture sensitive may at times prove counterproductive to giving the best help. Health care workers often seem to impose "imagined" cultural values on infibulated women, rather than clarifying them through personal communication.     

Social enhancement can create adaptive,arbitrary and maladaptive cultural traditions

Many animals are known to learn socially, i.e. they are able to acquire new behaviours by using information from other individuals. Researchers distinguish between a number of different social-learning mechanisms such as imitation and social enhancement. Social enhancement is a simple form of social learning that is among the most widespread in animals. However, unlike imitation, it is debated whether social enhancement can create cultural traditions. Based on a recent study on capuchin monkeys, we developed an agent-based model to test the hypotheses that (i) social enhancement can create and maintain stable traditions and (ii) social enhancement can create cultural conformity. Our results supported both hypotheses. A key factor that led to the creation of cultural conformity and traditions was the repeated interaction of individual reinforcement and social enhancement learning. This result emphasizes that the emergence of cultural conformity does not necessarily require cognitively complex mechanisms such as ‘copying the majority’ or group norms. In addition, we observed that social enhancement can create learning dynamics similar to a ‘copy when uncertain’ learning strategy. Results from additional analyses also point to situations that should favour the evolution of learning mechanisms more sophisticated than social enhancement.     

Shared and Separate Knowledge among Eight Cultural Groups Based on Ethnobotanical Uses of Rhododendron (Ericaceae) in Yunnan Province, China

Shared and Separate Knowledge among Eight Cultural Groups Based on Ethnobotanical Uses of Rhododendron (Ericaceae) in Yunnan Province, China. Yunnan, a province in southwest China, is known for its cultural diversity of 25 ethnic minorities and its vast Himalayan biodiversity, especially of Rhododendron. Previous literature has shown that some cultural groups share ethnobotanical knowledge while other cultural groups keep their knowledge separate. We investigated factors that may lead to the sharing of knowledge based on the uses of rhododendron among seven cultural minorities (the Bai, Dulong, Lisu, Naxi, Nu, Tibetan, and Yi) and the Han majority. Semistructured interviews about rhododendrons were conducted with approximately 30 individuals in each cultural group. Cluster analyses and a new analysis method were conducted to determine the within-group homogeneity of knowledge of rhododendron uses to test hypotheses related to strength of cultural traditions. The Dulong, Lisu, and Nu were compared with each other as these groups share villages and languages. The Naxi, Tibetan, and Yi live predominantly with members of their cultural group, and are often monolingual; thus, these three cultural minorities were compared. The Bai and Han compose the final comparison as the Bai are increasingly interacting with the local Han majority as tourism grows in that area. The Bai, Dulong, Han, Lisu, and Nu had variable answers within each group, while the Naxi, Tibetan, and Yi have homogeneous knowledge of uses of rhododendron within their cultural group. Among the eight cultural groups compared for this study, factors such as sharing of language, overlap of living situation, and sharing of markets leads to non-homogenous knowledge of rhododendron uses among members of the same cultural group.     

Symbiosis drove cellular evolution

Anthropocentric cultural bias led to conceptualizations of evolution as a tree with branches leading to a crown of vertebrates and higher plants. Gradually refined over the years it became part of common scientific culture to think of eukaryotic evolution as process by which cells, limited by surface to volume ratios and other factors, became specialized, leading to multi-cellularity and eventually to the crowned tree. Knowledge of other pathways of cellular evolution is available, but not broadly recognized. Molecular systematics, genetic analyses and ultrastructural comparisons have changed our outlook on evolution and the diversity of life. The discovery of a huge (average size 2.1 cm) unicellular, new, exceptionally complex, dinoflagellate-hosting soritid foraminiferan from the Heron-Wistori Channel, (GBR Australia) gave impetus to re-explore some old ideas on cellular evolution and place them in a contemporary context. In particular, it caused change in perspective of the evolution of the collective group known as larger foraminifera (LF). They exemplify the power by which symbiosis drove the evolution of a predisposed and malleable group of organisms. The factors that underlay foraminiferan predisposition to symbioses with algae are discussed. Each of the evolutionary lines of LF has developed, in its own way, amazing structural adaptations making them extremely complex giant cells.     

Daphnia comes of age: an ecological model in the genomic era

Scientists in various subdisciplines of biology have long relied on model organisms to push the frontiers of knowledge forward as far as possible in their specific field. Today, interdisciplinary science requires model organisms that can push our understanding on multiple frontiers and help us formulate and address more complex questions. Members of the genus Daphnia represent just such an interdisciplinary model. Daphnia are aquatic microcrustaceans (also known as waterfleas) that have long been central to the study of ecology and toxicology and have recently been developed as a genomic model. A recent survey of both nuclear and mitochondrial markers in populations of the Daphnia pulex complex from high-altitude lakes in South America ( Mergeay et al . 2008, this issue ) provides an excellent example of how genetic data and ecological information can be used to push the boundaries of our understanding in molecular ecology. In this species complex, extensive hybridization has occurred resulting in polyploidization and, consequently, asexuality. Their data reveal high levels of genetic diversity, incongruence in phylogenetic signal among genomes (nuclear and mitochondrial), cryptic species in the complex, and a new model for the historical spread of the species throughout the Americas. Their data indicate that genome-level changes have occurred in this species which have profound consequences in an ecological context, the implications of which can be more fully appreciated because of our extensive knowledge of the ecology and natural history of the genus Daphnia .     

The Cultural Keystone Concept: Insights from Ecological Anthropology

The concept of the keystone species has a long history in ecological analysis, although its validity remains controversial. Anthropological researchers have recently coined the term cultural keystone species, but have not demonstrated any significant differences from existing treatments of culturally important species. We define cultural keystones according to their systemic function, as having essential roles in maintaining any level of complexity within a social–ecological system. Examples include bitter cassava consumption among lowland South American groups such as the Wapishana in Guyana, and commercial cultivation of carrots in Rurukan Village in Minahasa, Indonesia. These examples are both essential at one level of systemic reproduction: within the domestic and village economy in the cassava case, and carrots within regional markets. While each is centred upon a single biological species, the cultural keystone itself is not this species, but a complex incorporating several material and non-material system elements.     

Recent origin and cultural reversion of a hunter-gatherer group

Contemporary hunter–gatherer groups are often thought to serve as models of an ancient lifestyle that was typical of human populations prior to the development of agriculture. Patterns of genetic variation in hunter–gatherer groups such as the !Kung and African Pygmies are consistent with this view, as they exhibit low genetic diversity coupled with high frequencies of divergent mtDNA types not found in surrounding agricultural groups, suggesting long-term isolation and small population sizes. We report here genetic evidence concerning the origins of the Mlabri, an enigmatic hunter–gatherer group from northern Thailand. The Mlabri have no mtDNA diversity, and the genetic diversity at Y-chromosome and autosomal loci are also extraordinarily reduced in the Mlabri. Genetic, linguistic, and cultural data all suggest that the Mlabri were recently founded, 500–800 y ago, from a very small number of individuals. Moreover, the Mlabri appear to have originated from an agricultural group and then adopted a hunting–gathering subsistence mode. This example of cultural reversion from agriculture to a hunting–gathering lifestyle indicates that contemporary hunter–gatherer groups do not necessarily reflect a pre-agricultural lifestyle.     

Mitochondrial cytochrome <Emphasis Type="Italic">c</Emphasis> oxidase and succinate dehydrogenase complexes contain plant specific subunits

Respiratory oxidative phosphorylation represents a central functionality in plant metabolism, but the subunit composition of the respiratory complexes in plants is still being defined. Most notably, complex II (succinate dehydrogenase) and complex IV (cytochrome c oxidase) are the least defined in plant mitochondria. Using Arabidopsis mitochondrial samples and 2D Blue-native/SDS-PAGE, we have separated complex II and IV from each other and displayed their individual subunits for analysis by tandem mass spectrometry and Edman sequencing. Complex II can be discretely separated from other complexes on Blue-native gels and consists of eight protein bands. It contains the four classical SDH subunits as well as four subunits unknown in mitochondria from other eukaryotes. Five of these proteins have previously been identified, while three are newly identified in this study. Complex IV consists of 9–10 protein bands, however, it is more diffuse in Blue-native gels and co-migrates in part with the translocase of the outer membrane (TOM) complex. Differential analysis of TOM and complex IV reveals that complex IV probably contains eight subunits with similarity to known complex IV subunits from other eukaryotes and a further six putative subunits which all represent proteins of unknown function in Arabidopsis. Comparison of the Arabidopsis data with Blue-native/SDS-PAGE separation of potato and bean mitochondria confirmed the protein band complexity of these two respiratory complexes in plants. Two-dimensional Blue-native/Blue-native PAGE, using digitonin followed by dodecylmaltoside in successive dimensions, separated a diffusely staining complex containing both TOM and complex IV. This suggests that the very similar mass of these complexes will likely prevent high purity separations based on size. The documented roles of several of the putative complex IV subunits in hypoxia response and ozone stress, and similarity between new complex II subunits and recently identified plant specific subunits of complex I, suggest novel biological insights can be gained from respiratory complex composition analysis.     

The mis-measure of manioc (Manihot esculenta,Euphorbiaceae)

The distinction between “bitter” and “sweet” (toxic and non-toxic) varieties of the cyanide-containing food crop manioc (Manihot esculenta, Euphorbiaceae) has a long tradition in the tropical forest areas of South and Central America where it was first cultivated. Yet this distinction has no taxonomic basis. The levels of cyanogenic glucosides found in manioc varieties not only vary widely, but do not correspond with any other known morphological or ecological feature. Nonetheless, these two “varieties” are commonly reported to have distinct geographical and cultural distributions and each is associated with a particular traditional food complex. This paper reviews the literature regarding the nature, distribution, and traditional uses of manioc varieties and concludes that (1) the geographical and cultural distribution of bitter and sweet varieties of manioc may not be as distinct as has been thought; (2) traditional categories of bitter and sweet manioc may stem more from culturally derived belief systems than from actual known levels of toxicity; and (3) the choice of complex and labor intensive processing methods usually associated with bitter manioc may not be required for detoxification but rather for the derived food products, particularly manioc flour.     

Recent Origin and Cultural Reversion of a Hunter–Gatherer Group

Contemporary hunter–gatherer groups are often thought to serve as models of an ancient lifestyle that was typical of human populations prior to the development of agriculture. Patterns of genetic variation in hunter–gatherer groups such as the !Kung and African Pygmies are consistent with this view, as they exhibit low genetic diversity coupled with high frequencies of divergent mtDNA types not found in surrounding agricultural groups, suggesting long-term isolation and small population sizes. We report here genetic evidence concerning the origins of the Mlabri, an enigmatic hunter–gatherer group from northern Thailand. The Mlabri have no mtDNA diversity, and the genetic diversity at Y-chromosome and autosomal loci are also extraordinarily reduced in the Mlabri. Genetic, linguistic, and cultural data all suggest that the Mlabri were recently founded, 500–800 y ago, from a very small number of individuals. Moreover, the Mlabri appear to have originated from an agricultural group and then adopted a hunting–gathering subsistence mode. This example of cultural reversion from agriculture to a hunting–gathering lifestyle indicates that contemporary hunter–gatherer groups do not necessarily reflect a pre-agricultural lifestyle.     

Ethnobotany of chumash indians,California, Based on Collections by John P. Harrington

At least 150 plant species were used for food, medicine, material culture, and religious practices by the Chumash Indians of southern California. A great deal of traditional Chumash plant knowledge survived into the present century, despite massive deculturation. The most significant source of information on Chumash ethnobotany is the extensive, unpublished field notes of John P. Harrington, based on interviews conducted from 1912 into the 1950s. Several hundred voucher specimens collected by some of Harrington’s consultants have also been preserved, along with the original notes, at the Smithsonian Institution. Data are presented here on knowledge and uses of plants in this important California Indian culture, as reconstructed from the Harrington material. Changes in plant knowledge resulting from Euro-American contact are also discussed.     

Evolution of the perennial soybean polyploid complex (Glycine subgenus Glycine): a study of contrasts

Glycine subgenus Glycine , the sister group to the cultivated soybean and its progenitor, have received considerable study over several decades. The combination of biosystematic data and an extensive germplasm collection has provided a strong foundation for molecular systematic studies in the group, including those on allopolyploids. These studies have shown that the various polyploid taxa known from the subgenus are all part of a single large allopolyploid complex, linked by shared diploid genomes. Many elements of the complex have arisen recently, and most show evidence of recurrent origins. However, there are also many dissimilarities among even closely related polyploids. Polyploids differ from one another in such ways as number of origins, amount of allelic diversity harboured at different loci, bidirectional vs. unidirectional origins, retention of ribosomal gene homoeologues, success as measured by geographical range and abundance, and patterns of gene expression.  © 2004 The Linnean Society of London, Biological Journal of the Linnean Society , 2004, 82 , 583–597.     

Dynamics of Cultural Transmission in Native Americans of the High Great Plains

Culture is a phenomenon shared by all humans. Attempts to understand how dynamic factors affect the origin and distribution of cultural elements are, therefore, of interest to all humanity. As case studies go, understanding the distribution of cultural elements in Native American communities during the historical period of the Great Plains would seem a most challenging one. Famously, there is a mixture of powerful internal and external factors, creating-for a relatively brief period in time-a seemingly distinctive set of shared elements from a linguistically diverse set of peoples. This is known across the world as the “Great Plains culture.” Here, quantitative analyses show how different processes operated on two sets of cultural traits among nine High Plains groups. Moccasin decorations exhibit a pattern consistent with geographically-mediated between-group interaction. However, group variations in the religious ceremony of the Sun Dance also reveal evidence of purifying cultural selection associated with historical biases, dividing down ancient linguistic lines. The latter shows that while the conglomeration of “Plains culture” may have been a product of merging new ideas with old, combined with cultural interchange between groups, the details of what was accepted, rejected or elaborated in each case reflected preexisting ideological biases. Although culture may sometimes be a “melting pot,” the analyses show that even in highly fluid situations, cultural mosaics may be indirectly shaped by historical factors that are not always obvious.     

Ornithodoros porcinus ticks, bushpigs, and African swine fever in Madagascar

African swine fever (ASF) has recently made its appearance in Madagascar. Ticks of the Ornithodoros moubata group, considered to be O. porcinus Walton, 1962 were formerly known to occur in western Madagascar, but seem to have disappeared from that region. However, three new sites where they occur were found in the humid and cool central highlands of Anatananarivo province. These ticks are known to be efficient reservoirs and vectors of ASF and constitute a considerable complication to the control of the disease. The authors also discuss another potentially complicating factor, the presence of a species of African bushpig, Potamochoerus larvatus.     

Are promyelocytic leukaemia protein nuclear bodies a scaffold for caspase-2 programmed cell death?

Promyelocytic leukaemia protein nuclear bodies (PML-NBs) are nuclear structures whose function is still poorly understood. They are implicated in various biological functions, such as viral infection, cellular transformation, innate immunity and growth control, and they might be dynamic hubs sensing stress and DNA damage. Data from PML(-/-) mice suggest that PML-NBs are involved in apoptosis via caspase-independent mechanisms, probably involving p53-dependent and independent pathways. However, the recently demonstrated co-localization of caspase-2 within the PML-NB nuclear structures presents a new paradigm for nuclear cell death. Here, we show that these nuclear structures have a protein known as SP100 that could contain a caspase recruitment domain (CARD). If verified experimentally, this discovery will suggest a mechanism by which caspase-2 could be recruited into the complex and ultimately lead to apoptosis.     

Emerging rickettsioses

Ticks are known to carry and transmit a number of microbial agents that cause diseases in humans and animals. Among these are members of the order Rickettsiales (alpha-proteobacteria), which include the genera Rickettsia and Ehrlichia. The most common and well-known Rickettsial human disease in Europe is Mediterranean Spotted Fever (MSF), caused by Rickettsia conorii. In recent years, a number of new Rickettsia species have been discovered in Europe, some of which have been shown to be pathogenic to humans. These discoveries have been facilitated by use of sequence-based molecular identification techniques. In Italy, it is generally believed that R. conorii is the only Rickettsia species present, and clinical tests for MSF rely on antigens raised against this bacterium. We are currently undertaking a molecular screening study of Rickettsiales-bacteria in ticks from various regions of Italy, to check for the potential presence of species from this order recently discovered in other parts of Europe. So far, we have identified a number of additional species in ticks collected from northern, central and southern regions. These include the known pathogens R. helvetica and R. slovaca as well as two species which may or may not be of medical relevance: R. monacensis and R. sp. IRS4. As a part of this survey, we have identified a novel alphaproteobacterium from the medically important tick Ixodes ricinus. This bacterium, tentatively named IricES1, has the unusual property of existing within the mitochondria, as well as the cytoplasm, of ovarian cells. To our knowledge, this is the only known example of a bacterium that is able to enter the mitochondria of animals. Our recently published electron microscopic data indicates that the bacterium enters mitochondria between the inner and outer membranes, and then proceeds to consume the inner mitochondrial matrix. We will present further data on this bacterium, including: 1) its phylogenetic position based on various molecular sequences, 2) its localization within the tick based on in situ hybridization; 3) its distribution among tick populations in Europe; 4) preliminary data on attempts at culturing this bacterium in a variety of cell types. Possible interactions between the bacterium and its host will be discussed. Ticks are known to carry and transmit a number of microbial agents that cause diseases in humans and animals. Among these are members of the order Rickettsiales (alpha-proteobacteria), which include the genera Rickettsia and Ehrlichia. The most common and well-known Rickettsial human disease in Europe is Mediterranean Spotted Fever (MSF), caused by Rickettsia conorii. In recent years, a number of new Rickettsia species have been discovered in Europe, some of which have been shown to be pathogenic to humans. These discoveries have been facilitated by use of sequence-based molecular identification techniques. In Italy, it is generally believed that R. conorii is the only Rickettsia species present, and clinical tests for MSF rely on antigens raised against this bacterium. We are currently undertaking a molecular screening study of Rickettsiales-bacteria in ticks from various regions of Italy, to check for the potential presence of species from this order recently discovered in other parts of Europe. So far, we have identified a number of additional species in ticks collected from northern, central and southern regions. These include the known pathogens R. helvetica and R. slovaca as well as two species which may or may not be of medical relevance: R. monacensis and R. sp. IRS4. As a part of this survey, we have identified a novel alphaproteobacterium from the medically important tick Ixodes ricinus. This bacterium, tentatively named IricES1, has the unusual property of existing within the mitochondria, as well as the cytoplasm, of ovarian cells. To our knowledge, this is the only known example of a bacterium that is able to enter the mitochondria of animals. Our recently published electron microscopic data indicates that the bacterium enters mitochondria between the inner and outer membranes, and then proceeds to consume the inner mitochondrial matrix. We will present further data on this bacterium, including: 1) its phylogenetic position based on various molecular sequences, 2) its localization within the tick based on in situ hybridization; 3) its distribution among tick populations in Europe; 4) preliminary data on attempts at culturing this bacterium in a variety of cell types. Possible interactions between the bacterium and its host will be discussed.     

Morphological and Genetic Diversity of Opisthosporidia: New Aphelid Paraphelidium tribonemae gen. et sp. nov.

Aphelids are a poorly known group of parasitoids of algae that have raised considerable interest due to their pivotal phylogenetic position. Together with Cryptomycota and the highly derived Microsporidia, they have been recently re‐classified as the Opisthosporidia, which constitute the sister group to the fungi within the Holomycota. Despite their huge diversity, as revealed by molecular environmental studies, and their phylogenetic interest, only three genera have been described (Aphelidium, Amoeboaphelidium, and Pseudaphelidium), from which 18S rRNA gene sequences exist only for Amoeboaphelidium and Aphelidium species. Here, we describe the life cycle and ultrastructure of a new representative of Aphelida, Paraphelidium tribonemae gen. et sp. nov., and provide the first 18S rRNA gene sequence obtained for this genus. Molecular phylogenetic analysis indicates that Paraphelidium is distantly related to both Aphelidium and Amoebaphelidium, highlighting the wide genetic diversity of aphelids. Paraphelidium tribonemae has amoeboflagellate zoospores containing a lipid‐microbody complex, dictyosomes, and mitochondria with rhomboid cristae, which are also present in trophonts and plasmodia. The amoeboid trophont uses pseudopodia to feed from the host cytoplasm. Although genetically distinct, the genus Paraphelidium is morphologically indistinguishable from other aphelid genera and has zoospores able to produce lamellipodia with subfilopodia like those of Amoeboaphelidium.