Novel insights into the genetic diversity of Balantidium and Balantidium-like cyst-forming ciliates

Balantidiasis is considered a neglected zoonotic disease with pigs serving as reservoir hosts. However, Balantidium coli has been recorded in many other mammalian species, including primates. Here, we evaluated the genetic diversity of B. coli in non-human primates using two gene markers (SSrDNA and ITS1-5.8SDNA-ITS2). We analyzed 49 isolates of ciliates from fecal samples originating from 11 species of captive and wild primates, domestic pigs and wild boar. The phylogenetic trees were computed using Bayesian inference and Maximum likelihood. Balantidium entozoon from edible frog and Buxtonella sulcata from cattle were included in the analyses as the closest relatives of B. coli, as well as reference sequences of vestibuliferids. The SSrDNA tree showed the same phylogenetic diversification of B. coli at genus level as the tree constructed based on the ITS region. Based on the polymorphism of SSrDNA sequences, the type species of the genus, namely B. entozoon, appeared to be phylogenetically distinct from B. coli. Thus, we propose a new genus Neobalantidium for the homeothermic clade. Moreover, several isolates from both captive and wild primates (excluding great apes) clustered with B. sulcata with high support, suggesting the existence of a new species within this genus. The cysts of Buxtonella and Neobalantidium are morphologically indistinguishable and the presence of Buxtonella-like ciliates in primates opens the question about possible occurrence of these pathogens in humans

Dirofilaria spp. And angiostrongylus vasorum: Current risk of spreading in central and northern europe

In the past few decades, the relevance of Dirofilaria immitis and Dirofilaria repens, causing cardiopulmonary and subcutaneous dirofilariosis in dogs and cats, and of Angiostrongylus vasorum, causing canine angiostrongylosis, has steadily increased in Central and Northern Europe. In this review, a summary of published articles and additional reports dealing with imported or autoch-thonous cases of these parasites is provided for Central (Austria, Czechia, Germany, Hungary, Lux-emburg, Poland, Slovakia, Slovenia, and Switzerland) and Northern (Denmark, Finland, Iceland, Norway, and Sweden) Europe. Research efforts focusing on Dirofilaria spp. and A. vasorum have varied by country, and cross-border studies are few. The housing conditions of dogs, pet move-ments, the spread of competent vectors, and climate change are important factors in the spread of these nematodes. Dogs kept outside overnight are a major factor for the establishment of Dirofilaria spp. However, the establishment of invasive, diurnal, synanthropic, competent mosquito vectors such as Aedes albopictus may also influence the establishment of Dirofilaria spp. The drivers of the spread of A. vasorum remain not fully understood, but it seems to be influenced by habitats shared with wild canids, dog relocation, and possibly climatic changes; its pattern of spreading appears to be similar in different countries. Both Dirofilaria spp. and A. vasorum merit further monitoring and research focus in Europe

Plasticity in the Human Gut Microbiome Defies Evolutionary Constraints

The gut microbiome of primates, including humans, is reported to closely follow host evolutionary history, with gut microbiome composition being specific to the genetic background of its primate host. However, the comparative models used to date have mainly included a limited set of closely related primates. To further understand the forces that shape the primate gut microbiome, with reference to human populations, we expanded the comparative analysis of variation among gut microbiome compositions and their primate hosts, including 9 different primate species and 4 human groups characterized by a diverse set of subsistence patterns (n = 448 samples). The results show that the taxonomic composition of the human gut microbiome, at the genus level, exhibits increased compositional plasticity. Specifically, we show unexpected similarities between African Old World monkeys that rely on eclectic foraging and human populations engaging in nonindustrial subsistence patterns; these similarities transcend host phylogenetic constraints. Thus, instead of following evolutionary trends that would make their microbiomes more similar to that of conspecifics or more phylogenetically similar apes, gut microbiome composition in humans from nonindustrial populations resembles that of generalist cercopithecine monkeys. We also document that wild cercopithecine monkeys with eclectic diets and humans following nonindustrial subsistence patterns harbor high gut microbiome diversity that is not only higher than that seen in humans engaging in industrialized lifestyles but also higher compared to wild primates that typically consume fiber-rich diets

Changes in Children's Sibling Relationships After Pediatric Bone Marrow Transplantation and Children's Adaptation: A Grounded Theory Approach

In the present study, a grounded theory approach was employed with the purpose of developing a substantive theoretical model to identify and illustrate changes in sibling relationships after pediatric bone marrow transplantation (BMT). Further investigation of the impact of sibling relationship quality on children's adaptation following this life-threatening medical procedure was examined. Two families, each consisting of a sibling dyad that included a child who received a BMT and a well sibling that ranged in age from 10-14 and a parent, participated in the study. Siblings were interviewed individually, and in the dyad, to capture an insider's view of the sibling relationship after BMT and factors that impact child adaptation to pediatric BMT. Child observational and parent survey data provided a multiple-informant and multiple-method approach which helped to foster a more complete picture of the broader family context. Findings suggest that children's sibling relationships improved after BMT, as evidenced by their building a close relationship, establishing intimacy and gaining trust, and learning to get along and settle differences better. Positive coping strategies included identifying and utilizing supports and resources, praying/prayer, making life easier for the sibling, and redefining what is important in life. Children's individual adaptation outcomes included accepting the illness, recognizing the longevity of the relationship, reducing worry/stress, and moving beyond the illness. Analyses that were grounded in the data from the present study suggest four theoretical propositions. First,children's sibling relationships have the potential for positive change after BMT. Second, close sibling relationships can serve as a buffer, or protective factor, to the adverse conditions and extremely stressful situations encountered after BMT. Third, positive changes in children's sibling relationships after BMT can positively influence children's coping strategies which may have a direct influence on children's adaptation to BMT. The fourth, and primary hypothesis, suggests that positive changes in children's sibling relationships after BMT potentiate new coping strategies in the dyad that are more facilitative to child adaptation than managing stress on one's own. Findings add to the general knowledge on sibling relationships and shed light on the complexities of children's sibling relationships when one child is severely ill