asexuality

Microplastics pose risks to marine organisms through ingestion, entanglement, and as carriers of toxic additives and environmental pollutants. Plastic pre-production pellet leachates have been shown to affect the development of sea urchins and, to some extent, mussels. The extent of those developmental effects on other animal phyla remains unknown. Here, we test the toxicity of environmental mixed nurdle samples and new PVC pellets for the embryonic development or asexual reproduction by regeneration of animals from all the major animal superphyla (Lophotrochozoa, Ecdysozoa, Deuterostomia and Cnidaria)...

BACKGROUND: LGBTQIA+ (lesbian, gay, bisexual, trans-gender, queer or questioning, intersex, asexual), and gender-nonconforming (GNC) individuals have limited access to quality care, leading to health disparities. Lack of training and implicit bias are significant contributors to discrimination. Nursing schools must provide opportunities for student interaction with vulnerable populations, and interacting with transgender and GNC individuals during clinical experiences may be challenging...

Malaria blood stage parasites commit to either one of two distinct cellular fates while developing within erythrocytes of their mammalian host: they either undergo another round of asexual replication or they differentiate into nonreplicative transmissible gametocytes. Depending on the state of infection, either path may support or impair the ultimate goal of human-to-human transmission via the mosquito vector. Malaria parasites therefore evolved strategies to control investments into asexual proliferation versus gametocyte formation...

Same-gender couples face unique sexual minority stressors that significantly impact individual and relationship health. This impact may be even greater among same-gender couples living in regions where there are pervasive social and legal biases that affect the lesbian, gay, bisexual, transgender, queer and/or questioning, intersex, asexual, two-spirit (LGBTQIA2S+) community (e.g., south central Appalachia). Brief relationship interventions, like the relationship checkup, are effective at improving relationship health and can be widely disseminated due to the brief and flexible nature of the program...

The golden coral Savalia savaglia is a long-living ecosystem engineer of Mediterranean circalittoral assemblages, able to induce necrosis of gorgonians' and black corals' coenenchyme and grow on their cleaned organic skeleton. Despite its rarity, in Boka Kotorska Bay (Montenegro) a shallow population of more than 1000 colonies was recorded close to underwater freshwater springs, which create very peculiar environmental conditions. In this context, the species was extremely abundant at two sites, while gorgonians were rare...

UNLABELLED: Condensin I is a pentameric complex that regulates the mitotic chromosome assembly in eukaryotes. The kleisin subunit CAP-H of the condensin I complex acts as a linchpin to maintain the structural integrity and loading of this complex on mitotic chromosomes. This complex is present in all eukaryotes and has recently been identified in Plasmodium spp. However, how this complex is assembled and whether the kleisin subunit is critical for this complex in these parasites are yet to be explored...

COPD is a significant cause of morbidity and mortality both in the US and worldwide. LGBTQ+ individuals (lesbian, gay, bisexual, transgender, or queer with the plus sign indicating inclusion of people who are questioning, intersex, asexual, or who hold other gender/sex/romantic identities not specifically identified) have a higher rate of tobacco smoking, predisposing them to an increased risk of developing COPD. Despite this risk, the burden of COPD in LGBTQ+ individuals is not known. Moreover, there is limited focus on efforts to identify and reduce disease risk in this population...

Oomycetes are a group of fungus-like organisms, which phylogenetically comprise early diverging lineages that are mostly holocarpic, and two crown classes, the Peronosporomycetes and Saprolegniomycetes , including many well-investigated pathogens of plants and animals. However, there is a poorly studied group, the Rhipidiales , which placement amongst the crown oomycetes is ambiguous. It accommodates several taxa with a sophisticated vegetative and reproductive cycle, as well as structural organisation, that is arguably the most complex in the oomycete lineage...

In the species groups related to Diphasiastrum multispicatum and D. veitchii, hybridization was investigated in samples from northern and southern Vietnam and the island of Taiwan, including available herbarium specimens from southeast Asia. The accessions were analyzed using flow cytometry (living material only), Sanger sequencing and multiplexed inter-simple sequence repeat genotyping by sequencing. We detected two cases of ancient hybridization involving different combinations of parental species; both led via subsequent duplication to tetraploid taxa...

The life history of a parasite describes its partitioning of assimilated resources into growth, reproduction, and transmission effort, and its precise timing of developmental events. The life cycle, in contrast, charts the sequence of morphological stages from feeding to the transmission forms. Phenotypic plasticity in life history traits can reveal how parasites confront variable environments within hosts. Within the protist phylum Apicomplexa major clades include the malaria parasites, coccidians, and most diverse, the gregarines (with likely millions of species)...

Malaria is caused by parasites of the Plasmodium genus and remains one of the most pressing human health problems. The spread of parasites resistant to or partially resistant to single or multiple drugs, including frontline antimalarial artemisinin and its derivatives, poses a serious threat to current and future malaria control efforts. In vitro drug assays are important for identifying new antimalarial compounds and monitoring drug resistance. Due to its robustness and ease of use, the [3 H]-hypoxanthine incorporation assay is still considered a gold standard and is widely applied, despite limited sensitivity and the dependence on radioactive material...

Taenia solium is the aetiological agent of taeniasis/cysticercosis, one of the most severe neglected tropical diseases (NTD) according to the World Health Organization (WHO). The life cycle of T. solium alternates between pigs (intermediate host) and humans (definitive host). In addition, humans can act as accidental intermediate hosts if they ingest infective eggs. In this case, the most severe condition of the disease occurs when parasites invade the central nervous system, causing neurocysticercosis (NCC)...

Digital, self-guided mental health programs are a promising avenue for mental health support for LGBTQIA+ (lesbian, gay, bisexual, trans, Queer, intersex, asexual plus additional sexuality, gender, and romantic identities) people - however, healthcare providers (HCPs) perspectives on programs are largely unknown. The aim of this study was to explore these perspectives. A cross-sectional online survey was distributed across Australia, with a final sample of 540 HCPs from a range of disciplines. Most respondents (419, 81...

Malaria is a devastating disease that causes significant morbidity worldwide. The development of new antimalarial chemotypes is urgently needed because of the emergence of resistance to frontline therapies. Independent phenotypic screening campaigns against the Plasmodium asexual parasite, including our own, identified the aryl amino acetamide hit scaffold. In a prior study, we identified the STAR-related lipid transfer protein (PfSTART1) as the molecular target of this antimalarial chemotype. In this study, we combined structural elements from the different aryl acetamide hit subtypes and explored the structure-activity relationship...

Gametocyte development of the Plasmodium parasite is a key step for transmission of the parasite. Male and female gametocytes are produced from a subpopulation of asexual blood-stage parasites, but the mechanisms that regulate the differentiation of sexual stages are still under investigation. In this study, we investigated the role of PbARID, a putative subunit of a SWI/SNF chromatin remodeling complex, in transcriptional regulation during the gametocyte development of P. berghei. PbARID expression starts in early gametocytes before the manifestation of male and female-specific features, and disruption of its gene results in the complete loss of gametocytes with detectable male features and the production of abnormal female gametocytes...

Lesbian, gay, bisexual, transgender, queer, intersex, and asexual/aromantic (LGBTQIA+) providers improve health outcomes of sexual and gender minority (SGM) patients, which demonstrates the importance of understanding the state of LGBTQIA+ representation at all levels of medical training. The U.S. does not systematically collect sexual orientation and gender identity (SOGI) data from applicants, trainees, and attending physicians, prompting us to wonder whether SGM representation in surgical fields, such as otolaryngology, is adequate...

BACKGROUND: Men who have sex with men (MSM) are disproportionately burdened by poor mental health. Despite the increasing burden, evidence-based interventions for MSM are largely nonexistent in Nepal. OBJECTIVE: This study explored mental health concerns, contributing factors, barriers to mental health care and support, and preferred interventions to improve access to and use of mental health support services among MSM in Nepal. METHODS: We conducted focus groups with MSM in Kathmandu, Nepal, in January 2023...

BACKGROUND: Natural medicinal products are commonly used as a remedy against malaria infections in African populations and have become a major source of information for the screening of new and more effective antiplasmodial molecules. Therefore, in vitro studies are needed to validate the efficacy of these medicinal products and to explore the potential effects of such drugs on the genetic diversity of Plasmodium falciparum . The current study has investigated the impact of some Beninese plant extracts with antiplasmodial activity on the genetic diversity of P...

IMPORTANCE: Best recruitment practices for increasing diversity are well established, but the adoption and impact of these practices in ophthalmology residency recruitment are unknown. OBJECTIVE: To describe the adoption of bias reduction practices in groups underrepresented in ophthalmology (URiO) residency recruitment and determine which practices are effective for increasing URiO residents. DESIGN, SETTING, AND PARTICIPANTS: This cross-sectional survey study used an 18-item questionnaire included in the online survey of the Association of University Professors in Ophthalmology (AUPO) Residency Program Directors...

Arthrobotrys oligospora , a widespread nematode-trapping fungus which can produce conidia for asexual reproduction and form trapping devices (traps) to catch nematodes. However, little is known about the sporulation mechanism of A. oligospora . This research characterized the functions and regulatory roles of the upstream spore-producing regulatory genes, AosfgA and AofluG , in A. oligospora . Our analysis showed that AosfgA and AofluG interacted with each other. Meanwhile, the AofluG gene was downregulated in the Δ AosfgA mutant strain, indicating that AosfgA positively regulates AofluG ...