In 'Dilemma for Appeals to the Moral Significance of Birth', we argued that a dilemma is faced by those who believe that birth is the event at which infanticide is ruled out. Those who reject the moral permissibility of infanticide by appeal to the moral significance of birth must either accept the moral permissibility of a late-term abortion for a non-therapeutic reason or not. If they accept it, they need to account for the strong intuition that her decision is wrong as well as deny the underlying normative principle that killing a viable fetus requires good reason, and not wanting to care for the child when the child could be easily placed for adoption is not a good enough reason to abort. If they reject the moral permissibility of the late-term abortion, they need to explain why her decision is wrong. Doing so, however, will undermine their own project of denying infanticide by appeal to birth. Walter Veit argues that the dilemma relies too much on intuition and does not live up to biological continuity. We explain why his criticisms are unconvincing.Animal ethics committees (AECs) typically focus on the welfare of animals used in experiments, neglecting the potential welfare impact of that animal use on the animal laboratory personnel. Some of this work, particularly the killing of animals, can impose significant psychological burdens that can diminish the well-being of laboratory animal personnel, as well as their capacity to care for animals. We propose that AECs, which regulate animal research in part on the basis of reducing harm, can and ought to require that these harms to researchers are reduced as well. The paper starts by presenting evidence of these burdens and their harm, giving some examples showing how they may be mitigated. We then argue that AECs are well placed to account for these harms to personnel and ought to use their power to reduce their occurrence. We conclude by responding to four potential objections (1) that this problem should be addressed through health and safety administration, not research ethics administration; (2) that the proposal is unjustifiably paternalistic; (3) that these harms to laboratory animal personnel ought to occur, given their treatment of animals; and (4) that mitigating them may lead to worse treatment of research animals.The environmental stage of the apicomplexan Toxoplasma gondii oocyst is vital to its life cycle but largely understudied. Because oocysts are excreted only by infected felids, their availability for research is limited. We report the adaptation of an agarose-based method to immobilize minute amounts of oocysts to perform immunofluorescence assays. Agarose embedding allows high-resolution confocal microscopy imaging of antibodies binding to the oocyst surface as well as unprecedented imaging of intracellular sporocyst structures with Maclura pomifera agglutinin after on-slide permeabilization of the immobilized oocysts. To identify new possible molecules binding to the oocyst surface, we used this method to screen a library of C-type lectin receptor (CLR)-human IgG constant region fusion proteins from the group of related CLRs called the Dectin-1 cluster against oocysts. In addition to CLEC7A that was previously reported to decorate T. gondii oocysts, we present experimental evidence for specific binding of thcreen for molecules interacting with oocysts, such as antibodies, or compounds causing structural damage to oocysts (i.e., disinfectants). Using this method, we screened a small library of C-type lectin receptors (CLRs) present on certain immune cells and found three CLRs able to decorate the oocyst wall of T. gondii and which were not known before to bind to oocysts. These tools will allow further study into oocyst wall composition and could also provoke experiments regarding immunological recognition of oocysts.LuxR solos are related to quorum sensing (QS) LuxR family regulators; however, they lack a cognate LuxI family protein. LuxR solos are widespread and almost exclusively found in proteobacteria. In this study, we investigated the distribution and conservation of LuxR solos in the fluorescent pseudomonads group. Our analysis of more than 600 genomes revealed that the majority of fluorescent Pseudomonas spp. carry one or more LuxR solos, occurring considerably more frequently than complete LuxI/LuxR archetypical QS systems. Based on the adjacent gene context and conservation of the primary structure, nine subgroups of LuxR solos have been identified that are likely to be involved in the establishment of communication networks. Modeling analysis revealed that the majority of subgroups shows some substitutions at the invariant amino acids of the ligand-binding pocket of QS LuxRs, raising the possibility of binding to non-acyl-homoserine lactone (AHL) ligands. Several mutants and gene expression studies on some Luxnd that they are characterized by different genomic organizations and primary structures and can be subdivided into several subgroups. selleckchem The P. fluorescens group consists of more than 50 species, many of which are found in plant-associated environments. The role of LuxR solos in cell-cell signaling in fluorescent pseudomonads is discussed.Chelsey C. Spriggs works in the field of DNA viral entry with a specific interest in virus-host interactions. In this mSphere of Influence article, she reflects on how two papers, "The HCMV assembly compartment is a dynamic Golgi-derived MTOC that controls nuclear rotation and virus spread" (D. J. Procter, A. Banerjee, M. Nukui, K. Kruse, et al., Dev Cell 4583-100.e7, 2018, https//doi.org/10.1016/j.devcel.2018.03.010) and "Cytoplasmic control of intranuclear polarity by human cytomegalovirus" (D. J. Procter, C. Furey, A. G. Garza-Gongora, S. T. Kosak, D. Walsh, Nature 587109-114, 2020, https//doi.org/10.1038/s41586-020-2714-x), impacted her research by reinforcing the scientific value in using viruses to understand cell biology.Chelsie Armbruster studies catheter-associated urinary tract infection and the contribution of microbe-microbe interactions to infection progression and severity. In this mSphere of Influence article, she reflects on how two papers, A. E. Frick-Cheng, A. Sintsova, S. N. Smith, M. Krauthammer, et al., mBio 11e01412-20, 2020, https//doi.org/10.1128/mBio.01412-20, and D. M. Cornforth, F. L. Diggle, J. A. Melvin, J. M. Bomberger, and M. Whiteley, mBio 11e03042-19, 2020, https//doi.org/10.1128/mBio.03042-19, have impacted her thinking about the bacterial strains and experimental models used to study pathogenesis.