Evidence for the ‘Good Genes’ Model: Association of MHC Class II DRB Alleles with Ectoparasitism and Reproductive State in the Neotropical Lesser Bulldog Bat, Noctilio albiventris

The adaptive immune system has a major impact on parasite resistance and life history strategies. Immunological defence is costly both in terms of immediate activation and long-term maintenance. The ‘good genes’ model predicts that males with genotypes that promote a good disease resistance have the ability to allocate more resources to reproductive effort which favours the transmission of good alleles into future generations. Our study shows a correlation between immune gene constitution (Major Histocompatibility Complex, MHC class II DRB), ectoparasite loads (ticks and bat flies) and the reproductive state in a neotropical bat, Noctilio albiventris. Infestation rates with ectoparasites were linked to specific Noal-DRB alleles, differed among roosts, increased with body size and co-varied with reproductive state particularly in males. Non-reproductive adult males were more infested with ectoparasites than reproductively active males, and they had more often an allele (Noal-DRB*02) associated with a higher tick infestation than reproductively active males or subadults. We conclude that the individual immune gene constitution affects ectoparasite susceptibility, and contributes to fitness relevant trade-offs in male N. albiventris as suggested by the ‘good genes’ model

Expression of the blood-group-related glycosyltransferase B4galnt2 influences the intestinal microbiota in mice

Glycans on mucosal surfaces have an important role in host–microbe interactions. The locus encoding the blood-group-related glycosyltransferase β-1,4-N-acetylgalactosaminyltransferase 2 (B4galnt2) is subject to strong selective forces in natural house-mouse populations that contain a common allelic variant that confers loss of B4galnt2 gene expression in the gastrointestinal (GI) tract. We reasoned that altered glycan-dependent intestinal host–microbe interactions may underlie these signatures of selection. To determine whether B4galnt2 influences the intestinal microbial ecology, we profiled the microbiota of wild-type and B4galnt2-deficient siblings throughout the GI tract using 16S rRNA gene pyrosequencing. This revealed both distinct communities at different anatomic sites and significant changes in composition with respect to genotype, indicating a previously unappreciated role of B4galnt2 in host–microbial homeostasis. Among the numerous B4galnt2-dependent differences identified in the abundance of specific bacterial taxa, we unexpectedly detected a difference in the pathogenic genus, Helicobacter, suggesting Helicobacter spp. also interact with B4galnt2 glycans. In contrast to other glycosyltransferases, we found that the host intestinal B4galnt2 expression is not dependent on presence of the microbiota. Given the long-term maintenance of alleles influencing B4galnt2 expression by natural selection and the GI phenotypes presented here, we suggest that variation in B4galnt2 GI expression may alter susceptibility to GI diseases such as infectious gastroenteritis

Indonesian pharmacists’ and pharmacy students’ attitudes towards collaboration with physicians

Background: Recent implementation of national health coverage and the increasing health burden in Indonesia require health professionals, including pharmacists, to work more collaboratively to improve access and quality of health care. Nevertheless, relatively little is known about Indonesian pharmacists’ attitude towards collaboration. Objective: To assess and compare the attitude of Indonesian pharmacy students and pharmacists towards collaboration with physicians. Methods: A survey of 95 pharmacy students (Universitas Surabaya) and 114 pharmacists (public health facilities in East Java) in Indonesia was conducted using the validated questionnaire, Scale of Attitudes Toward Physician-Pharmacist Collaboration (SATP2C), which was translated in Bahasa Indonesia. The questionnaire contained 16 items which were based on a 4-point Likert scale. Descriptive statistics were used to summarise the responses, (i.e., individual scores, factor scores and total scores). Results: Response rates of 97.9% and 65.8% were reported for students and pharmacists, respectively. The mean total score of SATP2C among Indonesian students and pharmacists were 56.53 versus 56.77, respectively; indicating positive attitudes toward collaboration. Further analysis of each item of SATP2C confirmed the positive attitudes in which mean and median scores of ≥3 were reported for most items in both groups. Significant differences between students and pharmacists were found regarding the following items: (i) ‘there are many overlapping areas of responsibility between pharmacists and physicians’ (3.28 versus 2.89, respectively; p<0.001), (ii) ‘pharmacist should clarify a physician’s order’ (3.54 versus 3.71, respectively; p=0.046); and (iii) ‘physicians should consult with pharmacists about adverse reactions or refractory to drug treatment’ (3.60 versus 3.44, respectively; p=0.022). Conclusions: Indonesian pharmacists reported positive attitudes toward collaboration with physicians. Further research is needed to understand other factors contributing in translating those positive attitudes into actual practice, and thus, providing a good foundation for policy makers, researchers and practitioners to support pharmacist-physician collaboration in Indonesia