Glyphosate effects on growth and biofilm formation in bee gut symbionts and diverse associated bacteria.

Biofilm formation is a common adaptation enabling bacteria to thrive in various environments and withstand external pressures. In the context of host-microbe interactions, biofilms play vital roles in establishing microbiomes associated with animals and plants and are used by opportunistic microbes to facilitate survival within hosts. Investigating biofilm dynamics, composition, and responses to environmental stressors is crucial for understanding microbial community assembly and biofilm regulation in health and disease. In this study, we explore in vivo colonization and in vitro biofilm formation abilities of core members of the honey bee (Apis mellifera) gut microbiota. Additionally, we assess the impact of glyphosate, a widely used herbicide with antimicrobial properties, and a glyphosate-based herbicide formulation on growth and biofilm formation in bee gut symbionts as well as in other biofilm-forming bacteria associated with diverse animals and plants. Our results demonstrate that several strains of core bee gut bacterial species can colonize the bee gut, which probably depends on their ability to form biofilms. Furthermore, glyphosate exposure elicits variable effects on bacterial growth and biofilm formation. In some instances, the effects correlate with the bacteria's ability to encode a susceptible or tolerant version of the enzyme inhibited by glyphosate in the shikimate pathway. However, in other instances, no such correlation is observed. Testing the herbicide formulation further complicates comparisons, as results often diverge from glyphosate exposure alone, suggesting that co-formulants influence bacterial growth and biofilm formation. These findings highlight the nuanced impacts of environmental stressors on microbial biofilms, with both ecological and host health-related implications. IMPORTANCE: Biofilms are essential for microbial communities to establish and thrive in diverse environments. In the honey bee gut, the core microbiota member Snodgrassella alvi forms biofilms, potentially aiding the establishment of other members and promoting interactions with the host. In this study, we show that specific strains of other core members, including Bifidobacterium, Bombilactobacillus, Gilliamella, and Lactobacillus, also form biofilms in vitro. We then examine the impact of glyphosate, a widely used herbicide that can disrupt the bee microbiota, on bacterial growth and biofilm formation. Our findings demonstrate the diverse effects of glyphosate on biofilm formation, ranging from inhibition to enhancement, reflecting observations in other beneficial or pathogenic bacteria associated with animals and plants. Thus, glyphosate exposure may influence bacterial growth and biofilm formation, potentially shaping microbial establishment on host surfaces and impacting health outcomes.

Characteristics Associated With Recurrent Urinary Tract Infections: A Case-Control Study.

IMPORTANCE: Recurrent urinary tract infections (rUTIs) affect 2-10% of adult women and are associated with a significant effect on quality of life, daily activities, and mental health. OBJECTIVE: The aim of this study was to identify clinical characteristics associated with rUTIs among women seeking care for pelvic floor disorders at an academic tertiary urogynecology clinic. STUDY DESIGN: A retrospective case-control study of women presenting to an academic tertiary urogynecology clinic was conducted. Cases were women with rUTIs, defined as ≥2 UTIs in 6 months or ≥3 within 1 year. Controls were women with no culture documented UTIs. Cases were matched 2:1 to controls by age and body mass index. Demographic and clinical characteristics were compared between cases and controls, and bivariate characteristics with P values ≤0.2 were assessed for an independent association with rUTIs by multivariable logistic regression. RESULTS: A total of 285 cases with rUTIs were identified, and 150 matched controls had a mean (SD) age of 72 (11.8) years and a body mass index of 29.6 (6.7; calculated as weight in kilograms divided by height in meters squared). Multivariable analysis revealed that prolapse beyond the introitus (odds ratio [OR], 0.28; 95% confidence interval [CI], 0.13-0.60), parity (OR, 1.33; 95% CI, 1.08-1.64), Charlson Comorbidity Index (OR, 1.66; 95% CI, 1.37-2.03), and postvoid residual volume ≥100 mL (OR, 4.05; 95% CI, 2.01, 8.18) were associated with rUTIs. CONCLUSIONS: In this ambulatory urogynecologic population, prolapse through the introitus was negatively associated with rUTIs, whereas parity, increased medical comorbidities, and elevated postvoid residual volume were positively associated with rUTI. Future research should seek an increased understanding of these factors associated with rUTI to implement effective preventive strategies.

Soil microbial community response to ectomycorrhizal dominance in diverse neotropical montane forests.

Ectomycorrhizal (EM) associations can promote the dominance of tree species in otherwise diverse tropical forests. These EM associations between trees and their fungal mutualists have important consequences for soil organic matter cycling, yet the influence of these EM-associated effects on surrounding microbial communities is not well known, particularly in neotropical forests. We examined fungal and prokaryotic community composition in surface soil samples from mixed arbuscular mycorrhizal (AM) and ectomycorrhizal (EM) stands as well as stands dominated by EM-associated Oreomunnea mexicana (Juglandaceae) in four watersheds differing in soil fertility in the Fortuna Forest Reserve, Panama. We hypothesized that EM-dominated stands would support distinct microbial community assemblages relative to the mixed AM-EM stands due to differences in carbon and nitrogen cycling associated with the dominance of EM trees. We expected that this microbiome selection in EM-dominated stands would lead to lower overall microbial community diversity and turnover, with tighter correspondence between general fungal and prokaryotic communities. We measured fungal and prokaryotic community composition via high-throughput Illumina sequencing of the ITS2 (fungi) and 16S rRNA (prokaryotic) gene regions. We analyzed differences in alpha and beta diversity between forest stands associated with different mycorrhizal types, as well as the relative abundance of fungal functional groups and various microbial taxa. We found that fungal and prokaryotic community composition differed based on stand mycorrhizal type. There was lower prokaryotic diversity and lower relative abundance of fungal saprotrophs and pathogens in EM-dominated than AM-EM mixed stands. However, contrary to our prediction, there was lower homogeneity for fungal communities in EM-dominated stands compared to mixed AM-EM stands. Overall, we demonstrate that EM-dominated tropical forest stands have distinct soil microbiomes relative to surrounding diverse forests, suggesting that EM fungi may filter microbial functional groups in ways that could potentially influence plant performance or ecosystem function.

The RUMERTIME Process as a Protective Factor in School Attendance Problems.

The RUMERTIME Process (RP) is a five-step culturally responsive social-emotional, problem-solving, prevention-intervention strategy used to educate, equip, and empower students, educators, and families. The RP equips individuals with the abilities to recognize, understand, manage, express, and reflect on their thoughts, interactions, mindsets, and emotions (RUMERTIME) in relation to themselves, others, and the daily life challenges they face within multiple systems and settings. The RP is embedded within the Cultivating SEEDS System framework (CSS) and is utilized to equip culturally diverse communities, inclusive of students, family members, educators, and administrators, with the social-emotional skills to effectively solve student attendance problems (SAPs). The data shared in this practice intervention article are descriptive in nature and highlight the RP as a protective factor and explain its three goals. The paper consists of three parts: (a) introduction of the RP, which is embedded in the CSS framework; (b) description of implementation of the RP as integral to the Daytime Intervention Room (DIR) program; and (c) discussion of risk factors that qualified students to receive services through the DIR program as well as data that demonstrated how the RP performed as a protective factor. The DIR program was aimed at creating an alternative to out-of-school suspension (OSS) and the traditional punitive in-school suspension (ISS). The program was established in each of the four schools in an urban high-needs school district in the midwest region of the United States. The DIR program was intentionally designed to include multiple levels, stakeholders, and delivery support, thus creating a solid base for the holistic development of students, educators, and parents. In conjunction with the CSS framework, the DIR program sought to increase academic performance, decrease the number of behavior referrals, and improve attendance rates in this high-needs urban school district.