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https://www.selleckchem.com/products/ck-586.html We quantitatively demonstrate discrete spatiotemporal patterns in airborne grass pollen assemblages. Using a series of generalized additive models (GAMs), we explore the relationship between the incidences of airborne pollen and severe asthma exacerbations (sub-weekly) and prescribing rates of drugs for respiratory allergies (monthly). Our results indicate that a subset of grass species may have disproportionate influence on these population-scale respiratory health responses during peak grass pollen concentrations. The work demonstrates the need for sensitive and detailed biomonitoring of harmful aeroallergens in order to investigate and mitigate their impacts on human health.Genetic mutants have demonstrated the importance of homologous recombination (HR) to fluoroquinolone (FQ) persistence, which suggests that single-cell chromosome (Chr) abundance might be a phenotypic variable of importance to persisters. Here, we sorted stationary-phase E. coli based on ploidy and subjected the subpopulations to tolerance assays. Subpopulations sorted to contain diploid cells harbored up to ∼40-fold more FQ persisters than those sorted to contain monoploid cells. This association was observed with distinct FQs, in independent environmental conditions, and with more than one strain of E. coli (MG1655; uropathogenic CFT073) but was abolished in HR-deficient strains (ΔrecA and ΔrecB). It was observed that the persister level of monoploid subpopulations exceeded those of ΔrecA and ΔrecB by 10-fold or more, and subsequent high-purity sorting confirmed that observation. Those data suggested the existence of distinct FQ persister subtypes those that are and are not proficient with HR. Time-lapse microscopy revealed significant differences in initial size and growth dynamics during the post-antibiotic recovery period for persisters from monoploid- and diploid-enriched subpopulations. In addition, non-persisters in monoploid-enriched sub

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