We provide an updated checklist and key to the 30 Poa species with open panicles from Peru which includes previously circumscribed Dissanthelium and Aphanelytrum species, new taxon records, and three undescribed species. Poa compressa, Poa grisebachii, and Poa leioclada are recorded from Peru for the first time. A number of species are placed in synonymy: Poa carazensis, Poa ferreyrae and Poa t...

A revision and key to the 23 species and eight subspecies of Poa (including Dissanthelium) known to occur in Mexico is provided. All voucher specimens seen are cited for accepted taxa, except Poa annua for which one voucher per state is provided. Taxa not previously known from, or poorly understood in, Mexico are discussed.Poa palmerisp. nov. is endemic to forested slopes of the Sierra Madre Or...

Poa, the largest genus of grasses (Poaceae) with over 500 species, occurs throughout temperate and boreal regions in both hemispheres. A phylogenetic study of Poa based on trnT–trnF chloroplast DNA sequence data is presented focusing on basal relationships, major clades, generic boundaries, and placement of putatively closely related genera. Results support the monophyly of the main lineage of ...

Background. The aim of this study was to compare hospital-onset (Non-POA) CDI discharges to community-onset (POA) CDI discharges in order to assess the healthcare burden of hospital acquired CDI. Methods. A retrospective chart review of patients diagnosed with CDI was conducted at a tertiary-care hospital in Detroit between January 2011 and December 2012. CDI Patients were classified as present...

In this study the peculiar Andean grass genus Aphanelytrum, with two species, is reduced to Poa subsect. Aphanelytrum comb. & stat. nov. A third species, Festuca reclinata, is assigned to the subsection, which shows states transitional between a more typical Poa and Aphanelytrum. Poa subgen. Poa supersect. Homalopoa sect. Dioicopoa subsect. Aphanelytrum comb. & stat. nov. is characterized in ha...

The natural resistance of Escherichia coli to pyrazinoic acid (POA), the active derivative of pyrazinamide, was investigated. The TolC mutant was found to be more susceptible to POA and other weak acids than the wild-type strain. Mutation in EmrB but not AcrB efflux protein slightly increased POA susceptibility. Two transposon mutants with increased susceptibility to POA were found to harbor mu...

BACKGROUND Prescription opioid analgesic (POA) utilization has steeply increased globally, yet is far higher in established market economies than elsewhere. Canada features the world's second-highest POA consumption rates. Following increases in POA-related harm, several POA control interventions have been implemented since 2010. METHODS We examined trends and patterns in POA dispensing in Ca...

OBJECTIVE To evaluate how the accuracy of present-on-admission (POA) reporting affects hospital 30-day acute myocardial infarction (AMI) mortality assessments. DATA SOURCES A total of 2005 California patient discharge data (PDD) and vital statistics death files. STUDY DESIGN We compared hospital performance rankings using an established model assessing hospital performance for AMI with (1) ...

In this column, we continue our presentation of the new OMG Portable Object Adapter (POA) [1]. The POA was adopted by the OMG in mid-1997 as a replacement for the Basic Object Adapter (BOA), which was the original CORBA object adapter. As we described in our last column, the BOA was a major source of portability problems for CORBA applications due to its imprecise specification. Serious users o...

I have read with great interest the paper recently published in your journal by Uchino et al. [5] describing the persistent primitive olfactory artery (POA). In the anatomical paper on cerebral arteries, two important points are required. One is description of the detailed arterial anatomy (static anatomy). In this sense, new information of the incidence of the POA being 0.14% and no laterality...