A Closer Look at Phonology as a Predictor of Spoken Sentence Processing and Word Reading.

The goal of this study was to tease apart the roles of phonological awareness (pA) and phonological short-term memory (pSTM) in sentence comprehension, sentence production, and word reading. Children 6- to 10-years of age (N = 377) completed standardized tests of pA ('Elision') and pSTM ('Nonword Repetition') from the Comprehensive Test of Phonological Processing. Concepts and Following Directions (CFD) and Formulated Sentences (FS) were taken from the Clinical Evaluation of Language Fundamentals-Fourth Edition, as measures of sentence comprehension and production, respectively. Children also completed the Word Identification (Word Id) and Word Attack (Word Att) subtests of the Woodcock Reading Mastery Test-Third Edition. Hierarchical multiple regression analyses controlling for age and nonverbal IQ revealed that Elision was the only significant predictor of CFD and FS. While Elision was the strongest predictor of Word Id and Word Att, Nonword Repetition accounted for additional variance in both reading measures. These results emphasize the usefulness of breaking down phonological processing into multiple components and they also have implications language and reading disordered populations.

Pathogenesis of coxsackievirus-B5 acquired from intra-renal porcine islet cell xenografts in diabetic mice.

BACKGROUND: We previously demonstrated the ability of a human isolate of coxsackievirus-B5 (CVB5) to infect productively adult porcine islet cells (PICs) in vitro. PICs infected with CVB5 remain viable, and upon transplantation reversed diabetes in C56BL/6 mice for up to 5 days. METHODS: In the present work, we expanded this graft-to-host xenozoonosis model by examining the long-term functionality of CVB5-infected PIC xenografts in immunosuppressed mice. And, we characterized the pathogenesis of CVB5 infection in mice resulting from directional transmission of the virus from PIC xenografts to surrounding tissues in a mouse model for immunosuppressed human PIC xenograft recipients. RESULTS: Both acutely (12 h) and chronically (72 h) infected PIC xenografts functioned in vivo to reverse diabetes in mice. The efficacy of both infected and un-infected PICs was transient beyond 5 days post-inoculation and the long-term functionality of the grafts was compromised by host-to-graft rejection. CVB5-infected PIC xenografts transmitted infectious virus to immunosuppressed recipient mice resulting in extensive histopathologic changes. The virus replicated in the heart, liver, spleen, kidney, pancreas, brain and skeletal muscle in higher levels in severe-combined immunodeficient (SCID) mice that were directly inoculated with virus when compared to controls. In addition, infectious virus was recovered for up to 22 days after inoculation in SCID mice whereas it was only detected up to Day 4 PI in non-SCID mice. CONCLUSIONS: Immunosuppressed PIC xenograft recipients may be more susceptible to infection with CVB5 which could target the xenograft leading to disseminated infection in the host.

Brachyspira intermedia and Brachyspira pilosicoli are commonly found in older laying flocks in Pennsylvania.

Anaerobic intestinal spirochetes (genus Brachyspira) include several species that are recognized as pathogens of poultry. Surveys undertaken in Europe and Australia have shown that layer and breeder flocks are often colonized by the pathogenic species Brachyspira intermedia and Brachyspira pilosicoli, but similar surveys have not been conducted in the United States. In the current study, DNA was extracted from fecal samples (n=50) collected from each of 21 flocks of laying hens >40 wk of age in Pennsylvania, and this material was tested for B. intermedia and B. pilosicoli using a duplex PCR. Negative samples also were tested using a Brachyspira genus-specific PCR. The consistency of the feces was observed, and manure handling systems and medication histories were recorded. Brachyspira intermedia was detected in 662 (63.1%) samples from 17 (81%) flocks, with a within-flock prevalence of 10%-100%. Brachyspira pilosicoli was detected in 112 (10.7%) samples from 5 flocks (23.8%), with a within-flock prevalence of 8%-82%. Four of the flocks had both pathogenic species present, three had no pathogenic species detected, and two had no Brachyspira species detected. Nine flocks had many fecal samples with a wet appearance and/or a caramel color, and all of these were colonized with one or the other of the two pathogenic species. Nine of 12 flocks with manure that was mainly dry also were colonized. Differences in colonization rates between flocks with or without wet manure were not significant. Colonization with pathogenic Brachyspira species, and particularly B. intermedia, occurs very commonly in layer flocks >40 wk of age in Pennsylvania. The significance of this high rate of colonization requires further investigation.

Mindfulness and human occupation: A scoping review.

BACKGROUND: Mindfulness is an emergent construct with implications for our understanding of approaches to engagement in human occupation. Little is known about how mindfulness is being applied and what its possibilities are in the occupation-based disciplines. OBJECTIVE: The purpose of this scoping review was to summarize, describe, and identify gaps in the existing literature on mindfulness in relation to human occupation. MATERIAL AND METHOD: A scoping review, guided by Arksey and O'Malley's methodological framework was undertaken. The initial search yielded 929 articles; 20 articles met the criteria for inclusion. Articles included peer review and gray literature published in English between 2006-2016. Articles addressed mindfulness in OT or OS and included the terms 'human occupation', 'occupational therapy' and/or 'occupational therapist', and 'mindfulness' and/or 'meditation' or 'yoga'. FINDINGS: The qualitative thematic analysis identified an overarching theme of mindful occupation, with 5 sub-themes including occupational presence; occupational awareness; occupational engagement; occupational well-being; and occupational fulfillment. CONCLUSIONS AND SIGNIFICANCE: The findings have important implications for practice, education, theory and research. Future directions should focus on more depth and breadth of empirical research about mindful engagement in human occupation that can be used to implement and evaluate mindfulness in occupation-based theory and practice.

Characterization of Fusobacterium isolates from the respiratory tract of white-tailed deer (Odocoileus virginianus).

A total of 23 clinical isolates of Fusobacterium spp. were recovered at necropsy over a 2-year period from the respiratory tract of white-tailed deer (Odocoileus virginianus). Isolates were identified as Fusobacterium varium (18/23), Fusobacterium necrophorum subsp. funduliforme (3/23), and Fusobacterium necrophorum subsp. necrophorum (2/23). Using polymerase chain reaction-based detection of virulence genes, all F. necrophorum isolates were positive for the promoter region of the leukotoxin operon and the hemagglutinin-related protein gene, while all F. varium isolates were negative. The presence of the leukotoxin gene in F. necrophorum isolates and the absence of this gene in F. varium isolates were confirmed by Southern hybridization using 2 separate probes. Toxicity to bovine polymorphonuclear leukocytes was observed with all F. necrophorum isolates, but was not observed in any F. varium isolates. Susceptibility to antimicrobials was markedly different for F. varium as compared to F. necrophorum. In summary, no evidence of leukotoxin production was detected in any of the 23 F. varium isolates used in the current study. The data suggests that F. varium, the most common species isolated, may be a significant pathogen in deer with a different virulence mechanism than F. necrophorum.

How closely do institutional review boards follow the common rule?

PURPOSE: To determine how closely institutional review board (IRB) discussions reflect the ethical criteria specified in the Common Rule federal regulations. METHOD: Between November 2006 and July 2009, the authors observed, audio-recorded, transcribed, and coded protocol reviews from 20 IRB meetings at 10 leading academic medical centers. They also reviewed each of the applications discussed to identify the Common Rule criteria-(1) risk minimization, (2) risk/benefit comparison, (3) equitable subject selection, (4) informed consent, (5) data monitoring to ensure safety, (6) privacy protection and confidentiality, and (7) protection of vulnerable subjects-that were both relevant to the study and not adequately addressed in the application. They then determined if the IRB addressed each of the relevant and not-discussed Common Rule criteria in their discussions. RESULTS: IRBs made no mention of many of the Common Rule criteria that required their discussion-In 17/82 (21%) reviews, they failed to address risk minimization; in 52/91 (57%), risk/benefit comparison; in 31/52 (60%), equitable subject selection; in 32/59 (54%), data monitoring; in 13/52 (25%), privacy and confidentiality; and in 7/55 (13%), protection of vulnerable populations. However, they discussed informed consent in 102/104 (98%) reviews and raised questions about, or requested changes about, informed consent for 92/104 (88%) protocols. CONCLUSIONS: These findings suggest that essential elements of human subjects protection are not implemented uniformly across IRBs. Although not directly addressing this issue, the current proposed changes to the Common Rule offer an opportunity to improve, in general, the effectiveness of IRBs to protect human subjects.

The participation of community members on medical institutional review boards.

The goal of this study was to describe the contributions of community members (unaffiliated members) who serve on institutional review boards (IRBs) at large medical research centers and to compare their contributions to those of other IRB members. We observed and audiotaped 17 panel meetings attended by community members and interviewed 15 community members, as well as 152 other members and staff. The authors coded transcripts of the panel meetings and reviewed the interviews of the community members. Community members played a lesser role as designated reviewers than other members. They were infrequently primary reviewers and expressed hesitation about the role. As secondary or tertiary reviewers, they were less active participants than other members in those roles. Community members were more likely to focus on issues related to confidentiality when reviewing an application than other reviewers. When they were not designated reviewers, however, they played a markedly greater role and their discussion focused more on consent disclosures than other reviewers. They did not appear to represent the community so much as to provide a nonscientific view of the protocol and the consent form.

Uncovering beliefs and barriers: staff attitudes related to advance directives.

Although the 1990 Patient Self-determination Act was enacted to insure that patients' wishes regarding advance directives were known and respected, it has had little impact in quality or aggressiveness of care for patients nearing death. The purpose of this descriptive study was to explore staff attitudes related to Advance Directives. A short survey was distributed to 650 hospital, home care, hospice, assisted living, and long term professional and staff members. Analysis was completed on 413 surveys (return rate 63.3%). Findings suggest that although staff members believe that Advance Directives are an important tool, they have found both logistical and process challenges to following them. The results provide needed information for improving processes for completion and utilization of Advance Directives.

A wild-type porcine encephalomyocarditis virus containing a short poly(C) tract is pathogenic to mice, pigs, and cynomolgus macaques.

Previous studies using wild-type Encephalomyocarditis virus (EMCV) and Mengo virus, which have long poly(C) tracts (61 to 146 C's) at the 5' nontranslated region of the genome, and variants of these viruses genetically engineered to truncate or substitute the poly(C) tracts have produced conflicting data on the role of the poly(C) tract in the virulence of these viruses. Analysis of the nucleotide sequence of an EMCV strain isolated from an aborted swine fetus (EMCV 30/87) revealed that the virus had a poly(C) tract that was 7- to 10-fold shorter than the poly(C) tracts of other EMCV strains and 4-fold shorter than that of Mengo virus. Subsequently, we investigated the virulence and pathogenesis of this naturally occurring short-poly(C)-tract-containing virus in rodents, pigs, and nonhuman primates. Infection of C57BL/6 mice, pigs, and cynomolgus macaques resulted in similar EMCV 30/87 pathogenesis, with the heart and brain as the primary sites of infections in all three animals, but with different disease phenotypes. Sixteen percent of EMCV 30/87-infected pigs developed acute fatal cardiac failure, whereas the rest of the pigs were overtly asymptomatic for as long as 90 days postinfection (p.i.), despite extensive myocardial and central nervous system (CNS) pathological changes. In contrast, mice infected with >/==" BORDER="0">4 PFU of EMCV 30/87 developed acute encephalitis that resulted in the death of all animals (n = 25) between days 2 and 7 p.i. EMCV 30/87-infected macaques remained overtly asymptomatic for 45 days, despite extensive myocardial and CNS pathological changes and viral persistence in more than 50% of the animals. The short poly(C) tract in EMCV 30/87 (CUC(5)UC(8)) was comparable to that of strain 2887A/91 (C(10)UCUC(3)UC(10)), another recent porcine isolate.

Prevalent human coxsackie B-5 virus infects porcine islet cells primarily using the coxsackie-adenovirus receptor.

BACKGROUND: We have previously demonstrated that transplanting porcine encephalomyocarditis virus (EMCV)-infected porcine islet cells (PICs) results in transmission of the virus to recipient mice, which is manifested by acute fatal infection within 5 to 8 days. Here, we determined PIC susceptibility to a related and highly prevalent human picornavirus, coxsackie B-5 virus (CVB-5). METHODS: PICs were inoculated with CVB-5 in vitro for up to 96 hours and infectivity, level of virus replication, and cellular function determined. Subsequently, monoclonal and polyclonal antibody blocking experiments were used to investigate the receptor CVB-5 uses to enter PICs, and the ability of CVB-5-infected islets to reverse diabetes analyzed in mice. RESULTS: Adult pig islets inoculated with CVB-5 in vitro showed a typical picornaviral replication cycle with a 2-h lag phase followed by a 4-h exponential phase during which the virus titer increased by 4 logs. However, CVB-5 was less cytolytic to PICs than EMCV, resulting in a persistent productive infection lasting for up to 96 h, with minimal evidence of cell lysis. Double immunostaining confirmed the presence of CVB-5 antigens in insulin-producing islets. Infection of PICs in the presence of antibodies against human coxsackie-adenovirus receptor (CAR) resulted in near complete blockage in production of infectious virus particles whereas blocking with anti-porcine decay-accelerating factor (DAF, also called CD55) or anti-porcine membrane cofactor protein (MCP, also called CD46) only slightly decreased the number of infectious CVB-5 particles produced. Immunofluoresence staining showed CAR and MCP expression on the islet surface, but not DAF. Transplanting CVB-5-infected PICs into diabetic C57BL/6 mice resulted in reversal of diabetes. CONCLUSION: Although PICs are susceptible to human CVB-5, the infection does not appear to affect xenograft function in vitro or in vivo in the short term.