Outbreak of encephalitic listeriosis in red-legged partridges (Alectoris rufa)

An outbreak of neurological disease was investigated in red-legged partridges between 8 and 28 days of age. Clinical signs included torticollis, head tilt and incoordination and over an initial eight day period approximately 30–40 fatalities occurred per day. No significant gross post mortem findings were detected. Histopathological examination of the brain and bacterial cultures followed by partial sequencing confirmed a diagnosis of encephalitis due to Listeria monocytogenes. Further isolates were obtained from follow-up carcasses, environmental samples and pooled tissue samples of newly imported day-old chicks prior to placement on farm. These isolates had the same antibiotic resistance pattern as the isolate of the initial post mortem submission and belonged to the same fluorescent amplified fragment length polymorphism (fAFLP) subtype. This suggested that the isolates were very closely related or identical and that the pathogen had entered the farm with the imported day-old chicks, resulting in disease manifestation in partridges between 8 and 28 days of age. Reports of outbreaks of encephalitic listeriosis in avian species are rare and this is to the best of our knowledge the first reported outbreak in red-legged partridges

Psychological determinants of whole-body endurance performance

Background: No literature reviews have systematically identified and evaluated research on the psychological determinants of endurance performance, and sport psychology performance-enhancement guidelines for endurance sports are not founded on a systematic appraisal of endurance-specific research. Objective: A systematic literature review was conducted to identify practical psychological interventions that improve endurance performance and to identify additional psychological factors that affect endurance performance. Additional objectives were to evaluate the research practices of included studies, to suggest theoretical and applied implications, and to guide future research. Methods: Electronic databases, forward-citation searches, and manual searches of reference lists were used to locate relevant studies. Peer-reviewed studies were included when they chose an experimental or quasi-experimental research design, a psychological manipulation, endurance performance as the dependent variable, and athletes or physically-active, healthy adults as participants. Results: Consistent support was found for using imagery, self-talk, and goal setting to improve endurance performance, but it is unclear whether learning multiple psychological skills is more beneficial than learning one psychological skill. The results also demonstrated that mental fatigue undermines endurance performance, and verbal encouragement and head-to-head competition can have a beneficial effect. Interventions that influenced perception of effort consistently affected endurance performance. Conclusions: Psychological skills training could benefit an endurance athlete. Researchers are encouraged to compare different practical psychological interventions, to examine the effects of these interventions for athletes in competition, and to include a placebo control condition or an alternative control treatment. Researchers are also encouraged to explore additional psychological factors that could have a negative effect on endurance performance. Future research should include psychological mediating variables and moderating variables. Implications for theoretical explanations of endurance performance and evidence-based practice are described

Population structure of Streptococcus oralis

Streptococcus oralis is a member of the normal human oral microbiota, capable of opportunistic pathogenicity; like related oral streptococci, it exhibits appreciable phenotypic and genetic variation. A multilocus sequence typing (MLST) scheme for S. oralis was developed and the resultant data analysed to examine the population structure of the species. Analysis of 113 isolates, confirmed as belonging to the S. oralis/mitis group by 16S rRNA gene sequencing, characterized the population as highly diverse and undergoing inter- and intra-species recombination with a probable clonal complex structure. ClonalFrame analysis of these S. oralis isolates along with examples of Streptococcus pneumoniae, Streptococcus mitis and Streptococcus pseudopneumoniae grouped the named species into distinct, coherent populations and did not support the clustering of S. pseudopneumoniae with S. mitis as reported previously using distance-based methods. Analysis of the individual loci suggested that this discrepancy was due to the possible hybrid nature of S. pseudopneumoniae. The data are available on the public MLST website (http://pubmlst.org/soralis/)

Development and Initial Validation of the Endurance Sport Self-efficacy Scale (ESSES)

Self-efficacy is likely to be an important psychological construct for endurance sport performance. Research into the role of self-efficacy, however, is limited as there is currently no validated measure of endurance sport self-efficacy. Consequently, the purpose of the present research was to develop and validate the Endurance Sport Self-Efficacy Scale (ESSES). In Study 1, an initial item pool was developed following a review of the literature. These items were then examined for content validity by an expert panel. In Study 2, the resultant 18 items were subjected to exploratory factor analyses. These analyses provided support for a unidimensional scale comprised of 11 items. Study 2 also provided evidence for the ESSES’s convergent validity. In Study 3, using confirmatory factor analyses, further support was found for the 11-item unidimensional structure. Study 3 also provided evidence for the ESSES’s convergent and concurrent validity. The present findings provide initial evidence that the ESSES is a valid and reliable measure of self-efficacy beliefs in endurance sports

An investigation of health decision-making skills among American Indian adolescents.

The investigation examined the health and social decision-making skills of a sample of 44 seventh-graders (mean age = 12.6 years) of American Indian descent. The students were presented with 10 scenarios describing a young person in the act of making a decision and were required to identify the next step the youth in the scenario should take to make a wise decision. There were no differences in the students\u27 efficacy in making decisions with a health or social focus. However, some interesting differential patterns emerged for making health and social decisions. These findings may be beneficial to school health curriculum specialists, school psychologists, health behavior specialists, and health personnel who interact regularly with American Indian adolescents

Let the Circle be Unbroken helps African-Americans prevent teen pregnancy.

Strategies must be developed to address the high rate of adolescent pregnancy among Blacks in the US and the adverse consequences of premature parenting. A number of programs and strategies have been developed and are being implemented in various sites across the US. The Let the Circle Be Unbroken: Rites of Passage program is an effort to incorporate an Afrocentric conceptual model into a prevention program. It involves adapting socialization processes often observed in African cultures, which openly acknowledge the need to formally help adolescents during their transition from childhood to adulthood. That socialization process tends to be a cultural experience which requires that ideology, education, training, and culture be taught before an activity or celebration marking the successful transition from one stage of development to another. The Rites of Passage approach follows these basic premises to teach adolescents the knowledge and skills needed to become responsible community members and spiritually mature adults. It is specifically designed to help young people build self-esteem; enhance self-image; develop leadership skills, cultural awareness, and appreciation; and make healthy, productive, and self-affirming life choices

An exploratory study of the health decision-making variables of New York and Montana ninth-graders.

The health decision-making dynamics of adolescents in New York and Montana are assessed. Ninth-grade students were asked to make a decision on a hypothetical dilemma scenario. From their choice they were classified as either health-promoting decision makers (HPDM) or health-risky decision makers (HRDM). They were subsequently asked a series of questions dealing with future health choices, degree of reflection, the effect of stress upon choice selection, and type of cognition during decision. Results indicate that HPDM intended not to engage in future, risky sexual behavior or drinking and driving behavior(s). Health-risky decision makers were, however, more reflective in making their initial choice. The variable of stress was not definitive for either group, and significant regional differences were not evident. Implications for the design of school health education program curricula are presented along with suggestions for future investigation

Effects of a preventive alcohol education program after three years

A three-year evaluation of Nebraska students (N = 130) was conducted to gauge the long-term influence of an initial preventive alcohol education intervention. The initial intervention was developed around the inoculation model of McGuire which proposes that individuals can be inoculated against persuasive verbal appeals and thus resist specific pressures. Students in the initial program were assessed and found to be highly susceptible to peer pressure to misuse alcohol. Subjects were followed through their junior year in high school and assessed on the following self-report alcohol-related behaviors: frequency of riding with drinking drivers; frequency of drinking and, frequency of drinking to excess. Cognitive areas assessed included items assessing the concept of tolerance to alcohol. Results suggest that after three years frequency of risky alcohol-related behavior between experimental and control students was not significantly different. Assessments of cognitive items revealed no statistically significant differences between experimental and control students. When viewed in context with prior evaluations of these subjects at two-weeks and six-months time, the findings are disappointing yet informative. The claim that specific \u27educational inoculation\u27 strategies play a long-term role in delaying the initiation of risky health behavior in adolescents is discussed. The judicious integration of periodic, sequential, and meaningful booster components into school-based environments is recommended as a potential way to achieve a more lasting effect in preventive inoculation efforts

Building self-esteem through social skills training and cultural awareness: A community-based approach for preventing violence among African American youth

In West Tennessee, the Juvenile Court Report indicated that African American male youths were six times as likely to be referred on aggravated assault charges, and were taken into protective custody four times as often as their white counterparts. This study aimed to help lessen the likelihood of African American male youths\u27 involvement with the juvenile justice system by: (a) assisting them in developing positive self-esteem; (b) teaching them decision-making and conflict resolution skills; and (c) exposing them to their culture and heritage. A sample of 122 African American male students were drawn from public schools in West Tennessee. The Stephan-Rosenfield Racial Attitude Scale and Banks Attitude Scale were used to assess students\u27 level of self-esteem. Findings revealed that the mean scores on participants\u27 concept of their physical characteristics and ethnic identity improved at post-program, whereas attitudes toward their neighborhood and school did not. Only students within the age range 10-11 years showed an improvement in their mean scores for physical self-concept and attitude towards African Americans relative to those in 8-9 and 12-14 age categories. Lessons learned and implications for violence prevention programs for at-risk populations are discussed

Age of onset, periods of risk, and patterns of progression in drug use among american indian high school students

A sample of 277 Native American students (grades 7 to 12) was surveyed to examine the age of onset, patterns of progression, and periods of risk for drug use. Results suggest that Native American youth begin smoking cigarettes and marijuana, drinking, sniffing solvents, and using cocaine as early as 10 years of age. The period of risk for initiation of drug use was between the ages of 10 and 13 years. Implications for drug use prevention-education programming are presented. © 1987 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted