These data indicate that infection with CagA(+) H. pylori strains significantly lowers the gastric juice vitamin C levels in comparison with CagA(-) H. pylori strains, which might have a significant impact on gastric carcinogenesis.

The study of policy entrepreneurs as agents of change has developed greatly in recent years, supported by increasingly more sophisticated theoretical and empirical research. In this article, we first consider how the concept of the policy entrepreneur can be integrated into broader theories of the policy process, with particular focus on the compatibility of the concept with the narrative policy framework. We then propose that further empirical research on policy entrepreneurs focus on five tasks: (i) delimiting policy entrepreneurs as a distinct class of actor; (ii) investigating contextual factors that encourage the emergence of policy entrepreneurs; (iii) further specifying the strategies policy entrepreneurs deploy; (iv) improving the measurement of the impact policy entrepreneurs have in the policy process; and (v) identifying when policy entrepreneurs prompt widescale change. New theoretical and empirical contributions along these lines could do much to advance our understanding of agency and structure in contemporary politics.

The object of policy research is the understanding of the interaction among the machinery of the state, political actors, and the public. To facilitate this understanding, a number of complementary theories have developed in the course of more than two decades. This article reviews recent scholarship on the established theories of the policy process, mostly published in 2011 and 2012. Additionally, scholarship extending these theories is identified and new theories of policy process are discussed. This review finds that the established theories have generated substantive scholarship during the period under review and have also been the springboard for much of the recent thinking in policy research.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

In this article, we focus on political accountability by comparing the Greek and Turkish national responses to the COVID-19 crisis. The study is underpinned by the assumption that the overarching objective of all leaders is re-election (Mayhew, 2004). Policymakers' failure to tackle the crisis may not only have devastating consequences for the lives and well-being of citizens, but also for their prospects for re-election (Boin, 't Hart, Stern, & Sundelius, 2017; Brändström, 2016). Conversely, success involves making decisions that accomplish political goals, minimize loss of life and/or property, and attract "near universal" support (McConnell, 2011, 68). We employ the classification of strategiesagency, presentational, and policy-developed by Hood (2011) to understand how and why governments avoid blame and take credit. Rather than uncovering causal relationships, the aim of our two-country comparison contrasts contexts in order to understand how crisis accountability played out in each context. This interpretive

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Oropharyngeal swabs were cultured from 554 children aged 2-19 years attending nurseries, primary schools and secondary schools in the central Athens area. A questionnaire was completed to identify risk factors for carriage. Susceptibility to antimicrobial agents was determined by Etest. The genetic relatedness of the strains was examined by pulsed-field gel electrophoresis (PFGE), and isolate serogrouping was performed by slide agglutination. Twenty-two (4%) children were carriers of Neisseria meningitidis; seven isolates belonged to serogroup C, and five to serogroup B. One isolate was resistant to co-trimoxazole, and five showed intermediate resistance to penicillin. DNA analysis of 16 isolates revealed six distinct PFGE patterns. Clusters with indistinguishable PFGE patterns were noted in the same school. More than one serogroup was included in the same clonal group. On multivariate logistic regression analysis, only age > 12 years remained independently associated with the carrier state (odds ratio, 7.96; 95% CI, 2.24-28.33; p < 0.001). Overall, the N. meningitidis carriage rate among Greek schoolchildren increased with age, and the predominant serogroups in the Athens region were groups C and B. These findings may have important implications for future immunisation strategies with conjugate vaccines.

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