Population structure of Helicobacter pylori among ethnic groups in Malaysia: recent acquisition of the bacterium by the Malay population

<p>Abstract</p> <p>Background</p> <p><it>Helicobacter pylori </it>is a major gastric bacterial pathogen. This pathogen has been shown to follow the routes of human migration by their geographical origin and currently the global <it>H. pylori </it>population has been divided into six ancestral populations, three from Africa, two from Asia and one from Europe. Malaysia is made up of three major ethnic populations, Malay, Chinese and Indian, providing a good population for studying recent <it>H. pylori </it>migration and admixture.</p> <p>Results</p> <p>Seventy eight <it>H. pylori </it>isolates, including 27 Chinese, 35 Indian and 16 Malay isolates from Malaysia were analysed by multilocus sequence typing (MLST) of seven housekeeping genes and compared with the global MLST data. STRUCTURE analysis assigned the isolates to previously identified <it>H. pylori </it>ancestral populations, hpEastAsia, hpAsia2 and hpEurope, and revealed a new subpopulation, hspIndia, within hpAsia2. Statistical analysis allowed us to identify population segregation sites that divide the <it>H. pylori </it>populations and the subpopulations. The majority of Malay isolates were found to be grouped together with Indian isolates.</p> <p>Conclusion</p> <p>The majority of the Malay and Indian <it>H. pylori </it>isolates share the same origin while the Malaysian Chinese <it>H. pylori </it>is distinctive. The Malay population, known to have a low infection rate of <it>H. pylori</it>, was likely to be initially <it>H. pylori </it>free and gained the pathogen only recently from cross infection from other populations.</p

Comparative analyses of Campylobacter concisusstrains reveal the genome of the reference strain BAA-1457 is not representative of the species

<p>Abstract</p> <p>Background</p> <p>Several studies have shown that significant genotypic heterogeneity exists among <it>Campylobacter concisus </it>strains. Recently, the genome of <it>C. concisus </it>UNSWCD, isolated from a patient with Crohn's disease, was sequenced.</p> <p>Results</p> <p>In this study, comparative analyses were performed between strain UNSWCD and BAA-1457, isolated from a patient with acute gastroenteritis. Searches between <it>C. concisus </it>UNSWCD and BAA-1457 showed that 76% of genes were homologues, whereas those between <it>C. jejuni </it>strains showed 90-91% to be homologues, indicating substantial variation exists within these two <it>C. concisus </it>genomes. More specific bidirectional homology searches identified 1593 genes that are shared between these strains, and 115 and 281 genes unique to UNSWCD and BAA-1457, respectively. Significantly, differences in the type of flagellin glycosylation pathways between the two strains were identified and confirmed by PCR. The protein profiles of UNSWCD, BAA-1457 and a further six strains of <it>C. concisus </it>were compared and analyzed bioinformatically, and this differentiated the strains into four clades. BAA-1457 was found to be highly divergent (average similarity: 56.8%) from the other seven strains (mean average similarity ± standard deviation: 64.7 ± 1.7%). Furthermore, searches for homologues of the 1593 proteins found to be common between UNSWCD and BAA-1457 were conducted against all available bacterial genomes, and 18 proteins were found to be unique to <it>C. concisus</it>, of which 6 were predicted to be secreted, and may represent good markers for detection of this species.</p> <p>Conclusions</p> <p>This study has elucidated several features that may be responsible for the heterogeneity that exists among <it>C. concisus </it>strains, and has determined that the strain BAA-1457 is genetically atypical to other <it>C. concisus </it>strains and is not a good candidate reference strain.</p

A qualitative exploration of the relevance of training provision in planning for implementation of managed alcohol programs within a third sector setting

Background: Managed Alcohol Programs (MAPs) are a harm reduction strategy for people experiencing homelessness and alcohol dependence. Despite a growing evidence base, resistance to MAPs is apparent due to limited knowledge of alcohol harm reduction and the cultural preference for abstinence-based approaches. To address this, service managers working in a not-for-profit organization in Scotland designed and delivered a program of alcohol-specific staff training as part of a larger study exploring the potential implementation of MAPs during the COVID-19 pandemic. Methods: Semi-structured interviews were conducted with 15 service managers and staff regarding their experiences of the training provided. Data were analyzed using Framework Analysis, and Lewin’s model of organizational change was applied to the findings to gain deeper theoretical insight into data relating to staff knowledge, training, and organizational change. Findings: Participants described increased knowledge about alcohol harm reduction and MAPs, as well as increased opportunities for conversations around cultural change. Findings highlight individual- and organizational-level change is required when implementing novel harm reduction interventions like MAPs. Conclusion: The findings have implications for the future implementation of MAPs in homelessness settings. Training can promote staff buy-in, facilitate the involvement of staff within the planning process, and change organizational culture.</p

Chronicles of Oklahoma

Notes and Documents, Chronicles of Oklahoma, Volume 35, Number 3, Fall 1957. It includes documents about new publications, a map of Oklahoma Territory, history of Oklahoma emblems, corrections for The Chronicles articles, a history of Keystone in Pawnee County, and a list of recent accessions to Oklahoma Historical Society

Prevalence of Campylobacter Species in Adult Crohn's Disease and the Preferential Colonization Sites of Campylobacter Species in the Human Intestine

INTRODUCTION: Crohn's disease (CD) and ulcerative colitis (UC) are the two major forms of inflammatory bowel disease (IBD). A high prevalence of Campylobacter concisus was previously detected in paediatric CD and adult UC. Currently, the prevalence of C. concisus in adult CD and the preferential colonization sites of Campylobacter species in the human intestine are unknown. In this study, we examined the prevalence of Campylobacter species in biopsies collected from multiple anatomic sites of adult patients with IBD and controls. METHODS: Three hundred and one biopsies collected from ileum, caecum, descending colon and rectum of 28 patients IBD (15 CD and 13 UC) and 33 controls were studied. Biopsies were used for DNA extraction and detection of Campylobacter species by PCR-sequencing and Campylobacter cultivation. RESULTS: A significantly higher prevalence of C. concisus in colonic biopsies of patients with CD (53%) was detected as compared with the controls (18%). Campylobacter genus-PCR positivity and C. concisus positivity in patients with UC were 85% and 77% respectively, being significantly higher than that in the controls (48% and 36%). C. concisus was more often detected in descending colonic and rectal biopsies from patients with IBD in comparison to the controls. C. concisus was isolated from patients with IBD. CONCLUSION: The high intestinal prevalence of C. concisus in patients with IBD, particularly in the proximal large intestine, suggests that future studies are needed to investigate the possible involvement of C. concisus in a subgroup of human IBD. To our knowledge, this is the first report of the association between adult CD and C. concisus as well as the first study of the preferential colonization sites of C. concisus in the human intestine

The prevalence of the duodenal ulcer promoting gene (dupA) in Helicobacter pylori isolates varies by ethnic group and is not universally associated with disease development: a case-control study

<p>Abstract</p> <p>Background</p> <p>The putative <it>H. pylori </it>pathogenicity-associated factor <it>dupA </it>has been associated with IL-8 induction <it>in vitro</it>, and duodenal ulcer (DU) and gastric cancer (GC) development in certain populations, but this association is inconsistent between studies. We aimed to investigate <it>dupA </it>prevalence in clinical isolates from Sweden, Australia and from ethnic Chinese, Indians and Malays resident in Malaysia and Singapore and to examine the association with DU and GC. In addition we investigated the sequence diversity between isolates from these diverse groups and compared the level of IL-8 secretion in isolates possessing and lacking <it>dupA</it>.</p> <p>Methods</p> <p>PCR primers were designed to amplify over the C/T insertion denoting a continuous <it>dupA</it>. PCR products from 29 clinical isolates were sequenced and compared with sequences from three additional strains obtained from GenBank. Clinical isolates from 21 Malaysian patients (8 <it>dupA</it>-positive, 14 <it>dupA</it>-negative) were assessed for their ability to induce IL-8 in AGS cells <it>in vitro</it>. Statistical analysis was performed using Fisher's exact test.</p> <p>Results</p> <p>The prevalence of <it>dupA </it>in isolates from Swedish functional dyspepsia (FD) control patients (65%, 13/20) was higher and in isolates from Indian FD patients (7.1%, 3/42) was lower as compared with isolates from Chinese (28.9%, 13/49, P = 0.005, P = 0.025), Malay (35.7%, 5/14, P = 0.16, P = 0.018) and Australian (37.8%, 17/45, P = 0.060, P < 0.001) FD patients. <it>dupA </it>was associated with DU and GC development in Chinese with 62.5% (10/16) and 54.6% (12/22) of isolates possessing <it>dupA </it>respectively as compared with FD controls (28.9%) (P = 0.015, P = 0.032). No significant difference in prevalence of <it>dupA </it>between FD controls, DU (63.6%, 7/11) and GC (61.9%, 13/21) cases (P = 1.000) was observed in the Swedish population. Sequence analysis revealed a pairwise variation of 1.9% and all isolates possessed the C/T insertion. The average IL-8 induction was 1330 pg/mL for <it>dupA</it>-positive isolates and 1378 pg/mL for <it>dupA</it>-negative isolates.</p> <p>Conclusion</p> <p>Although <it>dupA </it>is highly conserved when present, we identified no consistent association between <it>dupA </it>and DU or GC development across the ethnic groups investigated, with the <it>dupA </it>prevalence in control groups varying significantly. Our results would suggest that in the clinical isolates investigated <it>dupA </it>is not associated with IL-8 induction <it>in vitro</it>.</p

Chronicles of Oklahoma

Notes and Documents, Chronicles of Oklahoma, Volume 32, Number 3, Fall 1954. It includes documents about Oklahoma Historical Society tours, corrections for "General Douglas H. Cooper, C. S. A.," answers for questions about Bloomfield Seminary, and a list of recent accessions in the Oklahoma Historical Society

A qualitative exploration of the relevance of training provision in planning for implementation of managed alcohol programs within a third sector setting

Background: Managed Alcohol Programs (MAPs) are a harm reduction strategy for people experiencing homelessness and alcohol dependence. Despite a growing evidence base, resistance to MAPs is apparent due to limited knowledge of alcohol harm reduction and the cultural preference for abstinence-based approaches. To address this, service managers working in a not-for-profit organization in Scotland designed and delivered a program of alcohol-specific staff training as part of a larger study exploring the potential implementation of MAPs during the COVID-19 pandemic. Methods: semi-structured interviews were conducted with 15 service managers and staff regarding their experiences of the training provided. Data were analyzed using Framework analysis, and Lewin's model of organizational change was applied to the findings to gain deeper theoretical insight into data relating to staff knowledge, training, and organizational change. Findings: participants described increased knowledge about alcohol harm reduction and MAPs, as well as increased opportunities for conversations around cultural change. Findings highlight individual-and organizational-level change is required when implementing novel harm reduction interventions like MAPs. Conclusion: the findings have implications for the future implementation of MAPs in homelessness settings. training can promote staff buy-in, facilitate the involvement of staff within the planning process, and change organizational culture