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The proteasome mediates selective protein degradation and is dynamically regulated in response to proteotoxic challenges. SKN-1A/Nrf1, an endoplasmic reticulum (ER)-associated transcription factor that undergoes N-linked glycosylation, serves as a sensor of proteasome dysfunction and triggers compensatory upregulation of proteasome subunit genes. Here, we show that the PNG-1/NGLY1 peptide:N-glycanase edits the sequence of SKN-1A protein by converting particular N-glycosylated asparagine residues to aspartic acid. Genetically introducing aspartates at these N-glycosylation sites bypasses the requirement for PNG-1/NGLY1, showing that protein sequence editing rather than deglycosylation is key to SKN-1A function. This pathway is required to maintain sufficient proteasome expression and activity, and SKN-1A hyperactivation confers resistance to the proteotoxicity of human amyloid beta peptide. Deglycosylation-dependent protein sequence editing explains how ER-associated and cytosolic isoforms of SKN-1 perform distinct cytoprotective functions corresponding to those of mammalian Nrf1 and Nrf2. Thus, we uncover an unexpected mechanism by which N-linked glycosylation regulates protein function and proteostasis.
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Proteínas de Caenorhabditis elegans/metabolismo , Proteínas de Ligação a DNA/metabolismo , Complexo de Endopeptidases do Proteassoma/metabolismo , Fatores de Transcrição/metabolismo , Sequência de Aminoácidos , Animais , Asparagina/metabolismo , Bortezomib/farmacologia , Sistemas CRISPR-Cas/genética , Caenorhabditis elegans/metabolismo , Proteínas de Caenorhabditis elegans/química , Proteínas de Caenorhabditis elegans/genética , Proteínas de Ligação a DNA/química , Proteínas de Ligação a DNA/genética , Retículo Endoplasmático/metabolismo , Edição de Genes , Regulação da Expressão Gênica/efeitos dos fármacos , Estresse Oxidativo , Complexo de Endopeptidases do Proteassoma/genética , Subunidades Proteicas/química , Subunidades Proteicas/genética , Subunidades Proteicas/metabolismo , Alinhamento de Sequência , Fatores de Transcrição/química , Fatores de Transcrição/genéticaRESUMO
Populations of the Eastern Highlands of Papua New Guinea (EHPNG, area 11,157 km2) lived in relative isolation from the rest of the world until the mid-20th century, and the region contains a wealth of linguistic and cultural diversity. Notably, several populations of EHPNG were devastated by an epidemic prion disease, kuru, which at its peak in the mid-twentieth century led to some villages being almost depleted of adult women. Until now, population genetic analyses to learn about genetic diversity, migration, admixture, and the impact of the kuru epidemic have been restricted to a small number of variants or samples. Here, we present a population genetic analysis of the region based on genome-wide genotype data of 943 individuals from 21 linguistic groups and 68 villages in EHPNG, including 34 villages in the South Fore linguistic group, the group most affected by kuru. We find a striking degree of genetic population structure in the relatively small region (average FST between linguistic groups 0.024). The genetic population structure correlates well with linguistic grouping, with some noticeable exceptions that reflect the clan system of community organization that has historically existed in EHPNG. We also detect the presence of migrant individuals within the EHPNG region and observe a significant excess of females among migrants compared to among non-migrants in areas of high kuru exposure (p = 0.0145, chi-squared test). This likely reflects the continued practice of patrilocality despite documented fears and strains placed on communities as a result of kuru and its associated skew in female incidence.
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Kuru , Príons , Adulto , Feminino , Humanos , Kuru/epidemiologia , Kuru/genética , Kuru/história , Papua Nova Guiné/epidemiologia , Príons/genética , Genótipo , AprendizagemRESUMO
Papua New Guinea (PNG) has introduced laws and policies aimed at protecting women from intimate partner violence. This article examines how men who live in Lae, PNG, have made sense of and reacted to these laws and policies. Two evocative metaphors -'popcorn' and 'blanket' - emerge from our research. For 'popcorn', we see how the reforms created a chain reaction similar to that when popcorn is made. Using this metaphor, we analyse men's responses to the reforms, which range from a perceived threat to their cultural dominance, to fears about their personal problems being made public, to practical limits of the reforms. For 'blanket', we show how laws and policies can act like a blanket to smother men's agency in resolving violence and conflict within their homes and communities. The blanket metaphor further highlights how women's ability to seek support under the new laws are constrained by PNG's male dominated society. Adopting the idea that productive change is sometimes incremental, we argue that reforms focused on creating paradigmatic change through legislation and state policies should not occur at the expense of open-mindedness to partial and incomplete local innovations in reducing intimate partner violence.
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Violência por Parceiro Íntimo , Homens , Humanos , Masculino , Feminino , Papua Nova Guiné , Violência por Parceiro Íntimo/prevenção & controle , ViolênciaRESUMO
A new approach is proposed for lossless raster image compression employing interpolative coding. A new multifunction prediction scheme is presented first. Then, interpolative coding, which has not been applied frequently for image compression, is explained briefly. Its simplification is introduced in regard to the original approach. It is determined that the JPEG LS predictor reduces the information entropy slightly better than the multi-functional approach. Furthermore, the interpolative coding was moderately more efficient than the most frequently used arithmetic coding. Finally, our compression pipeline is compared against JPEG LS, JPEG 2000 in the lossless mode, and PNG using 24 standard grayscale benchmark images. JPEG LS turned out to be the most efficient, followed by JPEG 2000, while our approach using simplified interpolative coding was moderately better than PNG. The implementation of the proposed encoder is extremely simple and can be performed in less than 60 lines of programming code for the coder and 60 lines for the decoder, which is demonstrated in the given pseudocodes.
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OBJECTIVE: Papua New Guinea (PNG) has an emerging tuberculosis (TB) epidemic which has become a national public health priority. In Western Province, there are few data about TB outside Daru and the South Fly District. This study describes the epidemiology of TB diagnosed at Balimo District Hospital (BDH) in the Middle Fly District of Western Province, PNG. METHODS: All patients (n = 1614) diagnosed with TB at BDH from April 2013 to February 2017 were recorded. Incidence of reported new cases was calculated for the combined Balimo Urban and Gogodala Rural local level government areas. Analyses investigated patient demographic and clinical information, differences between pulmonary and extrapulmonary TB patients, and predictors of treatment failure. RESULTS: The average case notification rate (2014-2016) was 727 TB cases per 100 000 people per year. One-quarter of TB cases were in children, and 77.1% of all cases had an extrapulmonary TB diagnosis. There was a 1:1.1 ratio of female to male TB cases. When comparing pulmonary and extrapulmonary TB patients, extrapulmonary TB was more likely in those aged up to 14 years and over 54 years. Extrapulmonary TB was more likely in new patients, and pulmonary TB more likely in previously treated patients. Residence in rural regions was associated with treatment failure. CONCLUSION: There is a high burden of TB in the Balimo region, including a very high proportion of extrapulmonary TB. These factors emphasise the importance of BDH as the primary hospital for TB cases in the Balimo region and the Middle Fly District, and the need for resources and staff to manage both drug-susceptible and drug-resistant TB cases.
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Tuberculose/epidemiologia , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Pessoa de Meia-Idade , Papua Nova Guiné/epidemiologia , Adulto JovemRESUMO
BACKGROUND: This paper examines the impact of the scale-up of malaria rapid diagnostic tests (RDT) on routine clinical diagnosis procedures for febrile illness in primary healthcare settings in Papua New Guinea. METHODS: Repeat, cross-sectional surveys in randomly selected primary healthcare services were conducted. Surveys included passive observation of consecutive febrile case management cases and were completed immediately prior to RDT scale-up (2011) and at 12- (2012) and 60-months (2016) post scale-up. The frequency with which specified diagnostic questions and procedures were observed to occur, with corresponding 95% CIs, was calculated for febrile patients prescribed anti-malarials pre- and post-RDT scale-up and between febrile patients who tested either negative or positive for malaria infection by RDT (post scale-up only). RESULTS: A total of 1809 observations from 120 health facilities were completed across the three survey periods of which 915 (51%) were prescribed an anti-malarial. The mean number of diagnostic questions and procedures asked or performed, leading to anti-malarial prescription, remained consistent pre- and post-RDT scale-up (range 7.4-7.7). However, alterations in diagnostic content were evident with the RDT replacing body temperature as the primary diagnostic procedure performed (observed in 5.3 and 84.4% of cases, respectively, in 2011 vs. 77.9 and 58.2% of cases in 2016). Verbal questioning, especially experience of fever, cough and duration of symptoms, remained the most common feature of a diagnostic examination leading to anti-malarial prescription irrespective of RDT use (observed in 96.1, 86.8 and 84.8% of cases, respectively, in 2011 vs. 97.5, 76.6 and 85.7% of cases in 2016). Diagnostic content did not vary substantially by RDT result. CONCLUSIONS: Rapid diagnostic tests scale-up has led to a reduction in body temperature measurement. Investigations are very limited when malaria infection is ruled out as a cause of febrile illness by RDT.
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Testes Diagnósticos de Rotina/estatística & dados numéricos , Febre/diagnóstico , Malária/diagnóstico , Administração de Caso/estatística & dados numéricos , Estudos Transversais , Febre/parasitologia , Malária/parasitologia , Papua Nova GuinéRESUMO
Producing RTF files from Stata can be difficult and somewhat cryptic. Utilities are introduced to simplify this process; one builds up a table row-by-row, another inserts a PNG image file into an RTF document, and the others start and finish the RTF document.
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BACKGROUND: Although tuberculosis is a major cause of morbidity and mortality worldwide, available funding falls far short of that required for effective control. Economic and spillover consequences of investments in the treatment of tuberculosis are unclear, particularly when steep gradients in the disease and response are linked by population movements, such as that between Papua New Guinea (PNG) and the Australian cross-border region. OBJECTIVE: To undertake an economic evaluation of Australian support for the expansion of basic Directly Observed Treatment, Short Course in the PNG border area of the South Fly from the current level of 14% coverage. METHODS: Both cost-utility analysis and cost-benefit analysis were applied to models that allow for population movement across regions with different characteristics of tuberculosis burden, transmission, and access to treatment. Cost-benefit data were drawn primarily from estimates published by the World Health Organization, and disease transmission data were drawn from a previously published model. RESULTS: Investing $16 million to increase basic Directly Observed Treatment, Short Course coverage in the South Fly generates a net present value of roughly $74 million for Australia (discounted 2005 dollars). The cost per disability-adjusted life-year averted and quality-adjusted life-year saved for PNG is $7 and $4.6, respectively. CONCLUSIONS: Where regions with major disparities in tuberculosis burden and health system resourcing are connected through population movements, investments in tuberculosis control are of mutual benefit, resulting in net health and economic gains on both sides of the border. These findings are likely to inform the case for appropriate investment in tuberculosis control globally.
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Antituberculosos/economia , Análise Custo-Benefício/métodos , Tuberculose/economia , Tuberculose/epidemiologia , Antituberculosos/uso terapêutico , Austrália/epidemiologia , Humanos , Papua Nova Guiné/epidemiologia , Tuberculose/tratamento farmacológicoRESUMO
Leafmining flies (Diptera: Agromyzidae) can be serious economic pests of horticultural crops. Some genera such as Liriomyza are particularly problematic with numerous species, some of which are highly polyphagous (wide host range), which can only be confidently identified morphologically from adult males. In our study, DNA barcoding was employed to establish new locality records of the vegetable leafminer fly, Liriomyza sativae, from the islands of Torres Strait (Queensland, Australia) and the central highlands of Papua New Guinea (PNG). These records represent significant range extensions of this highly invasive plant pest. Specimens of immature leafminers (from leaf mines) were collected over a 5-year period during routine plant health surveys in ethanol or on FTA® filter paper cards, both methods proved effective at preserving and transporting insect DNA under tropical conditions, with FTA cards possessing some additional logistical benefits. Specimens were identified through sequencing two sections of the cytochrome oxidase I gene and the utility of each was assessed for the identification of species and intra-specific genetic lineages. Our study indicates that multiple haplotypes of L. sativae occur in PNG, while a different haplotype is present in the Torres Strait, with genetic regionalization between these areas apart from a single possible instance - one haplotype 'S.7' appears to be common between these two regions - interestingly this has also been the most common haplotype detected in previous studies of invasive L. sativae populations. The DNA barcoding methods employed here not only identified multiple introductions of L. sativae, but also appear generally applicable to the identification of other agromyzid leafminers (Phytomyzinae and Agromyzinae) and should decrease the likelihood of potentially co-amplifying internal hymenopteran parasitoids. Currently, L. sativae is still not recorded from the Australian mainland; however, further sampling of leafminer flies from Northern Australia and surrounding areas is required, as surveillance for possible Liriomyza incursions, as well as to characterize endemic species with which Liriomyza species might be confused.
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DNA/genética , Dípteros/genética , Espécies Introduzidas , Animais , Dípteros/fisiologia , Larva/genética , Larva/fisiologia , Masculino , Papua Nova Guiné , QueenslandRESUMO
SETTING: Madang Province is located on the northern coast of Papua New Guinea (PNG), a critical mixing point between the populous highlands and more remote regions. Madang Province faces challenges with limited capacity to diagnose and treat TB. OBJECTIVE: To describe the TB caseload and investigate factors associated with known unfavourable treatment outcomes. DESIGN: This is a retrospective cohort study using routinely collected TB programmatic data for treatments commenced 1 January 2019 to 31 December 2021. Using multivariable logistic regression, factors associated with known unfavourable treatment outcomes-death, failure after treatment, and loss to follow-up (LTFU)-were evaluated. RESULTS: Of the 4,668 registered and treated, 3,755 had an evaluated outcome, and 33% had unfavourable outcomes, most commonly LTFU (23%). Unfavourable treatment outcomes were significantly associated with HIV-untested (aOR 2.82 compared to HIV-negative; 95% CI 2.39-3.33), having drug-resistant TB (aOR 3.26 compared to drug-susceptible TB, 95% CI 1.18-9.00), and travel time to the health facility 1-<3 hours by foot (aOR 3.53 compared to <1 hour by foot; 95% CI 1.04-12.06). CONCLUSION: High LTFU from TB treatment was associated with factors that indicate barriers to access to care and treatment completion. Decentralisation and strengthening of TB services for improved person-centred care and treatment support are urgently required in Madang Province.
CADRE: La province de Madang est située sur la côte nord de la Papouasie-Nouvelle-Guinée (PNG), un point de mélange essentiel entre les hauts plateaux peuplés et les régions plus éloignées. La province de Madang est confrontée à des défis avec des capacités limitées pour diagnostiquer et traiter la TB. OBJECTIF: Décrire le nombre de cas de TB et enquêter sur les facteurs associés aux résultats défavorables connus du traitement. METHODE: Il s'agit d'une étude de cohorte rétrospective utilisant des données programmatiques de lutte contre la TB collectées en routine pour les traitements commencés du 1er janvier 2019 au 31 décembre 2021. À l'aide d'une régression logistique multivariée, les facteurs associés aux résultats défavorables connus du traitement (décès, échec après le traitement et perte de suivi [LTFU, pour l'anglais « loss to follow-up ¼) ont été évalués. RÉSULTATS: Sur les 4668 personnes enregistrées et traitées, 3755 ont eu un résultat évalué et 33% ont eu des résultats défavorables, le plus souvent des LTFU (23%). Les résultats défavorables du traitement étaient significativement associés au fait que les personnes n'ayant pas fait l'objet d'un test de dépistage du VIH (OR ajusté [ORa] 2,82 par rapport aux personnes séronégatives ; IC à 95% 2,393,33), ayant une TB pharmacorésistante (ORa 3,26 par rapport à la TB sensible aux médicaments, IC à 95% 1,189,00) et le temps de déplacement jusqu'à l'établissement de santé étant de 1 à <3 h à pied (ORa 3,53 contre <1 h à pied ; IC à 95% 1,0412,06). CONCLUSION: Un taux élevé dee LTFU provenant du traitement de la TB était associé à des facteurs indiquant des obstacles à l'accès aux soins et à l'achèvement du traitement. La décentralisation et le renforcement des services de lutte contre la TB pour améliorer les soins centrés sur la personne et le soutien au traitement sont nécessaires de toute urgence dans la province de Madang.
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SETTING: Multidrug-resistant/rifampicin-resistant TB (MDR/RR-TB) is now endemic in the National Capital District (NCD), Papua New Guinea. Loss to follow-up (LTFU) is a challenge. OBJECTIVE: To evaluate and identify risk factors for LTFU, including pre-treatment LTFU, in adults with MDR/RR-TB at Port Moresby General Hospital (PMGH). DESIGN: A retrospective analysis of treatment initiation in adults diagnosed with MDR/RR-TB (2018-2022) and outcomes for a cohort treated for MDR/RR-TB (2014-2019). We assessed the factors associated with LTFU using multivariate logistic regression. RESULTS: Of 95 patients diagnosed with MDR/RR-TB at PMGH from 2018 to 2022, 21 (22%) were lost to follow-up before treatment. Of the 658 adults who initiated treatment for MDR/RR-TB at PMGH from 2014 to 2019, 161 (24%) were lost to follow-up during treatment. A higher proportion of patients on injectable-containing long regimens (110/404, 27%) were lost to follow-up than those on the all-oral regimen containing bedaquiline (13/66, 12%). Treatment loss to follow-up was associated with age (35-54 years age group: aOR 0.49, 95% CI 0.32-0.77; 55-75 years age group: aOR 0.42, 95% CI 0.19-0.90; compared to the 15-34 years age group), residence outside of NCD (aOR 1.79, 95% CI 1.04-3.06), and year of treatment initiation. CONCLUSION: Pre-treatment LTFU requires programmatic focus. Shorter oral regimens and decentralised services may address the reasons for higher LTFU in younger people and people living outside NCD.
CONTEXTE: La TB multirésistante/résistante à la rifampicine (MDR-TB/RR-TB, pour l'anglais « multidrug/rifampicin-resistant TB ¼) est maintenant endémique dans le district de la capitale nationale (NCD, pour l'anglais « National Capital District ¼), en Papouasie-Nouvelle-Guinée. La perte de suivi (LTFU, pour l'anglais « loss to follow-up ¼) est un défi. OBJECTIF: Évaluer et identifier les facteurs de risque de LTFU, y compris le LTFU avant le traitement, chez les adultes atteints de MDR-TB/RR-TB à Port Moresby General Hospital (PMGH). CONCEPTION: Une analyse rétrospective de l'initiation du traitement chez les adultes diagnostiqués avec une MDR-TB/RR-TB (20182022) et des résultats pour une cohorte traitée pour la MDR-TB/RR-TB (20142019). Nous avons évalué les facteurs associés au LTFU à l'aide d'une régression logistique multivariée. RÉSULTATS: Sur les 95 patients diagnostiqués avec une MDR-TB/RR-TB à PMGH de 2018 à 2022, 21 (22%) ont été perdus de vue avant le traitement. Sur les 658 adultes qui ont commencé un traitement pour la MDR-TB/RR-TB à PMGH entre 2014 et 2019, 161 (24%) ont été perdus de vue pendant le traitement. Une proportion plus élevée de patients recevant des régimes longs contenant des injectables (110/404 ; 27%) ont été perdus de vue que ceux recevant un régime entièrement oral contenant de la bédaquiline (13/66 ; 12%). La perte de traitement au suivi était associée à l'âge (groupe d'âge de 35 à 54 ans : aOR 0,49 ; IC à 95% 0,32 à 0,77 ; groupe d'âge de 55 à 75 ans : aOR 0,42 ; IC à 95% 0,19 à 0,90 ; par rapport au groupe d'âge de 15 à 34 ans), à la résidence en dehors des NCD (aOR 1,79 ; IC à 95% 1,04 à 3,06) et à quelques années de début de traitement. CONCLUSION: Le LTFU avant le traitement nécessite une orientation programmatique. Des régimes oraux plus courts et des services décentralisés peuvent s'attaquer aux raisons de l'augmentation du LTFU chez les jeunes et les personnes vivant en dehors des NCD.
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SETTING: Papua New Guinea (PNG) has one of the world's highest TB incidence rates. It is difficult for patients to access TB care in remote provinces due to insufficient infrastructure and challenging terrain, making varied, targeted delivery models for treating TB necessary. OBJECTIVE: To assess treatment outcomes using self-administered treatment (SAT), family-supported treatment and community-based directly observed therapy (DOT) via treatment supporter (TS) in the PNG context. DESIGN: A retrospective, descriptive analysis of routinely collected data from 360 patients at two sites in 2019-2020. All patients were assigned a treatment model based on risk factors (adherence or default) and offered patient education and counselling (PEC), family counselling and transportation fees. End-of-treatment outcomes were assessed for each model. RESULTS: Treatment success rates among drug-susceptible TB (DS-TB) were good overall: 91.1% for SAT, 81.4% for family-supported treatment and 77% for DOT patients. SAT was strongly associated with favourable outcomes (OR 5.7, 95% CI 1.7-19.3), as were PEC sessions (OR 4.3, 95% CI 2.5-7.2). CONCLUSION: By considering risk factors when determining their treatment delivery model, strong outcomes were seen in all three groups. Multiple modes of treatment administration, tailored to individuals' needs and risk factors, is a feasible, effective, patient-centred care model for hard-to-reach, resource-limited settings.
LIEU: La Papouasie-Nouvelle-Guinée (PNG) présente l'un des taux d'incidence de TB les plus élevés au monde. Il est difficile pour les patients d'accéder aux soins contre la TB dans les provinces éloignées en raison d'une infrastructure insuffisante et d'un terrain difficile, rendant nécessaire l'utilisation de modèles de prestation variés et ciblés pour le traitement de la tuberculose. OBJECTIF: Évaluer les résultats du traitement en utilisant l'autotraitement, le traitement soutenu par la famille et la thérapie directement observée (DOT) basée sur la communauté avec un accompagnateur de traitement, dans le contexte de la PNG. MÉTHODES: Une analyse rétrospective et descriptive des données collectées de manière routinière auprès de 360 patients dans deux sites entre 2019 et 2020. Tous les patients ont été assignés à un modèle de traitement en fonction des facteurs de risque (adhésion ou abandon) et ont bénéficié d'une éducation et d'un accompagnement des patients, de conseils aux familles et de frais de transport. Les résultats en fin de traitement ont été évalués pour chaque modèle. RÉSULTATS: Les taux de réussite du traitement de la TB sensible aux médicaments (DS-TB) étaient globalement bons: 91,1% pour l'autotraitement, 81,4% pour le traitement soutenu par la famille et 77% pour les patients en DOT. L'autotraitement était fortement associé à des résultats favorables (OR 5,7; IC 95% 1,719,3), tout comme les séances d'éducation et d'accompagnement des patients (OR 4,3; IC 95% 2,57,2). CONCLUSION: En tenant compte des facteurs de risque lors de la détermination du modèle de prestation de traitement, de bons résultats ont été observés dans les trois groupes. Plusieurs modes d'administration du traitement, adaptés aux besoins et aux facteurs de risque individuels, constituent un modèle de soins réalisable, efficace et centré sur le patient pour les contextes difficiles d'accès et aux ressources limitées.
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Paediatric tuberculosis can be challenging to diagnose, and various approaches are used in different settings. A retrospective review was conducted on Papua New Guinea (PNG) children with presumptive TB who presented for health care in the Torres Strait Islands, Australia, between 2016 and 2019. We compared diagnostic algorithms including the modified Keith Edwards TB Score, The Union Desk Guide, and the new World Health Organization (WHO) algorithm, with diagnostic practices used in the remote Torres Strait Islands. Of the 66 children with presumptive TB, 7 had bacteriologically confirmed TB. The majority (52%) were under 5 years (median age 61 months), and 45% were malnourished. There was moderate agreement across the diagnostic methods (K = 0.34; 95% CI 0.23-0.46), with the highest concordance observed between The Union Desk Guide and the WHO's algorithm (K = 0.61). Local TB physicians might have over-diagnosed presumed lymph node TB while under-diagnosing TB overall. Enhancing the precision and promptness of paediatric TB diagnosis using practical tools is pivotal to decrease TB-related child mortality, notably in isolated regions like the Torres Strait and the Western Province of PNG.
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Purpose: Papua New Guinea (PNG) has extreme linguistic diversity reflected in its three national languages and sociolinguistic diversity comprising over 380 vernaculars or Tokples, English and the lingua francas, which include Tok Pisin (TP). This first clinical cross-sectional study of consonant acquisition in TP-speaking children sought to identify universal features and the impact of age on phonological development.Method: A local picture naming task was developed and used to elicit a speech sample from 80 children (aged 3;0-6;11). Phonetic and phonemic inventories and developmental phonological processes were analysed across the sample and also in 12-month age groups.Result: Statistically significant differences were found between the Percentage Consonants Correct (PCC) of the 3YO and other age groups. Mean PCC increased with age, but high variation within age groups meant differences were not statistically significant. Universal features observed included the early acquisition of plosives and late mastery of /r/. Language-specific features included processes such as fricatisation and earlier acquisition of /ʤ/ before /s/. Creolisation was seen in morphophonemic condensation and the influence of loanwords.Conclusion: This study demonstrates both universal and language-specific features amidst wide diversity influencing phonological acquisition in creolising TP. This first phonological study of TP consonant development will inform future clinical speech-language pathology practice in PNG.
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Multilinguismo , Criança , Linguagem Infantil , Estudos Transversais , Humanos , Papua Nova Guiné , Fonética , Medida da Produção da FalaRESUMO
The coronavirus disease pandemic has highlighted the utility of pathogen genomics as a key part of comprehensive public health response to emerging infectious diseases threats, however, the ability to generate, analyse, and respond to pathogen genomic data varies around the world. Papua New Guinea (PNG), which has limited in-country capacity for genomics, has experienced significant outbreaks of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) with initial genomics data indicating a large proportion of cases were from lineages that are not well defined within the current nomenclature. Through a partnership between in-country public health agencies and academic organisations, industry, and a public health genomics reference laboratory in Australia a system for routine SARS-CoV-2 genomics from PNG was established. Here we aim to characterise and describe the genomics of PNG's second wave and examine the sudden expansion of a lineage that is not well defined but very prevalent in the Western Pacific region. We generated 1797 sequences from cases in PNG and performed phylogenetic and phylodynamic analyses to examine the outbreak and characterise the circulating lineages and clusters present. Our results reveal the rapid expansion of the B.1.466.2 and related lineages within PNG, from multiple introductions into the country. We also highlight the difficulties that unstable lineage assignment causes when using genomics to assist with rapid cluster definitions.
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Background: GLOBOCAN 2020 and Global Burden of Disease (GBD) 2019 are the two most established global online cancer databases. It is important to examine the differences between the two platforms, to attempt to explain these differences, and to appraise the quality of the data. There are stark differences for lip and oral cancers (LOC) and we attempt to explain these by detailed analysis of ten countries at the extremes of differences. Methods: Age-standardised incidence rates (ASIR) of LOC were obtained from GLOBOCAN 2020 and GBD 2019. Five countries with the greatest and smallest fold differences were selected. A systematic search of PubMed and Embase electronic databases was then performed to identify publications reporting the incidence of LOC in the selected countries between 2015 and 2022. Specifically, data sources of the articles were examined and evaluated. Findings: For LOC, greatest differences were found in Papua New Guinea, Vietnam, China, Pakistan, and Indonesia (group A). In contrast, the United States of America (USA), Brazil, France, Germany, and India (group B) had the least differences between the two databases. Interpretation: It is not surprising that when GLOBOCAN and GBD could not obtain high-quality or accessible LOC data from national or local cancer registries, as in group A, discrepancies would be seen between the two online databases. In contrast, where only minor differences were seen between GLOBOCAN and GBD, as in group B, presumptively due to those countries having well-established cancer registries and healthcare administrative systems, the literature is more consistent. Moreover, many studies have grouped lip and oral cavity with pharynx and categorised outputs as "oral and oropharyngeal cancer" or "oral cavity and pharynx cancer". Those categorisations lacked subsite accuracy and failed to realise that oral cancer and oropharyngeal cancer have completely different etiological factors, pathogeneses, prognosis, and treatment outcomes. Funding: This research received no specific grant or funding from any funding agency in the public, commercial, or not-for-profit sectors, and the authors received no financial support for the research, authorship, and/or publication of this article.
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OBJECTIVES: Papua New Guinea (PNG) has among the highest rates of sexually transmitted infections (STIs) globally and is committed to reducing their incidence. The Syphilis Interventions Towards Elimination (SITE) model was used to explore the expected impact and cost of alternative syphilis intervention scale-up scenarios. METHODS: SITE is a dynamical model of syphilis transmission among adults 15-49 years. Individuals are divided into nine groups based on sexual behaviour and into six stages of infection. The model was calibrated to PNG using data from routine surveillance, bio-behavioural surveys, research studies and program records. Inputs included syphilis prevalence, risk behaviours, intervention coverage and service delivery unit costs. Scenarios compared different interventions (clinical treatment, contact tracing, syphilis screening, and condom promotion) for incidence and cost per infection averted over 2021-2030. RESULTS: Increasing treatment coverage of symptomatic primary/secondary-stage syphilis cases from 25-35% in 2020 to 60% from 2023 onwards reduced estimated incidence over 2021-2030 by 55%, compared to a scenario assuming constant coverage at 2019-2020 levels. The introduction of contact tracing in 2020, assuming 0.4 contacts per symptomatic person treated, reduced incidence over 2021-2030 by 10%. Increasing screening coverage by 20-30 percentage points from the 2019-2020 level reduced incidence over 2021-2030 by 3-16% depending on the target population. Scaling-up clinical, symptom-driven treatment and contact tracing had the lowest cost per infection averted, followed by condom promotion and periodic screening of female sex workers and men who have sex with men. CONCLUSIONS: PNG could considerably reduce its syphilis burden by scaling-up clinical treatment and contact tracing alongside targeted behavioural risk reduction interventions. SITE is a useful tool countries can apply to inform national STI programming and resource allocation.
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Dr Himson Tamur Mulas was born on the Gazelle Peninsula of East New Britain, New Guinea, on 13 March 1934. After finishing his schooling, he was selected to go to Fiji to undertake a medical course at Fiji Central Medical School in 1953, returning to New Guinea in 1958. He successfully completed residency posts and after a period of training in anaesthesia in Port Moresby, was sent to the Alfred Hospital in Melbourne, Australia, in 1966-1967 to further his anaesthetic career. After returning to New Guinea he undertook several administrative posts as well as continuing his anaesthetic career before settling at Nonga Hospital in Rabaul, East New Britain Province. He was first registered as a specialist anaesthetist in 1972. He went on to complete a Diploma in Public Health in New Zealand in 1974, and in 1976 completed a Diploma in Tropical Health and Hygiene at the University of Sydney. He left public hospital anaesthetic practice in 1980. He is recognised as the first New Guinean to be a specialist anaesthetist. He died on 28 July 2000 aged 66 years.
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Anestesiologia , Idoso , Anestesistas , Austrália , Humanos , Masculino , Nova Zelândia , Papua Nova GuinéRESUMO
Current researches on dynamic analysis of energy supply mainly (1) Chaotic control of supply process. (2) Resource synchronization in supply process. (3) Dynamic behavior of energy supply under the influence of parameter perturbation. However, in above researches, the disturbance type is not described and classified. In addition, none of the three approaches addresses the stability of the energy supply. In order to improve the above methods, in this paper, the stability analysis method of energy supply process is firstly proposed, this method can judge whether the deterministic energy supply system is stable at different times. However, the disadvantage of this method is that it is suitable for non-chaotic deterministic systems, but internal and external disturbances of the energy supply will make the supply system unstable and fall into chaos. So we classify the types of disturbances, give robustness of the system under different disturbances, and help company design energy supply system and select the system parameters with good robustness to analyze stability of energy supply process. â¢The internal and external disturbances of the system are classified and discussed.â¢Proposed the concept of robustness of energy supply system, and give the method to judge the robustness of the system.
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Peptide: N-glycanase (PNGase; EC 3.5.1.52) is a deglycosylation enzyme that is responsible for deglycosylating misfolded glycoproteins in the endoplasmic reticulum. However, the role of PNGase in plants is largely unknown. Here, we cloned and characterized the function of peptide: N-glycanase (CsPNG1) from cucumber. The amino acid encoded by CsPNG1 gene contained a typical transglutaminase (TGase) catalytic triad domain and belonged to the "TGase superfamily". Subcellular localization showed that CsPNG1 was located in the cell membrane and nucleus. Promoter sequence analysis and qPCR tests showed that CsPNG1 could respond to a variety of abiotic stresses and hormone treatments. Yeast one-hybrid assays revealed the interaction between the transcription factor CsGT-3b and CsPNG1 promoter. Importantly, overexpression of CsPNG1 in tobacco increased the tolerance to salt stress of transgenic plants. In addition, CsPNG1 interacted with CsRAD23 family proteins and the C-terminal UBA domain of CsRAD23 protein was responsible for binding to CsPNG1, indicating that CsPNG1 was involved in the ER-associated degradation pathway (ERAD). Taken together, our study demonstrated that CsPNG1 plays a positive role in improving plant salt tolerance, and these findings might provide a basis for further functional analysis of CsPNG1 genes in abiotic stress and ERAD.