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Bryce A, Davison S, Currie BJ, Birrell JM, Baird RW, Abeyaratne A, Majoni SW, Brewster-O’Brien T, Tong SYC. Lower Rates of Staphylococcus aureus Bloodstream Infection in Patients on Hemodialysis Receiving Trimethoprim-Sulfamethoxazole Melioidosis Prophylaxis. Open Forum Infect Dis 2024; 11:ofae431. [PMID: 39130084 PMCID: PMC11310582 DOI: 10.1093/ofid/ofae431] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Accepted: 07/18/2024] [Indexed: 08/13/2024] Open
Abstract
Hemodialysis is a risk factor for Staphylococcus aureus bloodstream infection (SAB). In this single-center study, SAB rates were 56% lower during the monsoonal wet season when patients on hemodialysis receive supervised melioidosis prophylaxis with trimethoprim-sulfamethoxazole. This intervention may reduce SAB rates in high-risk patients; however, further targeted studies are required.
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Affiliation(s)
- Aliya Bryce
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Department of General Medicine, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - Sara Davison
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Bart J Currie
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Johanna M Birrell
- Northern Territory Centre for Disease Control, NT Health, Darwin, Northern Territory, Australia
| | - Robert W Baird
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Asanga Abeyaratne
- Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Department of Nephrology, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia
| | - Sandawana William Majoni
- Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Department of Nephrology, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia
| | | | - Steven Y C Tong
- Victorian Infectious Diseases Service, The Royal Melbourne Hospital at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
- Department of Infectious Diseases, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
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Ryder JH, Minter DJ. Trimethoprim-Sulfamethoxazole for Staphylococcus Aureus Bacteremia Prophylaxis in Patients on Hemodialysis: A Future Tool for the "Swiss Army Knife" of Antibiotics? Open Forum Infect Dis 2024; 11:ofae432. [PMID: 39130081 PMCID: PMC11310701 DOI: 10.1093/ofid/ofae432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Accepted: 07/29/2024] [Indexed: 08/13/2024] Open
Affiliation(s)
- Jonathan H Ryder
- Division of Infectious Diseases, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska, USA
| | - Daniel J Minter
- Division of Infectious Diseases, Department of Medicine, University of California, San Francisco, San Francisco, California, USA
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Liu WY, Lian LY, Zhang H, Chen SD, Jin XZ, Zhang N, Ye CH, Chen WY, Bee GGB, Wang FD, Miele L, Corradini E, Valenti L, Zheng MH. A Population-Based and Clinical Cohort Validation of the Novel Consensus Definition of Metabolic Hyperferritinemia. J Clin Endocrinol Metab 2024; 109:1540-1549. [PMID: 38124275 PMCID: PMC11099479 DOI: 10.1210/clinem/dgad749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 12/09/2023] [Accepted: 12/18/2023] [Indexed: 12/23/2023]
Abstract
CONTEXT There is limited data on the clinical significance of metabolic hyperferritinemia (MHF) based on the most recent consensus. OBJECTIVE We aimed to validate the clinical outcomes of MHF in the general population and patients with biopsy-proven metabolic dysfunction-associated fatty liver disease (MAFLD). METHODS The NHANES database and PERSONS cohort were included. MHF was defined as elevated serum ferritin with metabolic dysfunction (MD) and stratified into different grades according to ferritin (grade 1: 200 [females]/300 [males]-550 ng/mL; grade 2: 550-1000 ng/mL; grade 3: >1000 ng/mL). The clinical outcomes, including all-cause death, comorbidities, and liver histology, were compared between non-MHF and MHF in adjusted models. RESULTS In NHANES, compared with non-MHF with MD, MHF was related to higher risks of advanced fibrosis (P = .036), elevated albumin-creatinine ratio (UACR, P = .001), and sarcopenia (P = .013). Although the association between all grades of MHF and mortality was insignificant (P = .122), grades 2/3 was associated with increased mortality (P = .029). When comparing with non-MHF without MD, the harmful effects of MHF were more significant in mortality (P < .001), elevated UACR (P < .001), cardiovascular disease (P = .028), and sarcopenia (P < .001). In the PERSONS cohort, MHF was associated with more advanced grades of steatosis (P < .001), lobular inflammation (P < .001), advanced fibrosis (P = .017), and more severe hepatocellular iron deposition (P < .001). CONCLUSION Both in the general population and in at-risk individuals with MAFLD, MHF was related with poorer clinical outcomes.
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Affiliation(s)
- Wen-Yue Liu
- Department of Endocrinology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- Wenzhou Key Laboratory of Diabetes Research, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Li-You Lian
- MAFLD Research Center, Department of Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- Institute of Hepatology, Wenzhou Medical University, Wenzhou 325000, China
- Key Laboratory of Diagnosis and Treatment for the Development of Chronic Liver Disease in Zhejiang Province, Wenzhou 325000, China
| | - Huai Zhang
- Biostatistics and Medical Quality Management Office, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Sui-Dan Chen
- Department of Pathology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Xin-Zhe Jin
- Department of Laboratory, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - Ni Zhang
- MAFLD Research Center, Department of Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- Institute of Hepatology, Wenzhou Medical University, Wenzhou 325000, China
- Key Laboratory of Diagnosis and Treatment for the Development of Chronic Liver Disease in Zhejiang Province, Wenzhou 325000, China
| | - Chen-Hui Ye
- MAFLD Research Center, Department of Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- Institute of Hepatology, Wenzhou Medical University, Wenzhou 325000, China
- Key Laboratory of Diagnosis and Treatment for the Development of Chronic Liver Disease in Zhejiang Province, Wenzhou 325000, China
| | - Wen-Ying Chen
- MAFLD Research Center, Department of Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- Institute of Hepatology, Wenzhou Medical University, Wenzhou 325000, China
- Key Laboratory of Diagnosis and Treatment for the Development of Chronic Liver Disease in Zhejiang Province, Wenzhou 325000, China
| | - George Goh Boon Bee
- Department of Gastroenterology and Hepatology, Singapore General Hospital, Singapore 169608, Singapore
| | - Fu-Di Wang
- The Fourth Affiliated Hospital, School of Public Health, Zhejiang University School of Medicine, Hangzhou 310000, China
- The First Affiliated Hospital, Basic Medical Sciences, School of Public Health, Hengyang Medical School, University of South China, Hengyang 421001, China
| | - Luca Miele
- Department of Internal Medicine Medical and Surgical Sciences, Fondazione Policlinico A. Gemelli IRCCS, Università Cattolica di Roma, Rome 00168, Italy
| | - Elena Corradini
- Department of Medical and Surgical Sciences, Università degli Studi di Modena e Reggio Emilia, Modena 41100, Italy
- Internal Medicine and Centre for Hemochromatosis and Hereditary Liver Diseases, Azienda Ospedaliero-Universitaria di Modena-Policlinico, Modena 41100, Italy
| | - Luca Valenti
- Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan 20121, Italy
- Biological Resource Center and Precision Medicine Lab, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, Milan 20121, Italy
- Department of Transfusion Medicine, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milano, Milan 20121, Italy
| | - Ming-Hua Zheng
- MAFLD Research Center, Department of Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
- Institute of Hepatology, Wenzhou Medical University, Wenzhou 325000, China
- Key Laboratory of Diagnosis and Treatment for the Development of Chronic Liver Disease in Zhejiang Province, Wenzhou 325000, China
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Meumann EM, Limmathurotsakul D, Dunachie SJ, Wiersinga WJ, Currie BJ. Burkholderia pseudomallei and melioidosis. Nat Rev Microbiol 2024; 22:155-169. [PMID: 37794173 DOI: 10.1038/s41579-023-00972-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/04/2023] [Indexed: 10/06/2023]
Abstract
Burkholderia pseudomallei, the causative agent of melioidosis, is found in soil and water of tropical and subtropical regions globally. Modelled estimates of the global burden predict that melioidosis remains vastly under-reported, and a call has been made for it to be recognized as a neglected tropical disease by the World Health Organization. Severe weather events and environmental disturbance are associated with increased case numbers, and it is anticipated that, in some regions, cases will increase in association with climate change. Genomic epidemiological investigations have confirmed B. pseudomallei endemicity in newly recognized regions, including the southern United States. Melioidosis follows environmental exposure to B. pseudomallei and is associated with comorbidities that affect the immune response, such as diabetes, and with socioeconomic disadvantage. Several vaccine candidates are ready for phase I clinical trials. In this Review, we explore the global burden, epidemiology and pathophysiology of B. pseudomallei as well as current diagnostics, treatment recommendations and preventive measures, highlighting research needs and priorities.
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Affiliation(s)
- Ella M Meumann
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.
- Department of Infectious Diseases, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia.
| | - Direk Limmathurotsakul
- Mahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- NDM Centre for Global Health Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Susanna J Dunachie
- Mahidol-Oxford Tropical Medicine Research Unit, Mahidol University, Bangkok, Thailand
- NDM Centre for Global Health Research, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Willem J Wiersinga
- Division of Infectious Diseases, Center for Experimental Molecular Medicine, Amsterdam University Medical Centers, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands
| | - Bart J Currie
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
- Department of Infectious Diseases, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia
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Efficacy of Co-Trimoxazole against Experimental Melioidosis Acquired by Different Routes of Infection. Antimicrob Agents Chemother 2022; 66:e0070822. [PMID: 36226972 DOI: 10.1128/aac.00708-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Burkholderia pseudomallei is the causative agent of melioidosis and presents with diverse clinical manifestations. Naturally occurring infection occurs following contamination of cuts or skin abrasions, or ingestion of contaminated water, and occasionally through inhalational of infected soil or water particles. The influence of the route of disease acquisition on the efficacy of medical countermeasures has not been explored in humans or in appropriate animal models. The efficacy of co-trimoxazole against melioidosis acquired by different routes of exposure was assessed in postexposure prophylaxis (PEP) and treatment studies in marmoset models of melioidosis. Following challenge with B. pseudomallei by the inhalational, subcutaneous, or ingestion routes of administration, animals were given co-trimoxazole at 12 hourly intervals for 14 days, starting either 6 h postchallenge or at the onset of fever. Animals were then observed for 28 days. All animals that received antibiotic 6 h postchallenge survived the duration of dosing. All animals that received antibiotics at the onset of fever completed the treatment, but 10%, 57%, and 60% of those with ingestion, subcutaneous, and inhalation challenge relapsed, respectively. Bacteriological and histological differences were observed between placebo-control animals and those that relapsed. Immunological profiles indicate difference between animals given placebo and those that relapsed or survived the duration of the study. A broad T-cell activation was observed in animals that survived. Overall, these data suggest the efficacy of co-trimoxazole, as measured in the incidence of relapse, differs depending on the disease-acquisition route. Therefore, there are implications in treating this disease in regions of endemicity.
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Birrell JM, Boyd R, Currie BJ, Anstey NM, Abeyaratne A, Majoni SW, Krause VL. Invasive group A streptococcal disease in the Northern Territory and the impact of melioidosis antibiotic prophylaxis. Med J Aust 2022; 217:544-545. [PMID: 36172918 DOI: 10.5694/mja2.51739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 09/01/2022] [Accepted: 09/07/2022] [Indexed: 11/17/2022]
Affiliation(s)
| | - Rowena Boyd
- Northern Territory Centre for Disease Control, NT Health Darwin NT
| | - Bart J Currie
- Menzies School of Health Research Charles Darwin University Darwin NT
- Northern Territory Medical Program, Royal Darwin Hospital Darwin NT
| | - Nicholas M Anstey
- Menzies School of Health Research Charles Darwin University Darwin NT
- Northern Territory Medical Program, Royal Darwin Hospital Darwin NT
| | - Asanga Abeyaratne
- Menzies School of Health Research Charles Darwin University Darwin NT
- Northern Territory Medical Program, Royal Darwin Hospital Darwin NT
| | - Sandawana William Majoni
- Menzies School of Health Research Charles Darwin University Darwin NT
- Northern Territory Medical Program, Royal Darwin Hospital Darwin NT
| | - Vicki L Krause
- Northern Territory Centre for Disease Control, NT Health Darwin NT
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Davies P, Smith S, Wilcox R, Stewart JD, Davis TJ, McKenna K, Hanson J. Examination of the independent contribution of rheumatic heart disease and congestive cardiac failure to the development and outcome of melioidosis in Far North Queensland, tropical Australia. PLoS Negl Trop Dis 2022; 16:e0010604. [PMID: 35849581 PMCID: PMC9292120 DOI: 10.1371/journal.pntd.0010604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 06/23/2022] [Indexed: 11/19/2022] Open
Abstract
Background Patients with rheumatic heart disease (RHD) and congestive cardiac failure (CCF) are believed to have an increased risk of melioidosis and are thought to be more likely to die from the infection. This study was performed to confirm these findings in a region with a high incidence of all three conditions. Principal findings Between January 1998 and December 2021 there were 392 cases of melioidosis in Far North Queensland, tropical Australia; 200/392 (51.0%) identified as an Indigenous Australian, and 337/392 (86.0%) had a confirmed predisposing comorbidity that increased risk for the infection. Overall, 46/392 (11.7%) died before hospital discharge; the case fatality rate declining during the study period (p for trend = 0.001). There were only 3/392 (0.8%) with confirmed RHD, all of whom had at least one other risk factor for melioidosis; all 3 survived to hospital discharge. Among the 200 Indigenous Australians in the cohort, 2 had confirmed RHD; not statistically greater than the prevalence of RHD in the local general Indigenous population (1.0% versus 1.2%, p = 1.0). RHD was present in only 1/193 (0.5%) cases of melioidosis diagnosed after October 2016, a period which coincided with prospective data collection. There were 26/392 (6.6%) with confirmed CCF, but all 26 had another traditional risk factor for melioidosis. Patients with CCF were more likely to also have chronic lung disease (OR (95% CI: 4.46 (1.93–10.31), p<0.001) and chronic kidney disease (odds ratio (OR) (95% confidence interval (CI): 2.98 (1.22–7.29), p = 0.01) than those who did not have CCF. Two patients with melioidosis and CCF died before hospital discharge; both were elderly (aged 81 and 91 years) and had significant comorbidity. Conclusions In this region of tropical Australia RHD and CCF do not appear to be independent risk factors for melioidosis and have limited prognostic utility. Melioidosis, a disease caused by Burkholderia pseudomallei, rarely develops in the absence of well-described predisposing conditions that include diabetes mellitus, hazardous alcohol intake, chronic kidney disease, chronic lung disease, malignancy, and immunosuppression. These comorbidities are also strongly linked to patients’ short and long-term outcomes. In the large Darwin Prospective Melioidosis Study (DPMS) performed in Australia’s Northern Territory, the presence of rheumatic heart disease (RHD) and/or congestive cardiac failure (CCF) were independently associated with pulmonary melioidosis and independently predicted death. Indeed, patients with RHD and/or CCF and melioidosis had the highest case-fatality rate in the DPMS cohort. The prevalence of RHD and/or CCF in cases of melioidosis in this study in Far North Queensland (FNQ), was similar to that seen in the Northern Territory. However, every patient had at least one other traditional risk factor for the disease. Furthermore, pulmonary involvement and mortality were not higher in patients with RHD and/or CCF. In FNQ, RHD and CCF are not independent risk factors for melioidosis and have limited prognostic utility. The high prevalence of these cardiac diseases in patients with melioidosis may be, at least partly, explained by the confounding presence of socioeconomic disadvantage that increases the incidence of all three conditions.
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Affiliation(s)
- Phoebe Davies
- Department of Medicine, Cairns Hospital, Cairns, Queensland, Australia
| | - Simon Smith
- Department of Medicine, Cairns Hospital, Cairns, Queensland, Australia
| | - Rob Wilcox
- Tropical Public Health Service, Cairns, Queensland, Australia
| | - James D. Stewart
- Department of Medicine, Cairns Hospital, Cairns, Queensland, Australia
| | - Tania J. Davis
- Department of Medicine, Cairns Hospital, Cairns, Queensland, Australia
| | - Kylie McKenna
- Tropical Public Health Service, Cairns, Queensland, Australia
| | - Josh Hanson
- Department of Medicine, Cairns Hospital, Cairns, Queensland, Australia
- Kirby Institute, University of New South Wales, Sydney, Australia
- * E-mail:
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Xu C, Goh KL, Abeyaratne A, Priyadarshana K. Induction therapy and outcome of proliferative lupus nephritis in the top end of Northern Australia - a single centre study retrospective study. BMC Nephrol 2022; 23:235. [PMID: 35787253 PMCID: PMC9254616 DOI: 10.1186/s12882-022-02849-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 06/02/2022] [Indexed: 11/25/2022] Open
Abstract
Background Lupus nephritis is a common manifestation of Systemic Lupus Erythematosus. Mycophenolate is recommended by guidelines for induction therapy in patients with proliferative lupus nephritis and nephrotic range proteinuria Class V lupus nephritis. Indigenous Australians suffer disproportionally from systemic lupus erythematosus compared to non-Indigenous Australians (Anstey et al., Aust N Z J Med 23:646–651, 1993; Segasothy et al., Lupus 10:439–444, 2001; Bossingham, Lupus 12:327–331, 2003; Grennan et al., Aust N Z J Med 25:182–183, 1995). Methods We retrospectively identified patients with newly diagnosed biopsy-proven class III lupus nephritis, class IV lupus nephritis and class V lupus nephritis with nephrotic range proteinuria from 1st Jan 2010 to 31st Dec 2019 in our institution and examined for the patterns of prescribed induction therapy and clinical outcome. The primary efficacy outcome of interest was the incidence of complete response (CR) and partial response (PR) at one-year post diagnosis as defined by the Kidney Disease: Improving Global Outcome (KDIGO) guideline. Secondary efficacy outcome was a composite of renal adverse outcome in the follow-up period. Adverse effect outcome of interest was any hospitalisations secondary to infections in the follow-up period. Continuous variables were compared using Student’s t-test or Mann–Whitney U-test. Categorical variables were summarised using frequencies and percentages and assessed by Fisher’s exact test. Time-to-event data was compared using the Kaplan–Meier method and Log-rank test. Count data were assessed using the Poisson’s regression method and expressed as incident rate ratio. Results Twenty of the 23 patients included in the analysis were managed with mycophenolate induction upfront. Indigenous Australian patients (N = 15), compared to non-Indigenous patients (N = 5) received lower cumulative dose of mycophenolate mofetil over the 24 weeks (375 g vs. 256 g, p < 0.05), had a non-significant lower incidence of complete remission at 12 months (60% vs. 40%, p = 0.617), higher incidence of composite renal adverse outcome (0/5 patients vs. 5/15 patients, p = 0.20) and higher incidence of infection related hospitalisations, (incident rate ratio 3.66, 95% confidence interval 0.89–15.09, p = 0.073). Conclusion Mycophenolate as upfront induction in Indigenous Australian patients were associated with lower incidence of remission and higher incidence of adverse outcomes. These observations bring the safety and efficacy profile of mycophenolate in Indigenous Australians into question.
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Affiliation(s)
- Chi Xu
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, Darwin, NT, Australia. .,Department of Renal Medicine, Royal Darwin Hospital, Rockland Drive, Tiwi, NT, 0810, Australia.
| | - Kim Ling Goh
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, Darwin, NT, Australia
| | - Asanga Abeyaratne
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, Darwin, NT, Australia.,Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, NT, Australia
| | - Kelum Priyadarshana
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, Darwin, NT, Australia
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Savelkoel J, Dance DAB, Currie BJ, Limmathurotsakul D, Wiersinga WJ. A call to action: time to recognise melioidosis as a neglected tropical disease. THE LANCET INFECTIOUS DISEASES 2022; 22:e176-e182. [DOI: 10.1016/s1473-3099(21)00394-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/07/2021] [Accepted: 06/28/2021] [Indexed: 10/19/2022]
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10
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Chieng R. Melioidosis. WIKIJOURNAL OF MEDICINE 2022. [DOI: 10.15347/wjm/2022.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Majoni SW, Nelson J, Germaine D, Hoppo L, Long S, Divakaran S, Turner B, Graham J, Cherian S, Pawar B, Rathnayake G, Heron B, Maple-Brown L, Batey R, Morris P, Davies J, Fernandes DK, Sundaram M, Abeyaratne A, Wong YHS, Lawton PD, Taylor S, Barzi F, Cass A. INFERR-Iron infusion in haemodialysis study: INtravenous iron polymaltose for First Nations Australian patients with high FERRitin levels on haemodialysis-a protocol for a prospective open-label blinded endpoint randomised controlled trial. Trials 2021; 22:868. [PMID: 34857020 PMCID: PMC8641231 DOI: 10.1186/s13063-021-05854-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/20/2021] [Indexed: 11/14/2022] Open
Abstract
Background The effectiveness of erythropoiesis-stimulating agents, which are the main stay of managing anaemia of chronic kidney disease (CKD), is largely dependent on adequate body iron stores. The iron stores are determined by the levels of serum ferritin concentration and transferrin saturation. These two surrogate markers of iron stores are used to guide iron replacement therapy. Most Aboriginal and/or Torres Islander Australians of the Northern Territory (herein respectfully referred to as First Nations Australians) with end-stage kidney disease have ferritin levels higher than current guideline recommendations for iron therapy. There is no clear evidence to guide safe and effective treatment with iron in these patients. We aim to assess the impact of intravenous iron treatment on all-cause death and hospitalisation with a principal diagnosis of all-cause infection in First Nations patients on haemodialysis with anaemia, high ferritin levels and low transferrin saturation Methods In a prospective open-label blinded endpoint randomised controlled trial, a total of 576 participants on maintenance haemodialysis with high ferritin (> 700 μg/L and ≤ 2000 μg/L) and low transferrin saturation (< 40%) from all the 7 renal units across the Northern Territory of Australia will be randomised 1:1 to receive intravenous iron polymaltose 400 mg once monthly (200 mg during 2 consecutive haemodialysis sessions) (Arm A) or no IV iron treatment (standard treatment) (Arm B). Rescue therapy will be administered when the ferritin levels fall below 700 μg/L or when clinically indicated. The primary outcome will be the differences between the two study arms in the risk of hospitalisation with all-cause infection or death. An economic analysis and several secondary and tertiary outcomes analyses will also be performed. Discussion The INFERR clinical trial will address significant uncertainty on the safety and efficacy of iron therapy in First Nations Australians with CKD with hyperferritinaemia and evidence of iron deficiency. This will hopefully lead to the development of evidence-based guidelines. It will also provide the opportunity to explore the causes of hyperferritinaemia in First Nations Australians from the Northern Territory. Trial registration This trial is registered with The Australian New Zealand Clinical Trials Registry (ANZCTR): ACTRN12620000705987. Registered 29 June 2020. Supplementary Information The online version contains supplementary material available at 10.1186/s13063-021-05854-w.
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Affiliation(s)
- Sandawana William Majoni
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia. .,Department of Nephrology, Division of Medicine, Royal Darwin Hospital, P.O. Box 41326, Casuarina, Darwin, Northern Territory, Australia. .,Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia.
| | - Jane Nelson
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Darren Germaine
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Libby Hoppo
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Stephanie Long
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Shilpa Divakaran
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Nephrology, Division of Medicine, Royal Darwin Hospital, P.O. Box 41326, Casuarina, Darwin, Northern Territory, Australia
| | - Brandon Turner
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Jessica Graham
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - Sajiv Cherian
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia.,Department of Nephrology, Division of Medicine, Alice Springs Hospital, Alice Springs, Northern Territory, Australia
| | - Basant Pawar
- Department of Nephrology, Division of Medicine, Alice Springs Hospital, Alice Springs, Northern Territory, Australia
| | - Geetha Rathnayake
- Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia.,Chemical Pathology-Territory Pathology, Department of Health, Northern Territory Government, Darwin, Northern Territory, Australia
| | - Bianca Heron
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, P.O. Box 41326, Casuarina, Darwin, Northern Territory, Australia
| | - Louise Maple-Brown
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Endocrinology, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Robert Batey
- Department of Nephrology, Division of Medicine, Alice Springs Hospital, Alice Springs, Northern Territory, Australia.,New South Wales Health, St Leonards, NSW, Australia
| | - Peter Morris
- Child Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Pediatrics, Division of Women, Children and Youth, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Jane Davies
- Department of Infectious Diseases, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia.,Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
| | - David Kiran Fernandes
- Department of Nephrology, Division of Medicine, Alice Springs Hospital, Alice Springs, Northern Territory, Australia
| | - Madhivanan Sundaram
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, P.O. Box 41326, Casuarina, Darwin, Northern Territory, Australia
| | - Asanga Abeyaratne
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Nephrology, Division of Medicine, Royal Darwin Hospital, P.O. Box 41326, Casuarina, Darwin, Northern Territory, Australia.,Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia
| | - Yun Hui Sheryl Wong
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Nephrology, Division of Medicine, Royal Darwin Hospital, P.O. Box 41326, Casuarina, Darwin, Northern Territory, Australia
| | - Paul D Lawton
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,The Central Clinical School, Monash University & Alfred Health, Melbourne, Australia
| | - Sean Taylor
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Nephrology, Division of Medicine, Royal Darwin Hospital, P.O. Box 41326, Casuarina, Darwin, Northern Territory, Australia
| | - Federica Barzi
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,UQ Poche Centre for Indigenous Health, The University of Queensland, St Lucia, Queensland, 4067, Australia
| | - Alan Cass
- Division of Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
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12
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Effectiveness of a multifaceted prevention programme for melioidosis in diabetics (PREMEL): A stepped-wedge cluster-randomised controlled trial. PLoS Negl Trop Dis 2021; 15:e0009060. [PMID: 34170931 PMCID: PMC8266097 DOI: 10.1371/journal.pntd.0009060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 07/08/2021] [Accepted: 06/04/2021] [Indexed: 12/29/2022] Open
Abstract
Background Melioidosis, an often-fatal infectious disease caused by the environmental Gram-negative bacillus Burkholderia pseudomallei, is endemic in tropical countries. Diabetes mellitus and environmental exposure are important risk factors for melioidosis acquisition. We aim to evaluate the effectiveness of a multifaceted prevention programme for melioidosis in diabetics in northeast Thailand. Methodology/Principal findings From April 2014 to December 2018, we conducted a stepped-wedge cluster-randomized controlled behaviour change trial in 116 primary care units (PCUs) in Ubon Ratchathani province, northeast Thailand. The intervention was a behavioural support group session to help diabetic patients adopt recommended behaviours, including wearing rubber boots and drinking boiled water. We randomly allocated the PCUs to receive the intervention starting in March 2016, 2017 and 2018. All diabetic patients were contacted by phone yearly, and the final follow-up was December 2018. Two primary outcomes were hospital admissions involving infectious diseases and culture-confirmed melioidosis. Of 9,056 diabetics enrolled, 6,544 (72%) received a behavioural support group session. During 38,457 person-years of follow-up, we observed 2,195 (24%) patients having 3,335 hospital admissions involved infectious diseases, 80 (0.8%) melioidosis, and 485 (5%) deaths. In the intention-to-treat analysis, implementation of the intervention was not associated with primary outcomes. In the per-protocol analysis, patients who received a behavioural support group session had lower incidence rates of hospital admissions involving infectious diseases (incidence rate ratio [IRR] 0.89; 95%CI 0.80–0.99, p = 0.03) and of all-cause mortality (IRR 0.54; 95%CI 0.43–0.68, p<0.001). However, the incidence rate of culture-confirmed melioidosis was not significantly lower (IRR 0.96, 95%CI 0.46–1.99, p = 0.66). Conclusions/Significance Clear benefits of this multifaceted prevention programme for melioidosis were not observed. More compelling invitations for the intervention, modification of or addition to the behaviour change techniques used, and more frequent intervention may be needed. Trial registration This trial is registered with ClinicalTrials.gov, number NCT02089152. Melioidosis, an infectious disease caused by environmental bacterium Burkholderia pseudomallei, is endemic in tropical countries. Diabetes mellitus is the most important risk factor, and routes of infection include skin inoculation, ingestion and inhalation. Prevention guidelines recommend that residents, rice farmers and visitors should wear protective gear such as rubber boots when in direct contact with soil and environmental water, and consume only boiled or bottled water. Here, we conducted a cluster randomized controlled trial to evaluate effectiveness of a multifaceted prevention programme for melioidosis in diabetic patients in northeast Thailand. We enrolled 9,056 diabetic patients in 2014. We randomly allocated primary care units as the unit of randomization to receive the intervention starting in March 2016, 2017 and 2018. All diabetic patients were contacted by phone yearly. We found that diabetic patients who received a behavioural support group session had lower incidence rates of hospital admissions involving infectious diseases and of all-cause mortality, but not of culture-confirmed melioidosis. In conclusion, clear benefits of this multifaceted prevention programme for melioidosis were not seen. We propose that more compelling invitations for the intervention, modification of or addition to the behaviour change techniques used, and more frequent intervention may be needed.
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13
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Majoni SW, Lawton PD, Rathnayake G, Barzi F, Hughes JT, Cass A. Narrative Review of Hyperferritinemia, Iron Deficiency, and the Challenges of Managing Anemia in Aboriginal and Torres Strait Islander Australians With CKD. Kidney Int Rep 2021; 6:501-512. [PMID: 33615076 PMCID: PMC7879094 DOI: 10.1016/j.ekir.2020.10.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 10/27/2020] [Indexed: 12/16/2022] Open
Abstract
Aboriginal and Torres Strait Islander Australians (Indigenous Australians) suffer some of the highest rates of chronic kidney disease (CKD) in the world. Among Indigenous Australians in remote areas of the Northern Territory, prevalence rates for renal replacement therapy (RRT) are up to 30 times higher than national prevalence. Anemia among patients with CKD is a common complication. Iron deficiency is one of the major causes. Iron deficiency is also one of the key causes of poor response to the mainstay of anemia therapy with erythropoiesis-stimulating agents (ESAs). Therefore, the effective management of anemia in people with CKD is largely dependent on effective identification and correction of iron deficiency. The current identification of iron deficiency in routine clinical practice is dependent on 2 surrogate markers of iron status: serum ferritin concentration and transferrin saturation (TSAT). However, questions exist regarding the use of serum ferritin concentration in people with CKD because it is an acute-phase reactant that can be raised in the context of acute and chronic inflammation. Serum ferritin concentration among Indigenous Australians receiving RRT is often markedly elevated and falls outside reference ranges within most national and international guidelines for iron therapy for people with CKD. This review explores published data on the challenges of managing anemia in Indigenous people with CKD and the need for future research on the efficacy and safety of treatment of anemia of CKD in patients with high ferritin and evidence iron deficiency.
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Affiliation(s)
- Sandawana William Majoni
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia
- Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia
| | - Paul D. Lawton
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia
| | - Geetha Rathnayake
- Flinders University and Northern Territory Medical Program, Royal Darwin Hospital Campus, Darwin, Northern Territory, Australia
- Chemical Pathology–Territory Pathology, Department of Health, Northern Territory Government, Northern Territory, Australia
| | - Federica Barzi
- Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia
| | - Jaquelyne T. Hughes
- Department of Nephrology, Division of Medicine, Royal Darwin Hospital, Darwin, Northern Territory, Australia
- Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia
| | - Alan Cass
- Wellbeing and Preventable Chronic Diseases, Menzies School of Health Research, Charles Darwin University, Northern Territory, Australia
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14
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Douglas NM, Hennessy JN, Currie BJ, Baird RW. Trends in Bacteremia Over 2 Decades in the Top End of the Northern Territory of Australia. Open Forum Infect Dis 2020; 7:ofaa472. [PMID: 33204758 PMCID: PMC7651056 DOI: 10.1093/ofid/ofaa472] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 10/01/2020] [Indexed: 11/14/2022] Open
Abstract
Background Information on the local distribution of bloodstream pathogens helps to guide empiric antibiotic selection and can generate hypotheses regarding the effectiveness of infection prevention practices. We assessed trends in bacterial blood culture isolates at Royal Darwin Hospital (RDH) in the Northern Territory of Australia between 1999 and 2019. Methods Species identification was extracted for all blood cultures first registered at RDH. Thirteen organisms were selected for focused analysis. Trends were examined graphically and using univariable linear regression. Results Between 1999 and 2019, 189 577 blood cultures from 65 276 patients were processed at RDH. Overall, 6.72% (12 747/189 577) of blood cultures contained a bacterial pathogen. Staphylococcus aureus was the most common cause of bacteremia during the first decade, with an estimated incidence of 96.6 episodes per 100 000 person-years (py; 95% CI, 72.2-121/100 000 py) in 1999. Since 2009, S. aureus bacteremia has declined markedly, whereas there has been an inexorable rise in Escherichia coli bacteremia (30.1 to 74.7/100 000 py between 1999 and 2019; P < .001), particularly in older adults. Since 2017, E. coli has been more common than S. aureus. Rates of Streptococcus pneumoniae bacteremia have reduced dramatically in children, while Burkholderia pseudomallei remained the fourth most common bloodstream isolate overall. Conclusions The incidence of S. aureus bacteremia, though high by international standards, is declining at RDH, possibly in part due to a sustained focus on both community and hospital infection prevention practices. Gram-negative bacteremia, particularly due to E. coli, is becoming more common, and the trend will likely continue given our aging population.
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Affiliation(s)
- Nicholas M Douglas
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Territory Pathology, Royal Darwin Hospital, Darwin, Northern Territory, Australia.,Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Jann N Hennessy
- Territory Pathology, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Bart J Currie
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
| | - Rob W Baird
- Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia.,Territory Pathology, Royal Darwin Hospital, Darwin, Northern Territory, Australia.,Department of Infectious Diseases, Royal Darwin Hospital, Darwin, Northern Territory, Australia
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15
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Abstract
The causative agent of melioidosis, Burkholderia pseudomallei, a tier 1 select agent, is endemic in Southeast Asia and northern Australia, with increased incidence associated with high levels of rainfall. Increasing reports of this condition have occurred worldwide, with estimates of up to 165,000 cases and 89,000 deaths per year. The ecological niche of the organism has yet to be clearly defined, although the organism is associated with soil and water. The culture of appropriate clinical material remains the mainstay of laboratory diagnosis. Identification is best done by phenotypic methods, although mass spectrometric methods have been described. Serology has a limited diagnostic role. Direct molecular and antigen detection methods have limited availability and sensitivity. Clinical presentations of melioidosis range from acute bacteremic pneumonia to disseminated visceral abscesses and localized infections. Transmission is by direct inoculation, inhalation, or ingestion. Risk factors for melioidosis include male sex, diabetes mellitus, alcohol abuse, and immunosuppression. The organism is well adapted to intracellular survival, with numerous virulence mechanisms. Immunity likely requires innate and adaptive responses. The principles of management of this condition are drainage and debridement of infected material and appropriate antimicrobial therapy. Global mortality rates vary between 9% and 70%. Research into vaccine development is ongoing.
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Affiliation(s)
- I Gassiep
- Pathology Queensland, Townsville Hospital, Townsville, Queensland, Australia
- Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
| | - M Armstrong
- Pathology Queensland, Townsville Hospital, Townsville, Queensland, Australia
| | - R Norton
- Pathology Queensland, Townsville Hospital, Townsville, Queensland, Australia
- Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
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16
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Davidson N, Grigg MJ, Mcguinness SL, Baird RJ, Anstey NM. Safety and Outcomes of Linezolid Use for Nocardiosis. Open Forum Infect Dis 2020; 7:ofaa090. [PMID: 32258209 PMCID: PMC7112726 DOI: 10.1093/ofid/ofaa090] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 03/13/2020] [Indexed: 11/12/2022] Open
Abstract
Background Tropical Australia has a high incidence of nocardiosis, with high rates of intrinsic antimicrobial resistance. Linezolid, the only antimicrobial to which all local Nocardia species are susceptible, has been recommended in empirical combination treatment regimens for moderate-severe Nocardia infections at Royal Darwin Hospital (RDH) since 2014. We report the safety and efficacy of linezolid use for nocardiosis in this setting. Methods We identified cases through a retrospective review of all RDH Nocardia isolates from December 2014 to August 2018 and included 5 linezolid-treated cases from a previous cohort. Laboratory, demographic, and clinical data were included in the primary analysis of safety and treatment outcomes. Results Between 2014 and 2018, Nocardia was isolated from 35 individuals; 28 (80%) had clinically significant infection and 23 (82%) received treatment. All isolates were linezolid-susceptible. Safety and efficacy were assessed for 20 patients receiving linezolid-containing regimens and 8 receiving nonlinezolid regimens. Median linezolid induction therapy duration was 28 days. Common adverse effects in those receiving linezolid were thrombocytopenia (45%) and anemia (40%). Adverse events prompted discontinuation of trimethoprim-sulfamethoxazole more often than linezolid (40% vs 20%). Linezolid therapeutic drug monitoring was used in 1 patient, with successful dose reduction and outcome. There was no difference in 30-day survival between those treated with linezolid (90%) vs no linezolid (87%). One Nocardia-attributed death occurred during linezolid therapy. Conclusions Linezolid is safe and efficacious in empirical treatment for moderate to severe nocardiosis in a monitored hospital setting, with 100% drug susceptibility and no difference in adverse events or outcomes compared with nonlinezolid regimens.
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Affiliation(s)
- Natalie Davidson
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, NT, Australia
| | | | | | - Robert J Baird
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, NT, Australia.,Department Microbiology, Royal Darwin Hospital, Darwin, NT, Australia
| | - Nicholas M Anstey
- Department of Infectious Diseases, Royal Darwin Hospital, Darwin, NT, Australia.,Menzies School of Health Research, Darwin, NT, Australia
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17
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Luangasanatip N, Flasche S, Dance DAB, Limmathurotsakul D, Currie BJ, Mukhopadhyay C, Atkins T, Titball R, Jit M. The global impact and cost-effectiveness of a melioidosis vaccine. BMC Med 2019; 17:129. [PMID: 31272431 PMCID: PMC6610909 DOI: 10.1186/s12916-019-1358-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 06/04/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Every year, 90,000 people may die from melioidosis. Vaccine candidates have not proceeded past animal studies, partly due to uncertainty around the potential market size. This study aims to estimate the potential impact, cost-effectiveness and market size for melioidosis vaccines. METHODS Age-structured decision tree models with country-specific inputs were used to estimate net costs and health benefits of vaccination, with health measured in quality-adjusted life years (QALYs). Four target groups of people living in endemic regions were considered: (i) people aged over 45 years with chronic renal disease, (ii) people aged over 45 years with diabetes, (iii) people aged over 45 years with diabetes and/or chronic renal disease, (iv) everyone aged over 45 years. Melioidosis risk was estimated using Bayesian evidence synthesis of 12 observational studies. In the base case, vaccines were assumed to have 80% efficacy, to have 5-year mean protective duration and to cost USD10.20-338.20 per vaccine. RESULTS Vaccination could be cost-effective (with incremental cost-effectiveness ratio below GDP per capita) in 61/83 countries/territories with local melioidosis transmission. In these 61 countries/territories, vaccination could avert 68,000 lost QALYs, 8300 cases and 4400 deaths per vaccinated age cohort, at an incremental cost of USD59.6 million. Strategy (ii) was optimal in most regions. The vaccine market may be worth USD268 million per year at its threshold cost-effective price in each country/territory. CONCLUSIONS There is a viable melioidosis vaccine market, with cost-effective vaccine strategies in most countries/territories with local transmission.
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Affiliation(s)
- Nantasit Luangasanatip
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK.
- College of Life and Environmental Sciences, University of Exeter, Exeter, UK.
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
| | - Stefan Flasche
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
| | - David A B Dance
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Vientiane, Lao People's Democratic Republic
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
- Faculty of Infectious and Tropical Disease, London School of Hygiene and Tropical Medicine, London, UK
| | - Direk Limmathurotsakul
- Mahidol-Oxford Tropical Medicine Research Unit, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
- Department of Tropical Hygiene, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Bart J Currie
- Global and Tropical Health Division, Menzies School of Health Research, Darwin, Australia
- Department of Infectious Diseases and Northern Territory Medical Program, Royal Darwin Hospital, Darwin, Australia
| | - Chiranjay Mukhopadhyay
- Department of Microbiology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Tim Atkins
- College of Life and Environmental Sciences, University of Exeter, Exeter, UK
- Defence Science and Technology Laboratory, Salisbury, UK
| | - Richard Titball
- College of Life and Environmental Sciences, University of Exeter, Exeter, UK
| | - Mark Jit
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
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18
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Chau KWT, Smith S, Kang K, Dheda S, Hanson J. Antibiotic Prophylaxis for Melioidosis in Patients Receiving Hemodialysis in the Tropics? One Size Does Not Fit All. Am J Trop Med Hyg 2018; 99:597-600. [PMID: 30014827 DOI: 10.4269/ajtmh.18-0421] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Melioidosis has a high case fatality rate and is more common in patients with chronic kidney disease. Some authors recommended trimethoprim/sulfamethoxazole (TMP/SMX) prophylaxis for all hemodialysis (HD) patients during the wet season in melioidosis-endemic regions. Historical data were reviewed to determine if TMP/SMX prophylaxis was warranted in the HD population of Far North Queensland, Australia. Between 1997 and 2017, there were 242 culture-confirmed cases of melioidosis in the region, three (1.2%) occurred in HD patients; all survived without intensive care support. During the study period, there were 843 HD patients in the region with 3,024 cumulative patient years of risk. Even assuming 100% efficacy, it would have been necessary to prescribe TMP/SMX for 1,008 patient years to prevent one case of melioidosis. Given the significant additional cost and potentially life-threatening side effects of TMP/SMX therapy, clinicians should review the local epidemiology of melioidosis before the implementation of universal TMP/SMX prophylaxis in their HD population.
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Affiliation(s)
- Ken W T Chau
- Department of Medicine, Cairns Hospital, Cairns, Australia
| | - Simon Smith
- James Cook University, Cairns, Australia.,Department of Medicine, Cairns Hospital, Cairns, Australia
| | - Katherine Kang
- Department of Medicine, Cairns Hospital, Cairns, Australia
| | - Shyam Dheda
- Department of Medicine, Cairns Hospital, Cairns, Australia
| | - Josh Hanson
- The Kirby Institute, Sydney, Australia.,Department of Medicine, Cairns Hospital, Cairns, Australia
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19
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Melioidosis: An Australian Perspective. Trop Med Infect Dis 2018; 3:tropicalmed3010027. [PMID: 30274424 PMCID: PMC6136632 DOI: 10.3390/tropicalmed3010027] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 02/21/2018] [Accepted: 02/22/2018] [Indexed: 12/16/2022] Open
Abstract
Burkholderia pseudomallei is endemic in northern Australia, with cases of melioidosis most commonly occurring during the wet season in individuals with diabetes, hazardous alcohol use, and chronic kidney disease. Pneumonia is the most common presentation and the majority of patients are bacteraemic—however, infection may involve almost any organ, with the skin and soft tissues, genitourinary system, visceral organs, and bone and joints affected most commonly. Central nervous system involvement is rarer, but has a high attributable mortality. Increased awareness of the disease amongst healthcare providers, ready access to appropriate antibiotic therapy and high-quality intensive care services has resulted in a sharp decline in the case fatality rate over the last 20 years. Further improvement in clinical outcomes will require a greater understanding of the disease′s pathophysiology, its optimal management, and more effective strategies for its prevention.
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