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Anstey MH, Mitchell IA, Corke C, Murray L, Mitchell M, Udy A, Sarode V, Nguyen N, Flower O, Ho KM, Litton E, Wibrow B, Norman R. Intensive care doctors and nurses personal preferences for Intensive Care, as compared to the general population: a discrete choice experiment. Crit Care 2021; 25:287. [PMID: 34376239 PMCID: PMC8353726 DOI: 10.1186/s13054-021-03712-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Accepted: 07/28/2021] [Indexed: 11/11/2022]
Abstract
Background To test the hypothesis that Intensive Care Unit (ICU) doctors and nurses differ in their personal preferences for treatment from the general population, and whether doctors and nurses make different choices when thinking about themselves, as compared to when they are treating a patient. Methods Cross sectional, observational study conducted in 13 ICUs in Australia in 2017 using a discrete choice experiment survey. Respondents completed a series of choice sets, based on hypothetical situations which varied in the severity or likelihood of: death, cognitive impairment, need for prolonged treatment, need for assistance with care or requiring residential care. Results A total of 980 ICU staff (233 doctors and 747 nurses) participated in the study. ICU staff place the highest value on avoiding ending up in a dependent state. The ICU staff were more likely to choose to discontinue therapy when the prognosis was worse, compared with the general population. There was consensus between ICU staff personal views and the treatment pathway likely to be followed in 69% of the choices considered by nurses and 70% of those faced by doctors. In 27% (1614/5945 responses) of the nurses and 23% of the doctors (435/1870 responses), they felt that aggressive treatment would be continued for the hypothetical patient but they would not want that for themselves. Conclusion The likelihood of returning to independence (or not requiring care assistance) was reported as the most important factor for ICU staff (and the general population) in deciding whether to receive ongoing treatments. Goals of care discussions should focus on this, over likelihood of survival. Supplementary Information The online version contains supplementary material available at 10.1186/s13054-021-03712-4.
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Affiliation(s)
- Matthew H Anstey
- Intensive Care Department, Sir Charles Gairdner Hospital, Level 4 G Block, Hospital Ave, Nedlands, Perth, WA, 6009, Australia. .,School of Population Health, Curtin University, Bentley, Australia. .,School of Medicine, University of Western Australia, Crawley, Australia.
| | - Imogen A Mitchell
- Australian National University, Canberra, Australia.,Canberra Hospital, Canberra, Australia
| | | | - Lauren Murray
- Sunshine Coast University Hospital, Birtinya, QLD, Australia
| | - Marion Mitchell
- Griffith University, Griffith, QLD, Australia.,Princess Alexandra Hospital, Woolloongabba, QLD, Australia
| | | | - Vineet Sarode
- Monash University, Melbourne, Australia.,Cabrini Hospital, Melbourne, Australia
| | - Nhi Nguyen
- Nepean Hospital, Kingswood, NSW, Australia
| | | | - Kwok M Ho
- School of Medicine, University of Western Australia, Crawley, Australia.,Royal Perth Hospital, Perth, Australia.,School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
| | - Edward Litton
- School of Medicine, University of Western Australia, Crawley, Australia.,Fiona Stanley Hospital, Perth, Australia
| | - Bradley Wibrow
- Intensive Care Department, Sir Charles Gairdner Hospital, Level 4 G Block, Hospital Ave, Nedlands, Perth, WA, 6009, Australia.,School of Medicine, University of Western Australia, Crawley, Australia
| | - Richard Norman
- School of Population Health, Curtin University, Bentley, Australia
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Anstey MH, Mitchell IA, Corke C, Norman R. Population Preferences for Treatments When Critically Ill: A Discrete Choice Experiment. Patient 2021; 13:339-346. [PMID: 32009209 DOI: 10.1007/s40271-020-00410-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND Many patients in the intensive care unit are too unwell to participate in shared decision making or have not previously documented their wishes. In these situations, understanding the values of the general population could help doctors provide appropriate guidance to surrogate decision makers. METHODS Using a discrete choice experiment design, we conducted an online survey using an Australian panel. Participants were asked about their willingness to accept treatments, faced with a variety of possible outcomes and probabilities (low, moderate or high). The outcomes were across four domains: loss of functional autonomy, pain, cognitive disability and degree of burden on others. Demographic details, prior experience of intensive care unit and current health conditions were also collected. Data were analysed using logistic regression, predicting whether respondents choose to continue active treatment or not. RESULTS Nine hundred and eighty-four respondents, representative of age and sex completed the web-based survey. With the increasing likelihood of negative post-intensive care unit sequelae, there was a higher probability of the respondent preferring to stop ongoing active treatment, with the largest coefficients being on caring assistance and the need for full-time residential care. Those who identified as very religious, were younger or who had children under 5 years of age were more likely to choose to continue active treatment. CONCLUSIONS Respondents valued their independence as the most important factor in deciding whether to receive ongoing medical treatments in the intensive care unit. When clinicians are unable to obtain specific patient information, they should consider framing their decision making around the likelihood of the patient achieving functional independence rather than survival.
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Affiliation(s)
- Matthew H Anstey
- Intensive Care Department, Sir Charles Gairdner Hospital, Level 4 G Block, Hospital Ave, Nedlands, Perth, WA, 6009, Australia. .,School of Public Health, Curtin University, Perth, WA, Australia.
| | - Imogen A Mitchell
- Australian National University, Canberra, ACT, Australia.,Canberra Hospital, Canberra, ACT, Australia
| | - Charlie Corke
- University Hospital Geelong, Geelong, VIC, Australia
| | - Richard Norman
- School of Public Health, Curtin University, Perth, WA, Australia
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Khalaf A, Kecskes Z, Georgousopoulou EN, Mitchell IA. Comparison of an early warning score to single-triggering warning system for inpatient deterioration: An audit of 4089 medical emergency calls. Resuscitation 2020; 154:7-9. [DOI: 10.1016/j.resuscitation.2020.06.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 06/16/2020] [Indexed: 11/29/2022]
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Anstey MH, Litton E, Jha N, Trevenen ML, Webb S, Mitchell IA. A comparison of the opinions of intensive care unit staff and family members of the treatment intensity received by patients admitted to an intensive care unit: A multicentre survey. Aust Crit Care 2018; 32:378-382. [PMID: 30446268 DOI: 10.1016/j.aucc.2018.08.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 07/16/2018] [Accepted: 08/31/2018] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Achieving shared decision-making in the intensive care unit (ICU) is challenging because of limited patient capacity, leading to a reliance on surrogate decision-makers. Prior research shows that ICU staff members often perceive that patients receive inappropriate or futile treatments while some surrogate decision-makers of patients admitted to the ICU report inadequate communication with physicians. Therefore, understanding the perceptions of both ICU staff and surrogate decision-makers around wishes for ICU treatments is an essential component to improve these situations. OBJECTIVES The objectives of this study were to compare perceptions of ICU staff with surrogate decision-makers about the intensity and appropriateness of treatments received by patients and analyse the causes of any incongruence. METHODS A multicentred, single-day survey of staff and surrogate decision-makers of ICU inpatients was conducted across four Australian ICUs in 2014. Patients were linked to a larger prospective observational study, allowing comparison of patient outcomes. RESULTS Twelve of 32 patients were identified as having a mismatch between staff and surrogate decision-maker perceptions. For these 12 patients, all 12 surrogate decision-makers believed that the treatment intensity the patient was receiving was of the appropriate intensity and duration. Mismatched patients were more likely to be emergency admissions to ICU compared with nonmismatched patients (0.0% vs 42.1%, p = 0.012) and have longer ICU admissions (7.5 vs 3, p = 0.022). There were no significant differences in perceived communication (p = 0.61). CONCLUSIONS Family members did not share the same perceptions of treatment with ICU staff. This may result from difficulty in prognostication; challenges in conveying poor prognoses to surrogate decision-makers; and the accuracy of surrogate decision-makers.
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Affiliation(s)
- Matthew H Anstey
- Sir Charles Gairdner Hospital, Perth, Australia; Curtin University, School of Public Health, Australia.
| | - Edward Litton
- Fiona Stanley Hospital, Australia; St John of God Hospital, Subiaco, Western Australia 6009, Australia
| | - Nihar Jha
- Sir Charles Gairdner Hospital, Perth, Australia
| | | | - Steve Webb
- St John of God Hospital, Subiaco, Western Australia 6009, Australia; Monash University, Australia
| | - Imogen A Mitchell
- The Canberra Hospital, Australia; Australian National University Medical School, Australia
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Cardona-Morrell M, Kim J, Turner RM, Anstey M, Mitchell IA, Hillman K. Non-beneficial treatments in hospital at the end of life: a systematic review on extent of the problem. Int J Qual Health Care 2016; 28:456-69. [PMID: 27353273 DOI: 10.1093/intqhc/mzw060] [Citation(s) in RCA: 207] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2016] [Indexed: 12/12/2022] Open
Abstract
PURPOSE To investigate the extent of objective 'non-beneficial treatments (NBTs)' (too much) anytime in the last 6 months of life in routine hospital care. DATA SOURCES English language publications in Medline, EMBASE, PubMed, Cochrane library, and the grey literature (January 1995-April 2015). STUDY SELECTION All study types assessing objective dimensions of non-beneficial medical or surgical diagnostic, therapeutic or non-palliative procedures administered to older adults at the end of life (EOL). DATA EXTRACTION A 13-item quality score estimated independently by two authors. RESULTS OF DATA SYNTHESIS Evidence from 38 studies indicates that on average 33-38% of patients near the EOL received NBTs. Mean prevalence of resuscitation attempts for advanced stage patients was 28% (range 11-90%). Mean death in intensive care unit (ICU) was 42% (range 11-90%); and mean death rate in a hospital ward was 44.5% (range 29-60%). Mean prevalence of active measures including dialysis, radiotherapy, transfusions and life support treatment to terminal patient was 7-77% (mean 30%). Non-beneficial administration of antibiotics, cardiovascular, digestive and endocrine treatments to dying patients occurred in 11-75% (mean 38%). Non-beneficial tests were performed on 33-50% of patients with do-not-resuscitate orders. From meta-analyses, the pooled prevalence of non-beneficial ICU admission was 10% (95% CI 0-33%); for chemotherapy in the last six weeks of life was 33% (95% CI 24-41%). CONCLUSION This review has confirmed widespread use of NBTs at the EOL in acute hospitals. While a certain level of NBT is inevitable, its extent, variation and justification need further scrutiny.
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Affiliation(s)
- M Cardona-Morrell
- The Simpson Centre for Health Services Research, SWS Clinical School and the Ingham Institute for Applied Medical Research, The University of New South Wales, PO Box 6087 UNSW, Sydney NSW 1466, Australia
| | - Jch Kim
- School of Medicine, Ground floor, 30, Western Sydney University, Narellan Road & Gilchrist Drive, Campbelltown NSW 2560, Australia
| | - R M Turner
- School of Public Health and Community Medicine, Level 2, Samuels Building, Samuels Ave, The University of New South Wales, Kensington NSW 2033, Australia
| | - M Anstey
- Sir Charles Gairdner Hospital, Hospital Ave, Nedlands, Perth WA 6009, Australia
| | - I A Mitchell
- Intensive Care Unit, Building 12, Level 3, Canberra Hospital, Yamba Drive, Garran, Canberra, ACT 2605, Australia
| | - K Hillman
- The Simpson Centre for Health Services Research, SWS Clinical School and the Ingham Institute for Applied Medical Research, The University of New South Wales, PO Box 6087 UNSW, Sydney NSW 1466, Australia Intensive Care Unit, Level 2, Liverpool Hospital, Elizabeth St & Goulburn St, Liverpool NSW 2170, Australia
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Mitchell IA, Schuster ALR, Lynch T, Smith KC, Bridges JFP, Aslakson RA. Why don't end-of-life conversations go viral? A review of videos on YouTube. BMJ Support Palliat Care 2015; 7:197-204. [PMID: 26182948 DOI: 10.1136/bmjspcare-2014-000805] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 05/13/2015] [Accepted: 06/23/2015] [Indexed: 11/04/2022]
Abstract
OBJECTIVE To identify videos on YouTube concerning advance care planning (ACP) and synthesise existing video content and style elements. METHODS Informed by stakeholder engagement, two researchers searched YouTube for ACP videos using predefined search terms and snowballing techniques. Videos identified were reviewed and deemed ineligible for analysis if they: targeted healthcare professionals; contained irrelevant content; focused on viewers under the age of 18; were longer than 7 min in duration; received fewer than 150 views; were in a language other than English; or were a duplicate version. For each video, two investigators independently extracted general information as well as video content and stylistic characteristics. RESULTS The YouTube search identified 23 100 videos with 213 retrieved for assessment and 42 meeting eligibility criteria. The majority of videos had been posted to YouTube since 2010 and produced by organisations in the USA (71%). Viewership ranged from 171 to 10 642. Most videos used a documentary style and featured healthcare providers (60%) rather than patients (19%) or families (45%). A minority of videos (29%) used upbeat or hopeful music. The videos frequently focused on completing legal medical documents (86%). CONCLUSIONS None of the ACP videos on YouTube went viral and a relatively small number of them contained elements endorsed by stakeholders. In emphasising the completion of legal medical documents, videos may have failed to support more meaningful ACP. Further research is needed to understand the features of videos that will engage patients and the wider community with ACP and palliative and end-of-life care conversations.
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Affiliation(s)
- Imogen A Mitchell
- The Commonwealth Fund, Boston, Massachusetts, USA.,Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Massachusetts, USA
| | - Anne L R Schuster
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Massachusetts, USA
| | - Thomas Lynch
- Department of Anesthesiology and Critical Care Medicine and Palliative Care Program, Johns Hopkins Hospital, Baltimore, Massachusetts, USA
| | - Katherine Clegg Smith
- Department of Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health, Baltimore, Massachusetts, USA
| | - John F P Bridges
- Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health, Baltimore, Massachusetts, USA
| | - Rebecca A Aslakson
- Department of Anesthesiology and Critical Care Medicine and Palliative Care Program, Johns Hopkins Hospital, Baltimore, Massachusetts, USA
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McKay H, Mitchell IA, Sinn K, Mugridge H, Lafferty T, Van Leuvan C, Mamootil S, Abdel-Latif ME. Effect of a multifaceted intervention on documentation of vital signs and staff communication regarding deteriorating paediatric patients. J Paediatr Child Health 2013. [PMID: 23198764 DOI: 10.1111/jpc.12019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIM To evaluate the impact of newly designed Paediatric Early Warning Scores and an accompanying education package, COMPASS, on the frequency of documentation of vital signs and communication between health professionals and associated medical review in deteriorating paediatric patients. METHODS One thousand fifty-nine patients in the pre-intervention phase and 899 in the post-intervention phase were studied. The daily frequency of documentation of vital sign measurement, incidence of health professional communication and related medical reviews following clinical deterioration of a random subgroup of 262 pre-intervention and 221 post-intervention patients were studied in detail. RESULTS There were no significant differences in hospital mortality, medical emergency team reviews or unplanned admissions to critical care areas between the pre-intervention and post-intervention groups. There were significant increases in the post-intervention group for the median daily frequency of documentation of respiratory effort (0.0 (0-0) to 7.8 (5.8-12.6), P < 0.001), capillary refill (0 (0-0) to 1.1 (0-3.1), P < 0.001), blood pressure (0 (0-1.1) to 0 (0-1.6), P = 0.007) and level of consciousness (0 (0-0) to 7.8 (5.8-12.0), P < 0.001) and appropriate communication concerning patient deterioration 63 (8.5%) to 216 (40.9%), P < 0.001). There was a significant reduction in the number of children fulfilling the medical emergency team criteria (102 (38.9%) to 45 (20.4), P < 0.001). CONCLUSIONS A multifaceted intervention for the early recognition and response to clinical deterioration in children significantly improved documentation of vital signs, communication and time to medical review.
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Affiliation(s)
- Heather McKay
- Performance and Innovation, ACT Government-Health, Woden, Australian Capital Territory, Australia
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Leditschke IA, Green M, Irvine J, Bissett B, Mitchell IA. What are the barriers to mobilizing intensive care patients? Cardiopulm Phys Ther J 2012; 23:26-29. [PMID: 22807652 PMCID: PMC3286497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE Recently there has been increased interest in early mobilization of critically ill patients. Proposed benefits include improvements in respiratory function, muscle wasting, intensive care unit (ICU), and hospital length of stay. We studied the frequency of early mobilization in our intensive care unit in order to identify barriers to early mobilization. METHODS A 4-week prospective audit of 106 patients admitted to a mixed medical-surgical tertiary ICU (mean age 60 ± 20 years, mean APACHE II score 14.7 ± 7.8) was performed. Outcome measures included number of patient days mobilized, type of mobilization, adverse events, and reasons for inability to mobilize. RESULTS Patients were mobilized on 176 (54%) of 327 patient days. Adverse events occurred in 2 of 176 mobilization episodes (1.1%). In 71 (47%) of the 151 patient days where mobilization did not occur, potentially avoidable factors were identified, including vascular access devices sited in the femoral region, timing of procedures and agitation or reduced level of consciousness. CONCLUSIONS Critically ill patients can be safely mobilized for much of their ICU stay. Interventions that may allow more patients to mobilize include: changing the site of vascular catheters, careful scheduling of procedures, and improved sedation management.
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Affiliation(s)
- I Anne Leditschke
- Senior Specialist, Intensive Care Unit, Canberra Hospital; & Senior Lecturer, Australian National University, Canberra, Australia
| | - Margot Green
- Senior Physiotherapist, Intensive Care Unit, Canberra Hospital; & Physiotherapy Department, Canberra Hospital, Canberra, Australia
| | - Joelie Irvine
- Cardiorespiratory Physiotherapist, Physiotherapy Department, Canberra Hospital, Canberra, Australia
| | - Bernie Bissett
- Clinical Educator, Physiotherapy Department, Canberra Hospital; & University of Queensland, Australia
| | - Imogen A. Mitchell
- Director, Intensive Care Unit, Canberra Hospital; and Associate Professor, Australian National University, Canberra Australia
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Mitchell IA, Kulh MA, McKay H. Use of the modified early warning score in emergency medical units. Med J Aust 2011; 195:448. [PMID: 22004387 DOI: 10.5694/mja11.10995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 09/06/2011] [Indexed: 11/17/2022]
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Mitchell IA, Antoniou B, Gosper JL, Mollett J, Hurwitz MD, Bessell TL. A robust clinical review process: the catalyst for clinical governance in an Australian tertiary hospital. Med J Aust 2008; 189:451-5. [DOI: 10.5694/j.1326-5377.2008.tb02120.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 06/03/2008] [Indexed: 11/17/2022]
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Nickells J, Res J, Mitchell IA. Re-wiring an arterial line. A novel technique. Anaesth Intensive Care 2000; 28:331-2. [PMID: 10853222 DOI: 10.1177/0310057x0002800317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In cases where the loss of a small volume of blood is critical to the patient's welfare, the technique of re-wiring intra-arterial and intravenous catheters that minimize the amount of blood lost is important. A simple technique is described using the needleless systems which are now widely employed throughout hospitals.
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Affiliation(s)
- J Nickells
- Department of Intensive Care, Canberra Hospital, A.C.T
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Lamb FJ, Mitchell IA, Bennett ED. A woman with two young children and left chest pain. Lancet 1996; 347:870. [PMID: 8622395 DOI: 10.1016/s0140-6736(96)91349-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- F J Lamb
- Department of Intensive Care Medicine, St George's Hospital, London, UK
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Nealon DA, Mitchell IA, Martin L. Antimicrobial susceptibility patterns of strains of enteropathogenic Escherichia coli isolated in the New Orleans area. Antimicrob Agents Chemother 1974; 5:289-97. [PMID: 5327513 PMCID: PMC428962 DOI: 10.1128/aac.5.3.289] [Citation(s) in RCA: 139] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
A combination of trimethoprim and sulfamethoxazole was effective in the prevention and treatment of Pneumocystis carinii pneumonitis in cortisonetreated rats. Although all of 15 untreated rats died with P. carinii pneumonitis, none of 15 given trimethoprim-sulfamethoxazole prophylactically acquired the infection. After P. carinii pneumonitis was established, 9 of 14 rats recovered after treatment with trimethoprim-sulfamethoxazole compared with only 2 of 14 treated with pentamidine isethionate. Rifampin and clindamycin, separately or in combination with pentamidine, were ineffective in the prevention and treatment of P. carinii infection.
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Filippone MV, Mitchell IA, Brayton JB, Newell KW, Smith MH. Comparison of Fluorescent Antibody with Cultural Technique for Isolation of Enteropathogenic
Escherichia coli
from Swine. Appl Microbiol 1967; 15:1437-41. [PMID: 16349760 PMCID: PMC547224 DOI: 10.1128/am.15.6.1437-1441.1967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In an investigation of hogs as possible reservoirs of human strains of enteropathogenic
Escherichia coli
(EEC), 92 six-month-old grain- and garbage-fed hogs were examined on the farm and again at the packing plant. Of the 331 specimens obtained by swabbing the rectum, cecum, and edible meat carcass of these hogs, 125 were presumptively positive for EEC when screened by the fluorescent-antibody (FA) technique. These “presumptive positive” specimens then underwent extensive bacteriological examination and complete serological typing. The FA technique proved to be an easier, simpler, and more economical procedure than culture when a large number of specimens were examined for possible EEC serogroups. It was found especially valuable for identification of multiple serogroups of EEC within a single specimen. It also appeared to be more sensitive than cultural examination, since results were not dependent on the presence of large numbers of organisms in the specimen, or even on their viability. However, the FA technique was found to be less specific than culture because of cross-reactivity with antigenically related
Enterobacteriaceae
when fluorescein-labeled antisera were used. Therefore, any specimen found positive on FA examination should be considered as presumptive positive until confirmed by bacteriological examination and complete serological study.
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Affiliation(s)
- M V Filippone
- Division of Epidemiology, Department of Tropical Medicine and Public Health, Tulane University School of Medicine, New Orleans, Louisiana 70112
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