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Lerman JB, Cyr DD, Chiswell K, Tobin RS, Fudim M, Pokorney SD, Mentz RJ, Samsky MD. The Use of the Multisensor HeartLogic Algorithm for Heart Failure Remote Monitoring in Patients With Left Ventricular Assist Devices. ASAIO J 2023; 69:e351-e353. [PMID: 37097988 DOI: 10.1097/mat.0000000000001946] [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] [Subscribe] [Scholar Register] [Indexed: 04/26/2023] Open
Affiliation(s)
- Joseph B Lerman
- From the Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina
- Duke Clinical Research Institute, Durham, North Carolina
| | - Derek D Cyr
- Duke Clinical Research Institute, Durham, North Carolina
| | - Karen Chiswell
- Duke Clinical Research Institute, Durham, North Carolina
| | - Rachel S Tobin
- Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Marat Fudim
- From the Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina
- Duke Clinical Research Institute, Durham, North Carolina
| | - Sean D Pokorney
- From the Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina
| | - Robert J Mentz
- From the Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina
- Duke Clinical Research Institute, Durham, North Carolina
| | - Marc D Samsky
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut
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Tobin RS, Cosiano MF, O'Connor CM, Fiuzat M, Granger BB, Rogers JG, Tulsky JA, Steinhauser KE, Mentz RJ. Spirituality in Patients With Heart Failure. JACC Heart Fail 2022; 10:217-226. [PMID: 35361439 DOI: 10.1016/j.jchf.2022.01.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 01/03/2022] [Accepted: 01/26/2022] [Indexed: 06/14/2023]
Abstract
With advances in heart failure (HF) treatment, patients are living longer, putting further emphasis on quality of life (QOL) and the role of palliative care principles in their care. Spirituality is a core domain of palliative care, best defined as a dynamic, multidimensional aspect of oneself for which 1 dimension is that of finding meaning and purpose. There are substantial data describing the role of spirituality in patients with cancer but a relative paucity of studies in HF. In this review article, we explore the current knowledge of spirituality in patients with HF; describe associations among spirituality, QOL, and HF outcomes; and propose clinical applications and future directions regarding spiritual care in this population. Studies suggest that spirituality serves as a potential target for palliative care interventions to improve QOL, caregiver support, and patient outcomes including rehospitalization and mortality. We suggest the development of a spirituality-screening tool, similar to the Patient Health Questionnaire-2 used to screen for depression, to identify patients with HF at risk for spiritual distress. Novel tools are soon to be validated by members of our group. Given spirituality in HF remains less well studied compared with other patient populations, further controlled trials and uniform measures of spirituality are needed to understand its impact better.
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Affiliation(s)
- Rachel S Tobin
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.
| | - Michael F Cosiano
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | | | - Mona Fiuzat
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Bradi B Granger
- Duke School of Nursing, Duke University, Durham, North Carolina, USA
| | - Joseph G Rogers
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA; Texas Heart Institute, Houston, Texas, USA
| | - James A Tulsky
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute and Division of Palliative Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Karen E Steinhauser
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA; Department of Population Health Sciences, Duke University School of Medicine, Durham, North Carolina, USA
| | - Robert J Mentz
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA; Duke Clinical Research Institute, Durham, North Carolina, USA
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Tobin RS, Samsky MD, Kuchibhatla M, O'Connor CM, Fiuzat M, Warraich HJ, Anstrom KJ, Granger BB, Mark DB, Tulsky JA, Rogers JG, Mentz RJ, Johnson KS. Race Differences in Quality of Life following a Palliative Care Intervention in Patients with Advanced Heart Failure: Insights from the Palliative Care in Heart Failure Trial. J Palliat Med 2022; 25:296-300. [PMID: 34851740 PMCID: PMC9022123 DOI: 10.1089/jpm.2021.0220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Introduction: Black patients have a higher incidence of heart failure (HF) and worse outcomes than white patients. Guidelines recommend palliative care for patients with advanced HF, but no studies have examined outcomes in a black patient cohort. Methods: This is a post hoc analysis of the Palliative Care in Heart Failure trial, which randomized patients to usual care plus a palliative care intervention (UC+PAL) or usual care (UC). Quality of life (QoL) was measured using Kansas City Cardiomyopathy Questionnaire (KCCQ) and Functional Assessment of Chronic Illness Therapy-Palliative Care scale (FACIT-Pal). Results: Black patients represented 41% of the 148 patients. At six months, QoL improved more in UC+PAL than UC for both racial subgroups. The difference was greater for black than white patients (difference: KCCQ 10.8 vs. 2.5; FACIT-Pal: 14.8 vs. 3.9). However, the findings were not statistically significant. Conclusions: Larger studies are needed to assess the benefits of palliative care for black patients with HF. ClinicalTrials.gov Identifier: NCT01589601.
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Affiliation(s)
- Rachel S. Tobin
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.,Address correspondence to: Rachel S. Tobin, MD, Department of Medicine, Duke University School of Medicine, 8254 Duke North-DUMC, 3182 Erwin Road, Durham, NC 27710, USA
| | - Marc D. Samsky
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.,Division of Cardiology, Duke Clinical Research Institute, Durham, North Carolina, USA
| | - Maragatha Kuchibhatla
- Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, North Carolina, USA
| | | | - Mona Fiuzat
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Haider J. Warraich
- Division of Cardiovascular Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School and Cardiology Section, Boston, Massachusetts, USA
| | - Kevin J. Anstrom
- Division of Cardiology, Duke Clinical Research Institute, Durham, North Carolina, USA.,Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, North Carolina, USA
| | - Bradi B. Granger
- Duke School of Nursing, Duke University, Durham, North Carolina, USA
| | - Daniel B. Mark
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.,Division of Cardiology, Duke Clinical Research Institute, Durham, North Carolina, USA
| | - James A. Tulsky
- Department of Psychosocial Oncology and Palliative Care, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.,Division of Palliative Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Joseph G. Rogers
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.,Division of Cardiology, Duke Clinical Research Institute, Durham, North Carolina, USA
| | - Robert J. Mentz
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.,Division of Cardiology, Duke Clinical Research Institute, Durham, North Carolina, USA
| | - Kimberly S. Johnson
- Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA.,Division of Geriatrics, Geriatrics Research Education and Clinical Center, Durham VA Medical Center, Durham, North Carolina, USA
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Tobin RS. Temporomandibular joint implants. CMAJ 1995; 152:466-7. [PMID: 7859188 PMCID: PMC1337691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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Tarlo SM, Fradkin A, Tobin RS. Skin testing with extracts of fungal species derived from the homes of allergy clinic patients in Toronto, Canada. Clin Allergy 1988; 18:45-52. [PMID: 3349592 DOI: 10.1111/j.1365-2222.1988.tb02842.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Airborne fungi in the homes of patients with allergic rhinitis or asthma, from a Toronto Allergy Clinic population, were isolated, quantified and identified to species. Allergen extracts were prepared from sixteen of these isolated species and used for skin-prick testing of twenty-six patients. Fourteen of the total patients reacted to one or more of these extracts at 1:10 (w/v) concentrations. The most common positive skin responses (8/14 to 6/14) were found for Cladosporium cladosporioides, Alternaria tenuis, C. sphaerospermum, and Fusarium sp. The two Cladosporium species were also most commonly isolated in homes, but A. tenuis and Fusarium sp. were found only in 4% and less than 1% of the air samples, respectively. Epicoccum purpurascens and C. herbarum, which were isolated on approximately 10% of the plates, showed fewer skin reactions compared with the above. Positive skin-test response to the other ten study extracts ranged from 5/14 for two species of Aspergillus and Phoma glomerata, to 1/14 for Penicillium viridicatum; of these species, Aspergillus fumigatus was isolated in 3% of the home samples, the others were less than 1%. The findings suggest that fungal antigens from species found in homes are commonly associated with skin sensitization in an allergy clinic population with upper or lower respiratory allergy. No specific relationships were found, however, between the prevalence of fungal species in the home environment and their prevalence as skin-test allergens.
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Affiliation(s)
- S M Tarlo
- Toronto General Hospital, Ontario, Canada
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Wittich GR, van Sonnenberg E, Willson SA, Tobin RS, Cubberley DA, Marx MQ. Computed tomography of peripancreatic fat planes. Eur J Radiol 1987; 7:253-6. [PMID: 3691542] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Obliteration of peripancreatic fat planes usually is considered an indicator of peripancreatic tumour infiltration in the presence of a malignant mass, or of inflammation of peripancreatic tissues in patients with pancreatitis. However, absence of peripancreatic fat planes also may be found in patients without evidence of pancreatic disease. Hence, CT scans of 125 patients without clinical or computed tomographic evidence of pancreatic disease were evaluated to assess normal variations in the anatomy of the pancreas and its relation to surrounding vessels and bowel loops. The fat plane separating the superior mesenteric artery from the pancreas was preserved in 100% of patients. Conversely, fat planes between the pancreas and the superior mesenteric vein, inferior vena cava, and adjacent bowel loops were partially or totally obliterated in 13% to 50% of patients. It is concluded that the absence of fat around the superior mesenteric artery is highly suggestive of pathologic changes of the pancreas, while the lack of fat planes between the pancreas and other splanchnic vessels or bowel loops frequently is normal, and therefore, is an unreliable sign of pancreatic disease. The applications of these findings to the assessment of tumour resectability by CT, and to CT scanning techniques, are discussed.
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Affiliation(s)
- G R Wittich
- Department of Radiology, University of California San Diego Medical Center
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Tobin RS, Vogelzang RL, Gore RM, Keigley B. A comparative study of computed tomography and ERCP in pancreaticobiliary disease. J Comput Tomogr 1987; 11:261-6. [PMID: 3608551 DOI: 10.1016/0149-936x(87)90092-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Fifty-seven patients with suspected pancreaticobiliary pathology constituting a clinical subset in whom the diagnosis was problematic or nonspecific were evaluated with computed tomography and ERCP. The relative sensitivities, specificities, and accuracies of the two tests were compared. Computed tomography was successful in obtaining a diagnostic examination in 100% and ERCP was technically successful in 75%. Both tests were equally accurate in detecting an abnormality (computed tomography 95.7%; ERCP 95.3%) and offering a correct diagnosis (computed tomography 72%; ERCP 70%). Sensitivity and specificity of the two tests for detection of an abnormality was computed tomography 100% and 91.3%; ERCP 91.7% and 100%. Sensitivity and specificity for the correct diagnosis was computed tomography 59% and 91.3%; ERCP 46% and 100%. Computed tomography was also superior to ERCP in making a correct diagnosis in pancreatic carcinoma (80% versus 63%) and pancreatitis (75% versus 50%). Based on these results we conclude that computed tomography utilizing high doses of intravenous contrast material and thin collimation is the preferred screening examination for pancreaticobiliary disease. ERCP should be reserved for those cases where the pancreaticobiliary disease. ERCP should be reserved for those cases where the diagnosis on computed tomography is obscure or uncertain and/or the pancreatic or biliary ductal anatomy requires direct contrast imaging.
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Vogelzang RL, Tobin RS, Burstein S, Anschuetz SL, Marzano M, Kozlowski JM. Transcatheter intracavitary fibrinolysis of infected extravascular hematomas. AJR Am J Roentgenol 1987; 148:378-80. [PMID: 3492117 DOI: 10.2214/ajr.148.2.378] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Fradkin A, Tarlo SM, Tobin RS, Tucic-Porretta M, Malloch D. Species identification of airborne molds and its significance for the detection of indoor pollution. JAPCA 1987; 37:51-3. [PMID: 3819177 DOI: 10.1080/08940630.1987.10466201] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Seyfried PL, Tobin RS, Brown NE, Ness PF. A prospective study of swimming-related illness. II. Morbidity and the microbiological quality of water. Am J Public Health 1985; 75:1071-5. [PMID: 4025657 PMCID: PMC1646333 DOI: 10.2105/ajph.75.9.1071] [Citation(s) in RCA: 79] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A prospective cohort epidemiological-microbiological study was carried out at 10 beaches in Ontario, Canada. Lake water and sediment samples collected at the beaches were analyzed for fecal coliforms, fecal streptococci, heterotrophic bacteria, Pseudomonas aeruginosa, and total staphylococci. Mean fecal coliform levels in the surface water of the lakes were within accepted guidelines. Bacterial densities were found to be approximately 10 times higher in the sediment than in the corresponding surface water samples. Morbidity among swimmers was shown to be related to staphylococcal counts, to fecal coliform levels, and, somewhat less strongly, to fecal streptococcal counts. Total staphylococci appeared to be more consistent indicators for predicting total morbidity rates among swimmers.
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Abstract
During the summer of 1980, both swimmers and nonswimmers were enlisted in a prospective epidemiological study to determine the relationship between swimming, water quality, and the incidence of illness. Results of 4,537 telephone follow-up interviews showed that crude morbidity rates were 69.6 per 1,000 swimmers versus 29.5 per 1,000 nonswimmers. Swimmers experienced respiratory ailments most frequently, followed by gastrointestinal, eye, ear, skin, and allergenic symptoms, respectively.
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Dutka BJ, Walsh K, Ewan P, El-Shaarawi A, Tobin RS. Incidence of Legionella organisms in selected Ontario (Canada) cities. Sci Total Environ 1984; 39:237-249. [PMID: 6523127 DOI: 10.1016/0048-9697(84)90081-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The distribution of Legionella pneumophila in water inside buildings was examined by means of culture methods. Cooling tower sumps and condenser valves harboured the organism at the highest frequency and in the highest concentrations. The bacterium was also frequently isolated from potable water systems, including hot and cold mixed taps, drinking water fountains and showers. When water quality parameters were examined, only elevated pH, total particulate nitrogen and alkalinity were correlated with the occurrence of L. pneumophila. Survival of the organism in water was increased at slightly basic pH and lower temperatures. The proliferation of the organism in water within buildings is probably due to a number of interrelated environmental factors that influence its survival and growth.
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Tobin RS, Junkins EA, Eaton FE. Survey of the use of activated carbon water filters in Canadian homes. Can J Public Health 1984; 75:384-7. [PMID: 6498726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Murray GE, Tobin RS, Junkins B, Kushner DJ. Effect of chlorination on antibiotic resistance profiles of sewage-related bacteria. Appl Environ Microbiol 1984; 48:73-7. [PMID: 6476832 PMCID: PMC240314 DOI: 10.1128/aem.48.1.73-77.1984] [Citation(s) in RCA: 97] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
A total of 1,900 lactose-fermenting bacteria were isolated from raw sewage influent and chlorinated sewage effluent from a sewage treatment plant, as well as from chlorinated and neutralized dilute sewage, before and after a 24-h regrowth period in the laboratory. Of these isolates, 84% were resistant to one or more antibiotics. Chlorination of influent resulted in an increase in the proportion of bacteria resistant to ampicillin and cephalothin, the increase being most marked after regrowth occurred following chlorination. Of the other nine antibiotics tested, chlorination resulted in an increased proportion of bacteria resistant to some, but a decrease in the proportion resistant to the remainder. Multiple resistance was found for up to nine antibiotics, especially in regrowth populations. Identification of about 5% of the isolates showed that the highest proportion of Escherichia coli fell in untreated sewage. Some rare and potentially pathogenic species were isolated from chlorinated and regrowth samples, including Yersinia enterocolitica, Yersinia pestis, Pasteurella multocida, and Hafnia alvei. Our results indicate that chlorination, while initially lowering the total number of bacteria in sewage, may substantially increase the proportions of antibiotic-resistant, potentially pathogenic organisms.
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Seyfried PL, Brown NE, Cherwinsky CL, Jenkins GD, Cotter DA, Winner JM, Tobin RS. Impact of sewage treatment plants on surface waters. Can J Public Health 1984; 75:25-31. [PMID: 6704867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Tobin RS, Ward WM. Guidelines for Canadian recreational water quality. Can J Public Health 1984; 75:15-8. [PMID: 6704865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Tobin RS. Water treatment for the home or cottage. Can J Public Health 1984; 75:79-82. [PMID: 6704873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Robertson WJ, Tobin RS. The relationship between three potential pathogens and pollution indicator organisms in Nova Scotian coastal waters. Can J Microbiol 1983; 29:1261-9. [PMID: 6420028 DOI: 10.1139/m83-197] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Fifteen stations, in two estuaries, along the Northumberland Strait of Nova Scotia were examined between June and September 1981 for a relationship between the concentrations of commonly monitored fecal indicator bacteria and the potential pathogens Candida albicans, Pseudomonas aeruginosa, and Vibrio parahaemolyticus. Increased densities of these three organisms were usually associated with high densities of indicator bacteria. Whereas C. albicans and P. aeruginosa occur in human fecal wastes, V. parahaemolyticus is indigenous to the marine environment and positively responds to elevated nutrient levels in sewage. There is also some evidence that these bacteria survive as long or longer in marine waters than the common indicator bacteria. While membrane-filtration techniques for the enumeration of C. albicans and P. aeruginosa proved satisfactory, a V. parahaemolyticus membrane-filtration method lacked specificity and was supplemented by a most-probable-number method. In marine recreational and shellfish waters, these three organisms could complement fecal coliforms and fecal streptococci as indicators of human fecal contamination.
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Tobin RS, Smith DK, Lindsay JA. Effects of activated carbon and bacteriostatic filters on microbiological quality of drinking water. Appl Environ Microbiol 1981; 41:646-51. [PMID: 6784673 PMCID: PMC243753 DOI: 10.1128/aem.41.3.646-651.1981] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Three activated carbon filters for point-of-use water treatment were tested in laboratory and field studies for chemical removal and microbiological effects on water. All removed free available chlorine in municipally treated water to below the limit of detection, but removed only about 50 to 70% of the total available chlorine and 4 to 33% of the total organic carbon. Standard plate count bacteria in the effluent increased steadily with time for 3 weeks and remained elevated over the 8-week period of the study. Total coliform bacteria were found to persist and proliferate on the filters for several days after transient contamination of the influent water. Silver-containing activated carbon filters suppressed total coliform but not total bacterial growth. Pseudomonas aeruginosa was recovered from the effluents of all filters at some time during the tests.
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Tobin RS, Lomax P, Kushner DJ. Comparison of nine brands of membrane filter and the most-probable-number methods for total coliform enumeration in sewage-contaminated drinking water. Appl Environ Microbiol 1980; 40:186-91. [PMID: 7469407 PMCID: PMC291551 DOI: 10.1128/aem.40.2.186-191.1980] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Nine different brands of membrane filter were compared in the membrane filtration (MF) method, and those with the highest yields were compared against the most-probable-number (MPN) multiple-tube method for total coliform enumeration in simulated sewage-contaminated tap water. The water was chlorinated for 30 min to subject the organisms to stresses similar to those encountered during treatment and distribution of drinking water. Significant differences were observed among membranes in four of the six experiments, with two- to four-times-higher recoveries between the membranes at each extreme of recovery. When results from the membranes with the highest total coliform recovery rate were compared with the MPN results, the MF results were found significantly higher in one experiment and equivalent to the MPN results in the other five experiments. A comparison was made of the species enumerated by these methods; in general the two methods enumerated a similar spectrum of organisms, with some indication that the MF method was subject to greater interference by Aeromonas.
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Tobin RS. Should cost be a factor in personal medical care? N Engl J Med 1980; 303:288. [PMID: 7383125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Tobin RS, Dutka BJ. Comparison of the surface structure, metal binding, and fecal coliform recoveries of nine membrane filters. Appl Environ Microbiol 1977; 34:69-79. [PMID: 329763 PMCID: PMC242591 DOI: 10.1128/aem.34.1.69-79.1977] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
A comparative study was made of nine commonly used membrane filters from five manufacturers, all recommended for enumeration of coliform bacteria. Bacterial recoveries and flow rates were examined from three types of water and were found to correlate with the surface pore structure determined by scanning electron microscopy. The sorption of metals was also determined. The results of these studies indicate that the five best membranes for fecal coliform recovery could be placed in two groups: Millipore HC and Gelman, followed by Johns-Manville SG and AG and Sartorius 13806.
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Tobin RS, Seligy VL. Characterization of chromatin-bound erythrocyte histone V (f2c). Synthesis, acetylation, and phosphorylation. J Biol Chem 1975; 250:358-64. [PMID: 1112776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Synthesis and enzymatic modification of histone V was 1 order of magnitude lower in mature gander erythrocytes as compared with immature enriched cells hwich were capable of DNA synthesis. Application of shallow, linear gradient chromatography was used to demonstrate qualitative changes as well. This technique permitted the separation of newly synthesized and phosphorylated histone V from older, less phosphorylated molecules but did not discriminate between acetylated species. The most easily eluted fractions were those most recently synthesized, acetylated, and phosphorylated. While lysine chased into the other subfractions of histone V, phosphate did not, indicating a dephosphorylation step in the immature cells. Acetylation of histone V which occurs at a very low level was closely related to its synthesis. No differences in molecular weights or amino acid compositions were apparent, and behavior on polyacrylamide gels was similar to whole histone V. It is proposed that phosphorylation of histone V may play an important role in the modulation of the effect of histone V in immature cells on condensation and template restriction of chromatin which occurs in the terminal stages of differentiation of the avian erythroid cells.
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