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Swerts D, Araújo A, Vulcano P, Prado B, Miyake C, Docema R, Hwang H, Peres M. Neuropalliative care in a tertiary-level hospital. BMJ Support Palliat Care 2023:spcare-2023-004499. [PMID: 38123312 DOI: 10.1136/spcare-2023-004499] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 11/29/2023] [Indexed: 12/23/2023]
Abstract
OBJECTIVES Palliative care in neurology is a recent specialty to improve the quality of life of patients with severe neurological diseases. This study aims to determine the frequency of neurological inpatients who had indication of palliative care, and evaluate the symptomatology, demographic profile, the need for supportive measures, advance directives for life and medical history of patients in a tertiary hospital in Brazil. METHODS This cross-sectional analytical study evaluated all patients admitted to the neurological semi-intensive care unit (ICU) at Hospital Israelita Albert Einstein with neurological conditions from February through August 2022. The Palliative Performance Scale (weight loss greater than 5% associated with body changes and a negative response to the question: 'Would you be surprised if the patient died within 1 year?') was used to indicate palliative care. Patients were divided into three groups: patients with palliative care needs (groupindication), patients without palliative care needs (groupwithout indication) and patients who received at least one assessment of a palliative care team (grouppalliative). Demographic data were analysed using the Χ2 test for qualitative and Kruskal-Wallis test for quantitative variables. RESULTS Of the 198 patients included in the study, 115 (58%) had palliative care needs. Only 6.9% received assessment by the palliative care team, and 9.56% had advance directives in their medical records. Patients in groupindication had a higher prevalence of symptoms, such as fatigue, depression, shortness of breath and lack of appetite, and required more supportive measures, such as oxygen therapy, enteral/parenteral nutrition, admissions at ICU and days in hospital. CONCLUSION Despite the high demand for palliative care in neurology, few patients receive this treatment, resulting in decreased quality of care. Therefore, greater integration and discussion of palliative care in neurology are needed.
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Affiliation(s)
- Diego Swerts
- Department of Neurology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Ana Araújo
- Department of Neurology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Polyana Vulcano
- Department of Neurology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Bernard Prado
- Palliative, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Caroline Miyake
- Department of Neurology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Rafael Docema
- Department of Neurology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Hye Hwang
- Department of Neurology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Mario Peres
- Department of Neurology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
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Tanco K, Prado B, Qian Y, Park M, Liu D, Guzman-Gutierrez D, Bruera E. A Comparison of Caregiver Burden of Patients with Advanced Cancer in Different Palliative Cancer Care Settings. J Palliat Med 2021; 24:1766-1775. [PMID: 33926226 DOI: 10.1089/jpm.2021.0026] [Citation(s) in RCA: 2] [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] [Indexed: 01/09/2023] Open
Abstract
Background: Informal caregivers may experience a significant burden while caring for cancer patients. Little is known about how caregiver burden varies across different palliative cancer care settings and the factors influencing it. Objectives: We compared the severity of caregiver subjective stress burden (emotional impact) among caregivers of patients seen in the outpatient supportive care center (SCC) with those being cared for in the acute palliative care unit (PCU). Secondary aims were to compare other caregiver burden dimensions, quality of life, and any association of caregiver subjective stress burden to various patient and caregiver factors. Setting and Design: Eligible patients and their informal caregivers in the SCC or PCU at a comprehensive cancer center in the USA were approached and enrolled. The Montgomery-Borgatta Caregiver Burden Scale and the Short-form 36 were used to measure burden and quality of life. Multivariate general linear regression was employed to evaluate the effect of covariates on subjective stress burden. Results: Ninety-eight dyads in the SCC and 74 dyads in the PCU were enrolled. PCU caregivers reported worse subjective stress burden (p = 0.0029) and mental health (p = 0.0299). Multivariate analysis showed correlations between subjective stress burden and caregivers' objective burden (p = 0.0136), subjective demand burden (p ≤ 0.0001), mental health (p = 0.0074), duration of caregiving (p = 0.0680), education (p = 0.0192) and with patients' anxiety (p = 0.0003) and current/recent cancer treatment (p = 0.0579). Conclusion: PCU caregivers demonstrated worse emotional burden and mental health than those in the SCC. More research is needed to tailor interventions for various caregiver burden dimensions. NCI Clinical Trial Registration Number ID: NCI-2019-01197.
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Affiliation(s)
- Kimberson Tanco
- Department of Palliative, Rehabilitation, and Integrative Medicine and The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Bernard Prado
- Oncology and Hematology Center, Hospital Israelita Albert Einstein, Sao Paulo, Brasil
| | - Yu Qian
- Tongji Medical College, Huazhong University of Science and Technology, Hubei Cancer Hospital, Wuhan, Hubei, China
| | - Minjeong Park
- US Food and Drug Administration, Bethesda, Maryland, USA
| | - Diane Liu
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Diana Guzman-Gutierrez
- Department of Palliative, Rehabilitation, and Integrative Medicine and The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Eduardo Bruera
- Department of Palliative, Rehabilitation, and Integrative Medicine and The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Arthur J, Lu Z, Nguyen K, Hui D, Prado B, Edwards T, Bruera E. Random vs Targeted Urine Drug Testing Among Patients Undergoing Long-term Opioid Treatment for Cancer Pain. JAMA Oncol 2020; 6:580-581. [PMID: 32027345 DOI: 10.1001/jamaoncol.2019.6756] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Joseph Arthur
- Department of Palliative, Rehabilitation and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston
| | - Zhanni Lu
- Department of Palliative, Rehabilitation and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston
| | - Kristy Nguyen
- Department of Palliative, Rehabilitation and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston
| | - David Hui
- Department of Palliative, Rehabilitation and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston
| | - Bernard Prado
- Department of Oncology and Hematology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Tonya Edwards
- Department of Palliative, Rehabilitation and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston
| | - Eduardo Bruera
- Department of Palliative, Rehabilitation and Integrative Medicine, The University of Texas MD Anderson Cancer Center, Houston
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Archundia D, Duwig C, Spadini L, Morel MC, Prado B, Perez MP, Orsag V, Martins JMF. Assessment of the Sulfamethoxazole mobility in natural soils and of the risk of contamination of water resources at the catchment scale. Environ Int 2019; 130:104905. [PMID: 31234002 DOI: 10.1016/j.envint.2019.104905] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 02/07/2019] [Revised: 05/30/2019] [Accepted: 06/06/2019] [Indexed: 06/09/2023]
Abstract
Sulfamethoxazole (SMX) is one of the antibiotics most commonly detected in aquatic and terrestrial environments and is still widely used, especially in low income countries. SMX is assumed to be highly mobile in soils due to its intrinsic molecular properties. Ten soils with contrasting properties and representative of the catchment soil types and land uses were collected throughout the watershed, which undergoes very rapid urban development. SMX displacement experiments were carried out in repacked columns of the 10 soils to explore SMX reactive transfer (mobility and reactivity) in order to assess the contamination risk of water resources in the context of the Bolivian Altiplano. Relevant sorption processes were identified by modelling (HYDRUS-1D) considering different sorption concepts. SMX mobility was best simulated when considering irreversible sorption as well as instantaneous and rate-limited reversible sorption, depending on the soil type. SMX mobility appeared lower in soils located upstream of the watershed (organic and acidic soils - Regosol) in relation with a higher adsorption capacity compared to the soils located downstream (lower organic carbon content - Cambisol). By combining soil column experiments and soil profiles description, this study suggests that SMX can be classified as a moderately to highly mobile compound in the studied watershed, depending principally on soil properties such as pH and OC. Potential risks of surface and groundwater pollution by SMX were thus identified in the lower part of the studied catchment, threatening Lake Titicaca water quality.
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Affiliation(s)
- D Archundia
- Univ. Grenoble Alpes, IRD, CNRS, IGE, Grenoble, France; Consejo Nacional de Ciencia y Tecnologia (CONACYT), Mexico, D.F, Mexico.; Universidad Nacional Autónoma de México-Estación Regional del Noroeste, Mexico
| | - C Duwig
- Univ. Grenoble Alpes, IRD, CNRS, IGE, Grenoble, France.
| | - L Spadini
- Univ. Grenoble Alpes, IRD, CNRS, IGE, Grenoble, France
| | - M C Morel
- Univ. Grenoble Alpes, IRD, CNRS, IGE, Grenoble, France; CNAM, Laboratoire d'analyses chimiques et bioanalyses, Paris Cedex 3, France
| | - B Prado
- Instituto de Geología, Universidad Nacional Autónoma de México, Coyoacán, Ciudad de México 04510, Mexico
| | - M P Perez
- Universidad Mayor de San Andrés, Instituto de Hidrología e Hidráulica, La Paz, Bolivia
| | - V Orsag
- Universidad Mayor de San Andrés, Facultad de Agronomía, La Paz, Bolivia
| | - J M F Martins
- Univ. Grenoble Alpes, IRD, CNRS, IGE, Grenoble, France
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Wong A, Vidal M, Prado B, Hui D, Epner M, Balankari VR, De La Cruz VJ, Cantu HP, Zapata KP, Liu DD, Williams JL, Lim T, Bruera E. Patients' Perspective of Timeliness and Usefulness of an Outpatient Supportive Care Referral at a Comprehensive Cancer Center. J Pain Symptom Manage 2019; 58:275-281. [PMID: 31029808 DOI: 10.1016/j.jpainsymman.2019.04.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 04/17/2019] [Accepted: 04/18/2019] [Indexed: 12/25/2022]
Abstract
CONTEXT Current guidelines recommend early referral to palliative care for patients with advanced cancer; however, no studies have examined the optimal timing of referral from the patients' perspective. OBJECTIVES To examine patients' perceptions of timeliness of referral and its association with survival among patients with advanced cancer referred to an outpatient supportive care (SC) clinic. METHODS This cross-sectional prospective study in an SC clinic at a comprehensive cancer center included patients aged 18 years or older with locally advanced, recurrent, or metastatic cancer. Patients were asked to complete an anonymous survey regarding the timeliness and perceived usefulness of SC referral within four weeks of their first SC consultation. RESULTS Of 253 eligible patients, 209 (83%) enrolled in the study and 200 completed the survey. Median survival was 10.3 months. Most patients (72%) perceived that referral occurred "just in time," whereas 21% felt it was "late," and 7% felt "early." A majority (83%) found the referral useful, and 88% would recommend it to other patients with cancer. The perception of being referred early was associated with lower reported levels of pain (P = 0.043), fatigue (P = 0.004), drowsiness (P = 0.005), appetite loss (P = 0.041), poor well-being (P = 0.041), and lower physical (P = 0.001) and overall symptom distress (P = 0.001). No other associations were found between perceived timeliness and usefulness and patients' baseline characteristics. CONCLUSION Most patients with a median survival of 10 months perceived that SC referral was timely and useful. Patient care needs rather than the timing of advanced cancer diagnosis drove this perception of referral timing. Lower symptom burden was associated with the perception of being referred to early.
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Affiliation(s)
- Angelique Wong
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
| | - Marieberta Vidal
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Bernard Prado
- Department of Oncology and Hematology, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - David Hui
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Margeaux Epner
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Vishidha Reddy Balankari
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Vera J De La Cruz
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Hilda P Cantu
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Kresnier Perez Zapata
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Diane D Liu
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Janet L Williams
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Taekyu Lim
- Division of Hematology and Oncology, Department of Internal Medicine, Veterans Health Service Medical Center, Seoul, South Korea
| | - Eduardo Bruera
- Department of Palliative, Rehabilitation and Integrative Medicine, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Dias L, Ribeiro K, Cota R, Amaral F, Prado B. Subcondylar osteotomy – case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.852] [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] [Indexed: 11/26/2022]
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Yennurajalingam S, Prado B, Lu Z, Naqvi S, Williams JL, Lim T, Bruera E. Outcomes of Embedded Palliative Care Outpatients Initial Consults on Timing of Palliative Care Access, Symptoms, and End-of-Life Quality Care Indicators among Advanced Nonsmall Cell Lung Cancer Patients. J Palliat Med 2018; 21:1690-1697. [PMID: 30067150 DOI: 10.1089/jpm.2018.0134] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE To determine the timing of palliative care (PC) access, symptoms, and end-of-life (EOL) quality care outcomes of patients with advanced nonsmall cell lung cancer (NSCLC) referred to outpatients embedded palliative care consults (EPC) compared with those of outpatients palliative care consults (OPC). BACKGROUND There are no studies comparing the outcomes of outpatients EPC consults with those of stand-alone OPC consults among patients with NSCLC. DESIGN The design consists of a random sample of OPC consults (January 2009 to July 2012) and EPC consults (August 2012 to June 2013) at MD Anderson Cancer Center. After the initial consult, all EPC follow-ups occurred at the OPC clinic. MEASUREMENTS Patients' characteristics, symptoms (assessed by Edmonton Symptom Assessment Scale), time from referral to first consult, overall survival from consult to death, and EOL quality care outcomes (ICU admissions, emergency center visits, hospitalizations within last 30 days, cancer treatments within last 14 days, hospice referrals, advanced care planning [ACP] discussions, and completion of advanced directives) were reviewed. RESULTS A total of 340 consults were included (EPC consults = 147). Baseline Eastern Cooperative Oncology Group status (2.2 vs. 1.9, p < 0.001) and median pain (6 vs. 5, p = 0.038) were higher among EPC consults. In EPC consults, time from referral to first consult was shorter (median: 0 day vs. 7 days, p < 0.001), and ACP discussions occurred more frequently (90% vs. 77%, p = 0.026), and earlier (median: 2 month vs. 1 month before death, p = 0.018). No other significant differences in symptoms, EOL outcomes, or survival were observed. CONCLUSIONS EPC consults plus OPC follow-ups accessed PC earlier, and had more frequent and earlier ACP discussions as compared with OPC consults. Embedded palliative cancer care might not be the ideal model for an initial PC consultation. Further research is necessary.
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Affiliation(s)
- Sriram Yennurajalingam
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Bernard Prado
- 2 Department of Oncology and Hematology, Hospital Israelita Albert Einstein , Sao Paulo, Brazil
| | - Zhanni Lu
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Syed Naqvi
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Janet L Williams
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Taekyu Lim
- 3 Division of Hematology and Oncology, Department of Internal Medicine, Veterans Health Service Medical Center , Seoul, South Korea
| | - Eduardo Bruera
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
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8
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Yennurajalingam S, Lu Z, Prado B, Williams JL, Lim KH, Bruera E. Association between Advanced Cancer Patients' Perception of Curability and Patients' Characteristics, Decisional Control Preferences, Symptoms, and End-of-Life Quality Care Outcomes. J Palliat Med 2018; 21:1609-1616. [PMID: 30048214 DOI: 10.1089/jpm.2018.0186] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 01/28/2023] Open
Abstract
BACKGROUND There are limited studies on factors associated with cancer patients' perception of curability. OBJECTIVE To examine advanced cancer patient's perception of curability and its association with patient's sociodemographic and clinical characteristics, decisional control preference (DCP), symptoms, and end-of-life quality care outcomes. DESIGN Secondary analysis of a study to determine the DCP and illness understanding of advanced cancer patients receiving palliative care (PC). MEASUREMENTS Data of the Illness Understanding survey, the Control Preference Scale, and demographics, symptoms, and end-of-life quality care outcomes were reviewed. RESULTS Of 121 patients, 104 (86%) were evaluable. Median age was 56 years, 60% were women, and 64% had a Karnofsky performance status ≤60. Thirty-seven percent inaccurately reported that their cancer was curable. Patients with accurate perception were more likely to choose a passive DCP (20% vs. 2.6%, p = 0.04). An accurate perception of curability was associated with a longer time from advanced cancer diagnosis to PC referral (odds ratio [OR] = 1.04, p = 0.04). There was a trend toward an association between inaccurate perception of curability, male gender (OR = 0.29, p = 0.09), and intensive care unit admission within 30 days of death (OR = 0.26, p = 0.09). No other significant associations between perception of curability and patients' demographics, clinical characteristics, symptoms, or end-of-life quality care outcomes were found. CONCLUSIONS Thirty-seven percent of advanced cancer patients receiving PC inaccurately perceived their disease curable. These patients were more likely to have earlier PC referrals. An accurate perception of curability was associated with passive DCP. Further studies are needed to test effective communication strategies to mitigate this misperception.
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Affiliation(s)
- Sriram Yennurajalingam
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Zhanni Lu
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Bernard Prado
- 2 Department of Oncology and Hematology, Hospital Israelita Albert Einstein , Sao Paulo, Brazil
| | - Janet L Williams
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Kyu-Hyoung Lim
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
| | - Eduardo Bruera
- 1 Department of Palliative Care and Rehabilitation Medicine, The University of Texas MD Anderson Cancer Center , Houston, Texas
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Lüneberg K, Prado B, Broszat M, Dalkmann P, Díaz D, Huebner J, Amelung W, López-Vidal Y, Siemens J, Grohmann E, Siebe C. Water flow paths are hotspots for the dissemination of antibiotic resistance in soil. Chemosphere 2018; 193:1198-1206. [PMID: 29874749 DOI: 10.1016/j.chemosphere.2017.11.143] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 08/02/2017] [Revised: 11/13/2017] [Accepted: 11/23/2017] [Indexed: 05/19/2023]
Abstract
Antibiotic resistance genes in soil pose a potential risk for human health. They can enter the soil by irrigation with untreated or insufficiently treated waste water. We hypothesized that water flow paths trigger the formation of antibiotic resistance, since they transport antibiotics, multi-resistant bacteria and free resistance genes through the soil. To test this, we irrigated soil cores once or twice with waste water only, or with waste water added with sulfamethoxazole (SMX) and ciprofloxacin (CIP). The treatments also contained a dye to stain the water flow paths and allowed to sample these separately from unstained bulk soil. The fate of SMX and CIP was assessed by sorption experiments, leachate analyses and the quantification of total and extractable SMX and CIP in soil. The abundance of resistance genes to SMX (sul1 and sul2) and to CIP (qnrB and qnrS) was quantified by qPCR. The sorption of CIP was larger than the dye and SMX. Ciprofloxacin accumulated exclusively in the water flow paths but the resistance genes qnrB and qnrS were not detectable. The SMX concentration in the water flow paths doubled the concentration of the bulk soil, as did the abundance of sul genes, particularly sul1 gene. These results suggest that flow paths do function as hotspots for the accumulation of antibiotics and trigger the formation of resistance genes in soil. Their dissemination also depends on the mobility of the antibiotic, which was much larger for SMX than for CIP.
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Affiliation(s)
- K Lüneberg
- Universidad Nacional Autónoma de México, Instituto de Geología, Ciudad Universitaria, Mexico City, Mexico.
| | - B Prado
- Universidad Nacional Autónoma de México, Instituto de Geología, Ciudad Universitaria, Mexico City, Mexico
| | - M Broszat
- University Medical Centre Freiburg, Division of Infectious Diseases, Freiburg, Germany
| | - P Dalkmann
- Institute of Crop Science and Resource Conservation - Soil Science and Soil Ecology, University of Bonn, Bonn, Germany
| | - D Díaz
- Universidad Nacional Autónoma de México, Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Mexico City, Mexico
| | - J Huebner
- University Medical Centre Freiburg, Division of Infectious Diseases, Freiburg, Germany; Hauner Children's Hospital, Division of Paediatric Infectious Diseases, Ludwig-Maximilians University Munich, Munich, Germany
| | - W Amelung
- Institute of Crop Science and Resource Conservation - Soil Science and Soil Ecology, University of Bonn, Bonn, Germany
| | - Y López-Vidal
- Universidad Nacional Autónoma de México, Departamento de Microbiología y Parasitología, Facultad de Medicina, Ciudad Universitaria, Mexico City, Mexico
| | - J Siemens
- Institute of Crop Science and Resource Conservation - Soil Science and Soil Ecology, University of Bonn, Bonn, Germany
| | - E Grohmann
- University Medical Centre Freiburg, Division of Infectious Diseases, Freiburg, Germany; Beuth University of Applied Sciences, Faculty of Life Sciences and Technology, Department of Microbiology, Berlin, Germany
| | - C Siebe
- Universidad Nacional Autónoma de México, Instituto de Geología, Ciudad Universitaria, Mexico City, Mexico
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10
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Archundia D, Duwig C, Lehembre F, Chiron S, Morel MC, Prado B, Bourdat-Deschamps M, Vince E, Aviles GF, Martins JMF. Antibiotic pollution in the Katari subcatchment of the Titicaca Lake: Major transformation products and occurrence of resistance genes. Sci Total Environ 2017; 576:671-682. [PMID: 27810754 DOI: 10.1016/j.scitotenv.2016.10.129] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 08/27/2016] [Revised: 10/17/2016] [Accepted: 10/18/2016] [Indexed: 06/06/2023]
Abstract
An increasing number of studies pointed out the ubiquitous presence of medical residues in surface and ground water as well as in soil compartments. Not only antibiotics can be found in the environment but also their transformation products about which little information is generally available. The development of bacterial resistance to antibiotics is particularly worrying as it can lead to sanitary and health problems. Studies about the dissemination of antibiotics and associated resistances in the Bolivian Altiplano are scarce. We provide baseline information on the occurrence of Sulfamethoxazole (SMX) and Trimethoprim (TMP) antibiotics as well as on the most common human SMX transformation products (TP) and on the occurrence of sulfonamide resistance genes. The studied water and soil compartments presented high levels of antibiotic pollution. This situation was shown to be mainly linked with uncontrolled discharges of treated and untreated wastewaters, resulting on the presence of antibiotics in the Titicaca Lake. SMX TPs were detected in surface waters and on soil sampled next to the wastewater treatment plant (WWTP). SMX resistance genes sulI and sulII were widely detected in the basin hydrological network, even in areas unpolluted with antibiotics. Mechanisms of co-selection of antibiotic- and metal- resistance may be involved in the prevalence of ARG's in pristine areas with no anthropogenic activity and free of antibiotic pollution.
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Affiliation(s)
- D Archundia
- Consejo Nacional de Ciencia y Tecnologia (CONACYT), México, D.F., Mexico; ERNO, Instituto de Geologia, Hermosillo, Sonora, Mexico.
| | - C Duwig
- Université Grenoble Alpes, LTHE, F38000 Grenoble, France; IRD, LTHE, F38000 Grenoble, France
| | - F Lehembre
- Université Grenoble Alpes, LTHE, F38000 Grenoble, France
| | - S Chiron
- UMR HydroSciences 5569, Montpellier University, 15 Avenue Ch. Flahault, 34093 Montpellier cedex 5, France
| | - M-C Morel
- CNAM, Laboratoire d'analyses chimiques et bio analyses, Paris Cedex 3, France
| | - B Prado
- Instituto de Geología, Universidad Nacional Autónoma de México, México, D.F., Mexico
| | - M Bourdat-Deschamps
- INRA AgroParisTech UMR ECOSYS, Bat. EGER Thiverval-Grignon, F-78850 Paris, France
| | - E Vince
- Université Grenoble Alpes, LTHE, F38000 Grenoble, France
| | - G Flores Aviles
- MMAyA, Ministerio de Medio Ambiente y Agua (Ministry of Water and Environment of Bolivia), La Paz, Bolivia
| | - J M F Martins
- Université Grenoble Alpes, LTHE, F38000 Grenoble, France; CNRS, LTHE, F38000 Grenoble, France
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Basler C, Bottichio L, Higa J, Prado B, Wong M, Bosch S. Notes From the Field: Multistate Outbreak of Human
Salmonella
Poona Infections Associated With Pet Turtle Exposure—United States, 2014. Am J Transplant 2015. [DOI: 10.1111/ajt.13681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C. Basler
- Epidemic Intelligence Service CDC Atlanta GA
- Division of Foodborne, Waterborne, and Environmental Diseases National Center for Emerging and Zoonotic Infectious Diseases CDC Atlanta GA
| | - L. Bottichio
- Division of Foodborne, Waterborne, and Environmental Diseases National Center for Emerging and Zoonotic Infectious Diseases CDC Atlanta GA
| | - J. Higa
- California Department of Public Health Sacramento CA
| | - B. Prado
- City of Long Beach Department of Health and Human Services Long Beach CA
| | - M. Wong
- California Department of Public Health Sacramento CA
| | - S. Bosch
- Division of Foodborne, Waterborne, and Environmental Diseases National Center for Emerging and Zoonotic Infectious Diseases CDC Atlanta GA
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Durán-Álvarez JC, Prado B, González D, Sánchez Y, Jiménez-Cisneros B. Environmental fate of naproxen, carbamazepine and triclosan in wastewater, surface water and wastewater irrigated soil - Results of laboratory scale experiments. Sci Total Environ 2015; 538:350-62. [PMID: 26312409 DOI: 10.1016/j.scitotenv.2015.08.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [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: 05/20/2015] [Revised: 07/15/2015] [Accepted: 08/07/2015] [Indexed: 05/12/2023]
Abstract
Lab-scale photolysis, biodegradation and transport experiments were carried out for naproxen, carbamazepine and triclosan in soil, wastewater and surface water from a region where untreated wastewater is used for agricultural irrigation. Results showed that both photolysis and biodegradation occurred for the three emerging pollutants in the tested matrices as follows: triclosan>naproxen>carbamazepine. The highest photolysis rate for the three pollutants was obtained in experiments using surface water, while biodegradation rates were higher in wastewater and soil than in surface water. Carbamazepine showed to be recalcitrant to biodegradation both in soil and water; although photolysis occurred at a higher level than biodegradation, this compound was poorly degraded by natural processes. Transport experiments showed that naproxen was the most mobile compound through the first 30cm of the soil profile; conversely, the mobility of carbamazepine and triclosan through the soil was delayed. Biodegradation of target pollutants occurred within soil columns during transport experiments. Triclosan was not detected either in leachates or the soil in columns, suggesting its complete biodegradation. Data of these experiments can be used to develop more reliable fate-on-the-field and environmental risk assessment studies.
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Affiliation(s)
- J C Durán-Álvarez
- Centro de Ciencias Aplicadas y Desarrollo Tecnológico, Universidad Nacional Autónoma de México, Mexico
| | - B Prado
- Instituto de Geología, Universidad Nacional Autónoma de México, Mexico
| | - D González
- Instituto de Ingeniería, Universidad Nacional Autónoma de México, Mexico
| | - Y Sánchez
- Instituto de Ingeniería, Universidad Nacional Autónoma de México, Mexico
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Hernández-Martínez J, Prado B, Durán-Álvarez J, Bischoff W, Siebe C. Movement of Water and Solutes in a Wastewater Irrigated Piedmont. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.proeps.2014.08.060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Prado B, Fuentes M, Verhulst N, Govaerts B, De León F, Zamora O. Fate of atrazine in a soil under different agronomic management practices. J Environ Sci Health B 2014; 49:844-855. [PMID: 25190559 DOI: 10.1080/03601234.2014.938555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Agricultural management affects the movement of atrazine in soil and leaching to groundwater. The objective of this study was to determine atrazine adsorption in a soil after 20 years of atrazine application under agronomic management practices differing in tillage practice (conventional and zero tillage), residue management (with and without residue retention) and crop rotation (wheat-maize rotation and maize monoculture). Atrazine sorption was determined using batch and column experiments. In the batch experiment, the highest distribution coefficient Kd (1.1 L kg(-1)) at 0-10 cm soil depth was observed under zero tillage, crop rotation and residue retention (conservation agriculture). The key factor in adsorption was soil organic matter content and type. This was confirmed in the column experiment, in which the highest Kd values were observed in treatments with residue retention, under either zero or conventional tillage (0.81 and 0.68 L kg(-1), respectively). Under zero tillage, the fact that there was no soil movement helped to increase the Kd. The increased soil organic matter content with conservation agriculture may be more important than preferential flow due to higher pore connectivity in the same system. The soil's capacity to adsorb 2-hydroxyatrazine (HA), an important atrazine metabolite, was more important than its capacity to adsorb atrazine, and was similar under all four management practices (Kd ranged from 30 to 40 L kg(-1)). The HA adsorption was attributed to the type and amount of clay in the soil, which is unaffected by agronomic management. Soils under conservation agriculture had higher atrazine retention potential than soils under conventional tillage, the system that predominates in the study area.
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Affiliation(s)
- B Prado
- a Instituto de Geología, UNAM , Ciudad Universitaria , México , D.F. , Mexico
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Müller K, Duwig C, Prado B, Siebe C, Hidalgo C, Etchevers J. Impact of long-term wastewater irrigation on sorption and transport of atrazine in Mexican agricultural soils. J Environ Sci Health B 2012; 47:30-41. [PMID: 22022786 DOI: 10.1080/03601234.2012.606416] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In the Mezquital Valley, Mexico, crops have been irrigated with untreated municipal wastewater for more than a century. Atrazine has been applied to maize and alfalfa grown in the area for weed control for 15 years. Our objectives were to analyse (i) how wastewater irrigation affects the filtering of atrazine, and (ii) if the length of irrigation has a significant impact. We compared atrazine sorption to Phaeozems that have been irrigated with raw wastewater for 35 (P35) and 85 (P85) years with sorption to a non-irrigated (P0) Phaeozem soil under rainfed agriculture. The use of bromide as an inert water tracer in column experiments and the subsequent analysis of the tracers' breakthrough curves allowed the calibration of the hydrodynamic parameters of a two-site non equilibrium convection-dispersion model. The quality of the irrigation water significantly altered the soils' hydrodynamic properties (hydraulic conductivity, dispersivity and the size of pores that are hydraulically active). The impacts on soil chemical properties (total organic carbon content and pH) were not significant, while the sodium adsorption ratio was significantly increased. Sorption and desorption isotherms, determined in batch and column experiments, showed enhanced atrazine sorption and reduced and slower desorption in wastewater-irrigated soils. These effects increased with the length of irrigation. The intensified sorption-desorption hysteresis in wastewater-irrigated soils indicated that the soil organic matter developed in these soils had fewer high-energy, easily accessible sorption sites available, leading to lower and slower atrazine desorption rates. This study leads to the conclusion that wastewater irrigation decreases atrazine mobility in the Mezquital valley Phaeozems by decreasing the hydraulic conductivity and increasing the soil's sorption capacity.
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Affiliation(s)
- K Müller
- The New Zealand Institute for Plant & Food Research Limited, Ruakura Research Centre, Hamilton.
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Sánchez-Mateo CC, Bonkanka CX, Prado B, Rabanal RM. Antidepressant activity of some Hypericum reflexum L. fil. extracts in the forced swimming test in mice. J Ethnopharmacol 2007; 112:115-21. [PMID: 17383128 DOI: 10.1016/j.jep.2007.02.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2006] [Revised: 01/22/2007] [Accepted: 02/07/2007] [Indexed: 05/14/2023]
Abstract
We previously reported that oral administration of the methanol extract obtained from the aerial part in blossom of Hypericum reflexum L. fil. was active in the tetrabenazine and forced swimming test. In the present study, the effect of the aqueous, butanol and chloroform fractions obtained from the methanol extract of this species on the central nervous system was investigated in mice, particularly in animal models of depression. Antidepressant activity was detected in the butanol and chloroform fractions of this species using the forced swimming test since both fractions induced a significant reduction of the immobility time, producing no effects or only a slight depression on spontaneous motor activity when assessed in a photocell activity meter. Moreover, these fractions did not alter significantly the pentobarbital-induced sleeping time. On the other hand, the chloroform fraction produced a slight but significant hypothermia and was also effective in antagonizing the ptosis induced by tetrabenazine. Furthermore, the butanol fraction produced a slight potentiation of the head twitches and syndrome induced by 5-HTP. Taken together, these data indicate that the butanol and chloroform fractions from Hypericum reflexum possess antidepressant-like effects in mice, providing further support for the traditional use of these plants in the Canary Islands folk medicine against central nervous disorders.
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Affiliation(s)
- C C Sánchez-Mateo
- Departamento de Farmacología, Facultad de Farmacia, Universidad de La Laguna, c/Astrofísico Francisco Sánchez s/n, 38071 La Laguna, Tenerife, Spain.
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Sánchez-Mateo CC, Bonkanka CX, Prado B, Rabanal RM. Antidepressant properties of some Hypericum canariense L. and Hypericum glandulosum Ait. extracts in the forced swimming test in mice. J Ethnopharmacol 2005; 97:541-547. [PMID: 15740893 DOI: 10.1016/j.jep.2004.12.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2004] [Revised: 12/06/2004] [Accepted: 12/20/2004] [Indexed: 05/24/2023]
Abstract
It has been shown in a previous work that the methanol extract obtained from the aerial part in blossom of Hypericum canariense L. and Hypericum glandulosum Ait. was active in the tetrabenazine and forced swimming test. In the present study, the central nervous effect of the aqueous, butanol and chloroform fractions obtained from the methanol extracts of these Hypericum species was investigated in mice, particularly in animal models of depression. It was found that the immobility time in the forced swimming test was significantly reduced by the butanol and chloroform fraction of both species assayed, producing no effects or only a slight depression on spontaneous motor activity when assessed in a photocell activity meter. In this regard, the efficacy of the chloroform extract from Hypericum glandulosum Ait. (500 mg/kg p.o.) in the forced swimming test was comparable to that of the tricyclic antidepressant imipramine (50 mg/kg p.o.). In addition, the Hypericum glandulosum chloroform fraction was also effective in antagonizing the ptosis induced by tetrabenazine. Moreover, Hypericum canariense butanol fraction and Hypericum glandulosum chloroform fraction produced a slight but significant hypothermia. Taken together, these data demonstrate that the butanol and chloroform fractions from Hypericum canariense and Hypericum glandulosum possess antidepressant-like effects in mice, providing further support for the traditional use of these plants in the Canary Islands folk medicine against central nervous disorders.
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Affiliation(s)
- C C Sánchez-Mateo
- Departamento de Farmacología, Facultad de Farmacia, Universidad de La Laguna, c/Astrofísico Francisco Sánchez s/n, 38071, La Laguna, Tenerife, Spain.
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Rabanal RM, Arias A, Prado B, Hernández-Pérez M, Sánchez-Mateo CC. Antimicrobial studies on three species of Hypericum from the Canary Islands. J Ethnopharmacol 2002; 81:287-292. [PMID: 12065165 DOI: 10.1016/s0378-8741(02)00083-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The antimicrobial activity of several extracts and fractions of the aerial parts of Hypericum canariense, Hypericum glandulosum and Hypericum grandifolium was investigated using the disc diffusion and broth microdilution methods against twelve reference microorganisms (eight bacterial and four fungal strains). The methanol extract and chloroform fraction of H. canariense, as well as the methanol extracts, butanol and chloroform fractions of both H. glandulosum and H. grandifolium exhibited a good antibacterial activity against four Gram-positive bacteria (Bacillus cereus var. mycoides, Micrococcus luteus, Staphylococcus aureus and Staphylococcus epidermidis) and the Gram-negative bacterium Bordetella bronchiseptica with the diameters of growth inhibition area in the range 10-25 mm and MICs values between 0.03 and 0.29 mg/ml. Neither the infusions and aqueous fractions of the species studied nor the butanol fraction of H. canariense showed any antibacterial activity against the tested microorganisms. Amongst the active extracts, the minimum inhibitory concentration (MIC) determination showed that the H. canariense chloroform fraction was the most active against M. luteus, S. aureus and S. epidermidis. No antifungal activity was seen with any of the extracts or fractions tested. The results of this study support the use of these species in Canarian traditional medicine to treat skin infections.
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Affiliation(s)
- R M Rabanal
- Departamento de Farmacología, Facultad de Farmacia, Universidad de La Laguna, 38071 La Laguna, Tenerife, Spain.
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Sánchez-Mateo CC, Prado B, Rabanal RM. Antidepressant effects of the methanol extract of several Hypericum species from the Canary Islands. J Ethnopharmacol 2002; 79:119-127. [PMID: 11744305 DOI: 10.1016/s0378-8741(01)00393-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The aim of the present study was to investigate several neuropharmacological effects of the methanol extract of the aerial parts in blossom of Hypericum canariense, H. glandulosum, H. grandifolium and H. reflexum (Hypericaceae). These extracts did not alter significantly the locomotor activity, body temperature or the pentobarbital-induced sleeping time, with the exception of H. reflexum which significantly potentiated pentobarbital-induced sleeping time at both doses assayed (500 and 1000 mg/kg p.o.). Additionally, neither muscle relaxant nor anticholinergic activity was observed. These extracts antagonized the ptosis and/or motor depression induced by tetrabenazine and also shortened the immobility time in the forced swimming test. Moreover, the H. glandulosum and H. grandifolium extracts at 1000 mg/kg p.o. potentiated the head twitches induced by 5-HTP. These observations suggest that the methanol extract of the Hypericum species in doses of 500-1000 mg/kg p.o. possess antidepressant activity in mice, without inducing significant muscle relaxation, anticholinergic and sedative properties.
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Affiliation(s)
- C C Sánchez-Mateo
- Departamento de Farmacología, Facultad de Farmacia, Universidad de La Laguna, c/Astrofísico Francisco Sánchez s/n, 38071, La Laguna, Tenerife, Spain.
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Prado B, Jara A, del Moral A, Sánchez E. Numerical taxonomy of microorganisms isolated from goat cheese made in Chile. Curr Microbiol 2001; 43:396-9. [PMID: 11685504 DOI: 10.1007/s002840010326] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2001] [Accepted: 04/12/2001] [Indexed: 11/25/2022]
Abstract
118 strains of heterotrophic microorganisms were isolated from goat cheese produced domestically in the IV Region of Northern Chile (Serene, Ovalle, and Illapel) and sold in supermarkets in Valparaíso, Chile. The results of 89 phenotypic tests were numerically analyzed against 17 reference strains, using the simple matching coefficient (S(SM)). Thirteen phena were found at a 78% similarity level. Five of them (A, B, C, D, and E) were assigned to the family Enterobacteriaceae, phenon F was identified as belonging to the genus Aeromonas and strains of phenon G were assigned to the genus Acinetobacter. The other phena were identified as being members of the genera Bacillus (H, I, and J), Staphylococcus (K), Enterococcus (L), and Micrococcus (M). Approximately 19% of the isolates were Escherichia coli and 27%, Staphylococcus aureus.
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Affiliation(s)
- B Prado
- Laboratory of Microbiology, Universidad Técnica Federico Santa María, Sede Viña del Mar, Viña del Mar, Chile
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Lizama C, Monteoliva-Sánchez M, Prado B, Ramos-Cormenzana A, Weckesser J, Campos V. Taxonomic study of extreme halophilic archaea isolated from the "Salar de Atacama", Chile. Syst Appl Microbiol 2001; 24:464-74. [PMID: 11822685 DOI: 10.1078/0723-2020-00053] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [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: 11/18/2022]
Abstract
A large number of halophilic bacteria were isolated in 1984-1992 from the Atacama Saltern (North of Chile). For this study 82 strains of extreme halophilic archaea were selected. The characterization was performed by using the phenotypic characters including morphological, physiological, biochemical, nutritional and antimicrobial susceptibility test. The results, together with those from reference strains, were subjected to numerical analysis, using the Simple Matching (S(SM)) coefficient and clustered by the unweighted pair group method of association (UPGMA). Fifteen phena were obtained at an 70% similarity level. The results obtained reveal a high diversity among the halophilic archaea isolated. Representative strains from the phena were chosen to determine their DNA base composition and the percentage of DNA-DNA similarity compared to reference strains. The 16S rRNA studies showed that some of these strains constitutes a new taxa of extreme halophilic archaea.
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Affiliation(s)
- C Lizama
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Spain
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Muñoz G, González C, Flores P, Prado B, Campos V. Comparison between the polypeptide profile of halophilic bacteria and salt tolerant plants. Microbiologia 1997; 13:489-92. [PMID: 9608523] [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] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Changes in the polypeptide profile induced by salt stress in halotolerant and halophilic bacteria, isolated from the Atacama desert (northern Chile), were compared with those in the cotyledons of Prosopis chilensis (Leguminoseae) seedlings, a salt tolerant plant. SDS-PAGE analyses show the presence of four predominant polypeptides, with molecular weights around 78, 70, 60 and 44 kDa respectively, both in bacteria and in cotyledons from P. chilensis seedlings raised under salt stress conditions. Moreover, the 60 and 44 kDa polypeptides seem to be salt responsive, since their concentration increases with increasing NaCl in the growth medium. Our results suggest a common mechanism for salt tolerance in prokaryotes and in eukaryotes.
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Affiliation(s)
- G Muñoz
- Instituto de Biología, Universidad Católica de Valparaíso, Chile
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Prado B, Bernal P, Contreras M, Saavedra M, del Moral A, Joyas A. [Numerical taxonomy of staphylococci isolated from water and beach sand from Valparaíso and viña del Mar, Chile]. Rev Latinoam Microbiol 1994; 36:71-77. [PMID: 7973182] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A total of 85 strains of Gram positive cocci isolated from beach water and sand located in Valparaiso bay, and Viña del Mar, Chile, were examined for 59 morphological, physiological and biochemical characteristics. The taxonomic data were analysed by numerical taxonomy using Ssm coefficient and the Unweighted Pair Group Method of Association (UPGMA). At 80% similarity level, four phenons were obtained. Of the 85 strains 31% were classified as Staphylococcus epidermidis, 9% were classified as Staphylococcus haemolyticus, 36% were classified as Staphylococcus spp. and 24% as Staphylococcus aureus. Epidemiological considerations are made in relation with the probable impact that the isolation of Staphylococcus aureus and coagulase negative Staphylococci would have on the health of the population.
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Affiliation(s)
- B Prado
- Laboratorio de Microbiología, Universidad Técnica Federico Santa María, Viña del Mar, Chile
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Valderrama MJ, Prado B, del Moral A, Ríos R, Ramos-Cormenzana A, Campos V. Numerical taxonomy of moderately halophilic gram-positive cocci isolated from the Salar de Atacama (Chile). Microbiologia 1991; 7:35-41. [PMID: 1867776] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A taxonomic study has been carried out on 22 strains of moderately halophilic motile cocci isolated from the Salar de Atacama (Chile). The 112 phenotypic tests were analyzed by numerical taxonomy using SSM coefficient and the unweighted pair group method of association (UPGMA). At the 67% similarity level, two phenons were obtained: phenon A included 11 strains and phenon B, 11 strains too, whereas the six reference strains did not cluster within these two phenons. These results suggest that moderately halophilic cocci with different phenotypic characteristics from previously described species can be isolated from the hypersaline habitat Salar de Atacama.
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Affiliation(s)
- M J Valderrama
- Department of Microbiology, Faculty of Pharmacy, University of Granada, Spain
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Prado B, del Moral A, Tapia P, Joyas A. [Numerical taxonomy of Staphylococci isolated from clinical samples]. Rev Med Chil 1990; 118:841-5. [PMID: 2152226] [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: 12/30/2022]
Abstract
A taxonomic study of 82 strains of Staphylococci and 6 reference samples isolated from clinical cases was carried out. Results of 47 phenotype tests were submitted to a numerical analysis using the similarity coefficient of Sokal and Michener and a grouping technique (UPGMA). Based on a 75 similarity level, 4 phenons were identified. 37 strains identified as S aureus were grouped in phenon A; 32 strains of S hominis in phenon B; 5 strains of S epidermidis in phenon C and 8 strains of S ssp in phenon D.
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Affiliation(s)
- B Prado
- Laboratorio Clínico, Hospital Dr Gustavo Fricke, Viña del Mar, Chile
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