551
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Eulitz C, Eulitz H, Maess B, Cohen R, Pantev C, Elbert T. Magnetic brain activity evoked and induced by visually presented words and nonverbal stimuli. Psychophysiology 2000; 37:447-55. [PMID: 10934903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Evoked and induced magnetic brain activity measured over the left hemisphere were tested for their specificity to language-related processing. Induced activity refers to oscillatory alterations time locked but not phase locked to the stimulus. Words, false font stimuli, and two types of nonverbal patterns were presented visually while subjects performed a nonlinguistic visual feature detection task. The comparison of evoked and induced brain activity around 200 ms after stimulus onset revealed differential sensitivity to the stimuli. The M180 component of the evoked magnetic field was larger at the processing of words and false font stimuli compared with nonverbal stimuli. The induced magnetic brain activity in the 60-Hz band at a compatible latency range was correlated with the familiarity of the visual Gestalt. Sensitivity to language-specific information processing can be concluded if a parameter differentiates the word condition from the nonlexical conditions. Such a difference was observed at sensors located over the frontal-temporal scalp regions for induced but not evoked magnetic brain activity. Thus, evoked and induced magnetic brain activity revealed a differential sensitivity to elements of cognitive processing during the given task.
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552
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Bingen E, Fitoussi F, Doit C, Cohen R, Tanna A, George R, Loukil C, Brahimi N, Le Thomas I, Deforche D. Resistance to macrolides in Streptococcus pyogenes in France in pediatric patients. Antimicrob Agents Chemother 2000; 44:1453-7. [PMID: 10817692 PMCID: PMC89896 DOI: 10.1128/aac.44.6.1453-1457.2000] [Citation(s) in RCA: 87] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A total of 1,500 recent throat isolates of Streptococcus pyogenes collected between 1996 and 1999 from children throughout France were tested for their susceptibility to erythromycin, azithromycin, josamycin, clindamycin, and streptogramin B. The erythromycin-resistant isolates were further studied for their genetic mechanism of resistance, by means of PCR. The clonality of these strains was also investigated by means of serotyping and ribotyping. In all, 6.2% of the strains were erythromycin resistant, and 3.4 and 2.8% expressed the constitutive MLS(B) and M resistance phenotypes and harbored the ermB and mefA genes, respectively; ermTR was recovered from one isolate which also harbored the ermB gene. Ten serotypes and 8 ribotypes were identified, but we identified 17 strains by combining serotyping with ribotyping. Among the eight ribotypes, the mefA gene was recovered from six clusters, one being predominant, while the ermB gene was recovered from four clusters, of which two were predominant.
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553
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Cohen R. [Influenza: antibiotics and other treatments]. Arch Pediatr 2000; 7 Suppl 3:499s-500s. [PMID: 10941469 DOI: 10.1016/s0929-693x(00)80173-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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554
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Paltiel O, Schmit T, Adler B, Rachmilevitz EA, Polliack A, Cohen A, Haim N, Shachar MB, Epelbaum R, Barchana M, Cohen R, Ben Yehuda D. The incidence of lymphoma in first-degree relatives of patients with Hodgkin disease and non-Hodgkin lymphoma: results and limitations of a registry-linked study. Cancer 2000; 88:2357-66. [PMID: 10820359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
BACKGROUND The precise incidence of familial Hodgkin disease (HD) and non-Hodgkin lymphoma (NHL) in first-degree relatives is unknown. Through record linkage using two population-based sources, the authors estimated the risk of HD and NHL in family members of lymphoma probands. METHODS The authors identified 8,037 first-degree relatives of 2,606 lymphoma cases (28.5% HD, 71.5% NHL) treated between 1970 and 1993 in 3 hospitals in Israel via the family file of the Population Registry. The authors linked this file with the Israel Cancer Registry, then calculated the standardized incidence ratio (SIR) by dividing the observed number of cases with the expected, adjusting for age, gender, calendar year, and continent of origin. RESULTS The family file yielded incomplete ascertainment of relatives (for 771 probands, no relatives were identified). Twenty cases of lymphoma--6 HD and 14 NHL--were identified among relatives of lymphoma patients. The SIR for HD was 1.15 (95% confidence interval [CI]: 0.42-2.51) and for NHL 1.71 (95% CI: 0.93-2.87), considering the entire population of first-degree relatives. SIRs among siblings of lymphoma probands were 3.12 (95% CI: 1.01-7.29) for HD, 2.16 (95% CI: 0.45-6.31) for NHL, and 2.68 (95% CI: 1.15-5.27) for all lymphomas. There were 4 HD/HD, 1 NHL/NHL, and 3 NHL/HD sibling pairs. For HD/HD and NHL/NHL sibling pairs, the interval between lymphoma occurrence in proband and sibling was 1-4 years, whereas for HD/NHL pairs this ranged from 16 to 21 years. CONCLUSIONS The risk of lymphoma among siblings of lymphoma probands was over 2.5-fold that of the general population and lower among other family members. The temporal proximity of HD/HD and NHL/NHL sibling pairs argues for environmental as well as genetic etiology. This method was hampered by incomplete data.
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555
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Cohen R, de La Rocque F, Langue J, Navel M, Levy C, Boucherat M. [Clinical research in pediatric practice applied to ambulatory infectious pathology]. Arch Pediatr 2000; 6 Suppl 2:144s-146s. [PMID: 10370459 DOI: 10.1016/s0929-693x(99)80391-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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556
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Abstract
A survey by questionnaire on urinary tract infection (UTI) in children was conducted over a 1-year period among paediatrician practitioners (April 1997-March 1998). The aim was to provide epidemiological data and to describe the current therapeutic attitude on UTI in children in paediatrician practice. The preliminary results will be presented during the meeting on UTI in children.
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557
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558
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Cohen R, Bourrillon A. [Eviction from the nursery: principles and practical applications]. Arch Pediatr 2000; 6 Suppl 3:618s-619s. [PMID: 10429799 DOI: 10.1016/s0929-693x(99)80378-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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559
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560
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561
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Cohen R, Levy C, Boucherat M, Langue J, Autret E, Gehanno P, de La Rocque F. Five vs. ten days of antibiotic therapy for acute otitis media in young children. Pediatr Infect Dis J 2000; 19:458-63. [PMID: 10819344 DOI: 10.1097/00006454-200005000-00013] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Many publications in recent years have argued in favor of shortened therapy for acute otitis media. However, doubt persists regarding children younger than 2 years, and some authors therefore restrict short course therapy to children older than 2 years. METHODS In a prospective, comparative, double blind, randomized, multicenter trial we compared cefpodoxime-proxetil, 8 mg/kg/day in two divided doses for 10 days, with an identical 5-day regimen followed by a 5-day placebo period. RESULTS Between October, 1996, and April, 1997, 450 children (mean age, 14.3 months) were enrolled, 227 in the 5-day group and 223 in the 10-day group. In the per protocol analysis clinical success was obtained on Days 12 to 14 after the beginning of treatment (main analysis) in 175 (84.1%) of the 208 children receiving the 5-day regimen and 194 (92.4%) of the 210 children receiving the 10-day regimen (P = 0.009). The superiority of the standard regimen was more marked among children cared for outside their homes (92.5% vs. 81.5%). Clinical success persisted on Days 28 to 42 among 134 (85.4%) of the 157 assessable patients in the 5-day group and 144 (83.7%) of the 172 assessable patients in the 10-day group (P = 0.68). CONCLUSIONS The 10-day regimen resulted in a higher success rate at the conclusion of therapy, but there were no differences between the two study groups 4 to 6 weeks after enrollment in the study protocol.
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562
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563
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Hesketh PJ, Crews JR, Cohen R, Blackburn LM, Friedman CJ. Antiemetic efficacy of single-dose oral granisetron (1 mg vs 2 mg) with moderately emetogenic chemotherapy. Cancer J 2000; 6:157-61. [PMID: 10882331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
PURPOSE To compare the efficacy of oral granisetron, 1 mg and 2 mg, administered as one dose in patients who receive moderately emetogenic chemotherapy. PATIENTS AND METHODS Chemotherapy-naïve patients, scheduled to receive intravenous cyclophosphamide (500 to 1200 mg/m2) or carboplatin (> or = 300 mg/m2), were stratified by dexamethasone/methylprednisolone use (+ DEX, n = 92) or nonuse (- DEX, n = 5). Patients were randomized to one dose of either 1 mg (n = 48) or 2 mg (n = 49) of granisetron administered 60 minutes before chemotherapy. Known important prognostic variables (gender, age, alcohol) were well balanced between groups. RESULTS Using the most rigorous criterion of total control (no emetic episodes, no nausea, no rescue therapy during the first 24 hours), response rates were 54.2% (26/48) and 57.1% (28/49) in patients receiving 1 mg and 2 mg of granisetron, respectively (95% confidence interval, -0.17, 0.23). Total control rates in patients who received 1 mg and 2 mg of granisetron + DEX were also comparable: 57.8% (26/45) and 55.3% (26/47), respectively. Response rates were similar for the parameters of nausea, emesis, and complete response (no emetic episodes, no more than mild nausea, no antiemetic rescue). Among all patients, one (2.1%) who received 1 mg of granisetron and three (6.1%) who received 2 mg experienced severe nausea. The proportions of 1- and 2-mg-treated patients who received rescue therapy within the first 24 hours were 31.3% (15/48) and 34.7% (17/49), respectively. Reported adverse experiences were generally mild in severity. DISCUSSION The results of this trial demonstrate good control of emesis with a single 1-mg dose of oral granisetron, with efficacy that compares favorably with that of a 2-mg dose.
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564
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Greenberg D, Cohen R. A survey of the teaching of undergraduate psychiatry in Israel. THE ISRAEL JOURNAL OF PSYCHIATRY AND RELATED SCIENCES 2000; 36:282-90; discussion 291-2. [PMID: 10687304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
BACKGROUND The 1960-70s saw significant advances in the teaching of psychiatry in medical schools. Subsequently there have been developments in the structure of health care and in the methods and goals of medical education. METHOD All four departments of undergraduate teaching of psychiatry in Israel and single departments in Greece, UK and US were asked to respond to a questionnaire about the structure and content of their teaching program. RESULTS The amount and content of preclinical and clinical teaching have not changed over the last two decades. There has not been a significant "move into the community" and the nucleus of the program, particularly in Israel, is still in-patient psychiatry. None of the departments approached are evaluating clinical skills using performance-based techniques. CONCLUSIONS The increased awareness of the need for physicians to have knowledge and skills in psychiatry has not lead to an increase in the teaching of psychiatry to medical students. Further, the content of teaching carried out in most of the centers studied does not meet the needs of physicians, particularly those in primary care, who have to identify and manage a wide range of psychopathology.
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565
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Ullis K, Ziegenfuss TN, Cohen R, Brink WD, Roberts WJ. Effects of androstenedione in young men. JAMA 2000; 283:742; author reply 742-3. [PMID: 10683046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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566
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Cohen R, Campos JM, Salaün C, Heshmati HM, Kraimps JL, Proye C, Sarfati E, Henry JF, Niccoli-Sire P, Modigliani E. Preoperative calcitonin levels are predictive of tumor size and postoperative calcitonin normalization in medullary thyroid carcinoma. Groupe d'Etudes des Tumeurs a Calcitonine (GETC). J Clin Endocrinol Metab 2000; 85:919-22. [PMID: 10690910 DOI: 10.1210/jcem.85.2.6556] [Citation(s) in RCA: 138] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Medullary thyroid carcinoma (MTC) is a calcitonin (CT)-secreting endocrine tumor. Although plasma CT level is a specific and sensitive marker of MTC, its preoperative usefulness in predicting tumor size and postoperative CT normalization has not been documented. From a nationwide database set up by the French CT Tumor Study Group, 226 MTC patients were selected according to the following criteria: preoperative CT level determination by an immunoradiometric assay (normal value, < 10 pg/mL) within the 6 months prior to surgery, total thyroidectomy and diagnosis of MTC ascertained by histological report including tumor size. Patients were 129 females and 97 males (female/male ratio, 1.3). One hundred and twelve patients (49.6%) had the sporadic variety of the disease, 74 (32.7%) had multiple endocrine neoplasia 2A, three (1.3%) had multiple endocrine neoplasia 2B, and 37 (16.4%) had familial MTC. Median age at diagnosis was 44.8 yr (range, 4.9-80.1 yr). Complete neck dissection was performed in 159 patients (70.4%). Postoperative CT normalization was ascertained by negative response of CT to pentagastrin stimulation (< 10 pg/mL) in 94 patients. Seventy-one patients were considered as not cured because of residual tumor tissue and/or elevated CT levels. Median tumor size was 11.0 mm (range, 0.2-80.0 mm), significantly larger in females (15.0 vs. 8.0 mm, P < 0.05), and in sporadic forms (15.0 vs. 7.0 mm, P < 0.05). Tumor size was significantly correlated (r2 = 0.52, P < 0.01) with preoperative CT levels, the relationship being more straight in familial (r2 = 0.71) than in sporadic (r2 = 0.36) forms. Furthermore, preoperative CT levels under 50 pg/mL appeared to be predictive of postoperative CT normalization (44 of 45 patients). However, higher CT levels did not mean absence of postoperative CT normalization (50 of 120 patients). We conclude that low preoperative CT levels are predictive of tumor size and postoperative CT normalization.
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567
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Morris CR, Cohen R, Schlag R, Wright WE. Increasing trends in the use of breast-conserving surgery in California. Am J Public Health 2000; 90:281-4. [PMID: 10667193 PMCID: PMC1446135 DOI: 10.2105/ajph.90.2.281] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES The purpose of this study was to determine temporal trends in breast-conserving surgery in California from 1988 through 1995. METHODS Logistic regression was used to analyze data on 104,466 cases of early-stage breast cancer reported to the California Cancer Registry. RESULTS A monotonically increasing trend in breast-conserving surgery was detected after adjustment for age, race/ethnicity, stage at diagnosis, and neighborhood education level. Breast-conserving surgery increased at similar rates among all racial/ethnic groups. Older age, Asian or Hispanic race/ethnicity, late-stage diagnosis, and residence in an undereducated neighborhood were factors associated with lower use of breast-conserving surgery. CONCLUSIONS Although disparities are evident, use of breast-conserving surgery increased steadily in all groups examined in this study.
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568
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Baselga J, Pfister D, Cooper MR, Cohen R, Burtness B, Bos M, D'Andrea G, Seidman A, Norton L, Gunnett K, Falcey J, Anderson V, Waksal H, Mendelsohn J. Phase I studies of anti-epidermal growth factor receptor chimeric antibody C225 alone and in combination with cisplatin. J Clin Oncol 2000; 18:904-14. [PMID: 10673534 DOI: 10.1200/jco.2000.18.4.904] [Citation(s) in RCA: 500] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE The epidermal growth factor (EGF) receptor is frequently overexpressed in epithelial tumors. C225 is a human-to-murine chimeric monoclonal antibody that binds to the receptor and inhibits growth of cancer cells expressing the receptor. We evaluated the pharmacokinetics and toxicity of C225 in patients with advanced tumors overexpressing EGF receptors. PATIENTS AND METHODS We treated 52 patients in three successive phase I clinical trials of C225 as a single dose (n = 13), weekly multiple dose (n = 17), and weekly multiple dose with cisplatin (n = 22). C225 dose levels were 5, 20, 50, and 100 mg/m(2). In the study combining C225 with cisplatin, limited to patients with either head and neck or non-small-cell lung cancer, C225 was further escalated to 200 and 400 mg/m(2). Cisplatin was given at a dose of 60 mg/m(2) once every 4 weeks, and treatment was continued for up to 12 weeks if no disease progression occurred. RESULTS C225 displayed nonlinear pharmacokinetics, with antibody doses in the range of 200 to 400 mg/m(2) being associated with complete saturation of systemic clearance. C225 clearance did not change with repeated administration or with coadministration of cisplatin. Antibodies against C225 were detected in only one patient, and C225-associated toxicity was minimal. Patients experiencing disease stabilization were seen in all studies. In the study combining C225 and cisplatin, nine (69%) of 13 patients treated with antibody doses >/= 50 mg/m(2) completed 12 weeks of therapy, and two partial responses were observed. CONCLUSION C225 has dose-dependent pharmacokinetics, and doses that achieve saturation of systemic clearance are well tolerated. C225 given in combination with cisplatin has biologic activity at pharmacologically relevant doses.
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MESH Headings
- Adult
- Antibodies, Monoclonal/adverse effects
- Antibodies, Monoclonal/pharmacokinetics
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized
- Antineoplastic Agents/adverse effects
- Antineoplastic Agents/pharmacokinetics
- Antineoplastic Agents/therapeutic use
- Area Under Curve
- Carcinoma, Non-Small-Cell Lung/drug therapy
- Carcinoma, Non-Small-Cell Lung/therapy
- Carcinoma, Squamous Cell/drug therapy
- Carcinoma, Squamous Cell/therapy
- Cetuximab
- Cisplatin/therapeutic use
- Dose-Response Relationship, Drug
- Drug Administration Schedule
- ErbB Receptors/antagonists & inhibitors
- ErbB Receptors/genetics
- Female
- Gene Expression Regulation, Neoplastic
- Head and Neck Neoplasms/drug therapy
- Head and Neck Neoplasms/therapy
- Humans
- Infusions, Intravenous
- Lung Neoplasms/drug therapy
- Lung Neoplasms/therapy
- Male
- Neoplasms, Glandular and Epithelial/drug therapy
- Neoplasms, Glandular and Epithelial/therapy
- Recombinant Fusion Proteins/adverse effects
- Recombinant Fusion Proteins/pharmacokinetics
- Recombinant Fusion Proteins/therapeutic use
- Remission Induction
- Safety
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569
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Cohen R, Reches A, Steinberg A, Kedar H. Evaluation of a workshop to teach clinical bioethics in the clinical setting. MEDICINE AND LAW 2000; 19:451-461. [PMID: 11143882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
That the teaching of medical ethics must extend into the clinical years in order for medical students to effectively acquire the knowledge and skills required for dealing with clinical bioethical issues has been widely recognized. A limiting factor has been the lack of physicians able to teach bioethics in the clinical setting. This paper describes the structure and evaluation of a workshop for teaching clinicians how to teach bioethics in the clinical setting. 80 physicians participated in 4 workshops in which they were provided with the ethical principles needed to deal with clinical bioethical issues and appropriate teaching methods. Methods such as paper cases, videotaped standardized patient interactions and live standardized patients were presented. The workshops have been highly evaluated. Post workshop evaluation showed that a significant number of physicians taught ethical issues during rounds and seminars. The frequency of teaching ranged from once per month to one or more times per week.
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570
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Cohen R. BACKGROUND MEMORANDUM FOR THE REGIONAL CONFERENCE ON INTERNAL DISPLACEMENT IN ASLA Bangkok, February 22-24, 2000. REFUGEE SURVEY QUARTERLY 2000. [DOI: 10.1093/rsq/19.2.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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571
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Löw A, Rockstroh B, Cohen R, Hauk O, Berg P, Maier W. Determining working memory from ERP topography. Brain Topogr 1999; 12:39-47. [PMID: 10582564 DOI: 10.1023/a:1022229623355] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Event-related potentials were recorded during a delayed matching-to-sample design from 17 volunteers (5 f) using high-resolution (65 channels) EEG-recordings. In the two-stimulus paradigm, the 500-ms stimulus S1 comprised a visual pattern of two diamonds differing in size, angular rotation and location; in the delay period, Working Memory (WM) load was varied in the following way: a stimulus-free interval of 1 s was followed by a 6-s presentation either of a pattern identical to the S1 (low WM load) or of a pattern differing from S1 (high WM load). The 500-ms stimulus S2 comprised one diamond; the subject's task was to indicate by left- or right-hand (respectively) button press, whether the S2 matched the (a) left- or (b) right-positioned S1-diamond, or (c) did not match at all (NoGo). The topographical distribution of activity in the time intervals (a) following S1-offset, (b) during the WM manipulation interval and (c) prior to S2 were evaluated in the signal (scalp potential) and source (Minimum Norm) space. Following S1-offset the ERP pattern was characterised by negativity over posterior areas, slightly more so over the right hemisphere. In the subsequent 6-s interval high WM load elicited a larger negative slow ERP than low WM load, the negativity increase due to high WM load being larger over frontal than central areas. Source modelling indicated activity in anterior areas under high, and posterior activity under low WM load. Asymmetry of activity, although indicating a shift to left-hemispheric activity under high compared to low WM load, varied considerably between subjects. Results suggest that high-resolution ERP recordings allow to examine cortical activity during WM challenge.
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572
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Edelstein M, Cohen R, Burger Y, Shriber S, Pivonia S, Shtienberg D. Integrated Management of Sudden Wilt in Melons, Caused by Monosporascus cannonballus, Using Grafting and Reduced Rates of Methyl Bromide. PLANT DISEASE 1999; 83:1142-1145. [PMID: 30841139 DOI: 10.1094/pdis.1999.83.12.1142] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Sudden wilt of melons induced by Monosporascus cannonballus is a worldwide problem, mainly in arid and semi-arid regions. Soil disinfestation by fumigation with methyl bromide is a common and very effective treatment for disease control. However, methyl bromide is expected to be banned from use within the next 5 to 10 years; therefore, alternative measures for disease management are urgently needed. In this study, the efficacy of methyl bromide at a reduced rate (15 g/m2 instead of 50 g/m2) and grafted plants, alone or in combination, was examined. Experiments were conducted in the 'Arava region in southern Israel in naturally infested fields. First, various rootstock accessions were tested in three experiments. Of the eight rootstocks evaluated, cv. Brava (Cucurbita maxima) was selected to serve as a rootstock in the subsequent experiments due to its effects on wilt reduction (63 to 100% reduction in two experiments and 35% reduction in one experiment) and its horticultural performance. Next, integration of grafting and a reduced rate of methyl bromide was tested in two experiments. The reduced methyl bromide rate suppressed disease, but results were variable (32 and 91% reduction in the two experiments). Grafting, when used alone, significantly reduced wilt incidence by 84 to 87% compared to untreated plots. Integration of the two control measures provided adequate and reliable results and wilt incidence was always significantly lower (75 to 100% reduction) than incidence in untreated plots. Because control by each measure alone varies, integrated application is preferable.
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573
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Sachdeva AK, Cohen R, Dayton MT, Hebert JC, Jamieson C, Neumayer LA, Sharp KW, Spence RK. A new model for recognizing and rewarding the educational accomplishments of surgery faculty. ACADEMIC MEDICINE : JOURNAL OF THE ASSOCIATION OF AMERICAN MEDICAL COLLEGES 1999; 74:1278-1287. [PMID: 10619002 DOI: 10.1097/00001888-199912000-00007] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Faculty members' educational endeavors have generally not received adequate recognition. The Association for Surgical Education in 1993 established a task force to determine the magnitude of this problem and to create a model to address the challenges and opportunities identified. To obtain baseline information, the task force reviewed information from national sources and the literature on recognizing and rewarding faculty members for educational accomplishments. The group also developed and mailed to surgery departments at all U.S. and Canadian medical schools a questionnaire asking about the educational endeavors of the surgery faculty and their recognition for such activities. The response rate after two mailings was only 56%, but the responses reaffirmed the inadequacy of systems for rewarding and recognizing surgeon-teachers and surgeon-educators, and confirmed that the distinction between the roles of teacher and educator was rarely made. The task force created a four-tier hierarchical model based on the designations teacher, master teacher, educator, and master educator as a framework to offer appropriate recognition and rewards to the faculty, and endorsed a broad definition of educational scholarship. Criteria for various levels of achievement, ways to demonstrate and document educational contributions, appropriate support and recognition, and suggested faculty ranks were defined for these levels. The task force recommended that each surgery department have within its faculty ranks a cadre of trained teachers, a few master teachers, and at least one educator. Departments with a major commitment to education should consider supporting a master educator to serve as a resource not only for the department but also for the department's medical school and other medical schools. Although this model was created for surgery departments, it is generalizable to other disciplines.
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574
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Cohen R, Pivonia S, Shtienberg D, Edelstein M, Raz D, Gerstl Z, Katan J. Efficacy of Fluazinam in Suppression of Monosporascus cannonballus, the Causal Agent of Sudden Wilt of Melons. PLANT DISEASE 1999; 83:1137-1141. [PMID: 30841138 DOI: 10.1094/pdis.1999.83.12.1137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Sudden wilt (vine decline) of melon, caused by Monosporascus cannonballus, is a worldwide problem in arid and semi-arid regions. Soil disinfestation by fumigation with methyl bromide before planting is a common treatment for disease management but, because methyl bromide is expected to be banned from use within the next 10 years, alternative measures for disease suppression are needed. The efficacy of 29 fungicides against M. cannonballus was evaluated in vitro. Among the fungicides tested, fluazinam and kresoxim methyl were the most effective and both totally inhibited the growth of M. cannonballus in culture at concentrations of 10 μg a.i /ml. Because fluazinam also was effective in inhibition of Pythium aphnidermatum, which also may be involved in sudden wilt syndrome, and kresoxim methyl was not, fluazinam was chosen for further tests. The effective dose of fluazinam for M. cannonballus that reduced mycelial growth by 50% was 0.09 μg a.i./ml. Fluazinam efficacy was evaluated in three field experiments conducted in the spring and in the late summer cropping seasons. In two of the experiments, applications of fluazinam resulted in approximately 87% wilt reduction, whereas in the third experiment it was only 32%. The mobility of fluazinam in soil was determined in samples taken from the field. Fungicide mobility in soil was relatively limited; most of the compound was adsorbed to soil particles, resulting in a zone of high concentration that decreased with depth and distance from the application site. Nevertheless, rates measured even at a depth of 25 cm were sufficient to control M. cannonballus. This study shows that fluazinam may be used as one component in an integrated approach for suppression of sudden wilt of melons.
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