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עמוד בית
Sun, 24.11.24

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July 2002
Rami Sagi, MD, Eyal Robenshtok, MD, Lior H. Katz, MD, Shmuel Reznikovich, MMHF, Israel Hendler, MD, Lior Poles, MD, Ariel Hourvitz, MD, Boaz Tadmor, MD, Meir Oren, MD, Giora Martonovich, MD and Boaz Lev, MD

The threat of a disease outbreak resulting from biologic warfare has been of concern for the Israeli health system for many years. In order to be prepared for such an event the health system has formulated doctrines for various biologic agents and defined the logistic elements for the procurement of drugs. During the last 4 years, and especially after the West Nile fever epidemic in 2000, efforts to prepare the healthcare system and the relevant organizations were accelerated. The Director-General of the Ministry of Health nominated a Supreme Steering Committee to fill in the gaps and upgrade the preparedness of the health system for an unusual disease outbreak. This committee and its seven subcommittees established appropriate guidelines, communication routes among different organizations, and training programs for medical personnel. The anthrax outbreak in the United States found the healthcare system in the hub of the preparation process, and all modes of action were intensified. Further work by hospitals, primary care clinics and all other institutes should be initiated to maintain a state of proper preparedness.

Manfred S. Green, MD, PhD and Zalman Kaufman, MSc

The appearance of “new” infectious diseases, the reemergence of “old” infectious diseases, and the deliberate introduction of infectious diseases through bioterrorism has highlighted the need for improved and innovative infectious disease surveillance systems. A review of publications reveals that traditional current surveillance systems are generally based on the recognition of a clear increase in diagnosed cases before an outbreak can be identified. For early detection of bioterrorist-initiated outbreaks, the sensitivity and timeliness of the systems need to be improved. Systems based on syndromic surveillance are being developed using technologies such as electronic reporting and the internet. The reporting sources include community physicians, public health laboratories, emergency rooms, intensive care units, district health offices, and hospital admission and discharge systems. The acid test of any system will be the ability to provide analyses and interpretations of the data that will serve the goals of the system. Such analytical methods are still in the early stages of development.

Paul E. Slater, MD, MPH, Emilia Anis, MD, MPH and Alex Leventhal, MD, MPH, MPA

Because of its high case-fatality rate, its very high transmission potential, and the worldwide shortage of effective vaccine, smallpox tops international lists of over a dozen possible bioterror and biologic warfare agents. In a scenario involving aerosol variola virus release, tens to hundreds of first-generation cases would ensue, as would hundreds to thousands of subsequent cases resulting from person-to-person transmission. A smallpox outbreak in Israel must not be regarded as a doomsday event: the methods of smallpox outbreak control are known and will be implemented. The rapidity with which organized outbreak control measures are competently executed will determine how many generations of cases occur before the outbreak is brought under control. Planning, vaccine stockpiling, laboratory expansion, professional training and public education, all carried out well in advance of an epidemic, will minimize the number of casualties. The reinstitution of routine smallpox vaccination in Israel, as in other countries, must be given serious consideration, since it has the potential for eliminating the threat of smallpox as a bioterror agent.

Shmuel Kron, MD, MPA and Shlomo Mendlovic, PhD, MD
Ronen Rubinshtein, MD, Eyal Robenshtok, MD, Arik Eisenkraft, MD, Aviv Vidan, MD and Ariel Hourvitz, MD

Recent events have significantly increased concern about the use of biologic and chemical weapons by terrorists and other countries. Since weapons of mass destruction could result in a huge number of casualties, optimizing our diagnostic and therapeutic skills may help to minimize the morbidity and mortality. The national demands for training in medical aspects of nuclear, biologic and chemical warfare have increased dramatically. While Israeli medical preparedness for non-conventional warfare has improved substantially in recent years especially due to extensive training programs, a standardized course and course materials were not available until recently. We have developed a core curriculum and teaching materials for a 1 or 2 day modular course, including printed materials.

Jehuda Hiss, MD, Maya Freund, PhD, Uzi Motro, PhD and Tzipi Kahana

Background: The majority (n = 445) of the Israeli and Palestinian fatal victims of the El Aqsa Intifada was examined at the National Center of Forensic Medicine in Tel Aviv. Analysis of the trauma sustained and the anthropologic profile of both the victims and the perpetrators elucidates the trends and contrasts them with the phenomenon in the past.

Objectives: The purpose of the forensic investigation of mass casualty incidents is manifold: establishing the minimal number of individuals involved, identifying the victims and perpetrators, collecting material evidence, and determining the modus operandi.

Methods: The postmortem examination includes external description of the bodies and their injuries, photo-documentation, and sampling of tissues. Radiography, dental examination, and a ten-print card of each cadaver are also recorded.

Results: The modus operandi of the current Intifada is somewhat different from that of the previous wave of terrorism and includes more road shootings and vehicular terrorism. In addition, three suicide bombers using explosive devices detonated within crowded areas were young women, and the age of the perpetrators has increased from up to 35 years to individuals as old as 47, thus greatly enlarging the potential number of suicide terrorists. Virologic and biologic tests have been introduced to examine the tissues of the suicide bombers since they are possible sources of contagion to the wounded victims.

Conclusion: The results of the medico-legal investigation of victims and perpetrators of terrorism enable us to establish the modus operandi and the profile of potential perpetrators, which can help in the prevention of similar attacks. Documentation of the different types of injuries in fatal victims of explosion and shooting contributes to improving the awareness of the medical staff treating the wounded of similar attacks. Further investigation into the reliability of virologic and biologic tests conducted on postmortem tissue is recommended.

Adi Yagur, MD, Alexander Grinshpoon, MD and Alexander Ponizovsky, MD, PhD

Background: The threat to the individual’s physical integrity and well-being as well as to those of significant others, the disruption of normal patterns of life, and property losses make wartime a highly stressful condition.

Objectives: To assess the level of psychological distress in primary care attenders in a district of Jerusalem (Gilo) that experienced long-term exposure to gunfire.

Methods: A self-administered questionnaire exploring emotional distress (anxiety and depression symptoms), fire exposure, patterns of help-seeking behavior, and prescription of sedative or hypnotic drugs was administered to a sample of 125 consecutive attenders to a general practitioner during a 10 week period in the autumn of 2001. Eighty-four attenders residing in Gilo were compared with 41 attenders residing in neighborhoods that had not been under fire. T-tests and Mann-Whitney two-sample tests were used to determine statistical significance of differences.

Results: The mean distress score was significantly higher among the Gilo residents than among their counterparts in other neighborhoods (1.1 ± 0.8 vs. 0.8 ± 0.5, t = 1.73, P <0.01); 15.5% of the former reported probable clinically significant distress. Emotional distress was associated with periods of intensive gunfire exposure, psychological care-seeking behavior, and the prescription of sedative or hypnotic drugs. No significant differences in distress levels were found between those living in zones of Gilo that were at differential gunfire risk, nor between those whose houses and cars were or were not damaged.

Conclusions: War-related life events would seem to be associated with elevated emotional distress. A motivated primary care physician could easily and reliably ascertain the attenders’ psychological status and identify those requiring psychological support. These identification and intervention stages are facilitated if the specialized services are community-based.

Alina Weissman-Brenner, MD, Avi David, Avi Vidan, MD and Ariel Hourvitz, MD

Background: Organophosphates (OP) are frequently used as insecticides in the household and in agricultural areas, thus posing a risk for accidental exposure.

Objectives: To describe the characteristics, clinical course and outcome of 97 patients admitted to emergency rooms with a diagnosis of acute OP poisoning.

Methods: The clinical details of 97 patients were collected from 6 different hospitals in Israel. Diagnosis of intoxication was based on clinical findings, butyrylcholinesterase levels and, in several cases, the material brought to the hospital. Demographic, intoxication and clinical data were analyzed.

Results: The study group comprised 64 men and 33 women whose age range was 1–70 years old (mean 19.8 ± 17.1); more than one-third of the patients were less than 10 years old. Accidental exposure was the cause of intoxication in 51.5% of the patients, and suicide in 20.6% of exposures. Intoxication occurred at home in most patients (67%), and the route of intoxication was oral in 65% of them. The patients arrived at the hospital 20 minutes to 72 hours after intoxication. Nine patients were asymptomatic; 53 presented with mild intoxication, 22 with moderate, and 13 had severe intoxication, 5 of whom died. There was a direct correlation between the degree of inhibition of butyrylcholinesterase levels and the severity of intoxication. Treatment included decontamination and antidotal medication. Duration of hospitalization ranged between 1 and to 14 days (average 2.9 days).

Conclusions: Organophosphates may cause severe morbidity and mortality. Medical staff should therefore be aware of the clinical manifestations and the antidotal treatment for this poisoning.
 

June 2002
Alexander Guber, MD, Eyal Morris, MD, Baruch Chen MD and Shaul Israeli, MD

Background: Ventilator-dependent patients represent an increasing clinical, logistic and economic burden.  An alternative solution might be monitored home care with high-tech ventilatory support systems. 

Objectives: To explore the implications of such home-care management, such as its impact on quality of life and its cost-effectiveness, and to assess the practical feasibility of this mode of home care in Israel.

Methods: We surveyed 25 partly or fully home-ventilated patients (17 males and 8 females), average age 37.6 years (range 1–72), who were treated through a home-care provider during a 2 year period.

Results: Most patients (n=18) had a neuromuscular respiratory disorder.  The average hospital stay of these patients prior to entry into the home-care program was 181.2 days/per patient.  The average home-care duration was 404.9 days/per patient (range 60–971) with a low hospitalization rate of 3.3 ± 6.5 days/per patient.  The monthly expenditure for home care of these patients was one-third that of the hospital stay cost ($3,546.9 vs. $11,000, per patient respectively).  The patients reported better quality of life in the home-care environment, as assessed by the Sickness Impact Profile questionnaire. 

Conclusions: Home ventilation of patients in Israel by home-care providers is a practical and attractive treatment modality in terms of economic benefits and quality of life.
 

Shlomo Vinker, MD, Sasson Nakar, MD, Elliot Rosenberg, MD, MPH and Eliezer Kitai, MD

Background: Colorectal cancer is the second leading cause of cancer mortality in Israel. Unfortunately, compliance  with annual fecal occult blood testing is very low.

Objective: To assess the effectiveness of interventions to increase FOBT[1] screening in primary care clinics in Israel.

Methods: A prospective, randomized study included all 50–75 year old enrollees of six family physicians in two primary care clinics. The register of two physicians, one from each clinic, was allocated to one of three groups. Two FOBT reminder strategies were tested: a physician reminder (753 patients), and a patient reminder that was either a phone call (312 patients) or a letter (337 patients). The control group (913 patients) of physicians continued administering their regular level of care. The main outcome measure was the percentage of patients undergoing FOBT screening in each study arm at the conclusion of the one year study period.

Results: In the intervention groups 14.3% (201/1,402) were screened using the FOBT over the course of the study year. Using an intent-to-screen analysis, the screening rate in the physician and patient reminder groups was significantly higher than in the control group(16.5 and 11.9%,vs. 1.2% respectively, P < 0.0001). Phone reminders were significantly more efective as compared to letters (14.7 vs. 9.2%, P = 0.01).

Conclusions: Our study has shown the benefit of various FOBT reminder systems, especially those centered around the family physician. Further research should focus on this area, in conjunction with other novel approaches.

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[1] FOBT = fecal occult blood testing

Eliezer Golan, MD, Bruria Tal, PhD, Yossef Dror, PhD, Ze’ev Korzets, MBBS, Yaffa Vered, PhD, Eliyahu Weiss, MSc and Jacques Bernheim, MD

Background: Multiple factors are involved in the pathogenesis of hypertension in the obese individual.

Objective: To evaluate the role of a decrease in sympathetically mediated thermogenesis and the effect of the correlation between the plasma leptin and daily urinary nitric oxide levels on obesity-related hypertension.

Methods: We evaluated three groups: 25 obese hypertensive patients (age 45.7±1.37 years, body mass index 34.2±1.35 kg/m2, systolic/diastolic blood pressure 155±2.9/105±1.3, mean arterial pressure 122±1.50 mmHg); 21 obese normotensive patients (age 39.6±1.72, BMI[1] 31.3±0.76, SBP/DBP[2] 124±2.1/85.4±1.8, MAP[3] 98.2±1.80); and 17 lean normotensive subjects (age 38.1±2.16, BMI 22.1±0.28, SBP/DBP 117±1.7/76.8±1.5, MAP 90.1±1.50). We determined basal resting metabolic rates, plasma insulin (radioimmunoassay), norepinephrine (high performance liquid chromatography) in all subjects. Thereafter, 14 obese hypertensives underwent a weight reduction diet. At weeks 6 (n=14) and 14 (n=10) of the diet the above determinations were repeated. Plasma leptin (enzyme-linked immunosorbent assay) and UNOx[4] (spectrophotometry) were assayed in 17 obese hypertensives and 17 obese normotensives, and in 19 obese hypertensives versus 11 obese normotensives, respectively.

Results: Obese hypertensive patients had significantly higher basal RMR[5] and plasma NE[6] levels. Insulin levels were lower in the lean group, with no difference between the hypertensive and normotensive obese groups. At weeks 6 and 14, BMI was significantly lower, as were insulin and NE levels. RMR decreased to values of normotensive subjects. MAP normalized but remained significantly higher than that of obese normotensives. Leptin blood levels and the leptin/UNOx ratio were significantly higher in the obese hypertensive compared to the obese normotensive patients. Both these parameters were strongly correlated to BMI, MAP5, RMR, and plasma NE and insulin .Obese hypertensive patients excreted less urinary NO metabolites. A strong correlation was found between MAP and the leptin/UNOx ratio.  

Conclusions: A reduction of sympathetically mediated thermogenesis, as reflected by RMR, results in normalization of obesity-related hypertension. In contrast, insulin does not seem to play a major role in the pathogenesis of hypertension associated with obesity. Increased leptin levels in conjunction with decreased NO production in the presence of enhanced sympathetic activity may contribute to blood pressure elevation in the obese.

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[1] BMI = body mass index

[2] SBP/DBP = systolic blood pressure/diastolic blood pressure

[3] MAP = mean arterial pressure

[4] UNOx = urinary nitric oxide

[5] RMR – resting metabolic rate

[6] NE = norepinephrine

Naomi B. Zak, PhD, Sagiv Shifman, MSc, Anne Shalom, PhD and Ariel Darvasi, PhD, MPH

The complex genetic nature of many common diseases makes the identification of the genes that predispose to these ailments a difficult task. In this review we discuss the elements that contribute to the complexity of polygenic diseases and describe an experimental strategy for disease-related gene discovery that attempts to overcome these factors. This strategy involves a population-based case-control paradigm and makes use of a highly informative, homogeneous founder population, many of whose members presently reside in Israel. The properties of single nucleotide polymorphisms, which are presently the markers of choice, are discussed, and the technologies that are currently available for SNP[1] genotyping are briefly presented.

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[1] SNP = single nucleotide polymorphism

Ron Reshef, MD, Wisam Sbeit, MD and Jesse Lachter, MD
Jacob Bickels, MD, Yehuda Kollender, MD and Isaac Meller, MD
May 2002
Yafim Brodov, PhD, MD, Lori Mandelzweig, MPH, Valentina Boyko, MSc and Solomon Behar, MD

Background: Clinical studies showing an association between immigration and increased prevalence of coronary risk factors or mortality rate in patients immigration is associated with greater risk among immigrants from the Soviet with coronary artery disease are scarce.

Objectives: To compare the risk profile and mortality of coronary patients born in Israel with those who immigrated to Israel, and to determine whether recent Union.

Methods: Demographic, clinical, and laboratory data were collected on chronic coronary artery disease patients from 18 Israeli medical centers during the screening period of the Bezafibrate Infarction Prevention Study in the early 1990s. Data on mortality after a mean 7.7 year follow-up were obtained from the Israel Population Registry.

Results: While significant differences in mortality (14.7% vs. 18.5%, P < 0.001) were observed between Israeli-born patients and immigrants respectively, the mortality in these groups was similar when compared within specific age groups. Immigrants suffered more from hypertension and angina pectoris, and their New York Heart Association functional limitation class was higher, as compared to their Israeli-born counterparts. A multivariate analysis of mortality comparing patients from the Soviet Union who immigrated after 1970 with those who immigrated before 1970 showed an increased risk for newer immigrants, with a hazard ratio of 1.69 (95% confidence interval 1.19-2.40) for those immigrating between 1970 and 1984, and 1.68 (95% CI[1] 1.01-2.28) for those immigrating between 1985 and 1991.

Conclusion: The worse profile and prognosis observed among patients who recently emigrated from the Soviet Union cannot be explained by traditional risk factors for CAD[2] such as smoking, diabetes, hypertension, and lipid disorders. Further investigation, including variables such as psychological stress to which immigrants are more exposed than others, is needed.

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[1] CI = confidence interval


[2] CAD = coronary heart disease


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