Comparing single versus multiple virus detection in pediatric acute gastroenteritis postimplementation of routine multiplex RT-PCR diagnostic testing

Utilizing multiplex real time polymerase chain reaction (RT-PCR) for rapid diagnosis of gastroenteritis, enables simultaneous detection of multiple pathogens. A comparative analysis of disease characteristics was conducted between cases with single and multiple viruses. Rotavirus vaccine was introduced in 2010, reaching a 70% coverage in 2 years. All rectal swabs collected from diarrheic children (<5 years) between December 2017 and March 2022 were included. Detection of the same viruses within 2 months was considered a single episode. Episodes with positive stool bacterial PCR were excluded. A total of 5879 samples were collected, revealing 86.9% (1509) with single virus detection and 13.1% (227) with multiple viruses. The most frequent combination was rotavirus and norovirus (27.8%), these infections followed a winter-spring seasonality akin to rotavirus. Children with multivirus infections exhibited higher immunodeficiency (OR 2.06) rates, but lower food allergy (OR 0.45) and prematurity rates (OR 0.55) compared to single infections. Greater disease severity, evaluated by the Vesikari score, was observed in multivirus episodes (p < 0.001, OR 1.12). Multivirus infections accounted for 13.1% of symptomatic cases in hospitalized young children. Despite vaccination efforts, rotavirus remained prominent, frequently in co-infections with norovirus. Overall, multivirus infections were linked to more severe diseases than single virus cases.

Possible origin of the smaller-than-universal percolation-conductivity exponent in the continuum

For quite a few systems in the continuum, such as carbon nanotube polymer composites and segregated composites, percolation electrical conductivity exponents that are much smaller than the universal value have been reported. This is unexpected in view of the classical lattice percolation theory. Here we provide a simple general phenomenological model that accounts for such observations within the framework of universality. We suggest that these small value exponents are due to the interplay between the connectivity and the structural variations that follow the increase of the fractional volume content of the conducting phase.

Tunneling and Percolation Behavior in Granular Metals

The nature of the percolation process in granular metals is examined for the first time by a computer simulation of a system of metallic grains embedded in an insulating matrix. Assuming that the intergrain conduction is due to quantum mechanical tunneling it is found that a percolation-like critical behavior of the conductivity is obtained, but that a percolation universal behavior will be found only in a very special case. In contrast, the behavior of the electrical noise does not deviate substantially from the universal one. Comparison of these results with recent experimental observations suggests that in the metallic range, both transport properties are controlled by the continuous metallic network rather than by intergrain tunnelin.. We propose that the metallic network resembles the previously studied system of ‘inverted random voids’.

[Effect of polypectomy on voice quality]

Voice quality and improvement after vocal cord polypectomy was assessed in 15 patients. The polyps were found by indirect observation; assessment of vocal quality was by recording isolated vowels, words and sentences said in Hebrew before operation and 1 and 3 months later. The recordings were analyzed using a computer program written at the Medical Electronics Laboratory of The Technion. Analysis of the 5 Hebrew vowels (a,e,i,o,u) yielded numerical and graphical data of formats specific for each utterance and speaker. These data were compared with control data taken from the literature for healthy Hebrew speakers. Statistical analysis (by paired t-test for matched samples) revealed a tendency to a decrease in difference between postoperative results and control data. Comparison of preoperative recordings with control data suggest that this method of voice condition assessment is worth considering for systematic application in clinics and hospitals. Among its advantages is that it permits long-term objective assessment of changes in voice quality. It thus supplies data for follow-up studies of patients and others who suffer from voice problems, especially those whose voice is their professional tool.

Bilateral perilymph fistula in an adult

Sudden hearing loss is a symptom caused by a variety of diseases, among them also a perilymph fistula. The occurrence of bilateral perilymph fistula is rare, and was reported only associated with head trauma. A case of a bilateral perilymph fistula, without head trauma in an adult construction worker is reported. To the best of our knowledge this is the first bilateral case caused by physical effort to be reported in the literature.

Model studies of the effects of the thoracic pressure on the circulation

Two models of the cardiovascular system subjected to changes in intrathoracic pressure (ITP) are used to simulate the response to normal and positive pressure ventilation and the Mueller maneuver. The first model, based on our earlier model for cardiopulmonary resuscitation and cardiac assist by ITP variations, is based on lumped parameter representation of the cardiovascular system with two ventricles which function based on the time-varying elastance concept using their transmural pressures as the load. The ITP is assumed to be equally distributed in the thoracic cavity and equally affecting all cardiovascular structures within the chest. The model shows that a decrease in ITP is associated with an initial decrease in aortic pressure and flow and an increase in left ventricular end-diastolic and end-systolic volumes. A transient decrease in left ventricular volume which was suggested to occur by a few studies cannot be predicted based on this model. Such a decrease in left ventricular volume can be only predicted when a pericardial constraint is included, as done in the second model. Positive pressure interventions are associated with decreased heart volumes and cardiac output which is primarily a "preload" effect. In general the model reasonably predicts the hemodynamics as a function of the ITP changes and may be used as a tool to investigate the response of the cardiovascular system to various ITP interventions.

Sexual problems among family medicine patients

A self-administered questionnaire assessing sexual satisfaction and presence of a number of common sexual problems was developed. Following assessment of reliability and validity, the questionnaire was administered to 142 patients seen in a family medicine center. While 56 percent of patients reported one or more sexual problems, such problems were noted in the medical record in 22 percent of the cases. The nature of many of the problems (ie, techniques of foreplay, fear of pregnancy, and differences in attitudes and expectations between partners) suggests an effective role in treatment for the primary care physician.

Functional disability of elderly family medicine patients in acute care hospital and nursing homes

This report describes the functional impairments of elderly patients from a family medicine program who were admitted either to an acute care hospital or long-term care facilities over the course of a year. Assessments were performed in the areas of social and economic resources, mental health, physical health, and the ability to perform routine activities needed for independent living. The presence of significant functional impairment in many of the areas suggests the need for the family physician to develop skills in working as a member of a health care team in order to design and implement a comprehensive treatment plan for elderly patients admitted either to hospitals or long-term care facilities.