130,700 research outputs found
Cow's milk allergy: how to deal with it?
No full textCow's milk allergy (CMA) is one of the most frequent allergic pathologies in early childhood, affecting up to 7.5 % of infants. Epidemiologically, it has been noted that those children who present with IgE-mediated CMA not only have a higher incidence of inhalant sensitisation, but they also show a general higher incidence of other food allergies, including egg proteins.
Physicians are increasingly asked to evaluate patients for possible food allergy. In any case in which a child presents with a suspicion of CMA and with gastrointestinal, respiratory and/or cutaneous symptoms, diagnosis should be considered. Clinicians need to reach an accurate diagnosis, which is essential, in order to reassure parents and also to set an adequate treatment which can actually decrease the risk of allergic reactions
Friday asthma crisis in the daughter of two bakers.
No full textThe prevalence of sesame food allergy continues to increase worldwide. The diagnostic tools to confirm such allergy include skin prick tests, specific IgEs and food challenge. We report the case of a 7-year-old girl who presented recurrent episodes of wheezing and dyspnoea. After performing skin tests and evaluating specific IgEs we hypothesised an allergy to sesame. Our patient actually benefitted from avoiding any contact with sesame and sesame seeds. We confirmed our diagnosis through an inhalation food challenge. Further, by reviewing her personal history, we suspect inhalation was the mechanism in which the girl became sensitised to sesame
Test of Clausius' Virial Dynamical Theory of Fundamental Plane By Homogeneous + γ-Free Two Component Galaxy Model
No full textIntroduction: the theory of the Fundamental Plane (FP) proposed by Secco (2000, 2001,2005) is based on the existence of a maximum in the Clausius' Virial potential energy (CV) of a stellar component when it is
completely embedded inside a dark matter (DM) halo. At the first order approximation the theory was developed by modeling the two-components with two power-law density profiles and two homogeneous cores. In order to test the extension of the theory to an higher order we explore the effect on an homogeneous stellar component due to a DM halo with a density profile characterized by a inner slope γfree and an outer slope -3, according to high resolution rotation curves of Sps (Garrido et al. 2004). The aim is to investigate the role of the dark to bright mass ratio m and of the halo concentration C[D] in order to produce the maximum of CV. Particular attention is devoted to the slope of the density halo profile at the maximum location, to its height in comparison with the CV value when the two component coincide, V[n.] For all the models we choose γ=0. Method: we follow the general method
proposed by Caimmi (1993) for two striated ellipsoidals with Zhao-density profiles. Virial equilibrium is described by tensor virial equations extended to two subcomponents (Caimmi & Secco,1992). The interaction terms are numerically performed for different values of m and C [D] and sequences of CV as function of the ratio baryonic to halo virial semi-axis are taken into account. Results: the special configuration at the CV maximum with all the properties discovered with the theory of first order appears if m is greater than a given threshold.The corresponding slope (in absolute value) on the halo DM profile decreases either as m increases at fixed C[D] or as C[D] decreases at fixed m. The same conspiracy between m and C[D] appears in order to obtain the highest values of V[n]. Discussion: the test is relevant in order to confirm the main results of the first order approach and then to move the description of the main features of galaxy FP toward more realistic models
An alternative method of finding bifurcation points in pseudo-barotropes
No full textStarting from the equations of hydrodynamics, which include both collisional and collisionless ideal fluids, the special case of pseudo-barotropes with anisotropic pressure distribution along tangential or vertical direction (in respect to a ``vertical'' rotation axis) is considered. We find that vertical motions are equivalent to an imaginary rotation, and call ``pseudo-rotation'' the combination of rotation and real or imaginary peculiar circular motions. By use of a necessary condition for equilibrium, i.e. the coincidence of the boundary with an isopotential (gravitational + rotational centrifugal + real peculiar or imaginary peculiar centrifugal) surface, a new method of finding bifurcation points from axisymmetric to triaxial pseudo-barotropic sequences -- discussed in an earlier paper -- is dealt with for the systems under discussion. A simple application to the special case where the isopycnic surfaces are spheroidal discloses that, on one hand, steadily pseudo-rotating, heterogeneous spheroids, cannot be equilibrium configurations and, on the other hand, the same results obtained by use of the virial technique hold when the current method can work. Then the coincidence of the boundary with an isopotential surface and the validity of the virial equations of the second order make two independent (necessary) conditions for equilibrium and both must be satisfied. Under the further assumptions of steady rotation and homeoidally or focaloidally striated distribution of matter, the configurations for which a bifurcation point must necessarily occurr, are determined. In the former alternative a connection is also established, between local (on the boundary) and global anisotropy of pressure distribution; in particular, it is found that local isotropy (on the boundary) involves global isotropy and vice versa. In both cases, the right amount of of anisotropy turns out to yield violation of a threshold for stability, {cal E}_rot = - - E_rot / E_pot <= 0.14, conjectured by Ostriker and Peebles (1973). This result gives additional support to a conclusion established in an earlier paper: it seems more germane to speak about Ostriker-Peebles conjecture for stability in connection with visible bodies of galaxies, instead of Ostriker-Peebles criterion for stability in connection with self-gravitating fluids
Bronchodilation test in allergic adolescents.
No full textThis study highlights the close link between upper and lower airways and the relevance of bronchodilation test in patients presenting with moderate-severe persistent allergic rhinitis and mild persistent asthma
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