V Simpósio Sergipano de Buiatria e II Ciclo de Atualização na Buiatria de Sergipe

O V Simpósio Sergipano de Buiatria (V SISEB), promovido pelo Grupo de Iniciação Científica e Extensão em Buiatria (GICEB) da Faculdade Pio Décimo, Aracaju, Sergipe, apresenta nesse suplemento da Revista de Medicina Veterinária da UFRPE seus Anais contendo trabalhos científicos e relatos de casos, realizados em Sergipe e em outros Estados da região Nordeste, selecionadas por colaboradores ad hoc, abordando as temáticas relacionados a: clínica cirúrgica e anestesiologia, clínica médica, doenças infectocontagiosas, doenças parasitárias, enfermidades metabólicas, tóxicas e intoxicações, extensão rural, patologia, patologia clínica, produção animal e reprodução de bovinos, caprinos e ovinos, além de revisões de algumas das palestras ministradas no evento.  A publicação dos Anais do V SISEB, é uma forma de registro e compartilhamento de resultados e experiências, levando a educação continuada de discentes e profissionais de medicina veterinária e zootecnia, através da discussão interdisciplinar em torno das peculiaridades da Buitria Sergipana.  Tais resumos foram instrumentos do prêmio “Demetro Dantas Reis” de melhor trabalho científico e relato de caso apresentado no V SISEB, onde as avaliações foram realizadas por integrantes de grupos de estudos de ruminantes do Nordeste, sendo os contemplados: “Estudo retrospectivo de doenças metabólicas, carenciais e intoxicações dos ruminantes atendidos no Ambulatório de Grandes Animais do DMV/UFRPE” e “Tratamento de Dermatite Interdigital Infecciosa Ovina com fototerapia dinâmica antimicrobiana e fototerapia a laser”. O prêmio presta homenagem ao ex-integrante do GICEB, que atendia pelo apelido "carinhoso" de Coronel, dado a sua personalidade forte e dedicação, principalmente em relação a profissão de médico veterinário que exerceu de forma honrosa, até a fatalidade ocorrida durante o exercício da mesma que lhe custou a vida. Aos colegas e parentes restaram as boas lembranças e através desse prêmio, a família GICEB busca demonstrar a significância da passagem de Demetro em nossas vidas. Agradecemos aos congressistas, docentes e integrantes do GICEB, que nessa quinta edição do evento dão continuidade com o compromisso de mobilizar e capacitar os profissionais atuantes na Buiatra Sergipana

Low energy constraints on orbifold models

We review the low energy limits on Kaluza-Klein excitations in orbifold models. New vector-like quarks, as well as new Z' gauge bosons, can be accommodated with masses observable at large colliders.Comment: Presented at RADCOR 2002, to appear in the proceeding

Black Hole Production at the LHC by Standard Model Bulk Fields in the Randall-Sundrum Model

We consider the production of black holes at the LHC in the Randall-Sundrum(RS) model through the collisions of Standard Model(SM) fields in the bulk. In comparison to the previously studied case where the SM fields are all confined to the TeV brane, we find substantial suppressions to the corresponding collider cross sections for all initial states, i.e., $gg$, $qq$ and $gq$, where $q$ represents a light quark or anti-quark which lie close to the Planck brane. For $b$ quarks, which are closer to the TeV brane, this suppression effect is somewhat weaker though $b$ quark contributions to the cross section are already quite small due to their relatively small parton densities. Semi-quantitatively, we find that the overall black hole cross section is reduced by roughly two orders of magnitude in comparison to the traditional TeV brane localized RS model with the exact value being sensitive to the detailed localizations of the light SM fermions in the bulk.Comment: 14 pages, 3 figs; refs and discussion adde

Probe a family non-universal Z' boson effects in B(s)-> phi mu(+) mu(-)decay

Motivated by the recent measurement on ${\cal B}(\bar{B}_s\to \phi \mu^+\mu^-)$ by CDF collaboration, we study the effects of a family non-universal $Z^{\prime}$ boson on rare semileptonic $\bar{B}_s \to \phi\mu^+\mu^-$ decay. In our evaluations, we analyze the dependences of the dimuon invariant mass spectrum and normalized forward-backward asymmetry on $Z^{\prime}$ couplings and show that these observables are highly sensitive to new $Z^{\prime}$ contributions. Three limiting scenarios are presented in the detailed analyses. Numerically, within the allowed ranges of $Z^{\prime}$ couplings under the constraints from $\bar{B}_s-B_s$ mixing, $B\to\pi K$, $\bar{B}_d\to(X_s,K,K^{\ast})\mu^+\mu^-$ decays and so on, ${\cal B}(\bar{B}_s\to \phi \mu^+\mu^-)$ and $A_{FB}^{(L)}(\bar{B}_s\to \phi \mu^+\mu^-)$ could be enhanced by about 96% and $17$ respectively at most by $Z^{\prime}$ contributions. However, ${\cal B}(\bar{B}_s\to \phi \mu^+\mu^-)$ is hardly to be reduced. Furthermore, the zero crossing in $A_{FB}(\bar{B}_s\to \phi \mu^+\mu^-)$ spectrum at low dimuon mass always exists.Comment: 16 pages, 3 figures, 4 table; accepted by Nucl. Phys.

The g-2 of the Muon in Localized Gravity Models

The (g-2) of the muon is well known to be an important model building constraint on theories beyond the Standard Model. In this paper, we examine the contributions to $(g-2)_\mu$ arising in the Randall-Sundrum model of localized gravity for the case where the Standard Model gauge fields and fermions are both in the bulk. Using the current experimental world average measurement for $(g-2)_\mu$, we find that strong constraints can be placed on the mass of the lightest gauge Kaluza-Klein excitation for a narrow part of the allowed range of the assumed universal 5-dimensional fermion mass parameter, $\nu$. However, employing both perturbativity and fine-tuning constraints we find that we can further restrict the allowed range of the parameter $\nu$ to only one fourth of its previous size. The scenario with the SM in the RS bulk is thus tightly constrained, being viable for only a small region of the parameter space.Comment: 16 pages, 2 figs, LaTex, Additional discussion adde

Ascending aorta measurements as assessed by ECG-gated multi-detector computed tomography: a pilot study to establish normative values for transcatheter therapies

The aim of this study was to provide an insight into normative values of the ascending aorta in regards to novel endovascular procedures using ECG-gated multi-detector CT angiography. Seventy-seven adult patients without ascending aortic abnormalities were evaluated. Measurements at relevant levels of the aortic root and ascending aorta were obtained. Diameter variations of the ascending aorta during cardiac cycle were also considered. Mean diameters (mm) were as follows: LV outflow tract 20.3 ± 3.4, coronary sinus 34.2 ± 4.1, sino-tubular junction 29.7 ± 3.4 and mid ascending aorta 32.7 ± 3.8 with coefficients of variation (CV) ranging from 12 to 17%. Mean distances (mm) were: from the plane passing through the proximal insertions of the aortic valve cusps to the right brachio-cephalic artery (BCA) 92.6 ± 11.8, from the plane passing through the proximal insertions of the aortic valve cusps to the proximal coronary ostium 12.1 ± 3.7, and between both coronary ostia 7.2 ± 3.1, minimal arc of the ascending aorta from left coronary ostium to right BCA 52.9 ± 9.5, and the fibrous continuity between the aortic valve and the anterior leaflet of the mitral valve 14.6 ± 3.3, CV 13-43%. Mean aortic valve area was 582.0 ± 131.9mm2. The variation of the antero-posterior and transverse diameters of the ascending aorta during the cardiac cycle were 8.4% and 7.3%, respectively. Results showed large inter-individual variations in diameters and distances but with limited intra-individual variations during the cardiac cycle. A personalized approach for planning endovascular devices must be considere

Resolving the A_{FB}^b puzzle in an extra dimensional model with an extended gauge structure

It is notorious that, contrary to all other precision electroweak data, the forward-backward asymmetry for b quarks $A_{FB}^b$ measured in Z decays at LEP1 is nearly three standard deviations away from the predicted value in the Standard Model; significant deviations also occur in measurements of the asymmetry off the Z pole. We show that these discrepancies can be resolved in a variant of the Randall-Sundrum extra-dimensional model in which the gauge structure is extended to $SU(2)_L \times SU(2)_R \times U(1)_X$ to allow for relatively light Kaluza-Klein excitations of the gauge bosons. In this scenario, the fermions are localized differently along the extra dimension, in order to generate the fermion mass hierarchies, so that the electroweak interactions for the heavy third generation fermions are naturally different from the light fermion ones. We show that the mixing between the Z boson with the Kaluza-Klein excitations allows to explain the $A_{FB}^b$ anomaly without affecting (and even improving) the agreement of the other precision observables, including the $Z \to bb$ partial decay width, with experimental data. Some implications of this scenario for the ILC are summarized.Comment: 23 pages, 5 figure

Bulk Physics at a Graviton Factory

A general prediction of the 5-d Randall-Sundrum (RS) hierarchy model is the emergence of spin-2 Kaluza Klein (KK) gravitons with weak scale masses and couplings. The lowest order effective theory of the RS model is given by 5-d Einstein gravity which uniquely fixes the self-interactions of gravitons. We demonstrate that large numbers of light KK resonances could be produced at a future lepton-collider-based ``Graviton Factory''. Measuring the self-interactions of these KK gravitons will probe the accuracy of the 5-d Einstein gravity picture and, in addition, yield indirect information on the as yet untested self-coupling of the 4-d graviton. The self-interactions of the gravitons can be studied by measuring the decays of the heavier states to the lighter ones. Using the AdS/CFT picture, these can be interpretted as the decays of heavier resonances to lighter ones, in a strongly coupled 4-d CFT. We show that these decays have sufficient rates to be studied at future colliders and that they are also, in principle, sensitive to higher derivative operators, such as the Gauss-Bonnet term. In a generalized RS model, with non-universal 5-d fermion masses, FCNC's will be induced. We show that precise measurements of the rare decays of KK graviton/gauge states into flavor non-diagonal final states at a Graviton Factory can be used to map the 5-d fermion mass matrix.Comment: Latex, 11 pages, 2 figures. Comments regarding the calculation and the AdS/CFT correspondence adde

A Network of Transdisciplinary Observation Mechanisms as a Digital Source of Knowledge on Rangeland, to Communicate and Exchange at Local, Regional and Global Scales

For several decades, interventions geared towards the development of drylands have been the catalysts of much change in a rapidly evolving world, and learning how to build sustainable trajectories that take into account both cultural and contextual variations is becoming of increasingly great import. As local problems become intertwined, and given the difficulty of large-scale collective action, understanding these dynamics requires cognizance of all levels of knowledge governance systems and their interactions. So far as rangelands are concerned, the lack of easily accessible documentation encompassing all knowledge to date is a major impediment to their sustainable development. With this in mind, polycentric governance would allow for centralized decision-making, which would then give rise to solutions that could be adapted to local conditions. Recent advances in technology and the proliferation of data are creating new opportunities for monitoring the progress and performance of multi-scale development efforts, and indeed new and non-traditional data sources will be paramount to the success of such endeavours. For instance, participatory observation is an emerging example of a non-traditional data source that is already making a significant contribution, and has fostered engagement at the community level. We seek to demonstrate the value of implementing transdisciplinary observation mechanisms—here, in relation to Southern Countries’ pastoral systems—and to provide concrete examples of how such mechanisms can be adopted for mainstreaming the use of data from a variety of sources, thereby facilitating the implementation of a sustainable development agenda as part of a continuous learning process. This project has been managed within the framework of the Agadir Platform, infrastructure supported and implemented by Ibn-Zohr University, Morocco

Is Bluetongue Virus a Risk Factor for Reproductive Failure in Tropical Hair Sheep in Brazil?

Background: Bluetongue is a vector-borne viral disease transmitted by midges from the genus Culicoides. The disease can infect most of the ruminant and camelid species, but the severe disease is most often seen in european wool and mutton sheep breeds. In this sense, there is a gap in the knowledge on BTV infection in hair sheep breeds from tropical zones. Thus, this study aimed at establishing whether exposure to BTV is a risk factor for reproductive failure in Santa Inês ewes, a hair sheep breed, reared under tropical conditions in Brazil.Materials, Methods & Results: A retrospective cross-sectional study was carried out in sheep farms in São Paulo state, Brazil, after the rainy season. Serum samples from 110 Santa Inês ewes with a history of reproductive disorders, in the last 6 months, which were included: abortion, premature birth, stillbirth, retention of placenta, infertility, estrus repetition, fetal malformation, weak lamb birth and neonatal death were collected. The presence of antibodies against BTV was assessed by agar gel immunodiffusion method (AGID). Serology to the infectious agents Brucela ovis, Lepstopira spp., Toxoplasma gondii, Neospora caninum and Campylobacter sp. were also assessed. Bivariate associations between the outcome and individual explanatory variables were assessed using the Fisher's exact test. Abortion was the most common reproductive disorder (53%; 74/139) observed, followed by estrus repetition (12%; 17/139) and infertility (11%; 15/139). Other disorders related to the conceptus totaled nearly one fourth of the reported disorders. A total of 20% (22/110) of the ewes were seropositive to BTV. A higher frequency of BTV seropositive than BTV seronegative ewes with a history of abortion was found. Also, abortion with seroreactivity to BTV was tested for prevalence ratio that showed 1.38 [95% CI 1.10-1.74; P = 0.030]. With regards to the abortion involvement of other infectious diseases associated with the seropositive ewes to BTV, more than a half of ewes (53%; 10/19) were solely seropositive for BTV.Discussion: In the current study, it was detected 20% (22/110) of seropositive ewes to BTV. These findings demonstrated that even though the BTV has been considered endemic in tropical countries such as Brazil, there are regions or microclimates in which the virus cannot be present or in varied prevalence. The history of abortion was identified as the potential factor associated with BTV seropositivity in Santa Ines ewes. Equally, the differential diagnosis for other infectious agents related to abortion demonstrated the unique presence of antibodies against BTV in more than half of all cases. Other studies with native sheep flocks in Iran and Nepal also demonstrated a strong positive correlation between abortion history and seropositivity for BTV. Thus, it is possible that in other continents of the world, under tropical conditions, the virus does not behave the same asymptomatic infection such as have been reported for native sheep breeds in Africa. In conclusion, it was demonstrated that one-fifth animals were positive for antibodies against BTV clearly implying the viral spreading in the local hair sheep flocks. These findings highlight the importance of surveillance related to BTV in endemic areas. Therefore, it is recommended to strengthen the surveillance system for BTV within Brazil and to educate farmers about the management and control of this disease.