Inner and outer rings are not strongly coupled with stellar bars

We study the frequency and dimensions of inner and outer rings in the local Universe as a function of disk parameters and the amplitude of non-axisymmetries. We use the 1320 not-highly inclined disk galaxies ($i<65^{\circ}$) from the S$^4$G survey. The ring fraction increases with bar Fourier density amplitude: this can be interpreted as evidence for the role of bars in ring formation. The sizes of inner rings are positively correlated with bar strength: this can be linked to the radial displacement of the 1/4 ultra-harmonic resonance while the bar grows and the pattern speed decreases. The ring intrinsic ellipticity is weakly controlled by the non-axisymmetric perturbation strength: this relation is not as strong as expected from simulations, especially when we include the dark matter halo in the force calculation. The ratio of outer-to-inner ring semi-major axes is uncorrelated with bar strength: this questions the manifold origin of rings. In addition, we confirm that i) $\sim 1/3$ ($\sim 1/4$) of the galaxies hosting inner (outer) rings are not barred; ii) on average, the sizes and shapes of rings are roughly the same for barred and non-barred galaxies; and iii) the fraction of inner (outer) rings is a factor of $1.2-1.4$ ($1.65-1.9$) larger in barred galaxies than in their non-barred counterparts. Finally, we apply unsupervised machine learning (Self-Organizing Maps, SOMs) to show that, among early-type galaxies, ringed or barred galaxies cannot be univocally distinguished based on 20 internal and external fundamental parameters. We confirm, with the aid of SOMs, that rings are mainly hosted by red, massive, gas-deficient, dark-matter poor, and centrally concentrated galaxies. We conclude that the present-day coupling between rings and bars is not as robust as predicted by numerical models (Abridged)

EVALUATION OF THE HEMATOLOGY TEST IN THE DIAGNOSIS OF CANINE EHRLICHIOSIS

Se determinó el grado de concordancia entre el examen hematológico y la prueba de ELISA directa en el diagnóstico de ehrlichiosis canina. Se emplearon 77 muestras de sangre de perros con signos clínicos compatibles a ehrlichiosis canina y 20 controles clínicamente normales que fueron obtenidos en la Clínica de Animales Menores de la Universidad Nacional Mayor de San Marcos. Se encontró un 84.7 ± 11.0% de grado de concordancia mediante la prueba de Kappa. Así mismo, se determinó que la trombocitopenia, leucopenia, anemia y el antecedente de contacto con garrapatas tuvieron una relación significativa con la presencia de la enfermedad (p&lt;0.05). Se concluye que el examen hematológico es muy importante en el diagnóstico de la ehrlichiosis canina y que el ELISA directo es una excelente prueba confirmatoriaThe present study evaluated the level of agreement between the hematology test and the direct ELISA assay for the diagnosis of canine ehrlichiosis. It was used 77 samples from dogs with clinical signs compatible with canine ehrlichiosis and 20 control samples from the Hospital of Small Animals of the Veterinary Medicine Faculty, San Marcos National University. The results showed 84.7 ± 11.0% of concordance by the Kappa test. Likewise, the thrombocytopenia, leukopenia, anemia and history of tick infestation were significantly related (p&lt;0.05) to clinical evidence of the disease. The results revealed that the hematology test was important in the diagnosis of canine ehrlichiosis and that the direct ELISA was an excellent confirmatory test

Alergia a la proteína de leche de vaca en la infancia: microbiota, hidrolizados y tolerancia

Trabajo presentado al XIII Workshop Sociedad Española de Microbiota, Probióticos y Prebióticos, celebrado en Valencia (España), del 7 la 9 de junio de 2022.Introducción La alergia a proteínas de leche de vaca (APLV) es la alergia alimentaria más frecuente en la infancia, habiéndose descrito posibles relaciones con la microbiota intestinal y con el tipo de alimentación. El objetivo de este trabajo es profundizar en el estudio de la microbiota intestinal en menores de un año con APLV y su relación con la adquisición de tolerancia y dieta, comparando muestras al diagnóstico y a los 6 meses de seguimiento con dieta de exclusión láctea. Metodología Se reclutaron 22 pacientes diagnosticados con APLV (14 mediados por IgE y 8 no mediados) y un grupo control de 25 niños sanos. Se recogieron muestras de heces y se realizó un análisis metataxonómico del ADNr 16S y de las regiones ITS de bifidobacterias por secuenciación. Se evaluaron las características clínico-epidemiológicas de los pacientes y se realizó un seguimiento a los 6 meses para evaluar tolerancia y el uso de distintas fórmulas terapéuticas de sustitución alimentaria. Resultados Se detectó un mayor porcentaje de secuencias pertenecientes al filo Actinobacteria (¿60%) en controles frente a casos (¿30%) al diagnóstico. Además, el patrón de abundancias relativas de bifidobacterias fue diferente entre controles y pacientes no mediados por IgE, con una menor proporción de B. longum en estos últimos. Tras la dieta de exclusión, sólo 3 de los pacientes, que estaban tomando distintos tipos de fórmulas terapéuticas, adquirió tolerancia, de los cuales 2 eran casos no mediados por IgE. Conclusiones En los pacientes APLV no IgE mediada se observaron perfiles microbianos distintos de los lactantes sanos, encontrándose a su vez en este grupo una mayor tolerancia al cabo de 6 meses. En tratamiento y seguimiento de la APLV la determinación de la microbiota intestinal puede ser clave para establecer posibles vínculos con la adquisición de tolerancia y el tipo de hidrolizado

DETECCIÓN SEROLÓGICA DE Ehrlichia canis y Ehrlichia chaffeensis EN PERSONAL DE CLÍNICAS VETERINARIAS EN LIMA METROPOLITANA

The aim of the present study was to detect seropositivity against Ehrlichia canis and Ehrlichia chaffeensis in staff of veterinary clinics and in persons that had contact with dogs affected by canine ehrlichosis using the indirect immunofluorescence test. Ninety serum samples were used, 55 men and 35 women. Results indicated 23.3% of seropositivity to E. canis and 20.0% to E. chaffeensis, without statistical differences due to gender.El objetivo del presente estudio fue determinar la presencia de seropositividad a Ehrlichia canis y Ehrlichia chaffeensis en personal de clínicas veterinarias y en personas en contacto con canes con Ehrlichiosis canina, utilizando la prueba de inmunofluorescencia indirecta. Se emplearon 90 muestras de suero de 55 varones y 35 mujeres. Se encontró 23.3% de seropositividad a E. canis y 20.0% a E. chaffeensis, sin asociación estadística por efecto de género

Neonatal retroauricular cellulitis as an indicator of group B streptococcal bacteremia: a case report

<p>Abstract</p> <p>Introduction</p> <p>The relation between cellulitis and Group B streptococcus infection in newborns and small infants was first reported during the early 1980s and named cellulitis-adenitis syndrome. We report a case of a neonate with cellulitis-adenitis syndrome in an unusual location (retroauricular).</p> <p>Case presentation</p> <p>A 21-day-old Caucasian female infant was brought to the emergency department with fever, irritability and a decreased appetite. Physical examination revealed erythema and painful, mild swelling in the right retroauricular region. The blood count and C-reactive protein level were normal. She was treated with ceftriaxone. The fever and irritability were resolved after 24 hours, and the cellulitis was clearly reduced after two days of hospitalization. Blood culture yielded Group B streptococcus.</p> <p>Conclusion</p> <p>A thorough evaluation must be done, and lumbar punctures for infants with cellulitis must be considered. We emphasize the lack of data about acute phase reactants to predict bacteremia and meningitis and to adjust the duration of parenteral antibiotic therapy to address this syndrome.</p

Refractive results after topography-guided anterior lamellar keratoplasty with excimer laser in keratoconus grade III

Objetivo: determinar los resultados refractivos y funcionales en operados de queratoplastia lamelar anterior superficial asistida con láser excimer topográfico en queratocono grado III. Materiales y métodos: estudio experimental, abierto, no controlado, longitudinal &nbsp;y prospectivo, en 35 ojos de 31 pacientes con edad promedio de 35,3 años, seguimiento entre 12 y 51 meses, operados en la Clínica Internacional de Retinosis Pigmentaria “Camilo Cienfuegos”, entre enero de 2006 y diciembre del 2010. Resultados: la agudeza visual sin corrección mejoró de 0,04 a 0,39 y la agudeza visual con corrección de 0,28 a 0,78; el equivalente esférico se redujo de -13,02 a -1,69; la esfera y el cilindro disminuyeron de -10,13D ± 4,73 a -0,44D ± 3,22 y de -5,67D ± 2,32 a -2,52D ± 1,38, respectivamente. La queratometría disminuyó de 56,8D y 51,53D a 45,02 y 42,02 en el posoperatorio. La densidad celular preoperatoria fue de 2313,81 cel/mm2 ± 322,10; varió a 2170 cel/mm2 ± 294,92 en el posoperatorio. El lecho residual estromal fue de 153,22 μ. Discusión: en correlación con la literatura, el queratocono se presenta en la adolescencia y la juventud y conduce al trasplante de córnea con más frecuencia en estas etapas de la vida. La queratometría promedio posoperatoria fue inferior a la reportada por otros investigadores que realizaron estudios con semejante técnica quirúrgica. Conclusiones: la queratoplastia lamelar anterior superficial con láser excimer, puede ser considerada como indicación primaria de tratamiento en el queratocono grado III (MÉD.UIS. 2012;25(3):195-202)Objective: determine refractive and functional results in patients with keratoconus grade III underwent to topography-guided anterior lamellar keratoplasty assisted with excimer laser. Materials and Methods: uncontrolled experimental study, longitudinal and prospective, in 35 eyes of 31 patients with an average age of 35.3 years old, followed between 12 and 51 moths; operated at “Camilo Cienfuegos” International Center of Retinitis Pigmentosa, between January 2006 and December 2010. Results: the uncorrected visual acuity improved from 0.04 to 0.39 and the best corrected visual acuity improved from 0.28 to 0.78; the spherical equivalent was reduced from -13.02 to -1.69D. The sphere and cylinder decreased from -10.13D ± 4.73 to -0.44D ± 3.22 and from -5.67D ± 2.32 to -2.52 ±1.38, respectively. The average of the keratometry decreased from 56.8D and 51.53D to 45.02 and 42.02 in the post-surgery. The cellular density pre-surgery changed from 2313.81 cel/mm2 ± 322.10 to 2170 cel/mm2 ± 294.92 in postoperative. The residual stromal bed was 153.22 μ. Discussion: in correlation with the literature, the keratoconus appears in the adolescence and youth, leading to the corneal transplantation more often in these life stages. The average postsurgical keratometry was inferior to the reported by others investigators who practiced procedures with similar surgical technique. Conclusions: superficial anterior lamellar keratoplasty, assisted with excimer laser, can be considered as primary indication of treatment in keratoconus grade III (MÉD.UIS. 2012;25(3):195-202). &nbsp

Genetic and Phenotypic Characterization of the Etiological Agent of Canine Orchiepididymitis Smooth Brucella sp. BCCN84.3

Members of the genus Brucella cluster in two phylogenetic groups: classical and non-classical species. The former group is composed of Brucella species that cause disease in mammals, including humans. A Brucella species, labeled as Brucella sp. BCCN84.3, was isolated from the testes of a Saint Bernard dog suffering orchiepididymitis, in Costa Rica. Following standard microbiological methods, the bacterium was first defined as "Brucella melitensis biovar 2." Further molecular typing, identified the strain as an atypical "Brucella suis." Distinctive Brucella sp. BCCN84.3 markers, absent in other Brucella species and strains, were revealed by fatty acid methyl ester analysis, high resolution melting PCR and omp25 and omp2a/omp2b gene diversity. Analysis of multiple loci variable number of tandem repeats and whole genome sequencing demonstrated that this isolate was different from the currently described Brucella species. The smooth Brucella sp. BCCN84.3 clusters together with the classical Brucella Glade and displays all the genes required for virulence. Brucella sp. BCCN84.3 is a species nova taxonomical entity displaying pathogenicity; therefore, relevant for differential diagnoses in the context of brucellosis. Considering the debate on the Brucella species concept, there is a need to describe the extant taxonomical entities of these pathogens in order to understand the dispersion and evolution