RESUMO
Bovine viral diarrhea virus (BVDV) and bovine gammaherpesvirus 4 (BoHV-4) infect the uterus of cattle, being responsible for huge economic losses. Most of the pathogenesis of BoHV-4 in the bovine reproductive tract has been elucidated by conducting tests on primary cultures. Thus, it is important to have optimal in vitro conditions, avoiding the presence of other pathogens that can alter the results. BVDV is one of the most frequent viral contaminants of cell cultures. Considering that non-cytopathic (NCP) BVDV biotype can generate persistently infected (PI) cattle, which are the major source for virus transmission in susceptible herds, it is important to check products derived from cattle that are intended to be used in research laboratories. The aim of this work was to evaluate how the natural infection of bovine endometrial cells (BEC) with a NCP BVDV strain (BEC + BVDV) affects BoHV-4 replication. We have demonstrated a delay in BoHV-4 gene expression and a decrease in viral load in the extracellular environment in BEC + BDVD cells compared to BEC (BVDV-free) cells. These results confirm that replication of BoHV-4 in BEC primary cultures is affected by previous infection with BVDV. This finding highlights the importance of ruling out BVDV infection in bovine primary cell cultures to avoid biological interference or misinterpretation of results at the time of performing in vitro studies with BoHV-4.
Assuntos
Doença das Mucosas por Vírus da Diarreia Viral Bovina , Coinfecção , Vírus da Diarreia Viral Bovina Tipo 1 , Vírus da Diarreia Viral Bovina , Animais , Bovinos , Coinfecção/veterinária , Diarreia , FemininoRESUMO
In vitro cell cultures are widely used models for dissecting cellular and molecular mechanisms that lead to certain physiological conditions and diseases. The pathogenesis of BoHV-4 in the bovine reproductive tract has been studied by conducting tests on primary cultures. However, many questions remain to be answered about the role of BoHV-4 in endometrial cells. The aim of this study was to compare the replication and gene expression of BoHV-4 in cell lines and bovine reproductive tract primary cells as an in vitro model for the study of this virus. We demonstrated that BoHV-4 strains differ in their in vitro growth kinetics and gene expression but have the same cell type preference. Our results demonstrate that BoHV-4 replicates preferentially in bovine endometrial cells (BEC). However, its replication capacity extends to various cell types, since all cells that were tested were permissive to BoHV-4 infection. The highest virus titers were obtained in BEC cells. Nevertheless, virus replication efficiency could not be fully predicted from the mRNA expression profiles. This implies that there are multiple cell-type-dependent factors and strain properties that determine the level of BoHV-4 replication. The results of this study provide relevant information about the in vitro behavior of two field isolates of BoHV-4 in different cell cultures. These findings may be useful for the design of future in vitro experiments to obtain reliable results not only about the pathogenic role of BoHV-4 in the bovine female reproductive tract but also in the development of efficient antiviral strategies.
Assuntos
Expressão Gênica/genética , Herpesvirus Bovino 4/genética , Replicação Viral/genética , Animais , Bovinos , Doenças dos Bovinos/virologia , Linhagem Celular , Endométrio/virologia , Feminino , Infecções por Herpesviridae/virologia , Humanos , RNA Mensageiro/genética , Carga Viral/genéticaRESUMO
Resumen El pénfigo vulgar es una enfermedad ampollar crónica de etiología autoinmune, en la cual el diagnóstico y tratamiento precoz disminuye la morbimortalidad de los pacientes. Actualmente se utilizan corticosteroides de primera línea asociados a inmunosupresores. Sin embargo,se ha visto que el uso de Rituximab como terapéutica de primera elección en los países desarrollados ha disminuido las reacciones adversas, con lo que mejora la calidad de vida de los pacientes. Se presentan cinco pacientes con diagnóstico de pénfigo vulgar refractario a tratamientos convencionalesque requirieron tratamiento con Rituximab.
Abstract Pemphigus vulgaris is an autoimmune chronic blistering disease. Its early diagnosis and treatment help reduce patient mortality and morbidity. Corticosteroids associated with immunosuppressants remain the standard treatment for pemphigus vulgaris. However, the use of Rituximab as first-line therapy in developed countries has been effective in reducing adverse effects improving the quality of life of patients. We report five patients with a diagnosis of pemphigus vulgaris refractory to conventional treatments requiring treatment with Rituximab.
RESUMO
Worldwide, more than 170 million people are chronically infected with the hepatitis C virus (HCV) and every year die more than 350,000 people from HCV-related liver diseases. Recently, HCV was reclassified into seven major genotypes and 67 subtypes. Some subtypes as 1a, 1b and 3a, have become epidemic as a result of the new parenteral transmission routes and are responsible for most HCV infections in Western countries. HCV 1a subtype have been sub-categorized into two separate sub clades. Recent studies based on the analysis of NS5B genome region, reveal that HCV epidemics in Argentina and Brazil are characterized by multiple introductions events of subtypes 1a, 1b and 3a, followed by subsequent local dispersion. There is no data about HCV genotypes circulating in Uruguay and their evolutionary and demographic history. To this end, a total of 153 HCV NS5B gene sequences were obtained from Uruguayan patients between 2005 and 2011. 86 (56%) sequences grouped with subtype 1a, 40 (26%) with subtype 3a and 27 (18%) with subtype 1b. Furthermore, subtype 1a sequences were distributed among both clades, 1 (n=62, 72%) and 2 (n=24, 28%). Four local HCV clades were found: UY-1a(I), UY-1a(II), UY-1a(III) and UY-3a; comprising a 39% of all HCV viruses analyzed in this study. HCV epidemic in Uruguay has been driving by multiple introductions of subtypes 1a, 1b and 3a and by local dissemination of a few country-specific strains. The evolutionary and demographic history of the major Uruguayan HCV clade UY-1a(I) was reconstructed under two different molecular clock rate models and displayed an epidemic history characterized by an initial phase of rapid expansion followed by a more recent reduction of growth rate since 2000-2005. This is the first comprehensive study about the molecular epidemiology and epidemic history of HCV in Uruguay.
Assuntos
Genoma Viral , Genótipo , Hepacivirus/genética , Hepatite C/virologia , Argentina/epidemiologia , Brasil/epidemiologia , Evolução Molecular , Hepacivirus/classificação , Hepacivirus/isolamento & purificação , Hepatite C/epidemiologia , Humanos , Epidemiologia Molecular , Filogenia , RNA Viral/genética , Análise de Sequência de RNA , UruguaiRESUMO
Population genetic analyses based on both mitochondrial cytochrome b and the internal transcribed spacer 2 of recombinant (r)DNA genes were implemented to examine hypotheses of population differentiation in the angular angel shark Squatina guggenheim, one of the four most-widespread endemic species inhabiting coastal ecosystems in the south-western Atlantic Ocean. A total of 82 individuals of S. guggenheim from 10 sampling sites throughout the Río de la Plata mouth, its maritime front, the outer shelf at the subtropical confluence and the coastal areas of the south-west Atlantic Ocean, were included. The analysis of molecular variance (AMOVA) based on the second internal transcribed spacer (its-2) region supports that the samples from the outer shelf represent an isolated group from other sites. Historical gene flow in a coalescent-based approach revealed significant immigration and emigration asymmetry between sampling sites. Based on the low level of genetic diversity, the existence of a long-term population decline or a past recent population expansion following a population bottleneck could be proposed in S. guggenheim. This demographic differentiation suggests a degree of vulnerability to overexploitation in this endemic and endangered south-west Atlantic Ocean shark, given its longevity and low reproductive potential.
Assuntos
Variação Genética , Genética Populacional , Tubarões/genética , Animais , Oceano Atlântico , Citocromos b/genética , DNA Mitocondrial/genética , DNA Espaçador Ribossômico/genética , Feminino , Fluxo Gênico , Haplótipos , Masculino , Modelos Genéticos , Análise de Sequência de DNARESUMO
Members of the Fusarium graminearum species complex (FGSC) are the primary cause of Fusarium head blight (FHB) of wheat, and frequently contaminate grain with trichothecene mycotoxins that pose a serious threat to food safety and animal health. The species identity and trichothecene toxin potential of 151 FGSC isolates collected from wheat in Uruguay were determined via multilocus genotyping. Although F. graminearum with the 15ADON trichothecene type accounted for 86% of the isolates examined, five different FGSC species and all three trichothecene types were identified in this collection. This is the first report of Fusarium asiaticum, Fusarium brasilicum, Fusarium cortaderiae, and Fusarium austroamericanum from Uruguay. In addition, we observed significant (P<0.001) regional differences in the composition of FGSC species and trichothecene types within Uruguay. Isolates of F. graminearum with the 15ADON type were the most prevalent in western provinces (95%), while F. asiaticum (43%) and the NIV type (61%) predominated in the new wheat production zone in Cerro Largo along Uruguay's eastern border with Brazil. F. graminearum isolates (15ADON type) were significantly (P<0.005) more aggressive on wheat than were isolates from the other species examined (NIV or 3ADON types). However, F. graminearum isolates (15ADON type) were significantly (P<0.05) more sensitive to tebuconazole than isolates from other species (NIV type). These results document substantial heterogeneity among the pathogens responsible for FHB in Uruguay. In addition, the regional predominance of the NIV trichothecene type is of significant concern to food safety and indicates that additional monitoring of nivalenol levels in grain may be required.
Assuntos
Biodiversidade , Microbiologia de Alimentos , Fusarium/classificação , Fusarium/genética , Tricotecenos/genética , Triticum/microbiologia , Fungicidas Industriais/farmacologia , Fusarium/química , Fusarium/efeitos dos fármacos , Genótipo , Medição de Risco , Triazóis/farmacologia , UruguaiRESUMO
Bovine herpesvirus 4 (BoHV-4) is a γ-herpesvirus that has been isolated both from apparently healthy animals and from cattle with a variety of clinical signs, including post-partum endometritis and abortion. BoHV-4 causes either a persistent or a latent infection in cells of the monocyte/macrophage lineage. Two groups of BoVH-4 strains have been defined based on their restriction patterns: the Movar-like strains (European prototype) and the DN 599-like strains (American prototype). The purpose of the present study was to genetically characterize wild type BoHV-4 strains isolated from vaginal discharges of aborted cows in Argentina. The virus was identified by isolation and nested PCR in all vaginal discharge samples from aborted cows, either as a sole agent or in association with other pathogens. Restriction enzyme profiling and phylogenetic analysis demonstrated that there is a high genetic variability among the studied field isolates. The existence of three groups of strains, which were designated as genotypes 1, 2 and 3, is described. Genotypes 1 and 2 possibly correspond to the Movar-like and DN 599-like groups, respectively, whereas Genotype 3 corresponds to a novel group. Two viral strains did not cluster into any of these three groups, indicating that other genotypes could be circulating in Argentina. These results suggest a complex epidemiological background for the Argentinean BoHV-4 strains, probably influenced by independent events of genetic drift. This hypothesis cannot be rejected based on the available data. However, there is no direct evidence supporting this possibility. Thus, it seems speculative to suggest that interspecific jumps are responsible for the observed phylogenetic grouping. On the other hand, our analyses suggest a geographical structure for the observed viral genotypes, since genotypes 1 and 2 included the European (Movar-like) and American (DN599-like) reference strains, respectively. Geographic dispersion is known to be a driver of herpes viruses diversification, and independent evolution in geographical isolated places ensures the emergence of particular mutations in each location due to genetic drift (Compans, 2007; Zong et al., 1999). Therefore, at this point, the genetic drift hypothesis is the one that requires less ad-hoc considerations and thus, to our understanding, is the one that fits to the findings from this study. The involvement of this genetic variability in the detection and pathogenesis of BoHV-4 remains to be investigated.
Assuntos
Doenças dos Bovinos/virologia , Infecções por Herpesviridae/veterinária , Herpesvirus Bovino 4/genética , Aborto Animal/virologia , Animais , Argentina , Bovinos , Doenças dos Bovinos/genética , Linhagem Celular , Feminino , Infecções por Herpesviridae/genética , Infecções por Herpesviridae/virologia , Herpesvirus Bovino 4/isolamento & purificação , Filogenia , Reação em Cadeia da Polimerase/métodos , Reação em Cadeia da Polimerase/veterinária , Gravidez , Vagina/virologia , Esfregaço Vaginal/veterináriaRESUMO
A doubled haploid (DH) barley (Hordeum vulgare L.) population of 334 lines (ND24260 × Flagship) genotyped with DArT markers was used to map genes for adult plant resistance (APR) to leaf rust (Puccinia hordei Otth) under field conditions in Australia and Uruguay. The Australian barley cultivar Flagship carries an APR gene (qRphFlag) derived from the cultivar Vada. Association analysis and composite interval mapping identified two genes conferring APR in this DH population. qRphFlag was mapped to the short arm of chromosome 5H (5HS), accounting for 64-85% of the phenotypic variation across four field environments and 56% under controlled environmental conditions (CEC). A second quantitative trait locus (QTL) from ND24260 (qRphND) with smaller effect was mapped to chromosome 6HL. In the absence of qRphFlag, qRphND conferred only a low level of resistance. DH lines displaying the highest level of APR carried both genes. Sequence information for the critical DArT marker bPb-0837 (positioned at 21.2 cM on chromosome 5HS) was used to develop bPb-0837-PCR, a simple PCR-based marker for qRphFlag. The 245 bp fragment for bPb-0837-PCR was detected in a range of barley cultivars known to possess APR, which was consistent with previous tests of allelism, demonstrating that the qRphFlag resistant allele is common in leaf rust resistant cultivars derived from Vada and Emir. qRphFlag has been designated Rph20, the first gene conferring APR to P. hordei to be characterised in barley. The PCR marker will likely be effective in marker-assisted selection for Rph20.
Assuntos
Basidiomycota/patogenicidade , Mapeamento Cromossômico , Genes de Plantas , Hordeum/genética , Doenças das Plantas/genética , Austrália , Cromossomos de Plantas , Regulação da Expressão Gênica de Plantas , Genótipo , Hordeum/imunologia , Hordeum/microbiologia , Imunidade Inata , Fenótipo , Doenças das Plantas/imunologia , Doenças das Plantas/microbiologia , Imunidade Vegetal , Folhas de Planta/genética , Folhas de Planta/microbiologia , Locos de Características Quantitativas , UruguaiRESUMO
The aim of this study was to compare the immune responses to live Neospora caninum tachyzoites and N. caninum native antigens formulated with immune stimulating complexes matrix (ISCOM-matrix) in calves. Fifteen calves were used in this study: 3 were intravenously inoculated with 1 × 10(8) live tachyzoites (Group A), 3 were inoculated twice with N. caninum native antigens formulated with ISCOMs (Group B); 3 with N. caninum native antigens in phosphate-buffered saline (PBS) (Group C); 3 received ISCOM-matrix (ISCOMs without antigen) (Group D) and 3 were negative controls receiving PBS (Group E). The last four groups were inoculated subcutaneously. The specific total IgG and its subtypes were analyzed by an indirect enzyme-linked immunosorbent assays (ELISAs) and by Western blot. IFN-γ levels in plasma was quantified using a commercial kit. All calves were challenged intravenously with 1 × 10(8) live tachyzoites at week 11 after receiving the first dose. Parasitemia was assessed in plasma samples by semi-nested PCR. Neospora-specific antibodies were detected in animals from Groups A and B in the week 2 after inoculation. The ELISA OD values were higher in Group B compared with Group A from weeks 6 to 11 (P<0.05). Analysis of the subisotype specific antibodies in experimentally infected calves revealed a predominant IgG(2) response; however, a predominant IgG(1) response was observed in animals inoculated with N. caninum native antigens formulated with ISCOM-matrix. Control calves remained seronegative until challenge infection. The pattern of bands by Western blot was similar when testing sera from animals in Groups A and B. The levels of IFN-γ production after respective immunization schedules were similar between Groups A and B. Neospora-DNA was detected in plasma samples shortly after intravenous challenge in calves from all groups including those receiving the experimental vaccine formulation. The duration of the parasitemia was similar in all groups.
Assuntos
Antígenos de Protozoários/imunologia , Doenças dos Bovinos/imunologia , Coccidiose/veterinária , Neospora/imunologia , Animais , Anticorpos Antiprotozoários/biossíntese , Anticorpos Antiprotozoários/sangue , Antígenos de Protozoários/farmacologia , Western Blotting/veterinária , Bovinos , Doenças dos Bovinos/parasitologia , Coccidiose/imunologia , Coccidiose/parasitologia , DNA de Protozoário/genética , Ensaio de Imunoadsorção Enzimática/veterinária , ISCOMs/imunologia , Isotipos de Imunoglobulinas/imunologia , Interferon gama/biossíntese , Interferon gama/sangue , Interferon gama/imunologia , Neospora/genética , Neospora/patogenicidade , Parasitemia/genética , Reação em Cadeia da Polimerase/veterinária , Distribuição Aleatória , Fatores de Tempo , Vacinação/veterináriaRESUMO
Objetivos: Describir las características clínicas, socioeconómicas, y patológicas de nueve casos de lactantes que fallecieron horas después de administrárseles vacunas antipolio y DPT junto con anti Haemophilus influenzae b o asociada con antihepatitis B o BCG. Materiales y métodos: Revisión de la historia clínica, entrevista con el equipo de salud a cargo de la vacunación y con los padres del lactante fallecido. Revisión de los informes del protocolo de autopsia e informes de anatomía patológica y entrevista con los médicos legistas y patólogos. Evaluación de controlde calidad de las vacunas administradas. Realización de exámenes de inmunohistoquímica de tejidos pulmonarespara el diagnóstico de virus. Resultados: Entre agosto y diciembre de 2001 se notificaron en el Perú, nueve casos de fallecimiento de lactantes entre ocho horas y tres días después de la aplicación de vacunas DPT y antipolio. Después de la vacunación, los síntomas iniciaron entre 30 minutos a tres horas y la muerte se produjo entre ocho a 78 horas. Los síntomas más frecuentes fueron irritabilidad 8/9, llanto persistente 6/9, somnolencia 5/9, sangrado por nariz y boca5/9. Todos los casos procedieron de familias pobres o muy pobres. El control de calidad se corroboró que las vacunas cumplieron con los estándares establecidos por la OMS. Las causas de la muerte reportadas en las necropsias fueron neumonía en dos casos y edema pulmonar en cinco casos, los informes de anatomía patológica mostraron una neumonitis intersticial y meningitis linfocitaria. No se observaron efectos citopáticos virales en los tejidos pulmonares y los estudios toxicológicos fueron negativos. Conclusiones: No existe evidencia de una asociación causal entre los eventosfatales y la administración de las vacunas.
Objectives: To describe clinical, socio-economic, and pathological characteristics of nine infants who died hours after receiving anti-polio and DPT vaccines, together with anti-Haemophilus influenzae b or in association to anti-hepatitis B vaccine or BCG. Materials and methods: Review of the clinical record, interview with the healthcare team in charge of immunization, and with parents of the deceased infant. Review the autopsy and pathology reports, as well as an interview with pathologists and forensic physicians. Quality control assessment of vaccines used immunohistochemistry examinations for virus diagnosis. Results: Between August and December 2001, nine cases of infant death were reported in Peru, between 8 hours and 3 days after receiving DPT and anti-polio vaccines. After immunization, symptoms appeared from thirty minutes to three hours, and death occurred between 8 to 78 hours. Most frequently reported symptoms were: irritability (8/9), persistent weeping (6/9), somnolence (5/9), nose and mouth bleeding (5/9). All cases occurred in poor or very poor families. Quality control assessments corroborated that vaccines complied with standards set by the World Health Organization. Causes of death reported in autopsies were pneumonia in 2 cases and pulmonary edema in 5 cases; pathology reports indicated the presence of interstitial pneumonitis and lymphocyte meningitis. No viral cytopathic effects in pulmonary tissues were found, and toxicological studies were reported as negative. Conclusions: There is no evidence of a causal relationship between fatal events and vaccine administration.
Assuntos
Morte Súbita do Lactente , Vacina contra Difteria, Tétano e Coqueluche/efeitos adversos , PeruRESUMO
Objetivo: Presentar un caso de gonadoblasgotoma bilateral y su manejo en una niña portadora de Síndrome de Tumer con antígeno SRY positivo Material y métodos: Niña de 6 años con el Síndrome de Tumer en cuyo cariotipo se encuentra un mosaicismo 45 XI SRY, con antígeno SRY positivo por lo que realiza estudio para descartar o confirmar la presencia de Gonadoblastoma consistente en Biopsia por laparoscopia de ambas gónadas. Resultados: Se encontró al estudio anatomo-patológico Gonadoblastoma bilateral, realizándose posteriormente gonadectomia bilateral, cuya evolución fue favorable. El Gonadoblastoma es un raro tumor compuesto por una combinación de células germinales y cor- dones sexuales-estroma que afecta exclusivamente a pacientes con disgenesia gonadal, siendo mas frecuente en niñas y adultas jóvenes fenotipicamente femeninas, que usual- mente tienen signos de virilización. Su . cuencia en gónadas disgenéticas es estimado en un 30 por ciento. Conclusión: Se recomienda la gonadecto-mía profiláctica en los casos de pacientescon síndrome Tumer con antígeno SRY positivo.
Objectíve: To present a case of bilateral nadoblastoma and its management in a Tumer Síndrome girl with positive SRY antigen. Material and methods: A six-year-old girl who was diagnosed as Tumer Syndrome and her karyotype was 45 XI 46 XY, with positive antigen, then she was performed a 46 XY laparoscopic biopsy looking for gonadoblastoma. Results: We found histopathologic evidenences of bilateral Gonadoblastoma, and weperformed bilateral gonadectomy, and postoperative recovery was uneventful. Gonadoblastoma is an uncommon tumor which has germ cells, which affects to patients who were diagnosed as gonadal dysgenesis, it is more I frequent in children and young women phenotypically female, who used to have virilism signs. Its frequency in dysgenetic gonads is calculated in 30 percent. Conclusion: We suggest prophylactic gonadectomy in patients with Tumer Syndrome and evidence of y chromosome material.
Assuntos
Humanos , Feminino , Criança , Gonadoblastoma/cirurgia , Gonadoblastoma/complicações , Neoplasias Ovarianas/cirurgia , Neoplasias Ovarianas/complicações , Síndrome de Turner/complicações , Biópsia , Cromossomos Humanos X , Cromossomos Humanos Y , Gonadoblastoma/genética , Gonadoblastoma/patologia , Laparotomia , Mosaicismo , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/patologia , Síndrome de Turner/genética , Resultado do TratamentoRESUMO
INTRODUCTION: The cerebellum has been traditionally associated with motor control learning and performance. However, since 1970 a growing body of clinical and experimental evidences has suggested that the cerebellum may be involved in nonmotor cognitive functions as well. OBJECTIVE: To explore the presence of eventual cognitive impairment in non-demented patients with isolated degenerative cerebellar diseases. PATIENTS AND METHODS: Twelve patients with the diagnosis of selective degenerative cerebellar disorders, either inherited or sporadic, were selected (mean age: 40.42 +/- 13.49 years; mean education level: 9.92 +/- 3.99 years; duration of illness: 12.13 +/- 11.27 years, MMSE: 26.75 +/- 1.5) and evaluated through a standardized neuropsychological tests battery. Normalized Z scores were estimated and compared against 0, employing the t test for one sample. RESULTS: Significant cognitive deficits were found in the following domains: executive, visuo-spatial, memory and attention functions. Performance on the Wisconsin test showed a significative number of perseverative errors. Memory deficits included verbal learning and free recall difficulties, with good recognition of the material presented. CONCLUSIONS: The findings of this study are consistent with the role of the cerebellum as modulator of mental functions. The cognitive deficits resulting from cerebellar pathology may be related with the disruption of cerebello-cortical connexions involving a complex network which includes the prefrontal region, suggesting that the cerebellum may process cortical information coming from different areas linked with the control of cognition.
Assuntos
Doenças Cerebelares/fisiopatologia , Cerebelo/patologia , Testes Neuropsicológicos , Adolescente , Adulto , Cerebelo/fisiologia , Cognição/fisiologia , Transtornos Cognitivos/fisiopatologia , Feminino , Humanos , Masculino , Transtornos da Memória/fisiopatologia , Pessoa de Meia-IdadeRESUMO
In September 2003, leaves exhibiting spot-type lesions similar to those produced by Cochliobolus sativus Drechs. ex Dastur were widely observed in six commercial barley crops of cvs. Norteña Daymán, Norteña Carumbé, and MUSA 936 in Soriano and Río Negro provinces, the main barley production region in western Uruguay. Spot lesions were tan to dark brown, circular to elliptical, and 3 to 10 mm in diameter. Larger lesions were surrounded by a chlorotic margin of varying width. Affected leaf pieces (10 to 15) from each field were placed in a moist chamber for 2 days to promote sporulation. A fungus identified morphologically as Pyrenophora teres (Died.) Drechs. (1) was consistently isolated from infected leaves. However, symptoms did not correspond to the net-type lesions of net blotch commonly produced by P. teres f. sp. teres in Uruguay. Three monoconidial cultures were obtained by transferring single conidia to potato dextrose agar and then to 10% V8 juice agar and incubated at 20 to 22°C with a 12-h photoperiod for 10 days. Adding sterile water to each plate and gently rubbing the surface with a microscope slide prepared inoculum for pathogenicity tests. Conidia concentration was adjusted to 1 × 104 conidia per ml. Sixty-eight barley genotypes from Uruguay, ICARDA/CIMMYT, and North Dakota were grown in the greenhouse for 2 weeks at 20 to 22°C with a 14-h photoperiod. For each monoconidial isolate, three seedlings of each genotype were inoculated at the three-leaf stage 15 to 16 days after seeding with 0.4 ml of the inoculum suspension with an airbrush inoculator. A drop of Tween 20 was added per 40 ml of inoculum suspension. One set of each genotype was inoculated with sterile water as a control. Seedlings were placed in a dew chamber at 20°C and 100% relative humidity in the dark for 24 h and then returned to prior conditions. The first lesions developed after 7 to 9 days. Leaves two and three of the plants were visually rated for disease (3) 13 days after inoculation. Control plants were disease free. The most susceptible reactions were observed on cvs. Norteña Daymán, MUSA 936, and line CLE 230 (Uruguay). Symptoms were similar in shape and size to those observed in the fields. The most resistant infection types were observed on several Uruguayan and North Dakota advanced lines. The fungus was consistently reisolated from inoculated plants. On the basis of morphology and symptoms produced, the pathogen was identified (2) as P. teres. f. sp. maculata Smedeg. To our knowledge, this is the first report of this fungus causing spot-like symptoms of net blotch in Uruguay. References: (1) M. B. Ellis. Dematiaceous hyphomycetes, CABI, Oxon, UK, 1971. (2) V. Smedergaard-Petersen. Pages 124-144 in: R. Vet. Agr. Univ. Yearbook, Copenhagen, 1971. (3) A. Tekauz. Can. J. Plant Pathol.7:181, 1985.
RESUMO
Little attention has been paid in the literature to the state of the peripheral nervous system (PNS) in Alzheimer's disease (AD). We conducted a comprehensive electrophysiological study in 15 AD patients looking for functional abnormalities within their PNSs. A reduction of the number of functioning motor units (MU) was found in the thenar and soleus muscles of most of these patients without enlargement of the remaining MUs territories, while the motor and sensory conduction velocities of the peripheral nerves were preserved. These results suggest dysfunction of the spinal motoneurones in patients afflicted with this condition.
Assuntos
Doença de Alzheimer/fisiopatologia , Neurônios Motores , Músculo Esquelético/fisiopatologia , Condução Nervosa , Sistema Nervoso Periférico/fisiopatologia , Doença de Alzheimer/complicações , Eletrofisiologia , Feminino , Mãos , Humanos , Perna (Membro) , Masculino , Nervo Mediano/fisiopatologia , Pessoa de Meia-Idade , Doenças do Sistema Nervoso Periférico/etiologia , Nervo Fibular/fisiopatologiaRESUMO
Objetivo: El motivo del presente trabajo es confirmar la categoría de genodermatosis, con transmisión autosómica dominante, de los tricoepiteliomas múltiples, estudio que se lleva a cabo en este grupo familiar donde cuatro generaciones se encuentran afectados del mismo proceso. Materiales y método: Se estudiaron en el año 1990 cuatro pacientes, dos de sexo femenino y dos masculinos, comprendidos entre cinco y cuarenta y nueve años de edad, siendo la media etaria de veintiocho años. Los cuatro pacientes afectados de tricoepiteliomas múltiples pertenecían a una misma familia. El diagnóstico se fundamentó en la clínica y el estudio histopatológico. Se efectuó historia clínica detallando la afectación cutánea, el tipo de evolución, los antecedentes hereditarios y la terapéutica recibida. Conclusiones: Los cuatro casos considerados corresponden a tricoepiteliomas múltiples; su diagnóstico se estableció por la relación clínico-patológica. El aspecto clínico de la enfermedad y su histopatología son coincidentes con las descriptas por otros autores. A través del estudio de la enfermedad en cuatro generaciones se confirma el carácter de genodermatosis
Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Adolescente , Carcinoma/diagnóstico , Neoplasias Cutâneas/diagnóstico , Carcinoma Basocelular/diagnóstico , Carcinoma Basocelular/genética , Diagnóstico Diferencial , Neoplasias Cutâneas/genética , Neoplasias Cutâneas/patologiaRESUMO
Objetivo: El motivo del presente trabajo es confirmar la categoría de genodermatosis, con transmisión autosómica dominante, de los tricoepiteliomas múltiples, estudio que se lleva a cabo en este grupo familiar donde cuatro generaciones se encuentran afectados del mismo proceso. Materiales y método: Se estudiaron en el año 1990 cuatro pacientes, dos de sexo femenino y dos masculinos, comprendidos entre cinco y cuarenta y nueve años de edad, siendo la media etaria de veintiocho años. Los cuatro pacientes afectados de tricoepiteliomas múltiples pertenecían a una misma familia. El diagnóstico se fundamentó en la clínica y el estudio histopatológico. Se efectuó historia clínica detallando la afectación cutánea, el tipo de evolución, los antecedentes hereditarios y la terapéutica recibida. Conclusiones: Los cuatro casos considerados corresponden a tricoepiteliomas múltiples; su diagnóstico se estableció por la relación clínico-patológica. El aspecto clínico de la enfermedad y su histopatología son coincidentes con las descriptas por otros autores. A través del estudio de la enfermedad en cuatro generaciones se confirma el carácter de genodermatosis (AU)
Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Adolescente , Neoplasias Cutâneas/diagnóstico , Carcinoma/diagnóstico , Neoplasias Cutâneas/genética , Neoplasias Cutâneas/patologia , Diagnóstico Diferencial , Carcinoma Basocelular/diagnóstico , Carcinoma Basocelular/genéticaRESUMO
La Escala de Evaluación para Enfermedad de Alzheimer (ADAS) valora los dominios cognitivos más afectados por la enfermedad de Alzheimer (EA). Su fácil y rápida implementación hacen de ésta una de las escalas más utilizadas. Objetivo: Adaptación de ítems cognitivos, y su valoración de la reproductibilidad en el testeo seriado y de confiabilidad interexaminadores, en normal y EA. Método: La adaptación a nuestro idioma se valoró en 110 controles (edad: 59,06 + 8,90, educación 10,46 + 4,7, 42 por ciento varones, MMSE 29,3 + 0,7). Las palabras seleccionadas para las subescalas de memoria, fueron concretas y de alta frecuencia, como los objetos a nominar. Se estudió la sensibilidad y confiabilidad del testeo seriado comparando 20 pacientes con EA leve a moderada (GDS 3,35 + 1,1) y 22 controles apareados por edad y educación. Se evaluó la confiabilidad interexaminadores. Resultados: Los enfermos calificaron peor en escalas cognitiva y de memoria (p<.00001). El retest presentó alta correlación (Spearman = p<.001) en la mayoría de las variables de ambos grupos, excepto en órdenes y orientación en controles. Se descartó el efecto de aprendizaje. Se observó buena a sustancial concordancia interinvestigador (kappa.66 para subescala de memoria y .74 para subescala cognitiva). Conclusiones: Esta adaptación del ADAS es sensible y confiable. Si bien el Wilcoxon fue no significativo en ambos grupos, los valores de algunas variables del grupo control mostraron mejor rendimiento en el retesteo, por lo que debe considerarse el efecto de aprendizaje en estos (AU)
Assuntos
Estudo Comparativo , Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Doença de Alzheimer/diagnóstico , Testes Neuropsicológicos/estatística & dados numéricos , Testes Neuropsicológicos/normas , Reprodutibilidade dos Testes , Variações Dependentes do Observador , Estudos de Casos e Controles , Transtornos da Memória/diagnóstico , Transtornos Cognitivos/diagnóstico , Demência/diagnóstico , Escalas de Graduação Psiquiátrica/normasRESUMO
La Escala de Evaluación para Enfermedad de Alzheimer (ADAS) valora los dominios cognitivos más afectados por la enfermedad de Alzheimer (EA). Su fácil y rápida implementación hacen de ésta una de las escalas más utilizadas. Objetivo: Adaptación de ítems cognitivos, y su valoración de la reproductibilidad en el testeo seriado y de confiabilidad interexaminadores, en normal y EA. Método: La adaptación a nuestro idioma se valoró en 110 controles (edad: 59,06 + 8,90, educación 10,46 + 4,7, 42 por ciento varones, MMSE 29,3 + 0,7). Las palabras seleccionadas para las subescalas de memoria, fueron concretas y de alta frecuencia, como los objetos a nominar. Se estudió la sensibilidad y confiabilidad del testeo seriado comparando 20 pacientes con EA leve a moderada (GDS 3,35 + 1,1) y 22 controles apareados por edad y educación. Se evaluó la confiabilidad interexaminadores. Resultados: Los enfermos calificaron peor en escalas cognitiva y de memoria (p<.00001). El retest presentó alta correlación (Spearman = p<.001) en la mayoría de las variables de ambos grupos, excepto en órdenes y orientación en controles. Se descartó el efecto de aprendizaje. Se observó buena a sustancial concordancia interinvestigador (kappa.66 para subescala de memoria y .74 para subescala cognitiva). Conclusiones: Esta adaptación del ADAS es sensible y confiable. Si bien el Wilcoxon fue no significativo en ambos grupos, los valores de algunas variables del grupo control mostraron mejor rendimiento en el retesteo, por lo que debe considerarse el efecto de aprendizaje en estos
Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Doença de Alzheimer/diagnóstico , Testes Neuropsicológicos/estatística & dados numéricos , Estudos de Casos e Controles , Variações Dependentes do Observador , Reprodutibilidade dos Testes , Transtornos Cognitivos/diagnóstico , Demência/diagnóstico , Transtornos da Memória/diagnóstico , Escalas de Graduação Psiquiátrica/normas , Testes Neuropsicológicos/normasRESUMO
UNLABELLED: We proposed to investigate subclinical cognitive impairment secondary to chronic Chagas' disease (CCD). No similar study was previously done. The neuropsychological performance of 45 chronic Chagasic patients and 26 matched controls (age, education place and years of residency in endemic area) was compared using the Mini Mental State Exam (MMSE), Weschler Memory Scale (WMS) and the Weschler Adult Intelligent Scale (WAIS). Non-parametric tests and Chi2 were used to compare group means and multivariate statistics in two way frequency tables for measures of independence and association of categorical variables with the disease. RESULTS: Chagasic patients showed lower MMSE scores (p < .004), poor orientation (p < .004), and attention (p < .007). Lower WMS MQ were associated with CCD (Chi2 5.9; p < .01; Fisher test p < .02). Lower WAIS IQ were associated with CCD (Chi2 6.3, p < .01; Fisher test p < .01) being the digit symbol (p < .03), picture completion (p < .03), picture arrangement (p < .01) and object assembly (p < .03) subtests the most affected. The impairment in non-verbal reasoning, speed of information processing, problem solving, learning and sequencing observed in chronic Chagas disease patients resembles the cognitive dysfunction associated with white matter disease.