The resistance of coffee plants to Meloidogyne exigua is conferred by the gene Mex-1. However, the mechanisms of resistance still need to be clarified. Therefore, the penetration, development and reproduction of two populations of M. exigua (M1, isolated from the coffee plant and M2, from rubber tree) in susceptible (Coffea arabica 'Catuai') and resistant (C. canephora 'Apoatã') cultivars were studied. A greater quantity of J2 from M1 penetrated the susceptible cultivar, but there was no difference between the cultivars for M2. Although the resistant coffee cultivar formed some galls, the nematode did not reproduce. M2 did not induce the formation of galls or the production of eggs in either cultivars. Events related to hypersensitive reaction (HR) were observed as well as other defense responses of the coffee cultivar against M. exigua, which inhibited the formation of the feeding site, provoked emigration of the J2 and delayed or inhibited development and reproduction. The response of the non-host plant was more effective, because it did not allow development of the nematode or, consequently, its reproduction. It was concluded that the coffee cultivar's resistance to M. exigua is not restricted to HR, but rather to a set of defense responses, both constitutive and induced, expressed after nematode penetration, especially phenolic-like compounds.
Four-coordinate distorted tetrahedral bis(2-iminopyrrolyl)cobalt(ii) complexes behave as Single-Ion Magnets (SIMs) in the absence of an external magnetic field.
A new homoleptic Co(II) complex bearing two highly sterically congested 2-formiminopyrrolyl N,N’-chelating ligands is reported, displaying slow relaxation of the magnetisation at zero static (DC) field. This compound shows large...
ResumoO complexo teníase-cisticercose é uma zoonose de grande importância para a saúde pública e animal. O ser humano desempenha importante papel sendo o único hospedeiro definitivo do parasita. Albergando no intestino as formas adultas da Taenia saginata ou da Taenia solium, cabendo à forma larvar (cisticerco) o desenvolvimento na musculatura de bovinos e suínos ou do próprio homem, quando este também atua como hospedeiro intermediário. Visando obter maior conhecimento sobre esta zoonose, o objetivo do presente estudo foi determinar o perfil epidemiológico do complexo teníase-cisticercose na zona rural do município de Matias Barbosa, localizado na Zona da Mata de Minas Gerais. Para tanto, foram realizadas coletas de sangue de 350 bovinos e 81 suínos e amostras de fezes de 124 pessoas da população presente em 74 propriedades rurais. Além disso, foi aplicado um questionário epidemiológico sobre as condições sócio-econômicas e sanitárias de cada propriedade. Observou-se uma prevalência de 0,9% de bovinos positivos ao teste de Immunoblot. Não houve suínos positivos, assim como também não foi diagnosticada pessoa portadora de teníase. Alguns fatores de risco de transmissão do complexo teníase-cisticercose no município foram identificados como o consumo de carne bovina e suína mal aquecida, propriedades sem saneamento básico e criação de bovinos com acesso a fontes de contaminação. Apesar da baixa prevalência da cisticercose bovina encontrada no município de Matias Barbosa, é necessária a tomada de medidas de controle do complexo teníase-cisticercose para impedir que haja aumento de casos da doença no município, tendo em vista que foram registrados fatores favoráveis à sua manutenção. Palavras-chave: Imunodiagnóstico, prevalência, fatores de risco, teníase-cisticercose, zoonose AbstractThe taeniosis-cysticercosis complex is an important disease to the public and animal health. The man plays an important role in the life cycle, because he is the unique definitive host. The adult forms of the Taenia solium or Taenia saginata holds in gut, and the larvae forms develops in the muscle of bovine and swine, respectively. The objective of this study was to determine the prevalence and risk factors of the taeniosis-cysticercosis complex transmission in rural area of Matias Barbosa -MG, Brazil. Catla and swine lood and human stool samples were collected from 74 farms. Cysticercosis were eníasis were diagnosis serological methods and the teniasis by direct microscopy. Moreover, a questionnaire was
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