Este trabalho teve como objetivo avaliar, no território do semiárido baiano, a presença do Lentivirus de pequenos ruminantes (SRLV: Artrite encefalite caprina, CAEV, e Maedi-Visna, MVV) e caracterizar o perfil socioeconômico da caprino/ovinocultura nessa região. Em 134 propriedades do Portal do Sertão, Sisal e Bacia do Jacuípe foram coletadas amostras de soros de caprinos (n=1046) e ovinos (n = 704), para detecção de anticorpos para CAEV e MVV pelo teste de Imunodifusão (IDGA) e ELISA e Western Blot para CAEV. Durante a visita em cada fazenda, aplicou-se um questionário para definir o perfil socioeconômico da caprino/ovinocultura da propriedade. Os resultados mostraram a ausência de soropositivos para MVV e CAEV pelo IDGA, mas 5/755 caprinos foram positivos para CAEV pelo ELISA e confirmados no Western blot. O questionário aplicado mostrou um perfil produtivo pouco tecnificado, com predomínio de propriedades de gestão familiar, sem investimentos tecnológicos, rebanhos de ovinos e caprinos sem raça definida, criados em sistema extensivo e destinados principalmente à subsistência familiar. Concluindo, este trabalho mostra que a região do semiárido baiano tem uma baixa ocorrência do SRLV, e o desenvolvimento da caprino/ovinocultura é voltado à criação de animais para consumo familiar ou obtenção de renda nos mercados locais. PALAVRAS-CHAVE: diagnóstico; Lentivirus de pequenos ruminantes; produtividade; semiárido.
Our data raises questions about the role of equids in the chain of VACV epidemiology. The surveillance of equids in VACV-affected areas worldwide is relevant.
As the number of Internet of Things (IoT) devices already grows faster than the population, the need for strong authentication and access control mechanisms is greater than ever. Legacy authentication schemes are usually computationally expensive which makes them unsuitable for resource-constrained IoT devices. On the other hand, solutions that target such devices typically base their access control mechanism solely on authentication. In a complex smart environment, however, IoT devices often offer and consume a range of resources, which demands a fine-grained access control mechanism. Besides, the IoT paradigm also beckons safe interoperability among devices that belong to different smart environments. Last, there is a lack of options for authentication and access control solutions that cover the entire IoT device life-cycle, i.e., from device manufacturing to decommissioning. In this work, we propose Authentication of Things (AoT), a holistic authentication and fine-grained access control solution for the entire IoT device life-cycle. AoT comprises a suite of protocols which relies on Identity-Based Cryptogra phy (IBC) to distribute keys and authenticate devices as well as Attribute-Based Cryptography (ABC) to cryptographically enforce a fine-grained Attribute-Based Access Control (ABAC). We evaluate an AoT prototype at different security levels implemented on a variety of platforms, representing a wide range of IoT devices, from smartphones to microcontrollers. Our results indicate that AoT performance ranges from affordable on resource-constrained devices to highly efficient on powerful devices.
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