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Circovírus tipo 2 : estudo vacinal comparativo

Authors: Vieira, João Nuno Amaro de Oliveira;

Circovírus tipo 2 : estudo vacinal comparativo

Abstract

O Circovírus porcino tipo 2 (PCV2), é um dos mais importantes agentes patogénicos emergentes que afecta a criação suína a nível mundial. A infeção por este vírus está associada a doenças, destacando-se a Post-weaning Multisystemic Wasting Syndrome (PMWS). Esta a mais habitual e a que provoca mais perdas económicas. A prevenção passa pelas medidas de biossegurança e vacinação, factor muito importante para conferir uma protecção elevada contra o PCV2. Este trabalho foi realizado na empresa Raporal S.A., em duas explorações de suinicultura. O estudo realizado incidiu sobre a comparação de duas vacinas (de laboratórios diferentes), cada uma administrada a um grupo distinto de 750 leitões após o desmame. Os objectivos incluíram a verificação da existência de diferenças entre os dois grupos de suínos relativamente aos parâmetros zootécnicos e imunológicos. Avaliou-se também a existência de doenças oportunistas e a existência de lesões em pulmões e corações após o abate. Os índices produtivos dos animais revelaram-se muito homogéneos nos dois grupos. No despiste de antigénios e anticorpos dos agentes PCV2 e porcine reproductive and respiratory syndrome vírus, verificou-se que ambos os grupos estavam com os valores dentro da normalidade, não apresentando sinais de doença. Na avaliação dos pulmões e corações para verificação da existência de lesões características de agentes patogénicos secundários, foi possível determinar que os animais não apresentavam lesões, com índices muito baixos de lesão em todas as avaliações. Palavras-chave: PCV2, suínos, ensaio experimental, vacinação, índices zootécnicos

Porcine Circovirus Type 2 (PCV2) is one of the most important emerging pathogens affecting swine farming worldwide. Infection with this virus is associated with the Post-weaning Multisystemic Wasting Syndrome (PMWS). This is the most common and the one that causes the most economic losses. In addition to biosafety measures, vaccination is a very important factor in giving animals high protection against PCV2. This work was carried out at Raporal S.A., in two swine farms. The study focused on the comparison of two vaccines (from different laboratories), each administered to a distinct group of 750 piglets after weaning. The objectives included verifying the existence of differences between the two groups of pigs in relation to zootechnical and immunological parameters. The existence of opportunistic diseases and the existence of lesions in lungs and hearts were also evaluated. The productive indexes of the animals proved to be very homogeneous in both groups. While screening for PCV2 and reproductive porcine and respiratory syndrome virus agents, it was found that both groups had the values within the normal range, showing no signs of disease. In the lung and heart assessment to verify the existence of characteristic lesions of secondary pathogens, it was possible to determine that the animals had good lung health, with very low value lesions in all evaluations. Keywords: PCV2, pigs, experimental trial, vaccination, zootechnical indices

Country
Portugal
Related Organizations
Keywords

MEDICINA VETERINÁRIA, SUÍNOS, VETERINARY MEDICINE, ZOOTECHNICS, VETERINÁRIA, VACCINATION, VACINAÇÃO, SWINE, ZOOTECNIA, Mestrado Integrado em Medicina Veterinária, MESTRADO INTEGRADO EM MEDICINA VETERINÁRIA

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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