Resumo

LOPEZ, Nancy et al. Contribución al Conocimiento de una Patología (Síndrome Parapléjico Bovino) de  la Ganadería Extensiva de los Llanos de Venezuela. Parte II: Estudio Etiopatogénico y Estrategias de Control. Rev. Fac. Cienc. Vet. [online]. 2006, vol.47, n.2, pp.91-105. ISSN 0258-6576.

In Venezuelan plains have about 12 millions Ha, were settled the productions systems known as cow-calf and breeding-raising, with acids soils and most of their pasture belongs to the genus Trachypogon, Axonopus and Andropogon. It keeps about 8 millions of crossbred heads (zebu x criollo); the environmental conditions and management are inadequate, for livestock raising; because of the lack of technological innovations to improve the efficiency of the productions system. The origin of the Paraplegic Syndrome (BPS) may be related to the adverse environmental conditions. An integral research model, that involve: applied, basic and operative researches, was fulfilled by a multidisciplinary and inter-institutional teamwork in order to apply a set of strategies in a minimum technologies package (MTP) by the producers in the affected farms to investigate and eradicate this trouble, knowing the nutritional situation and the integral management, which was corrected in accordance with the detecteddeficiency. A systematic follow up of the results was practiced to know the progress in the control of BPS and to evaluate the positive effect of the MTP on the most important bioproductive indicators in the herd: age of first birth, pregnancy rate, birth rate, and mortality rate. Therefore, etiopatogenic studies based on submicroscopy and histochemical analysis of the muscular fiber from ill and health animals were performed. The results showed: 1. BPS is a condition of multifactorial origin and closely associated to mineral deficiencies, especially in phosphorus. 2. Improve of technological pattern with MTP in the Venezuelan production system increasing  in its efficiency and eradication of the BPS.

Palavras-chave : Cattle; multipurpose breeds; paralysis; etiology; pathogenesis; disease control; mineral deficiencies; soil pH.