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      Caracterización de la paratuberculosis bovina en ganado doble propósito de los llanos de Monagas, Venezuela Translated title: Characterization of bovine paratuberculosis in dual purpose cattle at the plains of Monagas state, Venezuela

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          Abstract

          Para caracterizar la situación de la paratuberculosis bovina o enfermedad de Johne en ganado doble propósito de los llanos de Monagas, se determinó la prevalencia de esta enfermedad utilizando dos técnicas de diagnóstico, la prueba intradérmica o Johnina para inmunidad celular y serología ELISA para inmunidad humoral. Se seleccionaron ocho sistemas de producción ubicados en los Municipios Ezequiel Zamora y Maturín en diferentes zonas agroecológicas, llanos altos y llanos bajos respectivamente. El tamaño de la muestra animal se calculó sobre la base de la técnica de muestreo para estudios de prevalencia (OPS-OMS, 1973), en cada finca se evaluaron 30 animales adultos con ambas pruebas. El análisis de los datos se efectuó mediante la prueba de Z, para la comparación de proporciones o prevalencia entre fincas y factores asociados a la enfermedad. Los resultados obtenidos muestran diferencias significativas (P<0,05) en relación con la prevalencia de la enfermedad, de acuerdo al método de diagnóstico utilizado 4,16% y 72,1% Johnina y ELISA, respectivamente. Asimismo, se observaron diferencias altamente significativas (P<0,001) entre zonas agroecológicas 61,7% llanos altos y 82,5% llanos bajos, condiciones de manejo sistema abierto 69,9% en comparación con sistema cerrado 77,3% (P<0,05) y buen sistema de drenaje 67,4 % en contraste con mal drenaje 76,7% (P<0,10). En virtud de las pérdidas económicas, de su efecto sobre la productividad de las explotaciones y su posible condición de zoonosis, es importante considerar la presencia de esta patología en Monagas para diseñar estrategias de control fundamentadas en el diagnóstico de laboratorio y las  condiciones particulares de los sistemas de producción.

          Translated abstract

          To characterize the situation of the bovine Paratuberculosis or Johne’s disease in dual purpose cattle in the Monagas plains, the prevalence of this disease was determined using two diagnostic techniques: the skin test (Johnina) for cellular immunity and a serological ELISA test for humoral immunity. There were selected eight production systems, located in the Municipality Ezequiel Zamora and in Maturín, in two different agro ecological zones: high plains and low plains, respectively. The animal sample size was calculated by means of the sample technique for prevalence studies (OPS-OMS, 1973); so 30 mature animals for each farm were evaluated. The analysis of the data was made by using the Z-test to compare the proportions of prevalence among farms, and factors associated to the disease. The results showed significant differences (P<0.05) in relation to the disease prevalence. According to the method of diagnostic used, these values were: 4.16% and 72.1% for Johnina and ELISA tests, respectively. Also, there was observed highly significant differences (P<0.001) between agro ecologic zones: 61.7% and 82.25 for high plains and low plains, respectively. Regarding to the management conditions in the farms, the results were (P<0.05): 69.9 and 77.3% for the open and closed system, respectively. When draining condition of the farms was considered, there was observed differences (P<0.10) between the well 67.0% and bad drained 76.7% status. Due to the economic losses, its effect on the farms productivity and some risks of a potential zoonosis, it was concluded, based on the laboratory diagnosis, that is important to consider the presence of this pathology in Monagas, so some strategies for controlling this disease could be applied under each particular condition of the production system.

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          Most cited references20

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          Bioestadística. Base para el análisis de las ciencias de la salud

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            Mycobacterium paratuberculosis: a potential food-borne pathogen?

            M Collins (1997)
            Mycobacterium paratuberculosis commonly infects dairy cattle, leading to Johne's disease, which is also known as paratuberculosis. The infection is chronic progressive, and incurable. As the infection progresses, excretion of M. paratuberculosis in feces and milk occurs, and the bacterium spreads through the blood to multiple internal organs. Consequently, raw products originating from cattle may harbor M. paratuberculosis. Thermal treatments, such as pasteurization, are commonly relied on to kill food-borne bacterial pathogens that can infect humans. The small number of studies conducted to determine the thermal resistance of M. paratuberculosis suggest that it is less susceptible to destruction by heat killing than are milkborne zoonotic bacterial pathogens such as Listeria spp. or Mycobacterium bovis. Published reports concerning the thermal resistance of M. paratuberculosis in milk are reviewed herein, and key issues concerning the efficacy of pasteurization for elimination of M. paratuberculosis from milk are summarized.
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              Paratuberculosis: A Potential Zoonosis?

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                Author and article information

                Journal
                zt
                Zootecnia Tropical
                Zootecnia Trop.
                Instituto Nacional de Investigaciones Agricolas INIA, Maracay, Venezuela. (Maracay, Aragua, Venezuela )
                0798-7269
                September 2006
                : 24
                : 3
                : 321-332
                Affiliations
                [02] Maracay orgnameCENIAP orgdiv1Unidad de Laboratorios de Sanidad Animal.
                [01] orgnameInstituto de Investigaciones Agrícolas del Estado Monagas alfavera@ 123456cantv.net
                [03] Maracay orgnameCENIAP
                Article
                S0798-72692006000300010 S0798-7269(06)02400310
                6fe0082e-798e-4925-9137-ddecdbc0d5e4

                http://creativecommons.org/licenses/by/4.0/

                History
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 19, Pages: 12
                Product

                SciELO Venezuela

                Categories
                Artículos Científicos

                prevalence,prevalencia,diagnóstico,ganado doble propósito,Monagas,Paratuberculosis,diagnostic,double purpose cattle,Paratuberculosis bovina

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