2009
DOI: 10.4322/rbpv.01804009
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Abstract: ResumoO experimento foi realizado com o objetivo de investigar a dinâmica da infecção por nematódeos gastrintestinais em vacas no periparto. Utilizaram-se 106 vacas de corte, divididas em dois grupos: o grupo 1 (G1), constituído por 42 vacas de primeira e segunda cria; e o grupo 2, (G2) por 76 vacas de terceira cria ou mais. A partir dos 120 dias do pré-parto até os 90 dias pós-parto, coletaram-se fezes para contagens de ovos por grama de fezes (OPG) e sangue para determinação do volume globular e hemoglobina … Show more

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Cited by 5 publications
(10 citation statements)
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“…The finding that the animals presented higher EPG counts at their first lactation corroborates the results of Gennari et al (2002), who found greater resistance in cows subjected to successive infections, with consequent decreases in EPG counts. Viana et al (2009) did not observe any difference in average EPG counts when comparing beef cows with one or two lactations and beef cows with three or more lactations.…”
Section: Discussionmentioning
confidence: 54%
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“…The finding that the animals presented higher EPG counts at their first lactation corroborates the results of Gennari et al (2002), who found greater resistance in cows subjected to successive infections, with consequent decreases in EPG counts. Viana et al (2009) did not observe any difference in average EPG counts when comparing beef cows with one or two lactations and beef cows with three or more lactations.…”
Section: Discussionmentioning
confidence: 54%
“…Gennari et al (2002) observed an increase in EPG counts due to calving among Holstein cows, but the average EPG counts were lower than those found in the present study. Increased EPG counts were also observed by Viana et al (2009) among beef cows at the time of calving. In a study on the seasonal fluctuation of gastrointestinal nematodes in sheep, Taylor (1935) observed that the peripartum phenomenon contributed significantly towards increased EPG counts, thus overcoming the risk factor of season.…”
Section: Discussionmentioning
confidence: 88%
“…Además, el período de rotación debe ser mayor que el ciclo de vida de los parásitos, lo que permite la inactivación de los huevos y las larvas, y una reducción consecuente de la tasa de infección por las L3 (29) . Otra estrategia usada por el 68.5 % de los ganaderos en el presente estudio es la separación de los animales por edad, lo cual es crucial, ya que los animales jóvenes son más susceptibles a la infección por parásitos que los adultos (5) .…”
Section: Discusión Caracterización De Los Sistemas De Cría Y Los Animunclassified
“…Esta práctica es especialmente relevante para las vaquillas en desarrollo, ya que tienen comprometido su sistema inmune, haciéndolas más susceptibles a endoparásitos en el pre-y post-parto. Las vacas Cebú con múltiples partos no requieren de la desparasitación, y han mostrado tener una resistencia natural a los NG y una baja potencial de contaminación cuando se maneja apropiadamente (5,41) . Se deben promover cambios en las estrategias de control de los NG (38) , para que incluya categorías de edad, que sigue los criterios climáticos y regionales, y que consideren el perfil de las poblaciones resistentes de los NG (37) .…”
Section: Control De La Helmintiasisunclassified
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