El objetivo del presente trabajo fue comparar el rendimiento productivo de pollos de carne criados con una ración conteniendo el anticoccidial natural sapogeninas esteroidales (500 ppm) con el de otro grupo de pollos alimentados con la misma ración pero con el anticoccidial ionóforo salinomicina (60 ppm), con desafío natural de coccidia. Se criaron 800 pollos de la línea Ross 308, divididos en dos grupos de 400 animales para cada droga, cada grupo se dividió en 5 repeticiones de 80 animales cada una. Semanalmente se evaluaron los parámetros productivos, y desde de la tercera semana se hizo necropsia a 10 aves al azar para evaluar lesiones macroscópicas y presencia de ooquistes al raspado de mucosa intestinal, se muestreó la cama para recuento de ooquistes, y al día 42 se evaluó la pigmentación de patas. Los parámetros productivos fueron: consumo de alimento total: 1524,57 y 1478,5 kg., peso corporal final: 2,480 y 2,413 kg., índice de conversión alimenticia: 1,64 y 1,63, mortalidad: 2,5 y 1 %, para sapogeninas esteroidales (SE) y salinomicina, respectivamente. Todos los valores sin diferencia estadística significativa (P<0.05). Se notó una depresión en el consumo de alimento en el grupo tratado con salinomicina hasta la quinta semana, en que se retiró la droga. No hubo lesiones macroscópicas y la presencia de ooquistes al raspado de mucosa fue mayor en el intestino anterior en ambos grupos. Los recuentos de ooquistes en cama mostraron la curva ascendente típica y no hubo diferencia estadística significativa (P<0.05). La pigmentación de patas de cada grupo fue de 4,88 y 4,73 para SE y salinomicina, los coeficientes de variación fueron de 22,33 y 15,49, para sapogeninas y salinomicina, respectivamente. Se concluye que las SE son similares a salinomicina en parámetros productivos, control de lesiones y recuento de ooquistes en cama / The objective of this trial was to evaluate the productive performance of broiler chickens comparing two different anticoccidial drugs. Eight hundred chickens Ross 308 were randomly selected, and then divided in two groups of 400 animals each one. One group received Steroidal sapogenins (500 ppm) in food, and the other was supplemented with anticoccidial ionophorus salinomicin (60 ppm). Those groups were at once divided in 5 subgroups of 80 birds each one. Chickens were then challenge with natural challenge of coccidia. The productive parameters were evaluated weekly. Since the third week up to sixth week, 10 birds were randomly chosen and killed for post-mortem examination. Evaluation of intestinal macroscopic lesions and presence of oocysts in intestinal mucosa scrapping were also performed. The shank pigmentation was furthermore evaluated at 42 day. The productive parameters for both groups were: feed intake 1524,57 Kg and 1478,5 Kg., final body weight 2,480 Kg and 2,413 Kg., food conversion 1,64 and 1,63, and mortality 2,5 and 1 % for steroidal sapogenins (SS) and salinomicyn, respectively. Not statistically significant difference was found between those groups. A reduction in food intake in the group treated with salinomicin was noted when the drug was retired (fifth week). There were not macroscopic lesions, and the number of oocysts intestinal scrapping was greater in the duodenum in both groups. Although the counts of oocysts showed an upward trend, there was no statically difference between the two groups. The shank pigmentation index was 4,88 and 4.73 for SE and salinomicin, respectively. The variation coefficients were 22,33 and 15,39, for the groups treated with steroidal sapogenins and salinomicyn, respectively. We conclude that the effect of SE and salinomicin is similar regarding to productive parameters, intestinal lesions, and number of oocysts in this trial.
| Identifer | oai:union.ndltd.org:Cybertesis/sdx:www.cybertesis.edu.pe:80:sisbib/documents/sisbib.2002.condemarin_ba-principal |
| Date | January 2002 |
| Creators | Condemarín Bramón, Alfredo |
| Publisher | Universidad Nacional Mayor de San Marcos. Programa Cybertesis PERÚ |
| Source Sets | Universidad Nacional Mayor de San Marcos - SISBIB PERU |
| Language | Spanish |
| Detected Language | Spanish |
| Format | text/xml |
| Rights | Condemarín Bramón, Alfredo, acondemarin@yahoo.com |
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