|540-3||EVALUATION OF THE EFFECT OF FUNCTIONAL FOODS ON ZOOTECHICAL PERFORMANCE OF BROILER CHICKENS EXPERIMENTALLY INFECTED WITH Salmonella enterica sorovar Pullorum|
|Autores:||Marcelo Ribeiro de Almeida Guedes (UGB - CENTRO UNIVERSITÁRIO GERALDO DI BIASE / AEDB - ASSOCIAÇÃO EDUCACIONAL DOM BOSCO) ; Renato da Silva Teixeira (UGB - CENTRO UNIVERSITÁRIO GERALDO DI BIASE) ; Moysés Estevão de Souza Freitas Cantilho (EEL/USP - ESCOLA DE ENGENHARIA DE LORENA - UNIVERSIDADE DE SÃO PAULO) ; Carlos Alberto Sanches Pereira (UGB - CENTRO UNIVERSITÁRIO GERALDO DI BIASE / AEDB - ASSOCIAÇÃO EDUCACIONAL DOM BOSCO) |
Brazilian poultry industry has been growing throughout the years in a substantial manner. Brazil is currently between the world’s top five broiler chicken producers. This productivity is due to the use of several additives in the manufacture of broiler chickens’ feed. The pursuit for alternatives which maintain high productivity without the sacrifice of economic viability has motivated several studies. Therefore, the present work aimed to study the effect of functional foods (a multi-strain probiotic preparation containing four Lactobacillus strains; a prebiotic preparation containing fructooligosaccharides and inulin; and a synbiotic preparation) on broiler chickens experimentally infected with Salmonella enterica sorovar Pullorum. For this, 72 chicks with one day of age were distributed in 9 groups of 8 animals each, and subjected to different treatments. Groups 1, 2, 3 and 4 were labeled as negative controls for no treatment, probiotics, prebiotics and synbiotics, respectively. Groups 2, 3 and 4 received a daily 1 ml dose of the corresponding functional feed. On the other hand, groups 6, 8 and 9 received treatment for 7 days prior to infection; group 5 received no treatment and was infected on the first day, acting as a positive control for salmonellosis. Groups 6, 8 and 9 received treatment with probiotics, prebiotics and synbiotics (daily dose of 1 ml), respectively. Group 7 was infected on the first day and began receiving the same daily dose of probiotics 24 hours later. Mortality, weight gain and feed intake were evaluated as zootechnical parameters, which also permitted the estimation of food conversion rates. A significant increase (p<0,01) regarding food conversion was observed in groups 2, 3 and 4 in comparison to group 5. The animals in groups 5 and 7, in addition to lower food conversion rates presented high mortality rates on the first week. The animals in groups 6, 8 and 9 did not die from salmonellosis and did not present lower food conversion rates. These results indicate that the probiotic, prebiotic and synbiotic preparations improved significantly the food conversion. The preparations also acted as effective prophylactic measures to prevent salmonellosis, but did not act effectively as therapeutic agents.
Palavras-chave: Probiotics, Prebiotics, Synbiotics, Salmonellosis, Fructans