Banca de DEFESA: TAÍS REGINA MICHAELSEN
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.DISCENTE : TAÍS REGINA MICHAELSEN
DATA : 26/07/2019
HORA: 14:00
LOCAL: Sala de Reuniões Embrapa Suínos e Aves - Concórdia-SC.
TÍTULO:
Effects of formaldehyde-based formulations on the reduction of Salmonella in
feed and its impact on the performance of pigs during nursery phase
PALAVRAS-CHAVES:
Control, seroprevalence, excretion, diet, chemicals.
PÁGINAS: 45
GRANDE ÁREA: Ciências Agrárias
ÁREA: Medicina Veterinária
RESUMO:
Salmonellosis is one of the most common food-borne diseases in humans, and among animal foods, pork is the third source of contamination. Several factors are related to the dissemination of Salmonella in the farms, among them the ration plays an important role. The feed mills produce large quantities of feed, which supply many farms. Therefore, a contaminated litter has a potential impact of distributing contamination on a lot of properties. Once infected, pigs excrete high concentrations of the agent through feces contaminating the environment and batch mates. In this context, the proposal of the study is to contribute to the control of Salmonella by means of the inclusion of products based on formaldehyde in the diet of pigs in nursery phase. The study was carried out in two stages. In the first of these four different commercial formulas, based on formaldehyde and blends of organic acids had their effectiveness tested against artificial contamination by Salmonella Senftenberg. The product composed of 30% of formaldehyde and 5% of organic acids was the one that presented the best performance, obtained a reduction of 3 log10 and was selected for inclusion diet of piglets in different concentrations 0% (control), 1%, 2% and 3%. What comprehend the second stage of the test. In this study, 336 male pigs of the same genetic strain, with a mean age of 21 days and a mean weight of 6.2 kg, were distributed in 28 pens through a randomized complete block design. For each treatment, 7 replicates were performed with 12 piglets per pen. The commercial liquid product was applied to the feed by liquid spraying. For data collection the animals and the leftover rations were weighed on the day of lodging and at each feeding phase change, 8, 17, 27 and 42 days of lodging. On these occasions, weight gain, daily weight gain, feed intake and feed conversion of pigs were evaluated. Statistical differences (p <0.005) were observed between groups, and the control group presented better zootechnical indexes when compared to the groups that consumed rations treated with different concentrations of formaldehyde. Thus, in spite of the significant control of Salmoenllain the diet, the inclusion of 1% to 3% formaldehyde in the diet of pigs in nursery phase compromises its performance. And so, strategies for controlling foodborne pathogens need to take into account their negative impacts on animal performance.
MEMBROS DA BANCA:
Presidente - 564.081.370-91 - JALUSA DEON KICH - EMBRAPA
Interna - 2277465 - FABIANA MOREIRA
Externa à Instituição - SABRINA CASTILHO DUARTE
Externo à Instituição - Diego Surek