RESUMO: Oitocentas e sessenta frangas Embrapa 051 foram alocadas em três grupos de peso corporal às 19 semanas (pesadas: 1,48 kg ± 0,01 DP, N= 172 aves, médias: 1,32 kg ± 0,039 DP, N= 516 aves, leves: 1,19 kg ± 0,019 DP, N=172 aves) e alojadas em piso com ninhos por 65 semanas. As aves pesadas apresentaram maior produção de ovos nas semanas 24-28, enquanto as médias superaram as pesadas nas semanas 41-46, e as leves superaram as pesadas nas semanas 61-65. Nas semanas 57 a 65, não houve diferenças significativas na produção de ovos entre as aves pesadas e médias. O peso às 19 semanas afetou ovos no chão, ovos trincados e ovos duplos (P < 0,05) nas semanas 22-34. As aves pesadas botaram menos ovos no chão, as médias tiveram menos ovos trincados (0,3%), e as leves produziram menos ovos com duas gemas (1,1%). Não houve impacto significativo do peso inicial no peso dos ovos. Em conclusão, o peso às 19 semanas influencia o ciclo de postura, com aves pesadas, médias e leves exibindo padrões distintos de produção de ovos, uso do ninho e características de qualidade em diferentes fases do ciclo. RESUMO 05 1 (pesadas 148 48 1,4 001 0 01 0,0 DP N 17 132 32 1,3 0039 039 0,03 51 119 1,1 0019 019 N172 N=17 6 2428, 2428 24 28, 28 24-28 4146, 4146 41 46, 46 41-46 6165. 6165 61 65. 61-65 5 chão P 0,05 005 2234. 2234 22 34. 34 22-34 0,3%, 03 0,3% , 3 (0,3%) 1,1%. 11 1,1% . (1,1%) conclusão postura 14 4 1, 00 0, 13 003 N17 N=1 242 2 24-2 414 41-4 616 61-6 223 22-3 0,3 (0,3% (1,1% N1 24- 41- 61- 22- (0,3 (1,1 (0, (1, (0 (1 (

ABSTRACT: A total of 860 Embrapa 051 pullets were allocated into three groups based on their 19-week body weights (heavy: 1.48 kg ± 0.01 SD, N= 172 birds, medium: 1.32 kg ± 0.039 SD, N= 516 birds, light: 1.19 kg ± 0.019 SD, N=172 birds) and housed in floor pens with nests for a 65-week production period. Heavy-weight birds exhibited higher egg production during weeks 24-28, while medium-weight hens surpassed heavy-weight counterparts between weeks 41-46, and light-weight hens outperformed heavy-weight birds in weeks 61-65. From weeks 57-65, no significant egg production differences were noted between heavy and medium-weight hens. Body weight at 19 weeks affected floor eggs, cracked eggs, and double-yolk eggs (P < 0.05) during weeks 22-34. Heavy-weight hens laid fewer floor eggs, medium-weight hens had fewer cracked eggs (0.3%), and light-weight hens produced fewer double-yolk eggs (1.1%). No significant impact of weight grouping on egg weight was observed. Results indicated that body weight at 19 weeks influences the laying cycle, with heavy, medium, and light-weight hens exhibiting distinct egg production patterns, nest use and egg quality traits at different phases of the cycle. ABSTRACT 86 05 19week week (heavy 148 1 48 1.4 001 0 01 0.0 SD N 17 medium 132 32 1.3 0039 039 0.03 51 light 119 1.1 0019 019 N172 N=17 65week 65 period Heavyweight Heavy 2428, 2428 24 28, 28 24-28 mediumweight heavyweight 4146, 4146 41 46, 46 41-46 lightweight 6165. 6165 61 65. 61-65 5765, 5765 57 65, 57-65 doubleyolk double yolk P 0.05 005 2234. 2234 22 34. 34 22-34 0.3%, 03 0.3% , 3 (0.3%) 1.1%. 11 1.1% . (1.1%) observed cycle patterns 8 14 4 1. 00 0. 13 003 5 N17 N=1 6 242 2 24-2 414 41-4 616 61-6 576 57-6 223 22-3 0.3 (0.3% (1.1% N1 24- 41- 61- 57- 22- (0.3 (1.1 (0. (1. (0 (1 (

Abstract Coccidiosis, a disease caused by the parasitic Eimeria spp., affects birds of all ages, particularly young birds more intensely. Infected poultry presents significant economic losses. Bacillus thuringiensis var israelensis (Bti) is a Gram-positive, spore-forming bacterium that produces proteins with high specific parasiticidal activity against various orders of parasites. Thus, the aim of the present study was to evaluate the parasiticidal potential of Bti in quails that were naturally infected with Eimeria bateri. Twenty 12-week-old male quails (Coturnix coturnix coturnix), naturally infected with Eimeria bateri, were randomly divided into two groups of 10 birds: Bti treated and control. The treated group was supplemented with Bti (1×108 spores∙g-1) in the feed, while; the control group received the same feed without Bti. To evaluate the occurrence of oocysts, samples of feces were collected every week for four weeks. Significant (P < 0.05) oocysts reductions of 56.64% and 94.51% were noted in the Bti treated group at 2nd and 4th week of study, respectively. The Bti supplementation may contribute to the reduction of oocysts in quails and environmental contamination. Bacillus thuringiensis var israelensis appeared to be a promising complementary alternative in E. bateri control.

O objetivo deste trabalho foi avaliar a eficácia do uso de cal virgem (CaO) para a redução de Salmonella spp. e Clostridium spp. em cama de aviário. Foram aplicados quatro tratamentos: T1- sem adição de cal virgem (controle), T2- aplicação de cal virgem na dose de 300g m-2, T3- aplicação de cal virgem na dose de 600g m-2 e T4- aplicação de cal virgem na dose de 900g m-2. Os valores médios observados para o pH da cama após o 12° dia de aplicação de cal virgem foram 8,95 e 9,91, 10,75 e 11,11 para os tratamentos 1, 2, 3 e 4, respectivamente. O número mais provável Log10 (UFC) de Salmonella spp. e Clostridium spp foi reduzido em 82 e 97% com a aplicação de cal na dosagem de 300g m-2 e 100% na dosagem de 600 e 900g m-2, ambos diferindo significativamente em relação ao controle (antes da aplicação da cal). A atividade de água da cama reduziu progressivamente (de 0,2 a 3,82%) com a utilização de níveis crescentes de cal. Conclui-se que o uso da cal na cama de aviário, mesmo nas doses mais baixas, reduz o número mais provável de Salmonella e Clostridium ssp.

This study aimed to evaluate the efficacy of quicklime (CaO) for reducing Salmonella and Clostridium spp. population in used litter from floor pens of broilers. Four treatments were tested: (T1) control (without quicklime); (T2) 300g quicklime m-2; (T3) 600g quicklime m-2; and (T4) 900g quicklime m-2. The following average pH values were observed 12 days after adding quicklime: 8.95, 9.91, 10.75 and 11.11 for treatments 1, 2, 3 and 4, respectively. An 82 and 97% reduction in the most probable number Log10 (CFU) of Salmonella and Clostridium spp, respectively, was observed when 300g m-2 of quicklime was added to the used litter from floor pens of broilers. Additionally, a 100% reduction was obtained when both 600 and 900g m-2 of quicklime were added, differing significantly from control (before adding quicklime). A progressive reduction in water activity (from 0.2 to 3.82%) was observed when growing levels of quicklime were used. In conclusion, even the lowest level of quicklime added to litter from floor pens of broilers reduces the most probable number of Salmonella and Clostridium spp.