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#34068418   2021/05/13 To Up

Effects of Dietary Supplementation of gEGF on the Growth Performance and Immunity of Broilers.

EGF has been shown to stimulate the growth of animals. In this study, the content of EGF in chicken embryos (gallus EGF, gEGF) aged from 1 to 20 days of incubation were determined by ELISA kit, and the 5-day-old chicken embryos with the highest content of 5593 pg/g were selected to make gEGF crude extracts. A total of 1500 1-day-old Xianju chickens were randomly divided into five groups with six replicates of 50 chickens each. The control group was fed a basal diet, and other treatment diets were supplemented with 4, 8, 16 and 32 ng/kg gEGF crude extract, respectively. The experiment lasted for 30 days. Chicks were harvested at the end of the experiment, and liver, spleen, thymus, bursa and serum samples were collected. Results showed that average daily gain (ADG) and average daily feed intake (ADFI) of 16 ng/kg group were higher than those in the control group ( < 0.05). The serum uric acid (UA) of the 16 ng/kg group was reduced ( < 0.01), and the serum alkaline phosphatase (AKP) of the 16 ng/kg group increased ( < 0.01). The gEGF extract also increased chick's antioxidant capacity, decreased malondialdehyde (MDA) and increased catalase (CAT) in the liver and serum of 16 ng/kg groups in compared to the control group ( < 0.01). Furthermore, immunity was improved by the addition of gEGF to broiler diets. The serum immunoglobin A (IgA) content of 8 and 16 ng/kg groups and the serum immunoglobin M (IgM) content of 4 and 8 ng/kg groups were increased ( < 0.05) compared to the control group. The bursa index of each experimental group was higher than the control group ( < 0.01). These findings demonstrate that the crude extract of gEGF prepared in this experiment could improve the growth performance, antioxidant capacity and immunity of broilers.
Jianyong Zhou, Jingyi Yao, Luhong Bai, Chuansong Sun, Jianjun Lu

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#26108008   // To Up

Epidemiological aspects of Toxoplasma gondii infection in riverside communities in the Southern Brazilian Amazon.

Toxoplasma gondii infection is widely prevalent in humans and other animals worldwide. Information on the prevalence of T. gondii infection is scarce in some regions of Brazil, including riverside communities along the Amazon River basin.
Sérgio Neto Vitaliano, Gabriel Maciel de Mendonça, Felipe Amsterdam Maia de Sandres, Juliana de Souza Almeida Aranha Camargo, Paulo de Tarso, Sérgio de Almeida Basano, Jéssica Carolinne Damasceno E Silva, Viviane Krominski Graça de Souza, Glenci Cartonilho, Alexandre Thomé da Silva de Almeida, Solange Maria Gennari, Luís Marcelo Aranha Camargo

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