Expression of chicken epidermal growth factor (cEGF) in Escherichia coli regulates the microflora structure of the duodenum to improve growth performance and intestinal morphogenesis in broilers.

1. A study used gene synthesis to obtain the functional domains of chicken epidermal growth factor (cEGF) and examined their impact on broiler growth performance, small intestinal morphology, digestive enzyme activities in the intestinal contents and the structure of duodenal microflora.2. The pET-32a-cEGF recombinant expression vector was constructed. The specific band at 26 KDa was shown by SDS-PAGE analysis and WB results. The purified protein content was shown to be 1687 µg/ml by assay.3. A total of 180 healthy, one-day-old Arbor Acres male, white-feathered broilers were randomly divided into three dietary treatment groups (six replicate pens, 10 birds per replicate): A control diet (ND); cEGF diet (cEGF), control supplemented with 250 mg/kg cEGF and the control diet (CD) supplemented with 250 mg/kg chlortetracycline.4. The results showed that feeding the cEGF and CD diet reduced FCR of broilers aged 1-21 d, average daily feed intake (ADFI) at 22-42 d, and the FCR in the whole period (1-42 d; p < 0.05). Compared with the ND group, the cEGF diet increased duodenal α-amylase and alkaline phosphatase activities in the 1-21 d, duodenal lipase, alkaline phosphatase, and ileal alkaline phosphatase activities in the post-period and increased villus height in the duodenum and ileum (p < 0.05). In addition, the ACE and Chao1 index for the birds fed cEGF were higher than the ND group (p < 0.05). At the phyla level, Firmicutes and Proteobacteria were dominant in all groups. At the genus level, the dominant genus was Lactobacillus. The LEfSe analysis showed that the cEGF group was enriched by 11 species including Brevibacillus, Eisenbergiella, Cloacibacterium, Butyricoccus spp.5. The addition of 250 mg/kg cEGF to the diet can increase growth performance by improving intestinal development and digestive enzyme activity, which may be related to the duodenal intestinal microflora. Therefore, cEGF is an effective alternative to antibiotics in broiler farming.

[Clinical comparative trial of co-artemether and benflumetol (two formulations) in the treatment of falciparum malaria].

OBJECTIVE: To observe the efficacy and safety of co-artemether and one of its components benflumetol (two formulations) in the treatment of patients with falciparum malaria. METHODS: Adopting double-blining, randomization and comparative method, all patients were hospitalized and observed for 28 days after treatment. RESULTS: Of 150 patients, 51 patients were treated with co-artemether group(A), 50-patients were treated with benflumetol tablet group(B), 49 patients were freated with benflumetol capsule group(C). The mean fever clearance times for groups A, B and C were 17.1 +/- 8.6, 34.0 +/- 23.2 and 29.4 +/- 24.9 hours, respectively; the mean parasite clearance times were 29.7 +/- 8.9, 51.6 +/- 14.1 and 54.7 +/- 17.4 hours respectively; the cure rates in 28 days for groups A, B and C were 98.2%, 92.0% and 95.8%, respectively. No apparent side-effect was observed. CONCLUSION: Co-artemether and benflumetol (2 formulations) are effective for the treatment of patients with falciparum malaria but co-artemether is more effective than benflumetol (2 formulations) in terms of controlling symptoms and killing parasites.