ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (1): 193-202.doi: 10.11843/j.issn.0366-6964.2019.01.022

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Effect of Arula-7 Powder on Intestinal Mucosal Barrier in Rats Infected with Pathogenic Escherichia coli O1

YANG Siqin1, CHEN Aorigele2*, WANG Chunjie3, CHEN Yujie4   

  1. 1. College of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao 028000, China;
    2. College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China;
    3. College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, China;
    4. Vocational and Technical College of Inner Mongolia Agricultural University, Baotou 014109, China
  • Received:2018-04-03 Online:2019-01-23 Published:2019-01-24

Abstract:

This study was conducted to investigate the effect of Arula-7 powder on mechanical barrier, immune barrier and chemical barrier in rats infected with Escherichia coli O1. A total of 60 SD rats, 6-8 weeks old, were equally divided into the control group, untreated group and ciprofloxacin group, Arula-7 powder high (1.08 g·kg-1), medium (0.54 g·kg-1) and low (0.27 g·kg-1) dosage groups (n=10). The rate of protection was calculated. We collected the small intestine and the intestinal morphology indexes were measured by HE staining. Meanwhile, the serum and ileal tissue were also collected and the levels of D-lactic acid, DAO, sIgA and intestinal trefoil factor were detected using ELISA kit. The results showed that:(1) Arula-7 powder with medium dose had the highest protection rate of 50%. Furthermore, the medium dose of Arula-7 powder had positive effects on the improvement or recovery of the morphology of intestinal mucosa in rats infected with E. coli O1 and its effect was similar with that of ciprofloxacin. (2) There was no significant difference between the control group and the ciprofloxacin group in the level of D-lactic acid (P>0.05). The level of DAO had no significant difference between the control group and the Arula-7 powder medium/high dosage groups (P>0.05). (3)Except for Arula-7 powder low dosage group,the significant level of sIgA was observed in ileal mucosa of other four groups compared with the untreated group (P<0.05). The level of ITF in ileal mucosa of untreated group was significantly lower than other medicine treatment groups (P<0.05). In conclusion, Arula-7 powder has the best effect for repairing the intestinal mucosa injury in rats infected with E. coli O1 at medium dose (0.54 g·kg-1), and its effect is similar as that of the antibiotic ciprofloxacin.

Key words: pathogenic Escherichia coli, Arula-7 powder, intestinal mucosal barrier

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