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Effects of plant extracts on diarrhea and intestinal morphology of piglets challenged with E. coli

Plant extracts may reduce diarrhea impact of piglets challenged with E. coli

Thursday 22 November 2012 (5 years 8 months ago)

A study was conducted to evaluate the effects of 3 different plant extracts (PE) on diarrhea and intestinal morphology of weaned pigs experimentally infected with a pathogenic F-18 E. coli (toxins: LT, STb, and SLT-2; 1010 CFU/3 mL oral dose daily for 3 d). Weaned pigs (n = 64, 6.3 ± 0.2 kg BW, 21 d old) were used in a 2 x 4 factorial arrangement (with or without an E. coli challenge; 4 diets (a nursery basal diet (CON), 10 ppm capsicum oleoresin, garlic, or turmeric oleoresin)) and housed in disease containment chambers for 15 d (4 d before and 11 d after the first inoculation (d 0)). The growth performance was measured on d 0 to 5, 5 to 11, and 0 to 11. Diarrhea score (DS; 1, normal, to 5, watery diarrhea) was recorded for each pig daily. Frequency of diarrhea (FD) was the percentage of pig days with DS of 3 or higher. Feces were collected on d 0, 3, 5, 8, and 11 and plated on blood agar to calculate a ratio (RHT) of β-hemolytic coliforms to total coliforms by assessing the populations visually using a score (0, no bacterial growth, to 8, very heavy bacterial growth). On d 5 and d 11, half of the pigs were killed to collect jejunum, ileum, and colon to measure villi height (VH), crypt depth (CD), and their ratio (VH:CD).

In the challenged group, the PE treatments reduced (P < 0.05) average DS from d 0 to 2 (2.23 vs. 3.43) and from d 6 to 11 (1.50 vs. 3.51) and overall FD (20 vs. 40%), increased ileal VH on d 5 (316 vs. 263 μm), and tended (P ≤ 0.10) to increase jejunum VH (303 vs. 259 μm) and VH:CD (1.42 vs. 1.15) compared with the CON, but did not affect growth performance and RHT. Garlic enhanced VH:CD (1.60 vs. 1.18) compared with capsicum oleoresin. In the sham group, PE treatments improved (P < 0.05) ADG from d 0 to 5 (418 vs. 328 g/d) and reduced average DS from d 3 to 5 (1.49 vs. 2.06) and overall FD (6.7 vs. 20%) compared with the CON. The E. coli infection worst overall ADG, G:F and VH, and increased DS, FD, and RHT as expected.

In conclusion, all 3 PE tested reduced diarrhea and increased the villi height of the small intestine of pigs infected with E. coli.

Y Liu, M Song, TM Che, JA Soares, D Bravo, CW Maddox, JE Pettigrew. 2011. Effects of plant extracts on diarrhea and intestinal morphology of newly weaned pigs experimentally infected with a pathogenic E. coli. Journal of Animal Science, 89 (E-Suppl. 2): page 134.

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Martha28-Feb-2013 (5 years 4 months 24 days ago)

Our experience with plant extracts to prevent post-weaning diarrhea says that it's a good altervative, and that combination of extracts can fight againsts the most important causative agents. We also found that cinnamon extract is very effective against pathogenic E.coli strains.
Congratulations for the blog!
www.plusvet.eu

chanakya28-Jan-2014 (4 years 5 months 24 days ago)

can I know which plant extracts combination can effectively prevent POST WEANING DIARRHEA in PIGLETS

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