A Combination of Egg Yolk IgY and Phosvitin Inhibits the Growth of Enterotoxigenic Escherichia coli K88 and K99.

Abstract:

BACKGROUND:Enterotoxigenic Escherichia coli (ETEC) is the main cause of fatal diarrhea in piglets during the first week of life and over the time of weaning. Pathogenesis of ETEC-causing diarrhea involves intestinal colonization mediated by fimbriae. Although, both IgY and egg yolk phosvitin (PV) possess antimicrobial activity, their combined activity has not been explored. A combination of IgY specific for ETEC and metal-chelating PV may show synergistic effect in reducing the growth of ETEC by inhibiting bacterial proliferation and stipulating protection against ETEC infection. OBJECTIVE:The goal of this study was to determine the effects of anti-ETEC IgY and PV on in vitro growth inhibition of ETEC strains possessing K88 and K99 fimbriae prevalent in the porcine population. METHODS:Anti-K88 and -K99 IgY antibodies were obtained from egg yolks of 23-week-old Single- Comb White Leghorn hens immunized with K88 and K99 fimbriae of ETEC, respectively, with high titres sustained over 6 to 8 weeks of the immunization period. Specific IgY, PV, and PV-hydrolysate from alcalase-hydrolysis under high hydrostatic pressure (PVH-Alc-HHP) alone or in combination, were used to treat ETEC K88 and K99 cultures at optimal concentrations of 100 μg/mL, 1 mg/mL, and 1 mg/mL, respectively, for 24 h. RESULTS:PVH-Alc-HHP demonstrated the highest degree of hydrolysis, 38.9%. Combined use of IgY and PVH-Alc-HHP showed the highest bactericidal effect resulting in ETEC K88 and K99 growth inhibition of 2.8 and 2.67 log CFU/mL, respectively. CONCLUSION:Combined IgY-PVH effectively control ETEC, therefore holds a great potential for microbial control in veterinary pharmaceutical industry.

journal_name

Curr Pharm Biotechnol

authors

Gujral N,Yoo H,Bamdad F,Lee KY,Suh JW,Sunwoo H

doi

10.2174/1389201018666170425120036

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

400-409

issue

5

eissn

1389-2010

issn

1873-4316

pii

CPB-EPUB-83013

journal_volume

18

pub_type

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