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Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea

Kang-Hyun Baek, Warisraporn Tangchang, Eun-Jin Choi, Wan-Ky Lee, Kyung-Hyun Lee, Hyun-Kyung Lee, Jae-Won Byun, Hwa-Young Son.


Abstract
Background:
Escherichia coli infections have been causing post-weaning diarrhea (PWD) and edema disease (ED) for many years in the porcine industry. In animals, it is classified into pathotypes and serotypes, according to virulence factors. Serotyping is performed for O, K, H, and F antigens, which are important for discriminating pathogenicity and epidemiology. Furthermore, E. coli strains that produce F18 fimbriae are major sources of ED and PWD associated with Shiga-toxin producing E. coli (STEC) expressing F18ab, and enterotoxigenic E. coli (ETEC) expressing F18ac, respectively.
Aim:
To investigate the pathogenicity potential and infection characteristics of an experimental infection and confirm the pathological features of the Korean STEC/ETEC strains F18ab and F18ac in piglets.
Methods:
Three-week-old pigs were randomized into three experimental groups: infected G1 (F18ab), infected G2 (F18ac), and G3 (control). General health status was monitored daily, and pathological changes were evaluated.
Results:
Diarrhea occurred in all infected piglets. Pathological changes were only observed in the small intestine and regional lymph nodes. In G1, mucosal necrosis, inflammatory cell infiltration with hemorrhagic lesions, and apoptotic cell death in the tunica media of arterioles in the small intestine were observed. In contrast, the mucosa and epithelium appeared almost intact, with no abnormal vessel lesions in G2.
Conclusions:
Both strains which isolated from pigs in Korea could be infected and did not spread from the alimentary tract to other organs. The pathological features were quite different among the F18 subtypes. The F18ab strain was more virulent than F18ac, and virulence characteristics of the F18ac strain were more similar to ETEC than to STEC.

Key words: Edema disease, Enteropathogenic Escherichia coli, F18 variants, Korean stains, post-weaning diarrhea.


 
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How to Cite this Article
Pubmed Style

Baek K, Tangchang W, Choi E, Lee W, Lee K, Lee H, Byun J, Son H. Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea. Open Vet J. 2023; 13(6): 705-714. doi:10.5455/OVJ.2023.v13.i6.5

Web Style

Baek K, Tangchang W, Choi E, Lee W, Lee K, Lee H, Byun J, Son H. Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea. https://www.openveterinaryjournal.com/?mno=148029 [Access: May 02, 2024]. doi:10.5455/OVJ.2023.v13.i6.5

AMA (American Medical Association) Style

Baek K, Tangchang W, Choi E, Lee W, Lee K, Lee H, Byun J, Son H. Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea. Open Vet J. 2023; 13(6): 705-714. doi:10.5455/OVJ.2023.v13.i6.5


Vancouver/ICMJE Style

Baek K, Tangchang W, Choi E, Lee W, Lee K, Lee H, Byun J, Son H. Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea. Open Vet J. (2023), [cited May 02, 2024]; 13(6): 705-714. doi:10.5455/OVJ.2023.v13.i6.5


Harvard Style

Baek, K., Tangchang, . W., Choi, . E., Lee, . W., Lee, . K., Lee, . H., Byun, . J. & Son, . H. (2023) Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea. Open Vet J, 13 (6), 705-714. doi:10.5455/OVJ.2023.v13.i6.5


Turabian Style

Baek, Kang-Hyun, Warisraporn Tangchang, Eun-Jin Choi, Wan-Ky Lee, Kyung-Hyun Lee, Hyun-Kyung Lee, Jae-Won Byun, and Hwa-Young Son. 2023. Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea. Open Veterinary Journal, 13 (6), 705-714. doi:10.5455/OVJ.2023.v13.i6.5


Chicago Style

Baek, Kang-Hyun, Warisraporn Tangchang, Eun-Jin Choi, Wan-Ky Lee, Kyung-Hyun Lee, Hyun-Kyung Lee, Jae-Won Byun, and Hwa-Young Son. "Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea." Open Veterinary Journal 13 (2023), 705-714. doi:10.5455/OVJ.2023.v13.i6.5


MLA (The Modern Language Association) Style

Baek, Kang-Hyun, Warisraporn Tangchang, Eun-Jin Choi, Wan-Ky Lee, Kyung-Hyun Lee, Hyun-Kyung Lee, Jae-Won Byun, and Hwa-Young Son. "Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea." Open Veterinary Journal 13.6 (2023), 705-714. Print. doi:10.5455/OVJ.2023.v13.i6.5


APA (American Psychological Association) Style

Baek, K., Tangchang, . W., Choi, . E., Lee, . W., Lee, . K., Lee, . H., Byun, . J. & Son, . H. (2023) Experimental infection of post-weaned pigs with F18-encoding enterotoxigenic and enterotoxigenic/shigatoxigenic Escherichia coli stain isolated from the diarrheic feces in Korea. Open Veterinary Journal, 13 (6), 705-714. doi:10.5455/OVJ.2023.v13.i6.5


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