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http://dx.doi.org/10.9799/ksfan.2014.27.2.213

Enterotoxin Productivity and Antimicrobial Susceptibility of Bacillus cereus BY06 Isolated from Pigs with Diarrheal Disease  

Wu, Wei-Jie (Dept. of Food Science & Biotechnology, Chonbuk National University)
Rho, Youg-Hwan (Dept. of Food Science & Biotechnology, Chonbuk National University)
Ahn, Byung-Yong (Dept. of Oriental Medicine Resources, Chonbuk National University)
Publication Information
The Korean Journal of Food And Nutrition / v.27, no.2, 2014 , pp. 213-218 More about this Journal
Abstract
The enterotoxin production and antimicrobial susceptibility on hemolytic strains from stools of diarrheal pigs was investigated in this study. Through morphological observation, gyrB nucleotide sequence, and API kit analysis, the selected potential pathogenic strain BY06 was identified as Bacillus cereus. Because the characteristic of enterotoxin symptoms were widely caused by Bacillus cereus strains, a PCR test was carried out in order to check the enterotoxin genes (hblA) in this strain. According to the results, this strain was an enterotoxin positive strain containing the hblA gene. The minimum inhibitory concentrations of 10 different antimicrobial agents were screened by the agar dilution test, indicating that this strain was resistant to penicillin G and intermediate to erythromycin; however, it susceptible to cephalothin, vancomycin, clindamycin, fusidic acid, gentamicin, ciprofloxacin, tetracycline and rifampin. These results suggest that the B. cereus BY06 isolated from pig feces has a potential risk of producing enterotoxin and is resistant to penicillin G, but susceptible to various antimicrobial agents.
Keywords
antimicrobial agents; Bacillus cereus; enterotoxin; hemolytic; PCR;
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