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KMID : 0359320030430010087
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Korean Journal of Veterinary Research
2003 Volume.43 No. 1 p.87 ~ p.94
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A comparison of lytic activity of swine and chicken phages with Staphylococcus hyicus of swine, chicken and cattle origin
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Abstract
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The lytic activity of the set of swine and chicken phages which were derived from lysogenic Staphylococcus hyicus strains of swine and chicken origin was compared by means of S. hyicus isolated from swine. chicken and cattle. Of the 80 strains each from swine and chicken, 71 (88.8%) of strains from swine and all the strains of chicken origin were found to be lysogenic. Swine phages showed wider range of lytic activity to the examined strains than that of chicken phages. Using chicken phasges at 100×routine test dilution (RTD), 25.0%, 85.6%, and 50.0% of swine, chicken and bovine strains were lysed, respectively. However, when the set of swine phages was used at 100×RTD, higher frequency of the typable strains was found in strains of swine and chicken origin (73.8% and 90.2%). Phage F12 and L16 from chicken set were found to be highly active with chicken and bovine strains. On the contrary, all the swine strains were completely resistant to lysis by the two phages at 100×RTD. Thirteen (12.5%) of 104 S. aureus strains, 1 (1.8%) of 55 S. simulance strains, 31 (58.5%) of 53 S. chromogenes strains, and none of 31 strains of other coagulase-negative Staphulococcus species isolated from bovine mastitis were typable with the set of swine phages.
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