• Journal of Radiation Industry
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• v.5 no.3
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• pp.279-283
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• 2011

This study was compared microbiological safety with gamma-irradiated porcine tendon and skin, as materials for the development of xenografts to regenerate damaged tissues and protect secondary contamination. The porcine tendon and skin were gamma-irradiated after inoculation of bacteria and virus to evaluate irradiation sensitivity of microorganisms. The result showed that the porcine tendon and skin were not different on the sensitivity of microorganisms by gamma irradiation. Bacteria inoculated in the porcine tendon and skin were confirmed that E. coli was the $D_{10}$ values of $0.32{\pm}0.082$ and $0.25{\pm}0.1kGy$ on tendon and skin, and B. subtilis was $4.00{\pm}0.312$ and $3.88{\pm}0.3kGy$ on gamma irradiation, respectively. Moreover, Virus inoculated in the porcine tendon and skin was observed that poliovirus (PV) was $6.26{\pm}0.332$ and $6.88{\pm}0.3kGy$, and porcine parvovirus (PPV) was $1.75{\pm}0.131$ and $1.73{\pm}0.2kGy$ and bovine viral diarrhoea virus (BVDV) was $3.70{\pm}0.212$ and $3.81{\pm}0.2kGy$ on gamma irradiation, respectively. Virus showed higher resistance compared to bacteria on gamma irradiation, but was not detected CPE (cytopathic effect) by virus both tendon and skin at 25 kGy, a standard dose recommended from IAEA for sterilization of medical products. Therefore, These results were considered that gamma irradiation could control effectively bacteria and virus to develop safe porcine xenograft, and apply same irradiation doses to all tissues including tendon and skin of porcine.