EscherichiacolistrainMC1061(CasadabanandCohen,1980)wasusedasintermediatehost forcloningandhandledbystandardte(Widneretal ﹒.5g/Lyeastextract)at37℃﹒ Streptococcuszooepidemicuswascul vatedinTHYB [ Todd‐Hewitt(TH)broth(OXOID)supplementedwith0.5%yeastextract ] ......