Two pairs of primers have been designed andsynthesized to be applied in PCR in-spection of Nosema bombycis(Zhenjiang strain).One of them was from the sequence of a putative pseudogene of small subunit rRNA(SSUrRNA)of N.b.SESNu.The other was from the sequence of a gene of SSUrRNA of Vairimorpha necatrix.DNAs from thereference strain of microsporidia.Hemerophila atrilineata,Bultler spores,and those of the larva,pupa,moth inoculated with Nosema bombycis,were specifically amplified byPCR.Both of them gave expe...