Sialidase protozoa

Sialidases have a wider distribution in Nature than have the sialic acids. They have been found in a variety of viruses (mainly ortho- and para-myxoviruses) which do not usually contain sialic acids,in many pathogenic and nonpathogcnic bacteria,110-3 10 -30H in several strains of the fungus Streptomyces alhus,309 in such protozoa as Trichomonas foetus,310,311 and in animal, including human, tissues.110,312... 

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