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Differentiation of variants of Prototheca zopfii



Differentiation of variants of Prototheca zopfii



Archiv fur Experimentelle Veterinarmedizin 39(3): 387-397



210 isolates of the alga were obtained from faeces of cattle and swine (38), mastitis secretion of cow (58), indoor areas (51) and outdoor spaces (23) of animal houses, area surrounding animal houses (36), and feed silos (4). Three variants, which exhibited additional differences in pH and NaCl tolerance, were distinguished from one another by means of electron microscopy, criteria of differentiation being intensity and rate of galactose and glycerol assimilation, different cell sizes and shapes, and differences in mitotic activity. Variant I was primarily recorded from faeces in cowsheds and pigsties. Variant II was found, in the first place, in mastitis secretion as well as in bovine faeces, cattle sheds and in communal sewage. Variant III occurred mainly in faeces and houses of pigs. In the GDR since 1975, protothecal mastitis of cattle has been caused exclusively by Variant II of P. zopfii.

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Accession: 001336438

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PMID: 4051655



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