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Nucleases of Some Udder Pathogenic Organisms
In Vivo and in Vitro Production
In vivo og in vitro nukleaseproduksjon hos enkelte jurpatogene mikroorganismer.
Acta Veterinaria Scandinavica volume 21, pages 256–266 (1980)
Abstract
The nuclease activity in quarter milk samples from cows with mastitis, and in vitro nuclease production by some udder pathogenic microorganisms were tested. Results concerning Staphylococcus aureus are, however, dealt with in a separate paper. Streptococcus dysgalactiae was found to be a vigorous and frequent producer of nuclease both in vivo and in vitro. The production by S. agalactiae was quantitatively inferior to that by S. dysgalactiae. Nearly half of the S. epidermidis strains were found to excrete a nuclease, and this enzyme was also demonstrated in the milk of cows with S. epidermidis mastitis.
Comparatively high nuclease activity was recorded in the udder secretions of some cows with summer mastitis. All the tested strains of Gorynebacterium pyogenes were nuclease positive when tested by agar plate methods.
Sammendrag
Innholdet av nuklease i kjertelprøver fra kyr med mastitt og in vitro produksjon av nuklease hos enkelte mastittbakterier er blitt undersøkt. Resultater vedrørende Staphylococcus aureus er imidlertid omtalt i en egen artikkeL De fleste stammene av Streptococcus dysgalactiae produserte nuklease in vivo og in vitro og produksjonen av enzymet hos denne bakterien var generelt sterkere enn hos de fleste andre av de undersøkte bakteriene. Streptococcus agalactiae produserte mindre nuklease enn S. dysgalactiae. Nesten halvparten av S. epidermidis-stammene var nuklease positive og dette enzymet ble også påvist i melk fra enkelte kyr med mastitt forårsaket av S. epidermidis.
I jursekret fra enkelte kyr med sommermastitt ble det funnet relativt høy nukleaseaktivitet. Alle de undersøkte stammene av Corynebacterium pyogenes produserte nuklease.
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Gudding, R. Nucleases of Some Udder Pathogenic Organisms. Acta Vet Scand 21, 256–266 (1980). https://doi.org/10.1186/BF03546888
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DOI: https://doi.org/10.1186/BF03546888