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EFFECT OF MICROORGANISMS ON THE D-AMINO ACID CONTENT OF MILK
Gabriella Pohn
; University of Kaposvar, Kaposvar
Csilla Albert
; Hungarian University of Transylvania, Csikszereda
Szidonia Salamon
; Hungarian University of Transylvania, Csikszereda
Petar Sara
; University of Kaposvar, Kaposvar
Beata Albert
; Hungarian University of Transylvania, Csikszereda
Janosne Csapo
; University of Kaposvar, Kaposvar
Janos Csapo
; University of Kaposvar, Kaposvar
Sažetak
In the course of our experiments it was established that certain microbe species causing mastitis (inflammation of the udder) (Streptococcus dysgalactiae, Streptococcus uberis, Escherichia coli, Staphylococcus aureus, Pasteurella multocida, Corynebacterium bovis, Arcanobacter pyogenes and Pseudomonas aeruginosa) contributed to the D-aspartic acid, D-glutamic acid and D-alanine contents of milk to a different extent. However the examination of amino acids was only partially suitable for identification of pathogen microbe species causing mastitis. Out of D-amino acids of peptidoglycann the D-glutamic acid content provides the possibility for identifying the microbes. Based on the Daspartic acid content only Mastitest-negative milk sample and the species Staphylococcus aureus can be identified. On the basis of the D-alanine content microbes examined by us, with the exception of the species Escherichia coli, Streptococcus aureus and Pseudomonas aeruginosa could be identified. The free amino acid contents of milk derived from mastitic udder with mastitis caused by the individual bacterial species did not differ significantly. There are, however, such free amino acids whose proportion is characteristic of the given microbe species. The species Streptococcus uberis produces the least glycine, for the Escherichia coli is typical the very high phenylalanine content. Milk derived from mastitic udder with mastitis caused by Pseudomonas aeruginosa contained most of the free lysine.
Ključne riječi
D-amino acids; free amino acids; mastitits, microorganisms, bacterial species; milk
Hrčak ID:
28039
URI
Datum izdavanja:
20.3.2007.
Posjeta: 651 *