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Determinants of bacterial replication rates in mastitic whey

Published online by Cambridge University Press:  01 June 2009

Tuna Mattila ,
Jouko Syväjärvi ,
Niels-Einar Jensen  and
Markus Sandholm
Tuna Mattila
Affiliation:
Department of Pharmacology and Toxicology, College of Veterinary Medicine, SF 00551 Helsinki 55, Finland
Jouko Syväjärvi
Affiliation:
Finnish Animal Breeding Association, Vantaa, Finland
Niels-Einar Jensen
Affiliation:
State Veterinary Serum Laboratory, Ringsted, Denmark
Markus Sandholm
Affiliation:
Department of Pharmacology and Toxicology, College of Veterinary Medicine, SF 00551 Helsinki 55, Finland
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Summary

Bacterial growth was measured by a turbidimetric microtechnique in the whey of milk samples from quarters of cows with subclinical mastitis. Samples were grouped according to bacterial isolates recovered and the effects of bacterial species and whey on bacterial growth rates were analysed. Different strains of bacteria and different whey samples gave highly significant differences in bacterial replication rates. Except for penicillin-resistant Staphylococcus aureus, bacteria grew better in whey from mastitic milk where the inflammation was caused by the same bacterial species than in other mastitic milk samples. Inflammation caused by major pathogens generally enhanced the growth in whey of any type of major pathogen. Since mastitis pathogens showed enhanced growth in whey prepared from the same milk from which they were isolated, specific antibacterial factors in the whey did not appear to restrict bacterial growth in whey. The nutritional quality of the medium seems to be the important determinant of bacterial growth.

Type
Original Articles
Information
Journal of Dairy Research , Volume 53 , Issue 2 , May 1986 , pp. 197 - 202
Copyright
Copyright © Proprietors of Journal of Dairy Research 1986

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References

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