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Milk quality and milk transformation parameters from infected mammary glands depends on the infecting bacteria species
Year:
2019
Source of publication :
PLoS ONE
Authors :
Jacoby, Shamay
;
.
Silanikove, Nissim
;
.
Volume :
14
Co-Authors:

Leitner, G., National Mastitis Reference Center, Kimron Veterinary Institute, Bet Dagan, Israel; Lavon, Y., Israel Cattle Breeders Association, Caesarea, Israel; Merin, U., Institute of Technology and Storage of Agricultural Products, Volcani Center Bet Dagan, Israel;  Blum, S.E., National Mastitis Reference Center, Kimron Veterinary Institute, Bet Dagan, Israel; Krifucks, O., National Mastitis Reference Center, Kimron Veterinary Institute, Bet Dagan, Israel;

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

The current study measured the influence of milk of subclinically infected glands by different bacteria species on the cow’s milk. The effects of bacterial infection or inflammation on gland milk yield were related to the bacteria species that caused the infection. The volume of milk of the inflamed gland from the cow’s milk yield was significantly lower (P<0.001) for the glands previously infected by Escherichia coli (PIEc) and those infected with Streptococcus dysgalactiae. Coagulation properties, rennet clotting time (RCT) and curd firmness (CF) also depended on the bacteria causing the infection. RCT values of all the inflamed glands were significantly longer (P<0.001) and CF values were significantly lower than that of the healthy ones. Moreover, in the whole milk, CF was also significantly lower and not proportional to the volume of the milk from the inflamed gland of the cow’s milk. Calculation of the predicted 40% dry matter curd weight (PCW) on the cow level, including the healthy and inflamed glands or the healthy glands alone, showed that for 10 of 13 PIEc cows, the presence of the affected gland’s milk in the whole cow milk resulted in a lower PCW value. Likewise, 7 of 20 cows infected by S. dysgalactiae had negative delta values. Unlike the latter bacteria, PCW from milk of glands infected with CNS increased, although in a lower magnitude than in the healthy glands. No correlation was found between logSCC in the whole cow milk (healthy and inflamed glands) and PCW. © 2019 Leitner et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Note:
Related Files :
bacterial infection
Bacterial Infections
Coagulation
Escherichia coli
milk quality
Streptococcus dysgalactiae
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Related Content
More details
DOI :
Article number:
213817
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
42995
Last updated date:
02/03/2022 17:27
Creation date:
05/08/2019 09:37
Scientific Publication
Milk quality and milk transformation parameters from infected mammary glands depends on the infecting bacteria species
14

Leitner, G., National Mastitis Reference Center, Kimron Veterinary Institute, Bet Dagan, Israel; Lavon, Y., Israel Cattle Breeders Association, Caesarea, Israel; Merin, U., Institute of Technology and Storage of Agricultural Products, Volcani Center Bet Dagan, Israel;  Blum, S.E., National Mastitis Reference Center, Kimron Veterinary Institute, Bet Dagan, Israel; Krifucks, O., National Mastitis Reference Center, Kimron Veterinary Institute, Bet Dagan, Israel;

Milk quality and milk transformation parameters from infected mammary glands depends on the infecting bacteria species

The current study measured the influence of milk of subclinically infected glands by different bacteria species on the cow’s milk. The effects of bacterial infection or inflammation on gland milk yield were related to the bacteria species that caused the infection. The volume of milk of the inflamed gland from the cow’s milk yield was significantly lower (P<0.001) for the glands previously infected by Escherichia coli (PIEc) and those infected with Streptococcus dysgalactiae. Coagulation properties, rennet clotting time (RCT) and curd firmness (CF) also depended on the bacteria causing the infection. RCT values of all the inflamed glands were significantly longer (P<0.001) and CF values were significantly lower than that of the healthy ones. Moreover, in the whole milk, CF was also significantly lower and not proportional to the volume of the milk from the inflamed gland of the cow’s milk. Calculation of the predicted 40% dry matter curd weight (PCW) on the cow level, including the healthy and inflamed glands or the healthy glands alone, showed that for 10 of 13 PIEc cows, the presence of the affected gland’s milk in the whole cow milk resulted in a lower PCW value. Likewise, 7 of 20 cows infected by S. dysgalactiae had negative delta values. Unlike the latter bacteria, PCW from milk of glands infected with CNS increased, although in a lower magnitude than in the healthy glands. No correlation was found between logSCC in the whole cow milk (healthy and inflamed glands) and PCW. © 2019 Leitner et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Scientific Publication
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