Hard Ewe's Milk Cheese Manufactured from Milk of Three Different Groups of Somatic Cell Counts

Jaeggi, J.J.; Govindasamy-Lucey, S.; Berger, Yves; Johnson, Mark E.; McKusick, Brett C; Thomas, D. J.; Wendorff, W.L.

doi:10.3168/jds.s0022-0302(03)73908-3

Cited by 77 publications

(122 citation statements)

References 26 publications

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“…Numerous authors have shown that a high level of somatic cells in ewe milk is connected with a higher protein percentage compared with the protein content in low SCC milk (Nudda et al, 2003;Albenzio et al, 2004;Bianchi et al, 2004). However, other authors reported low protein contents in milk with a high SCC (Jaeggi et al, 2003). Other investigations have shown no differences in protein content in ewe milk with high and low somatic cell levels (Pirisi et al, 1996(Pirisi et al, , 2000.…”

Section: Introductionmentioning

confidence: 81%

Milk yield and composition in line 05 dairy ewes as related to somatic cell counts

Olechnowicz¹,

Jaśkowski²,

Antosik³

et al. 2009

J. Anim. Feed Sci.

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A total of 1512 milk samples from udder halves was collected at monthly intervals from 189 line 05 dairy ewes throughout milking periods. Each ewe was tested 4 times. Milk composition was examined in terms of somatic cell contents (SCC) in ewe milk in three groups: group 0 consisted of ewes that on each test day had ≤250 × 10 3 cells/ml in left and right udder halves, group 1 comprised ewes with ≤250 × 10 3 in one half of the udder and >250 × 10 3 cells/ml in the other half, whereas group 2 contained ewes that had >250 × 10 3 cells/ml in the left and right udder halves (also on each test day). SCC in milk from one or both halves of udders exceeding 250 × 10 3 cells/ml resulted in a statistically significant (P<0.01), 20.7%, decrease in daily milk production.Correlation coefficients between SCC and fat and protein percentages in milk were positive and equaled 0.24 and 0.18, respectively. A negative value of the correlation coefficient was recorded between log SCC and lactose percentage (-0.49).

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Section: Introductionmentioning

confidence: 81%

Milk yield and composition in line 05 dairy ewes as related to somatic cell counts

Olechnowicz¹,

Jaśkowski²,

Antosik³

et al. 2009

J. Anim. Feed Sci.

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“…Randolph and Erwin (1974), Rogers et al (1989a), Somers et al (2003), Waes andBelleghem (1969), Wickstrom et al (2009) ? Albenzio et al (2004), Alichanidis and Polychroniadou (1995), Bianchi et al (2004), Diaz et al (1996), Jaeggi et al (2003), Nudda et al (2003), Pellegrini et al (1997), Pirisi et al (2000Pirisi et al ( , 1996, Revilla et al (2007), VivarQuintana et al (2006) ? Baudry et al (1997), Leitner et al (2004b), Pasquini et al (2002), Pisoni et al (2004a, b), Ying et al (2002) Free fatty acid Alichanidis and Polychroniadou (1995), Bianchi et al (2004), …”

Section: Changes In Milk Associated With a Rise In The Scc And Variatmentioning

confidence: 94%

“…Baudry et al (1997), Leitner et al (2004b), Pasquini et al (2002), Pisoni et al (2004a, b), Ying et al (2002) Free fatty acid Alichanidis and Polychroniadou (1995), Bianchi et al (2004), Bufano et al (1996), Diaz et al (1996), Duranti and Casoli (1991), Nudda et al (2003, Pirisi et al (2000, Revilla et al (2007), VivarQuintana et al (2006) ? Jaubert et al (1996), Pasquini et al (1996), Zeng and Escobar (1996), Leitner et al (2004b) Total protein Bufano et al (1996), Diaz et al (1996), Duranti and Casoli (1991), El-Saied et al (1999), Jaeggi et al...…”

Section: Changes In Milk Associated With a Rise In The Scc And Variatmentioning

confidence: 96%

Mastitis impact on technological properties of milk and quality of milk products—a review

Maréchal

Thiéry²,

Vautor

et al. 2011

Dairy Science & Technol.

148

139

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The consequences of mastitis on the technological properties of milk and on the quality of milk products are widely reported in the literature. Besides, recent advances have shed light on the mechanisms involved in the udder response and subsequent milk changes in mastitis cases. This review gives an update on the literature regarding the impact of mastitis on milk composition and processing properties and collates recent data regarding the mechanisms involved in mastitis effects. It is an attempt to link field observations and experimental studies in order to better understand how mastites affect so dramatically the technological properties of milk. Both bovine and small ruminant milks are considered and a special emphasis is given on the role of staphylococci, streptococci, and Escherichia coli, the most common causative agents of mastitis.

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“…This diminution is known (e.g. Jaeggi et al, 2003;Albenzio et al, 2004) but very hard to quantify and for this reason we ignored it. There are two types of farms in the Latxa breed, according to their final product: cheese-farmers (those who elaborate home-made cheese and sell it), and milkfarmers (those who sell milk to cheese factories).…”

Section: Economics Of Scc In Dairy Sheepmentioning

confidence: 99%

Economic weights of somatic cell score in dairy sheep

Legarra

Ramón

Ugarte

et al. 2007

Animal

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The economic weights for somatic cell score (SCS) have been calculated using profit functions. Economic data were collected in the Latxa breed. Three aspects have been considered: bulk tank milk payment, veterinary treatments due to high SCS, and culling. All of them are non-linear profit functions. Milk payment is based on the sum of the log-normal distributions of somatic cell count, and veterinary treatments on the probability of subclinical mastitis, which is inferred when individual SCS surpass some threshold. Both functions lead to non-standard distributions. The derivatives of the profit function were computed numerically. Culling was computed by assuming that a conceptual trait culled by mastitis (CBM) is genetically correlated to SCS. The economic weight considers the increase in the breeding value of CBM correlated to an increase in the breeding value of SCS, assuming genetic correlations ranging from 0 to 0.9. The relevance of the economic weights for selection purposes was checked by the estimation of genetic gains for milk yield and SCS under several scenarios of genetic parameters and economic weights. The overall economic weights for SCS range from 22.6 to 2 9.5 e per point of SCS, with an average of 2 4 e per point of SCS, depending on the expected average SCS of the flock. The economic weight is higher around the thresholds for payment policies. Economic weights did not change greatly with other assumptions. The estimated genetic gains with economic weights of 0.83 e per l of milk yield and 24 e per point of SCS, assuming a genetic correlation of 20.30, were 3.85 l and 2 0.031 SCS per year, with an associated increase in profit of 3.32 e. This represents a very small increase in profit (about 1%) relative to selecting only for milk yield. Other situations (increased economic weights, different genetic correlations) produced similar genetic gains and changes in profit. A desired-gains index reduced the increase in profit by 3%, although it could be greater depending on the genetic parameters. It is concluded that the inclusion of SCS in dairy sheep breeding programs is of low economic relevance and recommended only if recording is inexpensive or for animal welfare concerns.

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Hard Ewe's Milk Cheese Manufactured from Milk of Three Different Groups of Somatic Cell Counts

Cited by 77 publications

References 26 publications

Milk yield and composition in line 05 dairy ewes as related to somatic cell counts

Milk yield and composition in line 05 dairy ewes as related to somatic cell counts

Mastitis impact on technological properties of milk and quality of milk products—a review

Economic weights of somatic cell score in dairy sheep

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