Composition of Proteins in Milk with Varying Leucocyte Contents

Haenlein, G.F.W.; Schultz, L.H.; Zikakis, John P.

doi:10.3168/jds.s0022-0302(73)85299-3

Cited by 81 publications

(43 citation statements)

References 16 publications

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“…Similar changes in total protein, whey protein, casein and casein number occurred in our study. The lower casein levels in affected quarters in groups 2 and 3 agree with other studies, in which casein levels decreased with increased SCC and subclinical mastitis (Haenlein et al, 1973;Harmon, 1994;Auldist et al, 1996).…”

Section: Discussionsupporting

confidence: 91%

Udder quarter milk composition at different levels of somatic cell count in cow composite milk

Forsbäck

Lindmark-Månsson²,

Andrén

et al. 2009

Animal

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Automatic milking systems have made possible the separation of high-and low-quality milk at the udder quarter level during the milking process. The aim of this study was to investigate the composition and yield of milk from individual udder quarters to determine whether deteriorated milk composition occurs in udders that are assumed to be healthy and whether quarters with high-quality milk are found in udders with high milk somatic cell count (SCC). Milk samples were collected on one occasion from 90 cows at udder quarter level and cow composite level. The milk was analyzed for content of total protein, whey protein, casein, fat, lactose, citric acid and SCC; milk yield was registered. The cows were divided into three groups depending on the SCC of their composite milk. Cows in group 1, cow composite SCC , 100 000 cells/ml, were assumed to have healthy udders. However, instances of increased SCC and decreased milk quality were discovered in one or more udder quarters of approximately 30% of the group. Cows in group 2, cow composite SCC of 100 000 to 300 000 cells/ml, and group 3, cow composite SCC . 300 000 cells/ml, were assumed to have affected udders. However, the majority of these cows had one or more udder quarters in which increased SCC and deteriorated milk quality were not detected. Calculations of bulk-tank milk values, when separation of milk from affected udder quarters was performed, indicate that SCC changes to a much greater degree compared to the other milk components. These results show that milk from affected udder quarters suffers compositional changes, but calculations of simulated separation indicate that the compositional changes in bulk-tank milk are small. The effect of separation of milk from individual udder quarters on bulk-tank milk needs to be further studied.

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Section: Discussionsupporting

confidence: 91%

Udder quarter milk composition at different levels of somatic cell count in cow composite milk

Forsbäck

Lindmark-Månsson²,

Andrén

et al. 2009

Animal

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“…These findings are in line with those of Urech et al (1999). Haenlein et al (1973) present significantly lower contents of casein, a s1 -CN, b-CN, b-lactoglobulin, a-lactalbumin and whey proteins, and a lower casein number with increasing degrees of subclinical mastitis and SCC. A study by Le Roux et al (1995) showed that protein composition starts to change even at low levels of SCC (.250 000 cells/ml) in udder quarter milk.…”

Section: Forsbä Ck Lindmark-må Nsson André N and Svennersten-sjaunjasupporting

confidence: 89%

Evaluation of quality changes in udder quarter milk from cows with low-to-moderate somatic cell counts

Forsbäck

Lindmark-Månsson²,

Andrén

et al. 2010

Animal

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Much emphasis has been put on evaluating alterations in milk composition caused by clinical and subclinical mastitis. However, little is known about changes in milk composition during subclinical mastitis in individual udder quarters with a low-tomoderate increase in milk somatic cell count (SCC). This information is needed to decide whether milk from individual udder quarters with a moderate-to-high increase in milk SCC should be separated or not. The aim of this study was to determine how milk composition in separate udder quarters is affected when cow composite milk has low or moderately increased SCC levels. Udder quarter and cow composite milk samples were collected from 17 cows on one occasion. Milk yield was registered and samples were analyzed for SCC, fat, total protein, whey proteins, lactose, citric acid, non-protein nitrogen (NPN), lactoferrin, protein profile, free fatty acids (FFAs), lactate dehydrogenase (LDH), proteolysis, sodium and potassium. Bacteriological samples were collected twice from all four quarters of all cows. The cows were divided into three groups depending on their SCC at udder quarter level. The first group comprised healthy cows with four udder quarters with low SCC, , 50 000 cells/ml; composition was equal when opposite rear and front quarters were compared. In the second and the third groups, cows had one udder quarter with 101 000 cells/ml , SCC , 600 000 cells/ml and SCC . 700 000 cells/ml, respectively. The remaining udder quarters of these cows had low SCC (, 100 000 cells/ml). Despite the relatively low average cow composite SCC 5 100 000 cells/ml of Group 2, milk from affected udder quarters exhibited lower casein number, content of lactose and b-casein (b-CN), while the content of whey protein, sodium, LDH and a-lactoalbumin (a-la) were higher compared to healthy opposite quarters. In addition to these changes, milk from affected udder quarters in Group 3 also exhibited lower values of potassium and a s1 -casein (a s1 -CN) and higher values of lactoferrin when compared to milk from opposite healthy quarters. This indicates that even when the SCC in cow composite milk is low, there might exist individual quarters for which milk composition is changed and milk quality impaired.

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“…Bianchi et al (2004), Duranti and Casoli (1991), Revilla et al (2009) κ-Casein ? Anderson and Andrews (1977), Haenlein et al (1973), Rogers et al (1989b), Verdi et al (1987) ? Bianchi et al (2004), Revilla et al (2009) γ-Casein Diaz et al (1996), Duranti and Casoli (1991), Nudda et al (2003), Pellegrini et al (1997), Pirisi et al (2000Pirisi et al ( , 1996, Revilla et al (2009) ↑ Jaubert et al (1996, Le Mens et al (1996), Leitner et al (2004b), Morgan and Gaspard (1999), Pasquini et al (1996) α-Lactalbumin (1999) Total Mg ?…”

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

confidence: 95%

“…Pisoni et al (2004a, b), Pizzillo et al (1996), Ying et al (2002) Total casein ↓ Ballou et al (1995), Coulon et al (2002), Haenlein et al (1973), Klei et al (1998), Lee et al (1991), Mazal et al (2007), Muir (1996), O'Brien et al (2001), Ogola et al (2007), Politis and Ng-KwaiHang (1988b), Urech et al (1999), Waes and Belleghem (1969), Wickstrom et al (2009) ? Albenzio et al (2005Albenzio et al ( , 2004, Bianchi et al (2004), Diaz et al (1996), Duranti and Casoli (1991), Jaeggi et al (2003), Nudda et al (2003), Pellegrini et al (1997)…”

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

confidence: 95%

“…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 (2003), Nudda et al (2003), Pellegrini et al (1997), Pirisi et al (2000Pirisi et al ( , 1996, Vivar-Quintana et al (2006) ? Pisoni et al (2004a, b), Pizzillo et al (1996), Ying et al (2002) Total casein ↓ Ballou et al (1995), Coulon et al (2002), Haenlein et al (1973), Klei et al (1998), Lee et al (1991), Mazal et al (2007), Muir (1996), …”

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

confidence: 96%

See 1 more Smart Citation

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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Composition of Proteins in Milk with Varying Leucocyte Contents

Cited by 81 publications

References 16 publications

Udder quarter milk composition at different levels of somatic cell count in cow composite milk

Udder quarter milk composition at different levels of somatic cell count in cow composite milk

Evaluation of quality changes in udder quarter milk from cows with low-to-moderate somatic cell counts

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

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