Hard Ewe's Milk Cheese Manufactured from Milk of Three Different Groups of Somatic Cell Counts
Open Access
- 1 October 2003
- journal article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 86 (10), 3082-3089
- https://doi.org/10.3168/jds.s0022-0302(03)73908-3
Abstract
As ovine milk production increases in the United States, somatic cell count (SCC) is increasingly used in routine ovine milk testing procedures as an indicator of flock health. Ovine milk was collected from 72 East Friesian-crossbred ewes that were machine milked twice daily. The milk was segregated and categorized into three different SCC groups: 1,000,000 cells/ml (group III). Milk was stored frozen at −19°C for 4 mo. Milk was then thawed at 7°C over a 3-d period before pasteurization and cheese making. Casein (CN) content and CN-to-true protein ratio decreased with increasing SCC group 3.99, 3.97, to 3.72% CN, and 81.43, 79.72, and 79.32% CN to true protein ratio, respectively. Milk fat varied from 5.49, 5.67, and 4.86% in groups I, II, and III, respectively. Hard ewe's milk cheese was made from each of the three different SCC groups using a Manchego cheese manufacturing protocol. As the level of SCC increased, the time required for visual flocculation increased, and it took longer to reach the desired firmness for cutting the coagulum. The fat and moisture contents were lower in the highest SCC cheeses. After 3 mo, total free fatty acids (FFA) contents were significantly higher in the highest SCC cheeses. Butyric and caprylic acids levels were significantly higher in group III cheeses at all stages of ripening. Cheese graders noted rancid or lipase flavor in the highest SCC level cheeses at each of the sampling points, and they also deducted points for more body and textural defects in these cheeses at 6 and 9 mo.Keywords
This publication has 26 references indexed in Scilit:
- CHANGES IN CHEMICAL, SENSORY AND RHEOLOGICAL CHARACTERISTICS OF MANCHEGO CHEESES DURING RIPENINGJournal of Sensory Studies, 2001
- The quality of sheep milk: a reviewAustralian Journal of Experimental Agriculture, 1997
- Fatty acid composition of the triglyceride and free fatty acid fractions in different cows-, ewes- and goats-milk cheesesZeitschrift für Lebensmittel-Untersuchung und Forschung, 1993
- Influence of Milk Somatic Cell Count and Milk Age on Cheese YieldJournal of Dairy Science, 1991
- Objective indices of cheese ripeningTrends in Food Science & Technology, 1990
- Effects of variations in somatic cell count on the rennet coagulation properties of milk and on the yield, composition and quality of Cheddar cheeseJournal of Dairy Research, 1986
- Lipoprotein Lipase Activity of Milk from Cows with Prolonged Subclinical MastitisJournal of Dairy Science, 1985
- Lipolytic Enzyme Activity of Macrophages in Bovine Mammary Gland SecretionsJournal of Dairy Science, 1985
- Rheological Evaluation of Maturing Cheddar CheeseJournal of Food Science, 1982
- Influence of elevated somatic cell count on casein distribution and cheese-makingJournal of Dairy Research, 1980