AIM: To evaluate the effects of intramammary infections (IMI) on somatic cell score (SCS) and milk yield in dairy ewes. METHODS: Monthly milk samples were collected from a flock of 202 Sarda sheep, over a period of 7 months, for bacteriological culture and measurement of somatic cell counts (SCC). During the same period, milk yield was measured daily using electronic milk meters connected to each half-udder cluster of the milking machine. SCC was transformed to SCS using a base-2 log transformation. One SCS is equivalent to a SCC of 25,000 cells/ml, and each increase of 1 in SCS is associated with doubling of the SCC. IMI was defined by the presence of five or more colonies of similar morphology isolated from a milk sample (500 cfu/ml). The effect of IMI on SCS and milk yield was assessed using a generalised estimating equation (GEE).

EFFECTS OF INTRAMAMMARY INFECTIONS ON SOMATIC CELL SCORE AND MILK YIELD IN SARDA SHEEP / Cuccuru, Cesare Luigi Antonio; Meloni, M.; Sala, E.; Scaccabarozzi, L.; Locatelli, C.; Moroni, P.; Bronzo, V.. - In: NEW ZEALAND VETERINARY JOURNAL. - ISSN 0048-0169. - 59:3(2011), pp. 128-131. [10.1080/00480169.2011.562862]

EFFECTS OF INTRAMAMMARY INFECTIONS ON SOMATIC CELL SCORE AND MILK YIELD IN SARDA SHEEP

CUCCURU, Cesare Luigi Antonio;
2011-01-01

Abstract

AIM: To evaluate the effects of intramammary infections (IMI) on somatic cell score (SCS) and milk yield in dairy ewes. METHODS: Monthly milk samples were collected from a flock of 202 Sarda sheep, over a period of 7 months, for bacteriological culture and measurement of somatic cell counts (SCC). During the same period, milk yield was measured daily using electronic milk meters connected to each half-udder cluster of the milking machine. SCC was transformed to SCS using a base-2 log transformation. One SCS is equivalent to a SCC of 25,000 cells/ml, and each increase of 1 in SCS is associated with doubling of the SCC. IMI was defined by the presence of five or more colonies of similar morphology isolated from a milk sample (500 cfu/ml). The effect of IMI on SCS and milk yield was assessed using a generalised estimating equation (GEE).
2011
EFFECTS OF INTRAMAMMARY INFECTIONS ON SOMATIC CELL SCORE AND MILK YIELD IN SARDA SHEEP / Cuccuru, Cesare Luigi Antonio; Meloni, M.; Sala, E.; Scaccabarozzi, L.; Locatelli, C.; Moroni, P.; Bronzo, V.. - In: NEW ZEALAND VETERINARY JOURNAL. - ISSN 0048-0169. - 59:3(2011), pp. 128-131. [10.1080/00480169.2011.562862]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/47024
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