Effect of intramammary infection by <b><i>Staphylococcus caprae</i></b> on somatic cell counts and milk composition in goats

Sánchez, Antonio; Fernández, Carlos; Contreras, A.; Luengo, C.; Rubert, Joaquín

doi:10.1017/s0022029902005496

Cited by 20 publications

(14 citation statements)

References 7 publications

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“…This was attributed to a selective immunosuppression due to altered macrophage function during CAEV infection. In seropositive goats, an increase of SCC was mostly reported as far as bacteriologically uninfected halves are concerned [82,105,127,130]. This could be related to the larger number of macrophages in the milk of CAEV contaminated goats [82].…”

Section: Lentiviral Variation Factors Of Somatic Cell Countsmentioning

confidence: 98%

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Mastitis of dairy small ruminants

et al. 2003

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-Staphylococci are the main aetiological agents of small ruminants intramammary infections (IMI), the more frequent isolates being S. aureus in clinical cases and coagulase negative species in subclinical IMI. The clinical IMI, whose annual incidence is usually lower than 5%, mainly occur at the beginning of machine milking and during the first third of lactation. These features constitute small ruminant peculiarities compared to dairy cattle. Small ruminant mastitis is generally a chronic and contagious infection: the primary sources are mammary and cutaneous carriages, and spreading mainly occurs during milking. Somatic cell counts (SCC) represent a valuable tool for prevalence assessment and screening, but predictive values are better in ewes than in goats. Prevention is most often based on milking machine management, sanitation and annual control, and milking technique optimisation. Elimination mainly relies on culling animals exhibiting clinical, chronic and recurrent IMI, and on drying-off intramammary antibiotherapy; this treatment allows a good efficacy and may be used selectively by targeting infected udders only. Heritability values for lactation mean SCC scores are between 0.11 and 0.15. Effective inclusion of ewe's mastitis resistance in the breeding goal has recently been implemented in France following experimental and large scale estimations of genetic parameters for SCC scores.ewe / goat / mastitis / somatic cell count / epizootiology

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Section: Lentiviral Variation Factors Of Somatic Cell Countsmentioning

confidence: 98%

“…Listeria monocytogenes and Salmonella spp. IMI are very rare but important; these organisms can cause chronic and subclinical IMI [2,8,14,17,21,28,29,38,40,68,70,75,80,109,115,129,130,143,144].…”

Section: Clinical Mastitismentioning

confidence: 99%

Mastitis of dairy small ruminants

et al. 2003

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“…Intramammary infection (IMI) raises milk somatic cell count (SCC) and reduces milk yield and milk quality in dairy cows (Harmon, 1994) and sheep (Watson & Buswell, 1984), but in goats this interrelationship is less clear (Haenlein & Hinckley, 1995;Sanchez et al 2002). In goats, involution tends to be spontaneous and is associated with an increase of SCC independently of IMI, which confounds the interrelationship between IMI and milk yield (Wilson et al 1995;Zeng & Escobar, 1996;Foschino et al 2002).…”

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confidence: 99%

Effect of subclinical intramammary infection on somatic cell counts, NAGase activity and gross composition of goats' milk

Leitner¹,

Merin²,

Silanikove

et al. 2004

Journal of Dairy Research

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The study was aimed at identifying the pathogens causing subclinical udder infections in representative Israeli dairy goat herds and determining their effect on milk quality. Five hundred goats in ten flocks of various breeds and crossbreeds were surveyed. Of the 500 goats, 13 . 4% were in their first lactation, 36 . 4 % were in their second lactation and 50 . 2% were in their third or higher lactation. Percentages of udder halves with subclinical intramammary infection in the flocks ranged from 35 to 71 %. The effect of the bacteriological infection on somatic cells count (SCC) was significant (P <0 . 001). Various species of coagulase-negative staphylococci (CNS), mainly Staphylococcus caprae and Staphylococcus epidermidis, were the main pathogens in infected udder halves. Lactation number did not significantly influence either infection rate of udder halves or SCC, although the percentage of udder halves with no bacteriological findings was higher at the first lactation than at the third lactation. Milk composition (fat, protein and lactose) varied among flocks, with lower mean total protein in uninfected halves than in infected ones and higher lactose in uninfected than infected halves.

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“…In other studies, however, higher fat concentration was found in infected glands than in uninfected ones [20] or related to high levels of SCC [6]. Positive [18,20,21]; negative [22,23] or no relationship [9] was also described between protein content and SCC or intramammary infection. The variation of milk contents could be also associated with a dilution or concentration effect in variable milk volumes similarly to SCC, as suggested, for example, Fuertes et al [21].…”

Section: Introductionmentioning

confidence: 76%

“…Similarly, Baudry et al [7] in French dairy goat flocks found losses in milk yield ranged from 7.9% and 16.9% when a low SCC level was compared with other two high SCC levels. Other authors [8], however, found attenuated losses in milk yield (0.8-2.3%) associated with medium-high intramammary infection prevalences in a given herd, while others [9,10] did not find significant differences in milk yield between infected and uninfected goats. Koop et al [11] show that milk yield losses caused by subclinical udder infections are limited in goats and that SCC cannot be used to estimate the magnitude of these losses.…”

Section: Introductionmentioning

confidence: 89%

Variation in Milk Yield, Contents and Incomes According to Somatic Cell Count in a Large Dairy Goat Population

Pleguezuelos

Fern²,

Fuente³

et al. 2015

J Adv Dairy Res

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Between 2009 and 2014, 758,382 monthly test-day records were obtained from 65,056 Murciano-Granadina goats in 132 Spanish dairy flocks. Variables measured were somatic cell count (SCC), milk yield and fat and protein percentages; means were 5.78log 10 cells/ml, 2.04 L/day, 5.37% and 3.67%, respectively. Significant effects of year, herd test date, season, parity, month of lactation, litter size and covariables milk yield, fat and protein contents were evidenced on SCC. The regression slopes were negative for milk yield an d positive for fat and protein content, thus pointing out that high SCC in milk were associated with low milk yield and high contents. A second ANOVA was built to evaluate the evolution of test-day variables as SCC level increased within lactation. The percentages estimated in losses of milk yield for SCC levels 1 million cells/ml, 2 million cells/ml, 3 million cells/ml and >7 million cells/ml were 11.4%, 19.5%, 24.2% and 35.7%, respectively. Milk contents gains were also quantified. Milk incomes per goat and day (according to current payment system) revealed important economic losses (from 9.5% to 31.6%) for abovementioned SCC levels. Results emphasize the importance of SCC as a limiting factor for milk incomes in dairy goats.

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Effect of intramammary infection by Staphylococcus caprae on somatic cell counts and milk composition in goats

Cited by 20 publications

References 7 publications

Mastitis of dairy small ruminants

Mastitis of dairy small ruminants

Effect of subclinical intramammary infection on somatic cell counts, NAGase activity and gross composition of goats' milk

Variation in Milk Yield, Contents and Incomes According to Somatic Cell Count in a Large Dairy Goat Population

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