Reliability in somatic cell count measurement of clinical mastitis milk using DeLaval cell counter.

  title={Reliability in somatic cell count measurement of clinical mastitis milk using DeLaval cell counter.},
  author={Kazuhiro Kawai and Tomohito Hayashi and Yoshio Kiku and Tomoyuki Chiba and Hajime Nagahata and Hidetoshi Higuchi and Tetsu Obayashi and Seigo Itoh and Ken Onda and Sachiko Arai and Reiichiro Sato and Toshio Oshida},
  journal={Animal science journal = Nihon chikusan Gakkaiho},
  volume={84 12},
Somatic cell counts (SCC) measurements are typically performed using quantitative methods, such as the Breed method (Breed) and the Fossomatic method (FSCC). The DeLaval cell counter (DCC) developed recently is a quantitative somatic cell counter with a low initial cost and superior portability. However, since the DCC was specifically developed for measuring SCC of ≤ 4 × 10(6) cells/mL milk from bulk tanks or individual cows, its reliability for estimating SCC that exceed this concentration has… 
Technical note: Evaluation of a commercial on-farm milk leukocyte differential tester to identify subclinical mastitis cases in dairy cows.
The on-farm milk leukocyte differential tester was precise but not overall accurate for total cell counts; it had high specificity and accuracy for diagnosis compared with a standard diagnostic tool.
Evaluation and Comparison of 2 On‐Farm Tests for Estimating Somatic Cell Count in Quarter Milk Samples from Lactating Dairy Cattle
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Evaluation of 3 esterase tests for the diagnosis of subclinical mastitis at dry-off and freshening in dairy cattle.
There does not appear to be a persuasive reason to select the PortaSCC tests over the traditional CMT for diagnosing SCM and IMI, and clinically useful tests typically have an AUC <0.80 and κ >0.6.
Ability of milk pH to predict subclinical mastitis and intramammary infection in quarters from lactating dairy cattle.
It is concluded that milk pH does not provide a clinically useful method for diagnosing SCM or IMI in dairy cattle because of poor performance of the pH meter and Multistix strips.
Evaluation of hand‐held sodium, potassium, calcium, and electrical conductivity meters for diagnosing subclinical mastitis and intramammary infection in dairy cattle
Cisternal milk Na concentration provided the most accurate method for identifying quarters with SCM or IMI and portable ion‐selective meters were not sufficiently predictive of SCM and IMI to be recommended as clinically useful diagnostic tests.
Exfoliation rate of mammary epithelial cells in milk on bovine mastitis caused by Staphylococcus aureus is associated with bacterial load.
The increasing MEC exfoliation rate in milk from mastitis udders caused by S. aureus may contribute to reduced milk yield.
A large-scale study of indicators of sub-clinical mastitis in dairy cattle by attribute weighting analysis of milk composition features: highlighting the predictive power of lactose and electrical conductivity
It is shown that the concentration of lactose in milk can be used as a strong indicator of SCM, for the first time, using attribute weighted modelling.
Acute phase proteins, proteomics and metabolomics in the diagnosis of bovine mastitis
The value of APP, milk proteomics and metabolomics in bovine mastitis diagnosis was shown and there is a general moderately-high level of APP in milk immediately following parturition which drops a few days later in healthy milk.
Examination of the microbiota of normal cow milk using MinIONTM nanopore sequencing
It is clarified that the composition of the normal milk microbiota in this herd was related to the SCC, and the possibility of variations in bacterial genera in thenormal milk microbiota between the low- and high-SCC groups was raised.
Technological interventions and advances in the diagnosis of intramammary infections in animals with emphasis on bovine population—a review
This review summarizes the various diagnostic tests available for detection of mastitis including diagnosis through general and specific technological interventions and advances.


Evaluation of the overall accuracy of the DeLaval cell counter for somatic cell counts in ovine milk.
The DeLaval cell counter was determined to be accurate when analyzing diluted ovine milk based on comparison with the SCC reference methods.
Effective use of dairy herd improvement somatic cell counts in mastitis control.
  • J. Reneau
  • Medicine
    Journal of dairy science
  • 1986
Somatic cell count linear score of 5 (283,000) appears to be a good choice of threshold for mastitis control applications and a greater understanding of the nonbacteriological factors affecting somatic cell count is needed so that relative thresholds could be used to improve the clarity of somaticcell count interpretation.
The incidence and aetiology of clinical bovine mastitis on 14 farms in Northland, New Zealand
A higher incidence of staphylococcal clinical mastitis on dairy farms from Northland than has been reported in other regions of New Zealand is demonstrated.
Invited review: Mastitis in dairy heifers: nature of the disease, potential impact, prevention, and control.
In conclusion, heifer mastitis can affect the profitability of dairy farming because of a potential long-term negative effect on udder health and milk production and an associated culling risk, specifically when major pathogens are involved.
Factors affecting milk somatic cells and their role in health of the bovine mammary gland.
In the future, genetic gains for milk quality and mastitis resistance may be made by removing bulls from breeding programs when their daughters are predisposed to high SCC.
Physiology of mastitis and factors affecting somatic cell counts.
  • R. Harmon
  • Biology, Medicine
    Journal of dairy science
  • 1994
Except for normal diurnal variation, few factors other than infection status have a significant impact on milk SCC.
Evaluation of the California mastitis test to detect an intramammary infection with a major pathogen in early lactation dairy cows.
The purpose of this study was to evaluate the usefulness of the California mastitis test (CMT) to detect an intramammary infection caused by a major mastitis pathogen in early lactation cows. The