Association between differential somatic cell count and California Mastitis Test results in Holstein cattle

Abstract

Graphical Abstract Summary: The left panel shows the estimated California Mastitis Test (CMT) scores as a function of somatic cell score (SCS) and macrophage proportions. Because the SCS is a logarithmic conversion of somatic cell counts (SCC), the same CMT reaction may represent hugely varied SCC values depending on the macrophage proportions. As shown in the 2 right panels, elevated macrophage proportions have been identified in the resolution of mastitis and some subclinical mastitis cases. In such situations, the interpretation of the CMT scores requires more consideration.

Intramammary Infusion of Micronised Purified Flavonoid Fraction (MPFF) in Mastitis-Diagnosed Dairy Cows Naturally Infected by Staphylococcus spp. in the Late Lactation

“…The glandular secretion was monitored once weekly before milking using the CMT [ 27 , 29 , 52 ]. The CMT results were scored on a scale of 0, trace, 1, 2, and 3 based on the appearance of the liquid fraction mixed, where 0 = no thickening, trace = slight thickening, 1 = thickening but not gel formation, 2 = slow thickening with gel formation, and 3 = rapid gel formation.…”

“…The California Mastitis Test (CMT) provides an immediate result and is and inexpensive method [ 27 ]. A positive CMT is considered indicative of an increase in somatic cells and suggests the presence of intramammary infection [ 28 , 29 ] using a scale of 0, trace, 1, 2, or 3 depending on the mastitis severity [ 30 , 31 ]. Similarly, the somatic cell count (SCC) has traditionally been used to define intramammary infection [ 28 ].…”

Combining Nucleotide Sequence Variants and Transcript Levels of Immune and Antioxidant Markers for Selection and Improvement of Mastitis Resistance in Dromedary Camels

“…Each she-camel underwent a thorough health assessment, including body temperature, pulse rates, respiration rates, and udder inspection before having raw milk. According to a prior investigation, all milk samples were tested for mastitis using the California mastitis test (CMT) [33]. The first group, known as the healthy group, was made up of camels with normal body temperatures, pulse rates, and respiration rates, as well as being clinically healthy.…”

“…Even though camel mastitis has been extensively studied, all prior investigations on the condition concentrated on its aetiology, epidemiology, and therapy [2,31]. Mastitis can be prevented by using genetic marker-assisted selection for mastitis features because it produces greater homogeneity and more discriminating between phenotypes than traditional selection, which is lacking in information about the immunological and antioxidant genetic polymorphisms and expression profile of indicators associated with this disease [32,33]. The candidate gene approach has been used to verify mastitis resistance/susceptibility in livestock; nonetheless, details on immune and antioxidant biomarker polymorphisms and expression profiles for mastitis incidence in dromedary camels are scarcely reported.…”

Uso de beta-glucano subcutâneo no controle da mastite bovina

“…Esta reação pode ser pontuada em uma ordem escala categórica, permitindo que o número de células (ou seja, CCS) no leite seja estimado. Como uma elevação de CCS (> 200.000 células/mL) é um forte indicação de mastite(Huang; Kusaba, 2022).De acordo comRibeiro et al (2016) o CMT deve ser realizado antecedente à ordenha e auxilia no diagnóstico da mastite subclínica, realizando uma estimativa do número de células somáticas do leite oriundo de cada quarto mamário. Por ser um teste simples e eficaz, é o mais utilizado para o diagnóstico, sendo recomendado que seja realizado mensalmente em todas as vacas em lactação.…”