Title: Milk amyloid A (MAA) concentration and somatic cell count (SCC) in the diagnosis of bovine mastitis
Abstract:One-hundred-thirty-one dairy cows from 5 herds in the Central Valley of California were selected based on somatic cell count and mastitis records, days in milk in the current lactation and lactation g...One-hundred-thirty-one dairy cows from 5 herds in the Central Valley of California were selected based on somatic cell count and mastitis records, days in milk in the current lactation and lactation group to ensure an adequate spectrum of cases. All cows were clinically examined and milk samples were obtained from 2 contra-lateral quarters. From cows with clinical signs of mastitis, the affected and the contra-lateral quarter were sampled. The milk was submitted for microbiology, somatic cell count (SCC) and milk amyloid A (MAA) testing. If clinical signs were present or culturing revealed mastitis agents, the quarter was classified as mastitic. If no clinical signs were present and the culture was negative, the quarter was classified as healthy. If multiple cultures were present, the sample was classified as contaminated. We found that the SCC and MAA-concentration were not correlated (n=254, R2 = 0.08). ROC-curves demonstrated an area under the curve (AUC) of 0.80 for MAA and 0.77 for SCC (n=230). These areas were not statistically different. This indicates that despite no overall difference in diagnostic performance, the SCC and MAA may have different diagnostic potentials that could depend on factors such as causative agents or degree of tissue damageRead More
Publication Year: 2005
Publication Date: 2005-10-24
Language: en
Type: book-chapter
Indexed In: ['crossref']
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