TY - JOUR
T1 - Blood biochemical changes upon subclinical intramammary infection and inflammation in Holstein cattle
AU - Pegolo, S.
AU - Giannuzzi, D.
AU - Piccioli Cappelli, Fiorenzo
AU - Cattaneo, Luca
AU - Gianesella, M.
AU - Ruegg, P. L.
AU - Trevisi, Erminio
AU - Cecchinato, A.
PY - 2023
Y1 - 2023
N2 - The aim of this study was to investigate the associations between subclinical intramammary infection (IMI) from different pathogens combined with inflammation status and a set of blood biochemical traits including energy-related metabolites, indicators of liver function or hepatic damage, oxidative stress, inflammation, innate immunity, and mineral status in 349 lactating Holstein cows. Data were analyzed with a linear model including the following fixed class effects: days in milk, parity, herd, somatic cell count (SCC), bacteriological status (positive and negative), and the SCC x bacteriological status interaction. Several metabolites had significant associations with subclinical IMI or SCC. Increased SCC was associated with a linear decrease in cholesterol concentrations which ranged from -2% for the class >= 50,000 and < 200,000 cells/mL to -11% for the SCC class >= 400,000 cells/mL compared with the SCC class < 50,000 cells/mL. A positive bacteriological result was associated with an increase in bilirubin (+24%), paraoxonase (+11%), the ratio paraoxonase/ cholesterol (+9%), and advanced oxidation protein product concentration (+23%). Increased SCC were associated with a linear decrease in ferric reducing antioxidant power concentrations ranging from -3% for the class >= 50,000 and < 200,000 cells/mL to -9% for the SCC class >= 400,000 cells/mL (respect to the SCC class < 50,000 cells/mL). A positive bacteriological result was associated with an increase in haptoglobin concentrations (+19%). Increased SCC were also associated with a linear increase in haptoglobin concentrations, which ranged from +24% for the class >= 50,000 and < 200,000 cells/mL (0.31 g/L) to +82% for the SCC class >= 400,000 cells/mL (0.45 g/L), with respect to the SCC class < 50,000 cells/mL (0.25 g/L). Increased SCC were associated with a linear increase in ceruloplasmin concentrations (+15% for SCC >= 50,000 cells/mL). The observed changes in blood biochemical markers, mainly acute phase proteins and oxidative stress markers, suggest that cows with subclinical IMI may experience a systemic involvement.
AB - The aim of this study was to investigate the associations between subclinical intramammary infection (IMI) from different pathogens combined with inflammation status and a set of blood biochemical traits including energy-related metabolites, indicators of liver function or hepatic damage, oxidative stress, inflammation, innate immunity, and mineral status in 349 lactating Holstein cows. Data were analyzed with a linear model including the following fixed class effects: days in milk, parity, herd, somatic cell count (SCC), bacteriological status (positive and negative), and the SCC x bacteriological status interaction. Several metabolites had significant associations with subclinical IMI or SCC. Increased SCC was associated with a linear decrease in cholesterol concentrations which ranged from -2% for the class >= 50,000 and < 200,000 cells/mL to -11% for the SCC class >= 400,000 cells/mL compared with the SCC class < 50,000 cells/mL. A positive bacteriological result was associated with an increase in bilirubin (+24%), paraoxonase (+11%), the ratio paraoxonase/ cholesterol (+9%), and advanced oxidation protein product concentration (+23%). Increased SCC were associated with a linear decrease in ferric reducing antioxidant power concentrations ranging from -3% for the class >= 50,000 and < 200,000 cells/mL to -9% for the SCC class >= 400,000 cells/mL (respect to the SCC class < 50,000 cells/mL). A positive bacteriological result was associated with an increase in haptoglobin concentrations (+19%). Increased SCC were also associated with a linear increase in haptoglobin concentrations, which ranged from +24% for the class >= 50,000 and < 200,000 cells/mL (0.31 g/L) to +82% for the SCC class >= 400,000 cells/mL (0.45 g/L), with respect to the SCC class < 50,000 cells/mL (0.25 g/L). Increased SCC were associated with a linear increase in ceruloplasmin concentrations (+15% for SCC >= 50,000 cells/mL). The observed changes in blood biochemical markers, mainly acute phase proteins and oxidative stress markers, suggest that cows with subclinical IMI may experience a systemic involvement.
KW - bacteriological examination
KW - subclinical mastitis
KW - somatic cell count
KW - blood traits
KW - bacteriological examination
KW - subclinical mastitis
KW - somatic cell count
KW - blood traits
UR - http://hdl.handle.net/10807/258042
U2 - 10.3168/jds.2022-23155
DO - 10.3168/jds.2022-23155
M3 - Article
SN - 0022-0302
VL - 106
SP - 6539
EP - 6550
JO - Journal of Dairy Science
JF - Journal of Dairy Science
ER -