Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"dry cow"”.
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Detection of Antibiotic Residues in Bovine Milk
… or infused into the udder of the cow, can be secreted into the milk. It is for this reason that withdrawal times for milk from cows treated with antibiotic preparations have been determined. The withdrawal time is that period following treatment with antibiotics for the antibiotic …
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Management of Length of Lactation and Dry Period to Increase Net Farm Income in a Simulated Dairy Herd
… length of lactation relative to length of dry period in a dairy herd. It created weekly production for individual cows in a typical herd. Cows were dried off early if they were producing below a designated daily milk yield. They were replaced with fresh cows to produce more daily milk and …
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Investigating the effect of yeast and mineral dietary supplements during the periparturient period on the production, physical health, and innate immune system of dairy cows
The periparturient period of a dairy cow is defined as the time when the cow goes from a state of near maintenance in late gestation to a rapid on-set of metabolic adaptation to meet the needs of lactation production. This homeorhetic phase requires the coordination of numerous hormones and tissues …
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Effects of feeding moderate-energy high-forage diets with reduced DCAD for twenty-one or forty-two days prepartum on mineral homeostasis and postpartum performance
… milk fever and hypocalcemia in the transition cow are not completely understood. Extended negative dietary cation-anion difference (DCAD) feeding in the prepartum diet would allow producers to utilize a one group dry cow pen; reducing social stress on cows while providing protection against …
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Rumen biohydrogenation of polyunsaturated fatty acids in high quality pasture
… and C18:2 fatty acids observed in milk from cows fed high-quality pasture. In a survey of milk and forage samples collected from commercial dairy farms in Canterbury, the results of pasture analysis indicated that levels of water-soluble carbohydrates and crude protein were highest in spring …
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Dye Marking of Antibiotics Used in Treatment of Mastitis in Dry and Lactating Cows
… is the one major disease affecting dairy cows; considerable direct and indirect economic losses can be attributed to mastitis (6). Treatment of mastitis with antibiotic preparations will alleviate most disease symptoms. Problems may arise when cows treated with antibiotics have their milk …
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Relationship of management factors to differences in profitability among Virginia dairy farms
… contrast to parlors. Parlor type had no effect. Dry cow treatment reduced mastitis. A count of six recommended milking practices showed an annual increase of 246 kg milk. per cow per practice implemented. Optimal ages of first calving were found for average production, net cash income per cow and …
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Prevention of bovine mastitis
Mastitis in dairy cows has for many years received attention from Veterinary scientists, more so than any other if the common diseases of cattle. The less occasioned by infection of the mammary gland has cost the dairy industry an enormous amount through loss of milk, use of antibiotics and culling …
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Intramammary infection in rapidly growing, non-lactating mammary glands
… (IMI) are common in non-lactating heifer and dry cow mammary glands and occur during periods of appreciable mammary growth and development. The presence of these infections is expected to negatively impact mammary growth and development but has yet to be investigated. The works reported here …
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Exploring milk management strategies for improved food safety and health outcomes in the neonate
… mainly antibiotic administration during dry cow therapy, on bovine colostrum. Secondly, the impact of processing techniques utilized in the milk bank setting on donor human milk. The results demonstrate factors which may affect the quality of milk and detail potential strategies to …
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Strategies to Decrease Incidence of Fatty Liver in Dairy Cows
Holstein cows were used to explore aspects of dietary strategies to decrease lipid accumulation in the liver after parturition. In experiment 1, 75 cows (30 primiparous) were fed controlled-energy, high-forage (CEHF) diets or were overfed energy (OVERFED) from dry-off to parturition, or CEHF for …
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Photoperiod and Temperature-Humidity Index during the Dry-Period Impact Colostrum and Milk Production in Dairy Cattle
… to affect colostrum production, 23% of dairy cows are still producing inadequate volume or quality of colostrum, which causes calf death and poor performance. Therefore, the objectives of this dissertation are to investigate factors that affect colostrum production and methods to improve …
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Dry period plane of energy and periparturient health condition: Effects on production and metabolic responses
Overconsumption of energy during the dry period has been linked to metabolic disorders during early lactation. Controlled energy, high fiber diets during the dry period have been shown to decrease postpartal body lipid mobilization, concentrations of non-esterified fatty acids (NEFA) and …
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REDUCING ANTIMICROBIAL RESISTANCE RISKS AND ANTIBIOTIC USAGE IN DAIRY FARMING: MICROBIOLOGICAL INSIGHTS AND ALTERNATIVE STRATEGIES
… milk microbiota of Alpine dairy goats during the dry and early lactation periods. The study found that the somatic cell count was decreasing over time at T3 compared to T1 after treatment with cefazolin. However, cefazolin treatment did not significantly impact alpha and beta diversity. The third …
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The effects of feeding a negative dietary cation-anion difference diet at two dietary calcium inclusion rates to close up dry cows on the subsequent lactation uterine health and fertility
… of dietary Ca to feed with a close-up dry cow negative DCAD diet and the effects on the subsequent uterine health, circulating inflammatory blood metabolites, ovulation dynamics, and fertility. Multiparous Holstein cows (n = 76) were enrolled at 50 days before expected calving date and …
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Abundance of Antibiotic Resistance Genes in Feces Following Prophylactic and Therapeutic Intramammary Antibiotic Infusion in Dairy Cattle
… and relative abundance of ARGs in dairy cow feces. For prophylactic treatment using cephapirin benzathine, nineteen end-of-lactation cows were used. Treatment cows (n = 9) received cephapirin benzathine as an intramammary infusion prior to dry-off, and control cows (n =10) received no …
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Exploring early-life microbiome transfer and therapeutic applications in bovines and humans
… were performed on samples from 72 dairy cows, given dry cow therapy (n=48) or naturally dried off (n=24). The impact of farm level variables (location and parity) were also assessed. Phages carrying multidrug resistance genes (smeS, lfrA, kdpE and baeS) were identified. Antibiotic …
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USE OF ON-FARM DATA AND MILK LEUCOCYTE COMPONENTS FOR MONITORING THE HEALTH OF DAIRY COWS
The aim of this PhD project was monitoring cow health and welfare, using on-farm data and leucocytes components in milk. For this reason, the investigation focused on the two main diseases of dairy cows: mastitis and lameness. Critical aspects are linked with these diseases and some of them were …