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Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth
Spring-calving multiparous Angus x Hereford cows were used to determine the efficacy of intramuscular treatment with oxytetracycline to reduce the incidence of mastitis-causing bacteria, decrease milk somatic cell counts (SCC), and increase calf growth. During 2 yr, milk samples were collected from...
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Published in: | Journal of animal science 2002-06, Vol.80 (6), p.1405-1412 |
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creator | Lents, C. A Wettemann, R. P Paape, M. J Vizcarra, J. A Looper, M. L Buchanan, D. S Lusby, K. S |
description | Spring-calving multiparous Angus x Hereford cows were used to determine the efficacy of intramuscular treatment with oxytetracycline to reduce the incidence of mastitis-causing bacteria, decrease milk somatic cell counts (SCC), and increase calf growth. During 2 yr, milk samples were collected from each quarter from a total of 319 cows at 8 to 14 d after calving and at weaning, to determine the presence of bacteria and SCC. A California mastitis test (CMT) was performed on milk from each quarter of each cow at the initial sample collection. Cows with a CMT score of 1, 2, or 3 in at least one quarter, were randomly assigned to receive either an intramuscular injection of oxytetracycline (n = 63) or the control vehicle (n = 60), and cows with a CMT score of 0 or trace in all four quarters were not treated (n = 196). Calf weights were determined at birth, early lactation, and weaning. The number of somatic cells in milk and the percentage of quarters that were infected increased as CMT score increased (P < 0.01). The presence of mastitis-causing bacteria at calving increased (P < 0.05) the incidence of infection at weaning. The presence of mastitis-causing bacteria at weaning was associated with increased SCC for quarters and average SCC for cows (P < 0.01). Average SCC per cow at weaning increased (P < 0.05) as the number of infected quarters per cow increased. Treatment did not alter (P > 0.10) the percentage of cows or quarters infected with mastitis-causing bacteria or SCC of cows or quarters at weaning. Average SCC per cow was negatively correlated (P < 0.05) with calf weights at early lactation, but not with weaning weights of calves. Treatment did not influence (P > 0.10) calf weights at early lactation or at weaning. Cows with one or more dry quarters after calving had calves that weighed less at early lactation and weaning than cows with four functional quarters (P < 0.01). Intramuscular oxytetracycline treatment of beef cows that had CMT scores of 1 or greater after calving did not reduce intramammary infection rates or increase calf weights at weaning. |
doi_str_mv | 10.2527/2002.8061405x |
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A ; Wettemann, R. P ; Paape, M. J ; Vizcarra, J. A ; Looper, M. L ; Buchanan, D. S ; Lusby, K. S</creator><creatorcontrib>Lents, C. A ; Wettemann, R. P ; Paape, M. J ; Vizcarra, J. A ; Looper, M. L ; Buchanan, D. S ; Lusby, K. S</creatorcontrib><description><![CDATA[Spring-calving multiparous Angus x Hereford cows were used to determine the efficacy of intramuscular treatment with oxytetracycline to reduce the incidence of mastitis-causing bacteria, decrease milk somatic cell counts (SCC), and increase calf growth. During 2 yr, milk samples were collected from each quarter from a total of 319 cows at 8 to 14 d after calving and at weaning, to determine the presence of bacteria and SCC. A California mastitis test (CMT) was performed on milk from each quarter of each cow at the initial sample collection. Cows with a CMT score of 1, 2, or 3 in at least one quarter, were randomly assigned to receive either an intramuscular injection of oxytetracycline (n = 63) or the control vehicle (n = 60), and cows with a CMT score of 0 or trace in all four quarters were not treated (n = 196). Calf weights were determined at birth, early lactation, and weaning. The number of somatic cells in milk and the percentage of quarters that were infected increased as CMT score increased (P < 0.01). The presence of mastitis-causing bacteria at calving increased (P < 0.05) the incidence of infection at weaning. The presence of mastitis-causing bacteria at weaning was associated with increased SCC for quarters and average SCC for cows (P < 0.01). Average SCC per cow at weaning increased (P < 0.05) as the number of infected quarters per cow increased. Treatment did not alter (P > 0.10) the percentage of cows or quarters infected with mastitis-causing bacteria or SCC of cows or quarters at weaning. Average SCC per cow was negatively correlated (P < 0.05) with calf weights at early lactation, but not with weaning weights of calves. Treatment did not influence (P > 0.10) calf weights at early lactation or at weaning. Cows with one or more dry quarters after calving had calves that weighed less at early lactation and weaning than cows with four functional quarters (P < 0.01). Intramuscular oxytetracycline treatment of beef cows that had CMT scores of 1 or greater after calving did not reduce intramammary infection rates or increase calf weights at weaning.]]></description><identifier>ISSN: 0021-8812</identifier><identifier>EISSN: 1525-3163</identifier><identifier>DOI: 10.2527/2002.8061405x</identifier><identifier>PMID: 12078719</identifier><language>eng</language><publisher>Savoy, IL: Am Soc Animal Sci</publisher><subject>Animal productions ; Animals ; Animals, Suckling - growth & development ; Anti-Bacterial Agents - administration & dosage ; Anti-Bacterial Agents - pharmacology ; Anti-Bacterial Agents - therapeutic use ; Biological and medical sciences ; Cattle ; Cell Count - veterinary ; Female ; Fundamental and applied biological sciences. Psychology ; Injections, Intramuscular - veterinary ; Mastitis, Bovine - drug therapy ; Mastitis, Bovine - physiopathology ; Milk - cytology ; Milk - microbiology ; Muscular system ; Oxytetracycline - administration & dosage ; Oxytetracycline - pharmacology ; Oxytetracycline - therapeutic use ; Physical growth ; Terrestrial animal productions ; Treatment Outcome ; Vertebrates ; Weaning ; Weight ; Weight Gain - drug effects</subject><ispartof>Journal of animal science, 2002-06, Vol.80 (6), p.1405-1412</ispartof><rights>2002 INIST-CNRS</rights><rights>Copyright American Society of Animal Science Jun 2002</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13709498$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/12078719$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lents, C. A</creatorcontrib><creatorcontrib>Wettemann, R. P</creatorcontrib><creatorcontrib>Paape, M. J</creatorcontrib><creatorcontrib>Vizcarra, J. A</creatorcontrib><creatorcontrib>Looper, M. L</creatorcontrib><creatorcontrib>Buchanan, D. S</creatorcontrib><creatorcontrib>Lusby, K. S</creatorcontrib><title>Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth</title><title>Journal of animal science</title><addtitle>J Anim Sci</addtitle><description><![CDATA[Spring-calving multiparous Angus x Hereford cows were used to determine the efficacy of intramuscular treatment with oxytetracycline to reduce the incidence of mastitis-causing bacteria, decrease milk somatic cell counts (SCC), and increase calf growth. During 2 yr, milk samples were collected from each quarter from a total of 319 cows at 8 to 14 d after calving and at weaning, to determine the presence of bacteria and SCC. A California mastitis test (CMT) was performed on milk from each quarter of each cow at the initial sample collection. Cows with a CMT score of 1, 2, or 3 in at least one quarter, were randomly assigned to receive either an intramuscular injection of oxytetracycline (n = 63) or the control vehicle (n = 60), and cows with a CMT score of 0 or trace in all four quarters were not treated (n = 196). Calf weights were determined at birth, early lactation, and weaning. The number of somatic cells in milk and the percentage of quarters that were infected increased as CMT score increased (P < 0.01). The presence of mastitis-causing bacteria at calving increased (P < 0.05) the incidence of infection at weaning. The presence of mastitis-causing bacteria at weaning was associated with increased SCC for quarters and average SCC for cows (P < 0.01). Average SCC per cow at weaning increased (P < 0.05) as the number of infected quarters per cow increased. Treatment did not alter (P > 0.10) the percentage of cows or quarters infected with mastitis-causing bacteria or SCC of cows or quarters at weaning. Average SCC per cow was negatively correlated (P < 0.05) with calf weights at early lactation, but not with weaning weights of calves. Treatment did not influence (P > 0.10) calf weights at early lactation or at weaning. Cows with one or more dry quarters after calving had calves that weighed less at early lactation and weaning than cows with four functional quarters (P < 0.01). Intramuscular oxytetracycline treatment of beef cows that had CMT scores of 1 or greater after calving did not reduce intramammary infection rates or increase calf weights at weaning.]]></description><subject>Animal productions</subject><subject>Animals</subject><subject>Animals, Suckling - growth & development</subject><subject>Anti-Bacterial Agents - administration & dosage</subject><subject>Anti-Bacterial Agents - pharmacology</subject><subject>Anti-Bacterial Agents - therapeutic use</subject><subject>Biological and medical sciences</subject><subject>Cattle</subject><subject>Cell Count - veterinary</subject><subject>Female</subject><subject>Fundamental and applied biological sciences. 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A</au><au>Wettemann, R. P</au><au>Paape, M. J</au><au>Vizcarra, J. A</au><au>Looper, M. L</au><au>Buchanan, D. S</au><au>Lusby, K. S</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth</atitle><jtitle>Journal of animal science</jtitle><addtitle>J Anim Sci</addtitle><date>2002-06-01</date><risdate>2002</risdate><volume>80</volume><issue>6</issue><spage>1405</spage><epage>1412</epage><pages>1405-1412</pages><issn>0021-8812</issn><eissn>1525-3163</eissn><abstract><![CDATA[Spring-calving multiparous Angus x Hereford cows were used to determine the efficacy of intramuscular treatment with oxytetracycline to reduce the incidence of mastitis-causing bacteria, decrease milk somatic cell counts (SCC), and increase calf growth. During 2 yr, milk samples were collected from each quarter from a total of 319 cows at 8 to 14 d after calving and at weaning, to determine the presence of bacteria and SCC. A California mastitis test (CMT) was performed on milk from each quarter of each cow at the initial sample collection. Cows with a CMT score of 1, 2, or 3 in at least one quarter, were randomly assigned to receive either an intramuscular injection of oxytetracycline (n = 63) or the control vehicle (n = 60), and cows with a CMT score of 0 or trace in all four quarters were not treated (n = 196). Calf weights were determined at birth, early lactation, and weaning. The number of somatic cells in milk and the percentage of quarters that were infected increased as CMT score increased (P < 0.01). The presence of mastitis-causing bacteria at calving increased (P < 0.05) the incidence of infection at weaning. The presence of mastitis-causing bacteria at weaning was associated with increased SCC for quarters and average SCC for cows (P < 0.01). Average SCC per cow at weaning increased (P < 0.05) as the number of infected quarters per cow increased. Treatment did not alter (P > 0.10) the percentage of cows or quarters infected with mastitis-causing bacteria or SCC of cows or quarters at weaning. Average SCC per cow was negatively correlated (P < 0.05) with calf weights at early lactation, but not with weaning weights of calves. Treatment did not influence (P > 0.10) calf weights at early lactation or at weaning. Cows with one or more dry quarters after calving had calves that weighed less at early lactation and weaning than cows with four functional quarters (P < 0.01). Intramuscular oxytetracycline treatment of beef cows that had CMT scores of 1 or greater after calving did not reduce intramammary infection rates or increase calf weights at weaning.]]></abstract><cop>Savoy, IL</cop><pub>Am Soc Animal Sci</pub><pmid>12078719</pmid><doi>10.2527/2002.8061405x</doi><tpages>8</tpages></addata></record> |
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subjects | Animal productions Animals Animals, Suckling - growth & development Anti-Bacterial Agents - administration & dosage Anti-Bacterial Agents - pharmacology Anti-Bacterial Agents - therapeutic use Biological and medical sciences Cattle Cell Count - veterinary Female Fundamental and applied biological sciences. Psychology Injections, Intramuscular - veterinary Mastitis, Bovine - drug therapy Mastitis, Bovine - physiopathology Milk - cytology Milk - microbiology Muscular system Oxytetracycline - administration & dosage Oxytetracycline - pharmacology Oxytetracycline - therapeutic use Physical growth Terrestrial animal productions Treatment Outcome Vertebrates Weaning Weight Weight Gain - drug effects |
title | Efficacy of intramuscular treatment of beef cows with oxytetracycline to reduce mastitis and to increase calf growth |
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