Increased susceptibility to intramammary infection following removal of teat canal keratin
Influence of teat canal keratin on susceptibility to intramammary infection was investigated in lactating Jersey cows. In each of two replicate trials, keratin was removed from the left teats of 20 cows immediately before milking. Immediately after milking, all teats were exposed to bacterial challe...
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| Veröffentlicht in: | Journal of dairy science 1992-08, Vol.75 (8), p.2126-2130 |
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| creator | CAPUCO, AV BRIGHT, SA PANKEY, JW WOOD, DL MILLER, RH BITMAN, J |
| description | Influence of teat canal keratin on susceptibility to intramammary infection was investigated in lactating Jersey cows. In each of two replicate trials, keratin was removed from the left teats of 20 cows immediately before milking. Immediately after milking, all teats were exposed to bacterial challenge by immersion in a suspension of Streptococcus agalactiae (5 X 10(7) cfu/ml). Bacterial challenge was repeated after the next four milkings. Foremilk samples were obtained for 8 d after keratin removal to determine infection status. A mammary quarter was classified as infected based solely upon the bacteriological criteria outlined by the National Mastitis Council. The rate of infection in quarters from which keratin was removed was greater than that in control quarters. Infection rates were 26.3% for keratin-removed quarters and 8.3% for control quarters in trial 1 and 13.5 and 0%, respectively, in trial 2. When more stringent criteria (recovery of > 100 cfu of S. agalactiae/ml in three or more successive milk samples and a SCC of > 10(6)) were used to identify a subset of infections that were clearly intramammary, infection rates were 9.3% for keratin-removed quarters and 1.4% for control quarters. Thus, partial removal of keratin from the teat canal compromised the ability of the teat to prevent passage of bacterial pathogens from the external environment into the mammary gland. |
| doi_str_mv | 10.3168/jds.S0022-0302(92)77972-7 |
| format | Article |
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Tsentralen Veterinarnomeditsinski Institut "Prof. d-r G. Pavlov". Veterinaren Fakultet ; Milk Secretion and Mastitis Laboratory, USDA, ARS, Beltsville, MD</creatorcontrib><description>Influence of teat canal keratin on susceptibility to intramammary infection was investigated in lactating Jersey cows. In each of two replicate trials, keratin was removed from the left teats of 20 cows immediately before milking. Immediately after milking, all teats were exposed to bacterial challenge by immersion in a suspension of Streptococcus agalactiae (5 X 10(7) cfu/ml). Bacterial challenge was repeated after the next four milkings. Foremilk samples were obtained for 8 d after keratin removal to determine infection status. A mammary quarter was classified as infected based solely upon the bacteriological criteria outlined by the National Mastitis Council. The rate of infection in quarters from which keratin was removed was greater than that in control quarters. Infection rates were 26.3% for keratin-removed quarters and 8.3% for control quarters in trial 1 and 13.5 and 0%, respectively, in trial 2. When more stringent criteria (recovery of > 100 cfu of S. agalactiae/ml in three or more successive milk samples and a SCC of > 10(6)) were used to identify a subset of infections that were clearly intramammary, infection rates were 9.3% for keratin-removed quarters and 1.4% for control quarters. Thus, partial removal of keratin from the teat canal compromised the ability of the teat to prevent passage of bacterial pathogens from the external environment into the mammary gland.</description><identifier>ISSN: 0022-0302</identifier><identifier>EISSN: 1525-3198</identifier><identifier>DOI: 10.3168/jds.S0022-0302(92)77972-7</identifier><identifier>PMID: 1383301</identifier><language>eng</language><publisher>NEW YORK: Elsevier</publisher><subject>Agriculture ; Agriculture, Dairy & Animal Science ; Animals ; bovine mastitis ; Cattle ; dairy cows ; disease resistance ; Disease Susceptibility ; experimentacion in vivo ; experimentation in vivo ; Female ; Food Science & Technology ; Immunity, Innate - physiology ; in vivo experimentation ; infeccion ; infection ; keratin ; keratine ; Keratins - physiology ; Life Sciences & Biomedicine ; Mammary Glands, Animal - immunology ; mammite bovine ; mastitis bovina ; Mastitis, Bovine - immunology ; Mastitis, Bovine - microbiology ; pezon ; queratinas ; resistance aux maladies ; resistencia a la enfermedad ; Science & Technology ; Streptococcal Infections - immunology ; Streptococcus agalactiae ; teats ; trayon ; vacas lecheras ; vache laitiere</subject><ispartof>Journal of dairy science, 1992-08, Vol.75 (8), p.2126-2130</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>true</woscitedreferencessubscribed><woscitedreferencescount>47</woscitedreferencescount><woscitedreferencesoriginalsourcerecordid>wosA1992JH34200009</woscitedreferencesoriginalsourcerecordid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,781,785,27197,27874,27929,27930</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/1383301$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>CAPUCO, AV</creatorcontrib><creatorcontrib>BRIGHT, SA</creatorcontrib><creatorcontrib>PANKEY, JW</creatorcontrib><creatorcontrib>WOOD, DL</creatorcontrib><creatorcontrib>MILLER, RH</creatorcontrib><creatorcontrib>BITMAN, J</creatorcontrib><creatorcontrib>Institut po Biologiya i Imunologiya na Razmnozhavaneto i Razvitieto na Organizmite - B"lgarska Akademiya na Naukite, Sofia (Bulgaria). Tsentralen Veterinarnomeditsinski Institut "Prof. d-r G. Pavlov". Veterinaren Fakultet</creatorcontrib><creatorcontrib>Milk Secretion and Mastitis Laboratory, USDA, ARS, Beltsville, MD</creatorcontrib><title>Increased susceptibility to intramammary infection following removal of teat canal keratin</title><title>Journal of dairy science</title><addtitle>J DAIRY SCI</addtitle><addtitle>J Dairy Sci</addtitle><description>Influence of teat canal keratin on susceptibility to intramammary infection was investigated in lactating Jersey cows. In each of two replicate trials, keratin was removed from the left teats of 20 cows immediately before milking. Immediately after milking, all teats were exposed to bacterial challenge by immersion in a suspension of Streptococcus agalactiae (5 X 10(7) cfu/ml). Bacterial challenge was repeated after the next four milkings. Foremilk samples were obtained for 8 d after keratin removal to determine infection status. A mammary quarter was classified as infected based solely upon the bacteriological criteria outlined by the National Mastitis Council. The rate of infection in quarters from which keratin was removed was greater than that in control quarters. Infection rates were 26.3% for keratin-removed quarters and 8.3% for control quarters in trial 1 and 13.5 and 0%, respectively, in trial 2. When more stringent criteria (recovery of > 100 cfu of S. agalactiae/ml in three or more successive milk samples and a SCC of > 10(6)) were used to identify a subset of infections that were clearly intramammary, infection rates were 9.3% for keratin-removed quarters and 1.4% for control quarters. Thus, partial removal of keratin from the teat canal compromised the ability of the teat to prevent passage of bacterial pathogens from the external environment into the mammary gland.</description><subject>Agriculture</subject><subject>Agriculture, Dairy & Animal Science</subject><subject>Animals</subject><subject>bovine mastitis</subject><subject>Cattle</subject><subject>dairy cows</subject><subject>disease resistance</subject><subject>Disease Susceptibility</subject><subject>experimentacion in vivo</subject><subject>experimentation in vivo</subject><subject>Female</subject><subject>Food Science & Technology</subject><subject>Immunity, Innate - physiology</subject><subject>in vivo experimentation</subject><subject>infeccion</subject><subject>infection</subject><subject>keratin</subject><subject>keratine</subject><subject>Keratins - physiology</subject><subject>Life Sciences & Biomedicine</subject><subject>Mammary Glands, Animal - immunology</subject><subject>mammite bovine</subject><subject>mastitis bovina</subject><subject>Mastitis, Bovine - immunology</subject><subject>Mastitis, Bovine - microbiology</subject><subject>pezon</subject><subject>queratinas</subject><subject>resistance aux maladies</subject><subject>resistencia a la enfermedad</subject><subject>Science & Technology</subject><subject>Streptococcal Infections - immunology</subject><subject>Streptococcus agalactiae</subject><subject>teats</subject><subject>trayon</subject><subject>vacas lecheras</subject><subject>vache laitiere</subject><issn>0022-0302</issn><issn>1525-3198</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1992</creationdate><recordtype>article</recordtype><sourceid>EZCTM</sourceid><sourceid>EIF</sourceid><sourceid>K30</sourceid><recordid>eNqN0c9rFTEQB_AgSn2t_gnKiiCKbE0mu9nkWB61Pyh4qL14WbLZSclzN3kmWUv_e1Peo4debC5hmM8E5htCPjB6zJmQ3zZjOr6mFKCmnMJnBV-6TnVQdy_IirXQ1pwp-ZKsHslrcpjSppQMaHtADhiXnFO2Ir8uvImoE45VWpLBbXaDm1y-r3KonM9Rz3qedbwvhUWTXfCVDdMU7py_rSLO4a-eqmCrjDpXRvtS_caos_NvyCurp4Rv9_cRufl--nN9Xl_9OLtYn1zVFoDmmqtmkNyKtu1MM6IcpdAtWN1Q3QnGrFRGSyZxFAZRGipHDTCCZQNHqkDxI_Jp9-42hj8LptzPrmwyTdpjWFLfcWCtEv-HTDSKKxAFfnwCN2GJZbViZNdRIRsmi3q3V8sw49hvo3sIqt9nW_py17_DIdhkHHqDj-qEKQWX57wBWo5au6wfwl2Hxecy-vX5o0W_32mrQ69vo0v9zXUxvPy3lFzwf0cmqDE</recordid><startdate>19920801</startdate><enddate>19920801</enddate><creator>CAPUCO, AV</creator><creator>BRIGHT, SA</creator><creator>PANKEY, JW</creator><creator>WOOD, DL</creator><creator>MILLER, RH</creator><creator>BITMAN, J</creator><general>Elsevier</general><general>American Dairy Science Association</general><scope>FBQ</scope><scope>BLEPL</scope><scope>DTL</scope><scope>EZCTM</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7WH</scope><scope>K30</scope><scope>PAAUG</scope><scope>PAWHS</scope><scope>PAWZZ</scope><scope>PAXOH</scope><scope>PBHAV</scope><scope>PBQSW</scope><scope>PBYQZ</scope><scope>PCIWU</scope><scope>PCMID</scope><scope>PCZJX</scope><scope>PDGRG</scope><scope>PDWWI</scope><scope>PETMR</scope><scope>PFVGT</scope><scope>PGXDX</scope><scope>PIHIL</scope><scope>PISVA</scope><scope>PJCTQ</scope><scope>PJTMS</scope><scope>PLCHJ</scope><scope>PMHAD</scope><scope>PNQDJ</scope><scope>POUND</scope><scope>PPLAD</scope><scope>PQAPC</scope><scope>PQCAN</scope><scope>PQCMW</scope><scope>PQEME</scope><scope>PQHKH</scope><scope>PQMID</scope><scope>PQNCT</scope><scope>PQNET</scope><scope>PQSCT</scope><scope>PQSET</scope><scope>PSVJG</scope><scope>PVMQY</scope><scope>PZGFC</scope><scope>7QL</scope><scope>C1K</scope><scope>7X8</scope></search><sort><creationdate>19920801</creationdate><title>Increased susceptibility to intramammary infection following removal of teat canal keratin</title><author>CAPUCO, AV ; BRIGHT, SA ; PANKEY, JW ; WOOD, DL ; MILLER, RH ; BITMAN, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-f220t-394b83f6557c4de8d86a52fa40a7611f89ca818ed6cee8c08da22d2f1b3e09293</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1992</creationdate><topic>Agriculture</topic><topic>Agriculture, Dairy & Animal Science</topic><topic>Animals</topic><topic>bovine mastitis</topic><topic>Cattle</topic><topic>dairy cows</topic><topic>disease resistance</topic><topic>Disease Susceptibility</topic><topic>experimentacion in vivo</topic><topic>experimentation in vivo</topic><topic>Female</topic><topic>Food Science & Technology</topic><topic>Immunity, Innate - physiology</topic><topic>in vivo experimentation</topic><topic>infeccion</topic><topic>infection</topic><topic>keratin</topic><topic>keratine</topic><topic>Keratins - physiology</topic><topic>Life Sciences & Biomedicine</topic><topic>Mammary Glands, Animal - immunology</topic><topic>mammite bovine</topic><topic>mastitis bovina</topic><topic>Mastitis, Bovine - immunology</topic><topic>Mastitis, Bovine - microbiology</topic><topic>pezon</topic><topic>queratinas</topic><topic>resistance aux maladies</topic><topic>resistencia a la enfermedad</topic><topic>Science & Technology</topic><topic>Streptococcal Infections - immunology</topic><topic>Streptococcus agalactiae</topic><topic>teats</topic><topic>trayon</topic><topic>vacas lecheras</topic><topic>vache laitiere</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>CAPUCO, AV</creatorcontrib><creatorcontrib>BRIGHT, SA</creatorcontrib><creatorcontrib>PANKEY, JW</creatorcontrib><creatorcontrib>WOOD, DL</creatorcontrib><creatorcontrib>MILLER, RH</creatorcontrib><creatorcontrib>BITMAN, J</creatorcontrib><creatorcontrib>Institut po Biologiya i Imunologiya na Razmnozhavaneto i Razvitieto na Organizmite - B"lgarska Akademiya na Naukite, Sofia (Bulgaria). Tsentralen Veterinarnomeditsinski Institut "Prof. d-r G. Pavlov". 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Tsentralen Veterinarnomeditsinski Institut "Prof. d-r G. Pavlov". Veterinaren Fakultet</aucorp><aucorp>Milk Secretion and Mastitis Laboratory, USDA, ARS, Beltsville, MD</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Increased susceptibility to intramammary infection following removal of teat canal keratin</atitle><jtitle>Journal of dairy science</jtitle><stitle>J DAIRY SCI</stitle><addtitle>J Dairy Sci</addtitle><date>1992-08-01</date><risdate>1992</risdate><volume>75</volume><issue>8</issue><spage>2126</spage><epage>2130</epage><pages>2126-2130</pages><issn>0022-0302</issn><eissn>1525-3198</eissn><abstract>Influence of teat canal keratin on susceptibility to intramammary infection was investigated in lactating Jersey cows. In each of two replicate trials, keratin was removed from the left teats of 20 cows immediately before milking. Immediately after milking, all teats were exposed to bacterial challenge by immersion in a suspension of Streptococcus agalactiae (5 X 10(7) cfu/ml). Bacterial challenge was repeated after the next four milkings. Foremilk samples were obtained for 8 d after keratin removal to determine infection status. A mammary quarter was classified as infected based solely upon the bacteriological criteria outlined by the National Mastitis Council. The rate of infection in quarters from which keratin was removed was greater than that in control quarters. Infection rates were 26.3% for keratin-removed quarters and 8.3% for control quarters in trial 1 and 13.5 and 0%, respectively, in trial 2. When more stringent criteria (recovery of > 100 cfu of S. agalactiae/ml in three or more successive milk samples and a SCC of > 10(6)) were used to identify a subset of infections that were clearly intramammary, infection rates were 9.3% for keratin-removed quarters and 1.4% for control quarters. Thus, partial removal of keratin from the teat canal compromised the ability of the teat to prevent passage of bacterial pathogens from the external environment into the mammary gland.</abstract><cop>NEW YORK</cop><pub>Elsevier</pub><pmid>1383301</pmid><doi>10.3168/jds.S0022-0302(92)77972-7</doi><tpages>5</tpages></addata></record> |
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| ispartof | Journal of dairy science, 1992-08, Vol.75 (8), p.2126-2130 |
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| language | eng |
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| source | Web of Science - Science Citation Index Expanded - 1992<img src="https://exlibris-pub.s3.amazonaws.com/fromwos-v2.jpg" />; MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Periodicals Index Online; ScienceDirect Journals (5 years ago - present) |
| subjects | Agriculture Agriculture, Dairy & Animal Science Animals bovine mastitis Cattle dairy cows disease resistance Disease Susceptibility experimentacion in vivo experimentation in vivo Female Food Science & Technology Immunity, Innate - physiology in vivo experimentation infeccion infection keratin keratine Keratins - physiology Life Sciences & Biomedicine Mammary Glands, Animal - immunology mammite bovine mastitis bovina Mastitis, Bovine - immunology Mastitis, Bovine - microbiology pezon queratinas resistance aux maladies resistencia a la enfermedad Science & Technology Streptococcal Infections - immunology Streptococcus agalactiae teats trayon vacas lecheras vache laitiere |
| title | Increased susceptibility to intramammary infection following removal of teat canal keratin |
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