Evaluation of Methods for the Diagnosis of Streptococcus agalactiae Intramammary Infections in Dairy Cattle
The sensitivity, specificity, and positive and negative predictive values were compared for six methods of collecting or culturing milk samples for the diagnosis of chronic Streptococcus agalactiae intramammary infection. Cows in four dairy herds were cultured three times in 2 wk to determine infect...
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| Veröffentlicht in: | Journal of dairy science 1991-05, Vol.74 (5), p.1521-1526 |
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| container_title | Journal of dairy science |
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| creator | Dinsmore, R. Page English, Paul B. Gonzalez, Ruben N. Sears, Philip M. Schulte, Hal F. |
| description | The sensitivity, specificity, and positive and negative predictive values were compared for six methods of collecting or culturing milk samples for the diagnosis of chronic Streptococcus agalactiae intramammary infection. Cows in four dairy herds were cultured three times in 2 wk to determine infection status. At the second sample period, individual quarter and composite milk samples were taken before and immediately after milking, and two volumes of milk from the composite samples were streaked on culture plates. The Sensitivity, specificity, and predictive values for these cultures ranged between 95 and 100% for all diagnostic methods, and no significant differences were found between methods. The results indicate that when either quarter or composite samples are collected before or immediately after milking, 95 to 100% of S. agalactiae culture-positive cows will be infected with S. agalactiae in herds with a prevalence of S. agalactiae between 35 and 55%. A similar proportion of culture-negative cows will be uninfected. |
| doi_str_mv | 10.3168/jds.S0022-0302(91)78312-4 |
| format | Article |
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Page ; English, Paul B. ; Gonzalez, Ruben N. ; Sears, Philip M. ; Schulte, Hal F.</creator><creatorcontrib>Dinsmore, R. Page ; English, Paul B. ; Gonzalez, Ruben N. ; Sears, Philip M. ; Schulte, Hal F.</creatorcontrib><description>The sensitivity, specificity, and positive and negative predictive values were compared for six methods of collecting or culturing milk samples for the diagnosis of chronic Streptococcus agalactiae intramammary infection. Cows in four dairy herds were cultured three times in 2 wk to determine infection status. At the second sample period, individual quarter and composite milk samples were taken before and immediately after milking, and two volumes of milk from the composite samples were streaked on culture plates. The Sensitivity, specificity, and predictive values for these cultures ranged between 95 and 100% for all diagnostic methods, and no significant differences were found between methods. The results indicate that when either quarter or composite samples are collected before or immediately after milking, 95 to 100% of S. agalactiae culture-positive cows will be infected with S. agalactiae in herds with a prevalence of S. agalactiae between 35 and 55%. A similar proportion of culture-negative cows will be uninfected.</description><identifier>ISSN: 0022-0302</identifier><identifier>EISSN: 1525-3198</identifier><identifier>DOI: 10.3168/jds.S0022-0302(91)78312-4</identifier><identifier>PMID: 1880260</identifier><identifier>CODEN: JDSCAE</identifier><language>eng</language><publisher>Savoy, IL: Elsevier Inc</publisher><subject>Animals ; Biological and medical sciences ; BOVIN LAITIER ; Cattle ; culture ; DIAGNOSTIC ; DIAGNOSTICO ; ECHANTILLONNAGE ; Female ; Food industries ; Food microbiology ; Fundamental and applied biological sciences. Psychology ; GANADO DE LECHE ; GLANDE MAMMAIRE ; GLANDULAS MAMARIAS ; MAMMITE BOVINE ; mastitis ; MASTITIS BOVINA ; Mastitis, Bovine - diagnosis ; Milk - microbiology ; MUESTREO ; Predictive Value of Tests ; Specimen Handling - veterinary ; Streptococcal Infections - diagnosis ; Streptococcal Infections - veterinary ; STREPTOCOCCUS AGALACTIAE ; Streptococcus agalactiae - isolation & purification ; TECHNIQUE DE CULTURE ; TECNICAS DE CULTIVO</subject><ispartof>Journal of dairy science, 1991-05, Vol.74 (5), p.1521-1526</ispartof><rights>1991 American Dairy Science Association</rights><rights>1992 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c561t-5c2f5106677a35e96f9714cb15ee3c9e115637eec855d4da7fdf2afc3a51ef253</citedby><cites>FETCH-LOGICAL-c561t-5c2f5106677a35e96f9714cb15ee3c9e115637eec855d4da7fdf2afc3a51ef253</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.3168/jds.S0022-0302(91)78312-4$$EHTML$$P50$$Gelsevier$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,3549,27868,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=5280932$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/1880260$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Dinsmore, R. Page</creatorcontrib><creatorcontrib>English, Paul B.</creatorcontrib><creatorcontrib>Gonzalez, Ruben N.</creatorcontrib><creatorcontrib>Sears, Philip M.</creatorcontrib><creatorcontrib>Schulte, Hal F.</creatorcontrib><title>Evaluation of Methods for the Diagnosis of Streptococcus agalactiae Intramammary Infections in Dairy Cattle</title><title>Journal of dairy science</title><addtitle>J Dairy Sci</addtitle><description>The sensitivity, specificity, and positive and negative predictive values were compared for six methods of collecting or culturing milk samples for the diagnosis of chronic Streptococcus agalactiae intramammary infection. Cows in four dairy herds were cultured three times in 2 wk to determine infection status. At the second sample period, individual quarter and composite milk samples were taken before and immediately after milking, and two volumes of milk from the composite samples were streaked on culture plates. The Sensitivity, specificity, and predictive values for these cultures ranged between 95 and 100% for all diagnostic methods, and no significant differences were found between methods. The results indicate that when either quarter or composite samples are collected before or immediately after milking, 95 to 100% of S. agalactiae culture-positive cows will be infected with S. agalactiae in herds with a prevalence of S. agalactiae between 35 and 55%. A similar proportion of culture-negative cows will be uninfected.</description><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>BOVIN LAITIER</subject><subject>Cattle</subject><subject>culture</subject><subject>DIAGNOSTIC</subject><subject>DIAGNOSTICO</subject><subject>ECHANTILLONNAGE</subject><subject>Female</subject><subject>Food industries</subject><subject>Food microbiology</subject><subject>Fundamental and applied biological sciences. 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Page</au><au>English, Paul B.</au><au>Gonzalez, Ruben N.</au><au>Sears, Philip M.</au><au>Schulte, Hal F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evaluation of Methods for the Diagnosis of Streptococcus agalactiae Intramammary Infections in Dairy Cattle</atitle><jtitle>Journal of dairy science</jtitle><addtitle>J Dairy Sci</addtitle><date>1991-05-01</date><risdate>1991</risdate><volume>74</volume><issue>5</issue><spage>1521</spage><epage>1526</epage><pages>1521-1526</pages><issn>0022-0302</issn><eissn>1525-3198</eissn><coden>JDSCAE</coden><abstract>The sensitivity, specificity, and positive and negative predictive values were compared for six methods of collecting or culturing milk samples for the diagnosis of chronic Streptococcus agalactiae intramammary infection. Cows in four dairy herds were cultured three times in 2 wk to determine infection status. At the second sample period, individual quarter and composite milk samples were taken before and immediately after milking, and two volumes of milk from the composite samples were streaked on culture plates. The Sensitivity, specificity, and predictive values for these cultures ranged between 95 and 100% for all diagnostic methods, and no significant differences were found between methods. The results indicate that when either quarter or composite samples are collected before or immediately after milking, 95 to 100% of S. agalactiae culture-positive cows will be infected with S. agalactiae in herds with a prevalence of S. agalactiae between 35 and 55%. A similar proportion of culture-negative cows will be uninfected.</abstract><cop>Savoy, IL</cop><pub>Elsevier Inc</pub><pmid>1880260</pmid><doi>10.3168/jds.S0022-0302(91)78312-4</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
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| ispartof | Journal of dairy science, 1991-05, Vol.74 (5), p.1521-1526 |
| issn | 0022-0302 1525-3198 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_72064085 |
| source | MEDLINE; Periodicals Index Online; ScienceDirect Journals (5 years ago - present); EZB-FREE-00999 freely available EZB journals |
| subjects | Animals Biological and medical sciences BOVIN LAITIER Cattle culture DIAGNOSTIC DIAGNOSTICO ECHANTILLONNAGE Female Food industries Food microbiology Fundamental and applied biological sciences. Psychology GANADO DE LECHE GLANDE MAMMAIRE GLANDULAS MAMARIAS MAMMITE BOVINE mastitis MASTITIS BOVINA Mastitis, Bovine - diagnosis Milk - microbiology MUESTREO Predictive Value of Tests Specimen Handling - veterinary Streptococcal Infections - diagnosis Streptococcal Infections - veterinary STREPTOCOCCUS AGALACTIAE Streptococcus agalactiae - isolation & purification TECHNIQUE DE CULTURE TECNICAS DE CULTIVO |
| title | Evaluation of Methods for the Diagnosis of Streptococcus agalactiae Intramammary Infections in Dairy Cattle |
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