Consensus recommendations on calf- and herd-level passive immunity in dairy calves in the United States
Passive immunity in calves is evaluated or quantified by measuring serum or plasma IgG or serum total protein within the first 7 d of age. While these measurements inform about circulating concentrations of this important protein, they are also a proxy for evaluating all of the additional benefits o...
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| Veröffentlicht in: | Journal of dairy science 2020-08, Vol.103 (8), p.7611-7624 |
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| creator | Lombard, J. Urie, N. Garry, F. Godden, S. Quigley, J. Earleywine, T. McGuirk, S. Moore, D. Branan, M. Chamorro, M. Smith, G. Shivley, C. Catherman, D. Haines, D. Heinrichs, A.J. James, R. Maas, J. Sterner, K. |
| description | Passive immunity in calves is evaluated or quantified by measuring serum or plasma IgG or serum total protein within the first 7 d of age. While these measurements inform about circulating concentrations of this important protein, they are also a proxy for evaluating all of the additional benefits of colostral ingestion. The current individual calf standard for categorizing dairy calves with successful passive transfer or failure of passive transfer of immunity are based on serum IgG concentrations of ≥10 and |
| doi_str_mv | 10.3168/jds.2019-17955 |
| format | Article |
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While these measurements inform about circulating concentrations of this important protein, they are also a proxy for evaluating all of the additional benefits of colostral ingestion. The current individual calf standard for categorizing dairy calves with successful passive transfer or failure of passive transfer of immunity are based on serum IgG concentrations of ≥10 and <10 g/L, respectively. This cutoff was based on higher mortality rates in calves with serum IgG <10 g/L. Mortality rates have decreased since 1991, but the percentage of calves with morbidity events has not changed over the same time period. Almost 90% of calves sampled in the USDA National Animal Health Monitoring System's Dairy 2014 study had successful passive immunity based on the dichotomous standard. Based on these observations, a group of calf experts were assembled to evaluate current data and determine if changes to the passive immunity standards were necessary to reduce morbidity and possibly mortality. In addition to the USDA National Animal Health Monitoring System's Dairy 2014 study, other peer-reviewed publications and personal experience were used to identify and evaluate potential standards. Four options were evaluated based on the observed statistical differences between categories. The proposed standard includes 4 serum IgG categories: excellent, good, fair, and poor with serum IgG levels of ≥25.0, 18.0–24.9, 10.0–17.9, and <10 g/L, respectively. At the herd level, we propose an achievable standard of >40, 30, 20, and <10% of calves in the excellent, good, fair, and poor categories, respectively. Because serum IgG concentrations are not practical for on-farm implementation, we provide corresponding serum total protein and %Brix values for use on farm. With one-third of heifer calves in 2014 already meeting the goal of ≥25 g/L serum IgG at 24 h of life, this achievable standard will require more refinement of colostrum management programs on many dairy farms. Implementation of the proposed standard should further reduce the risk of both mortality and morbidity in preweaned dairy calves, improving overall calf health and welfare.</description><identifier>ISSN: 0022-0302</identifier><identifier>EISSN: 1525-3198</identifier><identifier>DOI: 10.3168/jds.2019-17955</identifier><identifier>PMID: 32448583</identifier><language>eng</language><publisher>United States: Elsevier Inc</publisher><subject>Animals ; Animals, Newborn - immunology ; Cattle - immunology ; colostrum ; Colostrum - immunology ; Consensus ; Female ; Immunity, Herd ; Immunoglobulin G - blood ; Male ; morbidity ; passive immunity ; Pregnancy ; United States</subject><ispartof>Journal of dairy science, 2020-08, Vol.103 (8), p.7611-7624</ispartof><rights>2020 American Dairy Science Association</rights><rights>Copyright © 2020 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c450t-144d3f55321d1eff7cdcf1f592c6c339ba6663846fbf5efceea36fb00e8320f43</citedby><cites>FETCH-LOGICAL-c450t-144d3f55321d1eff7cdcf1f592c6c339ba6663846fbf5efceea36fb00e8320f43</cites><orcidid>0000-0001-5700-8810 ; 0000-0001-5207-6494 ; 0000-0002-5288-7307 ; 0000-0002-5662-3704 ; 0000-0002-4438-0039 ; 0000-0002-3433-4338 ; 0000-0002-9880-4626 ; 0000-0003-4465-4797 ; 0000-0001-5217-473X ; 0000-0001-8400-8963 ; 0000-0002-8018-713X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.3168/jds.2019-17955$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,781,785,3551,27926,27927,45997</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32448583$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lombard, J.</creatorcontrib><creatorcontrib>Urie, N.</creatorcontrib><creatorcontrib>Garry, F.</creatorcontrib><creatorcontrib>Godden, S.</creatorcontrib><creatorcontrib>Quigley, J.</creatorcontrib><creatorcontrib>Earleywine, T.</creatorcontrib><creatorcontrib>McGuirk, S.</creatorcontrib><creatorcontrib>Moore, D.</creatorcontrib><creatorcontrib>Branan, M.</creatorcontrib><creatorcontrib>Chamorro, M.</creatorcontrib><creatorcontrib>Smith, G.</creatorcontrib><creatorcontrib>Shivley, C.</creatorcontrib><creatorcontrib>Catherman, D.</creatorcontrib><creatorcontrib>Haines, D.</creatorcontrib><creatorcontrib>Heinrichs, A.J.</creatorcontrib><creatorcontrib>James, R.</creatorcontrib><creatorcontrib>Maas, J.</creatorcontrib><creatorcontrib>Sterner, K.</creatorcontrib><title>Consensus recommendations on calf- and herd-level passive immunity in dairy calves in the United States</title><title>Journal of dairy science</title><addtitle>J Dairy Sci</addtitle><description>Passive immunity in calves is evaluated or quantified by measuring serum or plasma IgG or serum total protein within the first 7 d of age. While these measurements inform about circulating concentrations of this important protein, they are also a proxy for evaluating all of the additional benefits of colostral ingestion. The current individual calf standard for categorizing dairy calves with successful passive transfer or failure of passive transfer of immunity are based on serum IgG concentrations of ≥10 and <10 g/L, respectively. This cutoff was based on higher mortality rates in calves with serum IgG <10 g/L. Mortality rates have decreased since 1991, but the percentage of calves with morbidity events has not changed over the same time period. Almost 90% of calves sampled in the USDA National Animal Health Monitoring System's Dairy 2014 study had successful passive immunity based on the dichotomous standard. Based on these observations, a group of calf experts were assembled to evaluate current data and determine if changes to the passive immunity standards were necessary to reduce morbidity and possibly mortality. In addition to the USDA National Animal Health Monitoring System's Dairy 2014 study, other peer-reviewed publications and personal experience were used to identify and evaluate potential standards. Four options were evaluated based on the observed statistical differences between categories. The proposed standard includes 4 serum IgG categories: excellent, good, fair, and poor with serum IgG levels of ≥25.0, 18.0–24.9, 10.0–17.9, and <10 g/L, respectively. At the herd level, we propose an achievable standard of >40, 30, 20, and <10% of calves in the excellent, good, fair, and poor categories, respectively. Because serum IgG concentrations are not practical for on-farm implementation, we provide corresponding serum total protein and %Brix values for use on farm. With one-third of heifer calves in 2014 already meeting the goal of ≥25 g/L serum IgG at 24 h of life, this achievable standard will require more refinement of colostrum management programs on many dairy farms. Implementation of the proposed standard should further reduce the risk of both mortality and morbidity in preweaned dairy calves, improving overall calf health and welfare.</description><subject>Animals</subject><subject>Animals, Newborn - immunology</subject><subject>Cattle - immunology</subject><subject>colostrum</subject><subject>Colostrum - immunology</subject><subject>Consensus</subject><subject>Female</subject><subject>Immunity, Herd</subject><subject>Immunoglobulin G - blood</subject><subject>Male</subject><subject>morbidity</subject><subject>passive immunity</subject><subject>Pregnancy</subject><subject>United States</subject><issn>0022-0302</issn><issn>1525-3198</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kDlPAzEQRi0EgnC0lMglzQYf6z1KFHFJSBRAbTn2GIx2vcGzGyn_HocAHZX9zTx_kh8h55zNJa-aqw-Hc8F4W_C6VWqPzLgSqpC8bfbJjDEhCiaZOCLHiB85csHUITmSoiwb1cgZeVsMESHihDSBHfoeojNjyEM6RGpN5wtqoqPvkFzRwRo6ujKIYQ009P0Uw7ihIVJnQtps8TXgNo_vQF_zEhx9Hs0IeEoOvOkQzn7OE_J6e_OyuC8en-4eFtePhS0VGwtelk56paTgjoP3tXXWc69aYSsrZbs0VVXJpqz80ivwFsDIfGcMGimYL-UJudz1rtLwOQGOug9ooetMhGFCLUpWqVpVdZ3R-Q61aUBM4PUqhd6kjeZMb-XqLFdv5epvufnBxU_3tOzB_eG_NjPQ7ADIP1wHSBptgGjBhSx31G4I_3V_Ac7widM</recordid><startdate>202008</startdate><enddate>202008</enddate><creator>Lombard, J.</creator><creator>Urie, N.</creator><creator>Garry, F.</creator><creator>Godden, S.</creator><creator>Quigley, J.</creator><creator>Earleywine, T.</creator><creator>McGuirk, S.</creator><creator>Moore, D.</creator><creator>Branan, M.</creator><creator>Chamorro, M.</creator><creator>Smith, G.</creator><creator>Shivley, C.</creator><creator>Catherman, D.</creator><creator>Haines, D.</creator><creator>Heinrichs, A.J.</creator><creator>James, R.</creator><creator>Maas, J.</creator><creator>Sterner, K.</creator><general>Elsevier Inc</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0001-5700-8810</orcidid><orcidid>https://orcid.org/0000-0001-5207-6494</orcidid><orcidid>https://orcid.org/0000-0002-5288-7307</orcidid><orcidid>https://orcid.org/0000-0002-5662-3704</orcidid><orcidid>https://orcid.org/0000-0002-4438-0039</orcidid><orcidid>https://orcid.org/0000-0002-3433-4338</orcidid><orcidid>https://orcid.org/0000-0002-9880-4626</orcidid><orcidid>https://orcid.org/0000-0003-4465-4797</orcidid><orcidid>https://orcid.org/0000-0001-5217-473X</orcidid><orcidid>https://orcid.org/0000-0001-8400-8963</orcidid><orcidid>https://orcid.org/0000-0002-8018-713X</orcidid></search><sort><creationdate>202008</creationdate><title>Consensus recommendations on calf- and herd-level passive immunity in dairy calves in the United States</title><author>Lombard, J. ; 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While these measurements inform about circulating concentrations of this important protein, they are also a proxy for evaluating all of the additional benefits of colostral ingestion. The current individual calf standard for categorizing dairy calves with successful passive transfer or failure of passive transfer of immunity are based on serum IgG concentrations of ≥10 and <10 g/L, respectively. This cutoff was based on higher mortality rates in calves with serum IgG <10 g/L. Mortality rates have decreased since 1991, but the percentage of calves with morbidity events has not changed over the same time period. Almost 90% of calves sampled in the USDA National Animal Health Monitoring System's Dairy 2014 study had successful passive immunity based on the dichotomous standard. Based on these observations, a group of calf experts were assembled to evaluate current data and determine if changes to the passive immunity standards were necessary to reduce morbidity and possibly mortality. In addition to the USDA National Animal Health Monitoring System's Dairy 2014 study, other peer-reviewed publications and personal experience were used to identify and evaluate potential standards. Four options were evaluated based on the observed statistical differences between categories. The proposed standard includes 4 serum IgG categories: excellent, good, fair, and poor with serum IgG levels of ≥25.0, 18.0–24.9, 10.0–17.9, and <10 g/L, respectively. At the herd level, we propose an achievable standard of >40, 30, 20, and <10% of calves in the excellent, good, fair, and poor categories, respectively. Because serum IgG concentrations are not practical for on-farm implementation, we provide corresponding serum total protein and %Brix values for use on farm. With one-third of heifer calves in 2014 already meeting the goal of ≥25 g/L serum IgG at 24 h of life, this achievable standard will require more refinement of colostrum management programs on many dairy farms. Implementation of the proposed standard should further reduce the risk of both mortality and morbidity in preweaned dairy calves, improving overall calf health and welfare.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>32448583</pmid><doi>10.3168/jds.2019-17955</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0001-5700-8810</orcidid><orcidid>https://orcid.org/0000-0001-5207-6494</orcidid><orcidid>https://orcid.org/0000-0002-5288-7307</orcidid><orcidid>https://orcid.org/0000-0002-5662-3704</orcidid><orcidid>https://orcid.org/0000-0002-4438-0039</orcidid><orcidid>https://orcid.org/0000-0002-3433-4338</orcidid><orcidid>https://orcid.org/0000-0002-9880-4626</orcidid><orcidid>https://orcid.org/0000-0003-4465-4797</orcidid><orcidid>https://orcid.org/0000-0001-5217-473X</orcidid><orcidid>https://orcid.org/0000-0001-8400-8963</orcidid><orcidid>https://orcid.org/0000-0002-8018-713X</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Animals Animals, Newborn - immunology Cattle - immunology colostrum Colostrum - immunology Consensus Female Immunity, Herd Immunoglobulin G - blood Male morbidity passive immunity Pregnancy United States |
| title | Consensus recommendations on calf- and herd-level passive immunity in dairy calves in the United States |
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