<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0377-9424</journal-id>
<journal-title><![CDATA[Agronomía Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Costarricense]]></abbrev-journal-title>
<issn>0377-9424</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica. Colegio de Ingenieros y Agrónomos. Ministerio de Agricultura y Ganadería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0377-94242016000200007</article-id>
<article-id pub-id-type="doi">10.15517/rac.v40i2.27346</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de factores genéticos y ambientales sobre el recuento de células somáticas en ganado lechero de Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of genetic and environmental factors on somatic cell count of dairy cattle from Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mora]]></surname>
<given-names><![CDATA[María Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[Bernardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero]]></surname>
<given-names><![CDATA[Juan José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>CR</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2016</year>
</pub-date>
<volume>40</volume>
<numero>2</numero>
<fpage>7</fpage>
<lpage>18</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242016000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242016000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242016000200007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[ResumenEl estudio evaluó el efecto de factores genéticos y ambientales sobre el Score de Células Somáticas [SCS= log2 (RCS/100 000)+3] en ganado lechero de Costa Rica. Se analizaron 198 685 registros diarios, provenientes de 43 535 lactancias, 23 749 vacas lecheras, 237 hatos y 3 grupos raciales. Se utilizó un modelo animal mixto para evaluar efectos fijos de zona, hato dentro de zona, raza, número de lactancia, mes/ año de registro, periodo de lactancia y la covariable de producción de leche diaria; también para efectos aleatorios de ambiente permanente, hato×semental y vaca. Se calcularon la heredabilidad (h2) y repetibilidad (r) para el Recuento de Células Somáticas (SCS), así como los valores de cría (BLUP) y confiabilidad para los individuos en la población. El promedio de SCS fue 3,30 (DE=1,87) todos los efectos fijos, significativos. Entre zonas, SCS varió desde 3,4 (bh-p) a 3,7 (bmh-p). Para hatos dentro de zona, el SCS osciló entre 1,6 y 5,5. El SCS aumentó desde 2,7 en primera lactancia hasta 4,0 para lactancias &#8805;6. El SCS fue mayor en Enero (3,6) y menor en Abril (3,4). Se observó un patrón descendente no lineal en SCS desde el 2004 (4,3) hasta el 2015 (3,3) y un patrón no lineal de SCS a lo largo de la lactancia, que inició en 3,7 para disminuir hasta 3,1 al día 60 posparto, mientras que aumentó 3,9 al día 365. Se detectó una reducción de 0,051 en SCS por cada aumento de 1 kg en producción diaria de leche. Los valores de h2 y r fueron 0,08 (DE=0,008) y 0,33 (DE=0,004), respectivamente. La confiabilidad de los BLUP en vacas y toros fue de 0,40 (DE=0,16) y 0,44 (DE=0,20), respectivamente. Estos resultados son útiles para un mejor control de SCS a nivel de hato, basado en el manejo preventivo de grupos más propensos, la optimización del descarte y la selección de sementales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[AbstractThe study evaluated the effect of genetic and environmental factors on the Score of Somatic Cell Count [SCS = log2 (SCC/100 000)+3] in Costa Rica dairy cattle. A total of 198 685 daily records from 43 535 lactations, 23 749 cows, 237 herds and 3 breeds were analyzed. A mixed animal model was assessed with zone, herd within zone, breed, number of lactation, month/year or recording, lactation period and daily milk yield as fixed effects; and permanent environment, herd×sire and cow as random effects. Heritability (h2 ) and repeatability (r) indices for SCS were estimated. Breeding values and reliabilities were estimated for all individuals in the population. The average value of SCS was 3.30 (SD=1.87). All fixed effects were significant. SCS among zones ranged from 3.4 (bh-p) to 3.7 (bmh-p). For herds within zone, SCS ranged from 1.6 to 5.5. SCS increased from 2.7 in first lactation to 4.0 for lactation &#8805;6. SCS was higher in January (3.6) and lower in April (3.4). A consistent downward trend was observed in SCS from year 2004 (4.3) to 2015 (3.3). A nonlinear pattern was observed in SCS throughout lactation, starting at 3.7, with a marked decrease to a minimum of 3.1 around day 60 postpartum, and a progressive increase to a maximum of 3.9 around day 365 postpartum. A reduction of 0.051 in SCS was observed for each increase of 1 kg in daily milk production. Values of h2 and r for SCS were 0.08 (SD=0.008) and 0.33 (SD=0.004), respectively. Breeding values ranged from -1 to +1. Reliabilities of breeding values for cows and bulls were 0.40 (SD=0.16) and 0.44 (SD=0.20), respectively. These results can be used to improve SCS at the herd level, based on prevention in groups under higher risk, optimization of cow culling strategies and improved sire selection.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Recuento de células somáticas]]></kwd>
<kwd lng="es"><![CDATA[heredabilidad]]></kwd>
<kwd lng="es"><![CDATA[salud de la ubre]]></kwd>
<kwd lng="es"><![CDATA[vacas lecheras]]></kwd>
<kwd lng="en"><![CDATA[Somatic cell count]]></kwd>
<kwd lng="en"><![CDATA[heritability]]></kwd>
<kwd lng="en"><![CDATA[udder health]]></kwd>
<kwd lng="en"><![CDATA[dairy cows]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimates of correlations among yield traits and somatic cell score with different models to adjust for bovine somatotropin effects on Holstein dairy cows]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Al-Seaf]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Keown]]></surname>
<given-names><![CDATA[JF]]></given-names>
</name>
<name>
<surname><![CDATA[Van Vleck]]></surname>
<given-names><![CDATA[LD.]]></given-names>
</name>
</person-group>
<source><![CDATA[Genetics and Molecular Research]]></source>
<year>2007</year>
<volume>6</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>67-78</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A Study of Somatic Cell Counts in the Milk of Holstein-Friesian Cows Managed in Mediterranean Climatic Conditions]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Atakan]]></surname>
<given-names><![CDATA[K.O.Ç]]></given-names>
</name>
</person-group>
<source><![CDATA[Turkish Journal Veterinary Animal Science]]></source>
<year>2008</year>
<volume>32</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>13-8</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Associations among body condition score, body weight, somatic cell count, and clinical mastitis in seasonally calving dairy cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Berry]]></surname>
<given-names><![CDATA[DP]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Macdonald]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Stafford]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Matthews]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Roche]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Dairy Sci]]></source>
<year>2007</year>
<volume>90</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>637-48</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blowey]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
<name>
<surname><![CDATA[Edmondson]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<source><![CDATA[Mastitis Control in Dairy Herds]]></source>
<year>2010</year>
<edition>2</edition>
<page-range>266</page-range><publisher-loc><![CDATA[UK ]]></publisher-loc>
<publisher-name><![CDATA[CAB International, Oxfordshire]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic Parameters for Clinical Mastitis, Somatic Cell Score, and Production in the First Three Lactations of Swedish Holstein Cows]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carlén]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Strandberg]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Roth]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Dairy Sci]]></source>
<year>2004</year>
<volume>87</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>3062-70</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="">
<collab>CDN (Canadian Dairy Network, CA)</collab>
<source><![CDATA[Mastitis Resistance Selection: Now a Reality!]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Guelph, Canada ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Freitas]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Cobuci]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Thompson]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Carvalheira]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Valloto]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Genetic Parameters for Test Day Somatic Cell Count in Brazilian Holstein Cattle]]></source>
<year>2010</year>
<conf-name><![CDATA[ 9World Congress on Genetics Applied to Livestock Production]]></conf-name>
<conf-loc>Leipzig, Alemania </conf-loc>
<page-range>1-31</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[TheEffect of Pathogen-Specific Clinical Mastitis on the Lactation Curve for Somatic Cell Count]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Haas]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Barkema]]></surname>
<given-names><![CDATA[HW]]></given-names>
</name>
<name>
<surname><![CDATA[Veerkamp]]></surname>
<given-names><![CDATA[RF.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Dairy Sci]]></source>
<year>2002</year>
<volume>85</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1314-23</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Detilleux]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Leroy]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Volckaert]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Alternative use of somatic cell counts in genetic selection for mastitis resistance. Proceedings of the international workshop on genetic improvement of functional traits in cattle health]]></source>
<year>1997</year>
<page-range>34-44</page-range><publisher-loc><![CDATA[Uppsala, Sweden ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="">
<collab>Foss</collab>
<source><![CDATA[Fossomatic&#8482; FC]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Hilrode, Denmark ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[AD]]></given-names>
</name>
</person-group>
<source><![CDATA[Células somáticas y alto recuento bacteriano. ¿Cómo controlarlo?]]></source>
<year>2004</year>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gilmour]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
<name>
<surname><![CDATA[Cullins]]></surname>
<given-names><![CDATA[BR]]></given-names>
</name>
<name>
<surname><![CDATA[Welham]]></surname>
<given-names><![CDATA[SJ]]></given-names>
</name>
<name>
<surname><![CDATA[Thompson]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[ASREML user´s manual]]></source>
<year>1998</year>
<page-range>104</page-range><publisher-loc><![CDATA[Orange, NSW, Australia ]]></publisher-loc>
<publisher-name><![CDATA[New South Wales Agriculture, Orange Agricultural Institute]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Estimates of Genetic Parameters for Daily Somatic Cell Count of Australian Dairy Cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Haile-Mariam]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Goddard]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Bowman]]></surname>
<given-names><![CDATA[PJ]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Dairy Sci]]></source>
<year>2001</year>
<volume>84</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1255-64</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harmon]]></surname>
<given-names><![CDATA[RJ]]></given-names>
</name>
</person-group>
<source><![CDATA[Somatic cell counts: a primer]]></source>
<year>2001</year>
<conf-name><![CDATA[ 40thAnnual Meeting, National Mastitis Council]]></conf-name>
<conf-loc>Reno, Nevada, Estados Unidos </conf-loc>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Maximum Likelihood Approaches to Variance Component Estimation and to Related Problems]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Harville]]></surname>
<given-names><![CDATA[DA]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Am. Stat. Assoc]]></source>
<year>1977</year>
<volume>72</volume>
<numero>358</numero>
<issue>358</issue>
<page-range>320-38</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hogeveen]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Mastitis in Dairy Production: Current Knowledge and Future Solutions]]></source>
<year>2005</year>
<page-range>744</page-range><publisher-loc><![CDATA[The Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[Wageningen Academic Pub]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holdridge]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecología basada en zonas de vida. Traducido por Humberto Jiménez Saa]]></source>
<year>1987</year>
<page-range>216</page-range><publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[IICA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="">
<collab>INTERBULL (International Bull Evaluation Service, SE)</collab>
<source><![CDATA[International Bull Evaluation Service Official Website]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Uppsala, Sweden ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic and Genomic Evaluation of Mastitis Resistance in Canada]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jamrozik]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Koeck]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Miglior]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Kistemaker]]></surname>
<given-names><![CDATA[GJ]]></given-names>
</name>
<name>
<surname><![CDATA[Schenkel]]></surname>
<given-names><![CDATA[FS]]></given-names>
</name>
<name>
<surname><![CDATA[Kelton]]></surname>
<given-names><![CDATA[DF]]></given-names>
</name>
<name>
<surname><![CDATA[Van Doormaal]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
</person-group>
<source><![CDATA[INTERBULL Bulletin]]></source>
<year>2013</year>
<numero>47</numero>
<issue>47</issue>
<page-range>43-51</page-range><publisher-loc><![CDATA[Nantes, France ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lévesque]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<source><![CDATA[Menos mastitis, mejor leche]]></source>
<year>2004</year>
<page-range>96</page-range><publisher-loc><![CDATA[Québec, Canada ]]></publisher-loc>
<publisher-name><![CDATA[Institut de Technologie Agroalimetaire]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The association between herd- and cow- level factors and somatic cell count of Irish dairy cows]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[McParland]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[O&#8217;Brien]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[McCarthy]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Irish J. Agr. Food Res]]></source>
<year>2013</year>
<volume>52</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>151-8</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Index for Mastitis Resistance and Use of BHBA for Evaluation of Health Traits in Canadian Holsteins]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Miglior]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Koeck]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Jamrozik]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Schenkel]]></surname>
<given-names><![CDATA[FS]]></given-names>
</name>
<name>
<surname><![CDATA[Kelton]]></surname>
<given-names><![CDATA[DF]]></given-names>
</name>
<name>
<surname><![CDATA[Kistemaker]]></surname>
<given-names><![CDATA[GJ]]></given-names>
</name>
<name>
<surname><![CDATA[Van Doormaal]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
</person-group>
<source><![CDATA[INTERBULL Bulletin]]></source>
<year>2014</year>
<numero>48</numero>
<issue>48</issue>
<page-range>73-8</page-range><publisher-loc><![CDATA[Berlin, Germany ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effect of teat end hyperkeratosis on milk somatic cell counts in Bulgarian Black-and-White dairy cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mitev]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Gergovska]]></surname>
<given-names><![CDATA[ZHI]]></given-names>
</name>
<name>
<surname><![CDATA[Miteva]]></surname>
<given-names><![CDATA[TCHM]]></given-names>
</name>
</person-group>
<source><![CDATA[Bulgarian J. Agric. Sci]]></source>
<year>2012</year>
<volume>18</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>451-4</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic and statistical properties of somatic cell count and its suitability as an indirect means of reducing the incidence of mastitis in dairy cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mrode]]></surname>
<given-names><![CDATA[RA]]></given-names>
</name>
<name>
<surname><![CDATA[Swanson]]></surname>
<given-names><![CDATA[GJT]]></given-names>
</name>
</person-group>
<source><![CDATA[Anim. Breed. Abs]]></source>
<year>1996</year>
<volume>64</volume>
<page-range>847-57</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Neijenhuis]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Mein]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
<name>
<surname><![CDATA[Britt]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
<name>
<surname><![CDATA[Reinemann]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
<name>
<surname><![CDATA[Hillerton]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Farnsworth]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Baines]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Hemling]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Ohnstad]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Cook]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Morgan]]></surname>
<given-names><![CDATA[WF]]></given-names>
</name>
<name>
<surname><![CDATA[Timms]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluation of bovine teat condition in commercial dairy herds: 4. Relationship between teat-end callosity or hyperkeratosis and mastitis]]></source>
<year>2001</year>
<conf-name><![CDATA[ 2thInternational Symposium on Mastitis and Milk Quality]]></conf-name>
<conf-loc>Vancouver, BC, Canada </conf-loc>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="">
<collab>NMC (National Mastitis Council, USA)</collab>
<source><![CDATA[Recommended mastitis control program-International version]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Wisconsin, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Veterinary automated management and production control program for dairy farms (VAMPP). The application of MUMPS for data processing]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Noordhuizen]]></surname>
<given-names><![CDATA[JPTM]]></given-names>
</name>
<name>
<surname><![CDATA[Buurman]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Vet. Q]]></source>
<year>1984</year>
<volume>6</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>66-72</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Baayen]]></surname>
<given-names><![CDATA[MT]]></given-names>
</name>
<name>
<surname><![CDATA[Capella]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Barkema]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Kuil]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Palin]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
<name>
<surname><![CDATA[Huhn]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
</person-group>
<source><![CDATA[Development of a livestock information system for Costa Rica]]></source>
<year>1989</year>
<conf-name><![CDATA[ IVConf. Inst. Trop. Vet. Med]]></conf-name>
<conf-loc>Utrecht, The Netherlands </conf-loc>
<page-range>221-4</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[A comparison between Holstein-Friesian and Jersey dairy cows and their F1 cross with regard to milk yield, somatic cell score, mastitis, and milking characteristics under grazing conditions]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Prendiville]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Pierce]]></surname>
<given-names><![CDATA[KM]]></given-names>
</name>
<name>
<surname><![CDATA[Buckley]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Dairy Sci]]></source>
<year>2010</year>
<volume>93</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>2741-50</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[An Approximate Bayesian Analysis of Somatic Cell Score Curves in Holsteins]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodriguez-Zas]]></surname>
<given-names><![CDATA[SL]]></given-names>
</name>
<name>
<surname><![CDATA[Gianola]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Shook]]></surname>
<given-names><![CDATA[GE]]></given-names>
</name>
</person-group>
<source><![CDATA[Acta Agric. Scand., Sect. A, Animal Sci]]></source>
<year>2000</year>
<volume>50</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>291-9</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Understanding and using somatic cell counts to improve milk quality]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ruegg]]></surname>
<given-names><![CDATA[PL]]></given-names>
</name>
<name>
<surname><![CDATA[Pantoja]]></surname>
<given-names><![CDATA[JCF]]></given-names>
</name>
</person-group>
<source><![CDATA[Irish J. Agric. Food Res]]></source>
<year>2013</year>
<volume>52</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>101-17</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetics of resistance to mastitis in dairy cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rupp]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Boicchard]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<source><![CDATA[Vet. Res]]></source>
<year>2003</year>
<volume>34</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>671-88</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic Evaluation of Somatic Cell Scores for United States Dairy Cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schutz]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
</person-group>
<source><![CDATA[J Dairy Sci]]></source>
<year>1994</year>
<volume>77</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>2113-29</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Analysis of the Relationship Between Somatic Cell Score and Functional Longevity in Canadian Dairy Cattle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sewalem]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Miglior]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Kistemaker]]></surname>
<given-names><![CDATA[GJ]]></given-names>
</name>
<name>
<surname><![CDATA[Van Doormaal]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Dairy Sci]]></source>
<year>2006</year>
<volume>89</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>3609-14</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Relationship of Somatic Cell Count and Mastitis: An Overview]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[NK]]></given-names>
</name>
<name>
<surname><![CDATA[Bhadwal]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
</person-group>
<source><![CDATA[Asian-Aust. J. Anim. Sci]]></source>
<year>2011</year>
<volume>24</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>429-38</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shook]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<source><![CDATA[Breeding, selection and somatic cell counts: Where are we today?]]></source>
<year>2001</year>
<publisher-loc><![CDATA[Wisconsin, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic improvement of mastitis through selection on somatic cell count]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shook]]></surname>
<given-names><![CDATA[GE]]></given-names>
</name>
</person-group>
<source><![CDATA[Vet. Clin. North Am. Food Anim. Pract]]></source>
<year>1993</year>
<volume>9</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>563-81</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="">
<collab>USDA (Department of Agriculture, USA)</collab>
<source><![CDATA[Dairy 2007 Part I: Reference of Dairy Cattle Health and Management Practices in the United States, 2007]]></source>
<year>2007</year>
<publisher-loc><![CDATA[Colorado, USA ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Heritability estimates associated with alternative definitions of mastitis and correlations with somatic cell score and yield]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vallimont]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[Dechow]]></surname>
<given-names><![CDATA[CD]]></given-names>
</name>
<name>
<surname><![CDATA[Sattler]]></surname>
<given-names><![CDATA[CG]]></given-names>
</name>
<name>
<surname><![CDATA[Clay]]></surname>
<given-names><![CDATA[JS]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Dairy Sci]]></source>
<year>2009</year>
<volume>92</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>3402-10</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas Bejarano]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La calidad de la leche en Costa Rica. La Cooperativa de Productores de Leche Dos Pinos: Un caso de éxito]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Barbosa]]></surname>
<given-names><![CDATA[SBP]]></given-names>
</name>
<name>
<surname><![CDATA[Batista]]></surname>
<given-names><![CDATA[AMV]]></given-names>
</name>
<name>
<surname><![CDATA[Monardes]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Congresso Brasileiro de Qualidade do Leite]]></source>
<year>2008</year>
<page-range>241-50</page-range><publisher-loc><![CDATA[Recife, Brasil ]]></publisher-loc>
<publisher-name><![CDATA[CCS Gráfica e Editora]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Genetic parameters for somatic cell score and production traits in the first three lactations of Chinese Holstein cow]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zhao]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Guo]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Guo]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Zhang]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Du]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Integr. Agric]]></source>
<year>2015</year>
<volume>14</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>125-30</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
