<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242021000100273</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v12i1.5392</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nivel de infestación de Rhipicephalus microplus y su asociación con factores climatológicos y la ganancia de peso en bovinos Bos taurus x Bos indicus]]></article-title>
<article-title xml:lang="en"><![CDATA[Rhipicephalus microplus infestation level and its association with climatological factors and weight gain in Bos taurus x Bos indicus cattle]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castañeda Arriola]]></surname>
<given-names><![CDATA[Roberto Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Martínez]]></surname>
<given-names><![CDATA[Jesús Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas Martínez]]></surname>
<given-names><![CDATA[Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lira Amaya]]></surname>
<given-names><![CDATA[José Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ríos Utrera]]></surname>
<given-names><![CDATA[Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Ibáñez]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental La Posta ]]></institution>
<addr-line><![CDATA[ Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias CENID-SAI ]]></institution>
<addr-line><![CDATA[ Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Servicios de Sanidad, Inocuidad y Calidad Agroalimentaria  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>12</volume>
<numero>1</numero>
<fpage>273</fpage>
<lpage>285</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242021000100273&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242021000100273&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242021000100273&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo fue evaluar el grado de infestación natural por Rhipicephalus microplus, así como determinar su correlación con factores climatológicos y su efecto sobre la ganancia de peso en bovinos doble propósito. Se utilizaron 31 bovinos cruzados, Bos taurus x Bos indicus, de ambos sexos, con una edad promedio de 307 días. El conteo de garrapatas semi-repletas (4.5 a 8.0 mm de diámetro) y el pesaje de los animales se realizaron cada 28 días. El conteo de garrapatas se realizó desde la cabeza hasta la base de la cola, abarcando miembros anteriores y posteriores, así como la región ventral de los animales. Las variables de respuesta estudiadas fueron número de garrapatas semi-repletas y ganancia de peso promedio del animal. En julio el número promedio de garrapatas por animal fue mayor (P&lt;0.05) que en el resto de los meses del año. Por el contrario, el sexo y el grupo racial del animal no afectaron (P&gt;0.05) el número de garrapatas. La ganancia de peso disminuyó 34 g (P&lt;0.05) por cada garrapata semi-repleta por periodo. El número de garrapatas tuvo una correlación baja (P&lt;0.01) con la temperatura ambiental y humedad relativa; ganancia de peso promedio correlacionó negativa y moderadamente con el número de garrapatas (-0.67; P&lt;0.01). Los bovinos con un nivel de infestación alto (61 garrapatas o más) tuvieron una ganancia de peso promedio menor (P=0.001) que aquellos con nivel de infestación medio (31 a 60 garrapatas) y bajo (0 a 30 garrapatas). La infestación de bovinos de doble propósito con Boophilus microplus requiere un control más estricto en los meses de mayor temperatura ambiental (abril a julio).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Tick infestation is an ongoing challenge in cattle production, but chemical control methods can pose a risk to both animals and handlers. An evaluation was done of natural Rhipicephalus microplus infestation, its correlation to climatological factors and its effect on weight gain in dual-purpose cattle. Individuals consisted of 31 Bos taurus x Bos indicus cattle of both sexes with an average age of 307 d. Every 28 d for 15 mo, counts of semi-engorged ticks (4.5 to 8.0 mm in diameter) were done and the animals weighed. Tick counts were done from the head to the base of the tail, including the fore and hind limbs, and the ventral region. Response variables were tick count and average weight per animal. Average tick count per animal was higher (P&lt;0.05) in the hottest month (July) than in the other months. Calf&#8217;s sex and breed group had no effect (P&gt;0.05) on tick count. Individual weight gain decreased 34 g (P&lt;0.05) for each semi-engorged tick per 28-day period. Tick count had a low correlation (P&lt;0.01) with environmental temperature and relative humidity, but average weight gain was negatively and moderately correlated with tick count (-0.67; P&lt;0.01). Animals with a high infestation level (61+ ticks) exhibited lower average weight gain (P=0.001) than those with a medium (31 to 60 ticks) or low level (0 to 30 ticks). Boophilus microplus infestation in dual-purpose cattle requires stricter control during high-temperature months (April to July).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Garrapatas]]></kwd>
<kwd lng="es"><![CDATA[Nivel de infestación]]></kwd>
<kwd lng="es"><![CDATA[Ganancia de peso]]></kwd>
<kwd lng="es"><![CDATA[Temperatura ambiental]]></kwd>
<kwd lng="es"><![CDATA[Regresión lineal]]></kwd>
<kwd lng="en"><![CDATA[Ticks]]></kwd>
<kwd lng="en"><![CDATA[Infestation level]]></kwd>
<kwd lng="en"><![CDATA[Weight gain]]></kwd>
<kwd lng="en"><![CDATA[Environmental temperature]]></kwd>
<kwd lng="en"><![CDATA[Linear regression]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[SPJR]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[OR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Boophilus microplus: estado actual de la resistencia a los acaricidas en la frontera México Estados Unidos y su impacto en la relación comercial]]></article-title>
<source><![CDATA[Rev Mex Cienc Pecu]]></source>
<year>2012</year>
<volume>3</volume>
<numero>^s1</numero>
<issue>^s1</issue>
<supplement>1</supplement>
<page-range>1-8</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rajput]]></surname>
<given-names><![CDATA[ZI]]></given-names>
</name>
<name>
<surname><![CDATA[Song-hua]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Ch]]></surname>
<given-names><![CDATA[Wan-jun]]></given-names>
</name>
<name>
<surname><![CDATA[Arijo]]></surname>
<given-names><![CDATA[AG]]></given-names>
</name>
<name>
<surname><![CDATA[Chen-wen]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Importance of ticks and their chemical and immunological control in livestock]]></article-title>
<source><![CDATA[J Zhejiang Univ Science B]]></source>
<year>2006</year>
<volume>7</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>912-21</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[BA]]></given-names>
</name>
</person-group>
<source><![CDATA[Situación actual de la campaña nacional contra la garrapata en México]]></source>
<year>1999</year>
<conf-name><![CDATA[ IVSeminario Internacional de Parasitología Animal]]></conf-name>
<conf-loc>Puerto Vallarta, Jalisco, México </conf-loc>
<page-range>47-50</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wharton]]></surname>
<given-names><![CDATA[RH]]></given-names>
</name>
<name>
<surname><![CDATA[Utech]]></surname>
<given-names><![CDATA[KBW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The relation between engorgement and dropping of B. microplus (Canestrini) (Ixodidae) to the assessment of tick numbers on cattle]]></article-title>
<source><![CDATA[J Aust Entomol Soc]]></source>
<year>1970</year>
<volume>9</volume>
<page-range>171-82</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez-Vivas]]></surname>
<given-names><![CDATA[RI]]></given-names>
</name>
<name>
<surname><![CDATA[Domínguez]]></surname>
<given-names><![CDATA[AJ]]></given-names>
</name>
<name>
<surname><![CDATA[Cob]]></surname>
<given-names><![CDATA[GL]]></given-names>
</name>
</person-group>
<source><![CDATA[Técnicas diagnósticas de parasitología veterinaria]]></source>
<year>1994</year>
<page-range>131-40</page-range><publisher-loc><![CDATA[Mérida, Yucatán, México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma de Yucatán]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Cerón]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Becerril-Pérez]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
<name>
<surname><![CDATA[Torres-Hernández]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Díaz-Rivera]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Garrapatas que infestan regiones corporales del bovino Criollo Lechero Tropical en Veracruz, México]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2009</year>
<volume>43</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>11-9</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="book">
<collab>SAS Institute Inc</collab>
<source><![CDATA[SAS/STAT® 9.3 User&#8217;s guide]]></source>
<year>2011</year>
<publisher-loc><![CDATA[Cary, NC ]]></publisher-loc>
<publisher-name><![CDATA[SAS Institute Inc]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alonso-Díaz]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[López-Silva]]></surname>
<given-names><![CDATA[BJ]]></given-names>
</name>
<name>
<surname><![CDATA[de Magalhães-Labarthe]]></surname>
<given-names><![CDATA[ACL]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Vivas]]></surname>
<given-names><![CDATA[RI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Infestación natural de hembras de Boophilus microplus Canestrini, 1887 (Acari: Ixodidae) en dos genotipos de bovinos en el trópico húmedo de Veracruz, México]]></article-title>
<source><![CDATA[Vet Méx]]></source>
<year>2007</year>
<volume>38</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>503-9</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Cerón]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Becerril-Pérez]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
<name>
<surname><![CDATA[Torres-Hernández]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Díaz-Rivera]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Santellano-Estrada]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Rosendo-Ponce]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Infestación natural por Amblyomma cajennese y Boophilus microplus en bovinos Criollo Lechero Tropical durante la época de lluvias]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2009</year>
<volume>43</volume>
<page-range>577-84</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gaxiola]]></surname>
<given-names><![CDATA[CSM]]></given-names>
</name>
<name>
<surname><![CDATA[Borbolla]]></surname>
<given-names><![CDATA[IJE]]></given-names>
</name>
<name>
<surname><![CDATA[Quintero]]></surname>
<given-names><![CDATA[MMT]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<name>
<surname><![CDATA[Borbolla]]></surname>
<given-names><![CDATA[IJ]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[CN]]></given-names>
</name>
</person-group>
<source><![CDATA[Infestación natural de bovinos con Boophilus microplus en el municipio de Culiacán, Sinaloa, México]]></source>
<year>1999</year>
<conf-name><![CDATA[ IVSeminario Internacional de Parasitología Animal]]></conf-name>
<conf-loc>Puerto Vallarta, Jalisco, México </conf-loc>
<page-range>225-6</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rodríguez-Gallegos]]></surname>
<given-names><![CDATA[CE]]></given-names>
</name>
<name>
<surname><![CDATA[Acosta-Rodríguez]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Genetic and environmental factors influencing the resistance of terminal cross calves to tick Rhipicephalus (Boophilus) microplus and horn fly Haematobia irritans]]></article-title>
<source><![CDATA[Trop Subtrop Agroecosys]]></source>
<year>2011</year>
<volume>13</volume>
<page-range>437-44</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Seifert]]></surname>
<given-names><![CDATA[GW]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Variations between and within breeds of cattle in resistance to field infestations of the cattle tick (Boophilus microplus)]]></article-title>
<source><![CDATA[Aust J Agric Res]]></source>
<year>1971</year>
<volume>22</volume>
<page-range>159-68</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sutherst]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
</person-group>
<source><![CDATA[Resistance of cattle to ticks and one element in control programme in Mexico]]></source>
<year>1989</year>
<page-range>154-64</page-range><publisher-loc><![CDATA[FAO Animal Production and Health Paper ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[JJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sustainable tick and tickborne disease control in livestock improvement in developing countries]]></article-title>
<source><![CDATA[Vet Parasitol]]></source>
<year>1997</year>
<volume>71</volume>
<page-range>77-97</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gomes]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Honer]]></surname>
<given-names><![CDATA[MR]]></given-names>
</name>
<name>
<surname><![CDATA[Schenck]]></surname>
<given-names><![CDATA[MAM]]></given-names>
</name>
<name>
<surname><![CDATA[Curvo]]></surname>
<given-names><![CDATA[JBE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Populations of the cattle tick Boophilus microplus on purebred Nelore, Ibagé and Nelore×European crossbreds in the Brazilian Savanna]]></article-title>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>1989</year>
<volume>21</volume>
<page-range>20-4</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Scholtz]]></surname>
<given-names><![CDATA[MM]]></given-names>
</name>
<name>
<surname><![CDATA[Spickett]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Lombard]]></surname>
<given-names><![CDATA[PE]]></given-names>
</name>
<name>
<surname><![CDATA[Enslin]]></surname>
<given-names><![CDATA[CB]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of tick infestation on the productivity of cows of three breeds of cattle]]></article-title>
<source><![CDATA[Onderstepoort J Vet Res]]></source>
<year>1991</year>
<volume>58</volume>
<page-range>71-4</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meltzer]]></surname>
<given-names><![CDATA[MI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A possible explanation of the apparent breed-related resistance in cattle to Bont tick (Amblyomma hebraeum) infestations]]></article-title>
<source><![CDATA[Vet Parasitol]]></source>
<year>1996</year>
<volume>67</volume>
<page-range>275-9</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brizuela]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
<name>
<surname><![CDATA[Ortellano]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
<name>
<surname><![CDATA[Sanchez]]></surname>
<given-names><![CDATA[TI]]></given-names>
</name>
<name>
<surname><![CDATA[Walker]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Formulation of an integrated control of Boophilus microplus in Paraguay]]></article-title>
<source><![CDATA[Vet Parasitol]]></source>
<year>1996</year>
<volume>63</volume>
<page-range>95-108</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Norval]]></surname>
<given-names><![CDATA[RAI]]></given-names>
</name>
<name>
<surname><![CDATA[Sutherst]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
<name>
<surname><![CDATA[Kerr]]></surname>
<given-names><![CDATA[JD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Infestations of the bont tick Amblyomma hebraeum (Acari: Ixodidae) on different breeds of cattle in Zimbabwe]]></article-title>
<source><![CDATA[Exp Appl Acarology]]></source>
<year>1996</year>
<volume>20</volume>
<page-range>599-605</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Frisch]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
<name>
<surname><![CDATA[O'Neill]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparative evaluation of beef cattle breeds of African, European and Indian origins. 2. Resistance to cattle ticks and gastrointestinal nematodes]]></article-title>
<source><![CDATA[Anim Sci]]></source>
<year>1998</year>
<volume>67</volume>
<page-range>39-48</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Norval]]></surname>
<given-names><![CDATA[RAI]]></given-names>
</name>
<name>
<surname><![CDATA[Sutherst]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
<name>
<surname><![CDATA[Kurki]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Gibson]]></surname>
<given-names><![CDATA[JD]]></given-names>
</name>
<name>
<surname><![CDATA[Kerr]]></surname>
<given-names><![CDATA[JD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of the brown ear-tick (Rhipicephalus appendiculatus) on the growth of Sanga and European breed cattle]]></article-title>
<source><![CDATA[Vet Parasitol]]></source>
<year>1988</year>
<volume>30</volume>
<page-range>149-64</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tolleson]]></surname>
<given-names><![CDATA[DR]]></given-names>
</name>
<name>
<surname><![CDATA[Teel]]></surname>
<given-names><![CDATA[PD]]></given-names>
</name>
<name>
<surname><![CDATA[Stuth]]></surname>
<given-names><![CDATA[JW]]></given-names>
</name>
<name>
<surname><![CDATA[Strey]]></surname>
<given-names><![CDATA[OF]]></given-names>
</name>
<name>
<surname><![CDATA[Jr. TH]]></surname>
<given-names><![CDATA[Welsh]]></given-names>
</name>
<name>
<surname><![CDATA[Carstens]]></surname>
<given-names><![CDATA[GE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of a lone star tick (Amblyomma americanum) burden on performance and metabolic indicators in growing beef steers]]></article-title>
<source><![CDATA[Vet Parasitol]]></source>
<year>2010</year>
<volume>173</volume>
<page-range>99-106</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pegram]]></surname>
<given-names><![CDATA[RG]]></given-names>
</name>
<name>
<surname><![CDATA[Lemche]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Chizyuka]]></surname>
<given-names><![CDATA[HGB]]></given-names>
</name>
<name>
<surname><![CDATA[Sutherst]]></surname>
<given-names><![CDATA[RW]]></given-names>
</name>
<name>
<surname><![CDATA[Floyd]]></surname>
<given-names><![CDATA[RB]]></given-names>
</name>
<name>
<surname><![CDATA[Kerr]]></surname>
<given-names><![CDATA[JD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of tick control on liveweight gain of cattle in central Zambia]]></article-title>
<source><![CDATA[Med Vet Entomol]]></source>
<year>1989</year>
<volume>3</volume>
<page-range>313-20</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stachurski]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Musonge]]></surname>
<given-names><![CDATA[EN]]></given-names>
</name>
<name>
<surname><![CDATA[Achu-kwi]]></surname>
<given-names><![CDATA[MD]]></given-names>
</name>
<name>
<surname><![CDATA[Saliki]]></surname>
<given-names><![CDATA[JT]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of natural infestation of Amblyomma variegatum on the liveweight gain of male Gudali cattle in Adamawa (Cameroon)]]></article-title>
<source><![CDATA[Vet Parasitol]]></source>
<year>1993</year>
<volume>9</volume>
<page-range>299-311</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Labruna]]></surname>
<given-names><![CDATA[MB]]></given-names>
</name>
<name>
<surname><![CDATA[Veríssimo]]></surname>
<given-names><![CDATA[CJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Observações sobre a infestação por Boophilus microplus (Acari: Ixodidae) em bovinos mantidos em rotação de pastagem, sob alta densidade animal]]></article-title>
<source><![CDATA[Arq Inst Biol]]></source>
<year>2001</year>
<volume>68</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>115-20</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Corrier]]></surname>
<given-names><![CDATA[DE]]></given-names>
</name>
<name>
<surname><![CDATA[Vizcaino]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Terry]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Betancourt]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Kuttler]]></surname>
<given-names><![CDATA[KL]]></given-names>
</name>
<name>
<surname><![CDATA[Carson]]></surname>
<given-names><![CDATA[CA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mortality, weight loss and anaemia in Bos taurus calves exposed to Boophilus microplus ticks in the tropics of Colombia]]></article-title>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>1979</year>
<volume>11</volume>
<page-range>215-21</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mattioli]]></surname>
<given-names><![CDATA[RC]]></given-names>
</name>
<name>
<surname><![CDATA[Pandey]]></surname>
<given-names><![CDATA[VS]]></given-names>
</name>
<name>
<surname><![CDATA[Murray]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Fitzpatrick]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Immunogenetic influences on tick resistance in African cattle with particular reference to trypanotolerant N&#8217;Dama (Bos taurus) and trypanosusceptible Gobra zebu (Bos indicus) cattle]]></article-title>
<source><![CDATA[Acta Tropica]]></source>
<year>2000</year>
<volume>75</volume>
<page-range>263-77</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Das]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Ghosh]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Ray]]></surname>
<given-names><![CDATA[DD]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reduction of Theileria annulata infection in ticks fed on calves immunized with purified larval antigens of Hyalomma anatolicum anatolicum]]></article-title>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>2005</year>
<volume>37</volume>
<page-range>345-61</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jonsson]]></surname>
<given-names><![CDATA[NN]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The productivity effects of cattle tick (Boophilus microplus) infestation on cattle, with particular reference to Bos indicus cattle and their crosses]]></article-title>
<source><![CDATA[Vet Parasitol]]></source>
<year>2006</year>
<volume>137</volume>
<page-range>1-10</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
