<?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>1665-1456</journal-id>
<journal-title><![CDATA[Biotecnia]]></journal-title>
<abbrev-journal-title><![CDATA[Biotecnia]]></abbrev-journal-title>
<issn>1665-1456</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Sonora, División de Ciencias Biológicas y de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-14562022000100079</article-id>
<article-id pub-id-type="doi">10.18633/biotecnia.v24i1.1552</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prevalencia y relación de mastitis con niveles séricos de vitaminas E y A y estatus microbiológico en vacas criollas doble propósito, en época de verano]]></article-title>
<article-title xml:lang="en"><![CDATA[Activity of three essential oils on the mortality of Rhyzopertha dominica (F.) in stored wheat]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Iturralde-García]]></surname>
<given-names><![CDATA[RD]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Borboa-Flores]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-Maríñez]]></surname>
<given-names><![CDATA[RI]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cortez-Rocha]]></surname>
<given-names><![CDATA[MO]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cinco-Moroyoqui]]></surname>
<given-names><![CDATA[FJ]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wong-Corral]]></surname>
<given-names><![CDATA[FJ]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Sonora Departamento de Investigación y Posgrado en Alimentos ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Sonora Departamento de Ciencias Químico Biológicas ]]></institution>
<addr-line><![CDATA[Hermosillo Sonora]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2022</year>
</pub-date>
<volume>24</volume>
<numero>1</numero>
<fpage>79</fpage>
<lpage>86</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-14562022000100079&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-14562022000100079&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-14562022000100079&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del estudio fue determinar la prevalencia de mastitis subclínica en ganado de doble propósito en pastoreo a través de microbiología en leche y su asociación con niveles séricos de las vitaminas E y A en un ejido de la región central del estado de Sonora, México, en verano donde las temperaturas rebasan los 40°C. Se analizaron 504 muestras de leche correspondientes a los cuatro cuartos de 126 vacas para cultivo microbiológico: pruebas de catalasa, coagulasa y oxidasa. La sensibilidad antimicrobiana de los aislamientos fue por el método de Kirby-Bauer. Las vitaminas A y E fueron analizadas por HPLC. El índice de temperatura y humedad relativa se midió relacionando temperatura ambiente y humedad relativa. Se encontró una prevalencia del 65.80% y especies Gram positivos en racimos, coagulasa y catalasa positiva; oxidasa negativa que suponen del género Staphylococcus sp. La ceftriaxona fue el antibiótico al que mostraron resistencia. Los valores séricos de vitamina A (0.59µmol/L) y E (5.58 µmol/L) fueron menores a los normales y no correlacionados (P&gt;0.05) con mastitis. Los animales mostraron estrés calórico moderado (THI &#8805;80). Se encontró una alta prevalencia de mastitis subclínica no asociada a las vitaminas y deficiencias de las vitaminas E y A]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary The objective of this study was to determine the prevalence of subclinical mastitis in dual-purpose cattle under grazing conditions through milk microbiology, and its association with serum levels of vitamins E and A in ranches located in the central region of Sonora México, during the summer where temperatures exceed 40 ° C. Milk samples were collected from the four quarters of 126 cows, for microbiological culture, including evaluation of catalase, coagulase, and oxidase activity. The isolates were tested for antimicrobial sensitivity by the Kirby-Bauer method (disk-diffusion on agar). Vitamin A and E were analyzed by HPLC. Temperature and relative humidity index (THI) were measured by relating ambient temperature and relative humidity. Mastitis prevalence was 65.80%, and the presence of Gram-positive species in clusters, coagulase and catalase-positive and oxidase negative, suggests the presence of Staphylococcus sp. Furthermore, the highest resistance found was against the ceftriaxone antibiotic. Serum values of vitamin A and E, 0.59 and 5.58 µmol/L respectively, were lower than normal values, and did not correlate with mastitis. The animals were under moderate heat stress (THI &#8805;80). We conclude a high prevalence of subclinical mastitis not associated with vitamins and deficiencies of vitamins E and A in summer.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Mastitis]]></kwd>
<kwd lng="es"><![CDATA[Vitamina A]]></kwd>
<kwd lng="es"><![CDATA[Vitamina E]]></kwd>
<kwd lng="es"><![CDATA[Microbiología de la leche]]></kwd>
<kwd lng="es"><![CDATA[Verano]]></kwd>
<kwd lng="en"><![CDATA[Mastitis]]></kwd>
<kwd lng="en"><![CDATA[Vitamin A]]></kwd>
<kwd lng="en"><![CDATA[Vitamin E]]></kwd>
<kwd lng="en"><![CDATA[Milk Microbiology]]></kwd>
<kwd lng="en"><![CDATA[Summer]]></kwd>
</kwd-group>
</article-meta>
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