<?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>2224-7920</journal-id>
<journal-title><![CDATA[Revista de Producción Animal]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. prod. anim.]]></abbrev-journal-title>
<issn>2224-7920</issn>
<publisher>
<publisher-name><![CDATA[Ediciones Universidad de Camagüey]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-79202023000200059</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Etiología de la Mastitis bovina en Zamora-Chinchipe, Ecuador]]></article-title>
<article-title xml:lang="en"><![CDATA[Etiology of Cattle Mastitis in Zamora-Chinchipe, Ecuador]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Sanmartín]]></surname>
<given-names><![CDATA[Natacha]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodrigo-Saa]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lobo-Rivero]]></surname>
<given-names><![CDATA[Evelyn]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Castillo]]></surname>
<given-names><![CDATA[Anisleidy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Percedo-Abreu]]></surname>
<given-names><![CDATA[María Irian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Loja (UNL)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Técnica Particular de Loja (UTPL)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Centro Nacional de Sanidad Agropecuaria (CENSA)  ]]></institution>
<addr-line><![CDATA[Mayabeque ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2023</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>59</fpage>
<lpage>72</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-79202023000200059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-79202023000200059&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-79202023000200059&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: La mastitis bovina, problema sanitario y económico a nivel global, tiene implicaciones para la salud animal y humana. Numerosos microorganismos involucrados en su etiología complican su prevención y control, como Mycoplasma bovis.  Objetivo.  Profundizar en la etiología bacteriana de la mastitis bovina en Zamora-Chinchipe, Ecuador, en cuyos rebaños se constató previamente la presencia de Mollicutes en leche de tanque.  Materiales y métodos:  Durante 2015 y 2016 se muestrearon 247 vacas en ordeño de rebaños bovinos lecheros en la provincia Zamora-Chinchipe, seleccionados en los conglomerados definidos en el territorio según sus características ecológicas. Las muestras de leche de cada vaca se investigaron mediante Prueba California para Mastitis (CMT), y para el diagnóstico microbiológico de Mollicutes se realizó Reacción en Cadena de la Polimerasa (PCR), así como el diagnóstico bacteriológico para la identificación de otros patógenos. Mediante comparación de proporciones se analizaron los resultados del diagnóstico de Mollicutes y CMT en vacas por cantones y entre los patógenos identificados en las vacas positivas a Mollicutes. A través de Chi Cuadrado se evaluó la relación entre los resultados del diagnóstico de Mollicutes y CMT, y de los patógenos identificados, y por regresión logística se comparó su Razón de Prevalencia (RP).  Resultados:  Se encontró elevada frecuencia de mastitis subclínica (81.4%) mediante CMT y una frecuencia de 33,2 % de vacas positivas a Mycoplasma spp. En el diagnóstico bacteriológico Streptococcus spp. (27,2%) y Staphylococcus aureus (22,1%) tuvieron las mayores frecuencias (P&lt; 0,05). S. aureus se detectó con la mayor frecuencia en vacas positivas a Mycoplasma spp. (43,8%; P&lt;0,05).  Conclusiones: Se destaca la importancia de la elevada coinfección de Mycoplasma spp. y S. aureus por su repercusión potencial en el comportamiento clínico-epidemiológico de la mastitis bovina en la provincia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Cattle mastitis is a global sanitary and economic problem that affects human and animal health. Several microorganisms involved in its etiology, such as Mycoplasma bovis, make prevention and control more difficult.  Aim.  To deepen the bacterial etiology of cattle mastitis in Zamora-Chinchipe, Ecuador, where collected milk was observed to have Mollicutes.  Materials and methods:  A number of 247 milking cows were studied in 2015-2016 in herds from Zamora-Chinchipe province, selected in areas with adequate ecological characteristics. The California Mastitis Test (CMT) was run on milk samples from each cow whereas Polymerase Chain Reaction (PCR) was performed to detect Mollicutes, and a bacteriological diagnostic was made to identify other pathogens. A comparison of proportions analysis was conducted to analyze the results of Mollicute presence, and CMT in the cows per cantons, and between the pathogens identified in the Mollicute-positive cows. Chi-square helped evaluate the relation between the Mollicute diagnostic results and CMT, and the pathogens identified. Logistic regression was useful to compare the prevalence ratio (PR).  Results:  The frequency of subclinical mastitis was found at high levels (81.4%) through CMT, and a frequency of 33.2% of Mycoplasma spp.-positive cows. In the bacteriological diagnostic, Streptococcus spp. (27.2%) and Staphylococcus aureus (22.1%) showed the highest frequencies (P&lt; 0.05). S. aureus was detected with the highest frequency in the Mycoplasma spp.-positive cows (43.8%; P&lt;0.05).  Conclusions: The high infection caused by Mycoplasma spp. and S. aureus was significant, due to their potential repercussion on the clinical-epidemiological behavior of bovine mastitis in the province.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Mastitis Bovina]]></kwd>
<kwd lng="es"><![CDATA[Mollicutes]]></kwd>
<kwd lng="es"><![CDATA[Mycoplasma]]></kwd>
<kwd lng="es"><![CDATA[PCR]]></kwd>
<kwd lng="es"><![CDATA[Staphylococcus]]></kwd>
<kwd lng="en"><![CDATA[Bovine mastitis]]></kwd>
<kwd lng="en"><![CDATA[Mollicutes]]></kwd>
<kwd lng="en"><![CDATA[Mycoplasma]]></kwd>
<kwd lng="en"><![CDATA[PCR]]></kwd>
<kwd lng="en"><![CDATA[Staphylococcus]]></kwd>
</kwd-group>
</article-meta>
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