<?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>2448-9190</journal-id>
<journal-title><![CDATA[Revista alergia México]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. alerg. Méx.]]></abbrev-journal-title>
<issn>2448-9190</issn>
<publisher>
<publisher-name><![CDATA[Colegio Mexicano de Inmunología Clínica y Alergia A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-91902025000400276</article-id>
<article-id pub-id-type="doi">10.29262/ram.v72i4.1462</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Domestic hypersensitivity pneumonitis caused by inadvertent exposure to feathers]]></article-title>
<article-title xml:lang="es"><![CDATA[Neumonitis por hipersensibilidad doméstica causada por exposición accidental a plumas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pose]]></surname>
<given-names><![CDATA[Katherine]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vecillas]]></surname>
<given-names><![CDATA[Leticia de las]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tomás-Pérez]]></surname>
<given-names><![CDATA[Margarita]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barranco]]></surname>
<given-names><![CDATA[Pilar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quirce]]></surname>
<given-names><![CDATA[Santiago]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez-Ortega]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
<xref ref-type="aff" rid="A a"/>
<xref ref-type="aff" rid="A3"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,La Paz University Hospital Department of Allergy ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Institute for Health Research (IdiPAZ)  ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>Spain</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,CIBER de Enfermedades Respiratorias (CIBERES)  ]]></institution>
<addr-line><![CDATA[Madrid ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<volume>72</volume>
<numero>4</numero>
<fpage>276</fpage>
<lpage>280</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-91902025000400276&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-91902025000400276&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-91902025000400276&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: Case series of patients with domestic hypersensitivity pneumonitis, focusing on hidden avian exposures or other non-suspected antigens (feather comforters and pillows).  Methods: Seven female patients diagnosed with non-occupational HP were evaluated using clinical records from La Paz University Hospital (2014&#8211;2022). Data collected included exposure history, HRCT findings, IgG antibodies, BAL, biopsies, and treatment outcomes.  Results: Patients had a median age of 53.5 years (range: 15&#8211;75), with varied exposure to birds or indirect sources like feather duvets. Diagnosis was made based on HRCT, BAL, and biopsy findings. Five patients removed the antigen source, resulting in symptom improvement and pulmonary function in non-fibrotic cases. Corticosteroid treatment was given to all, with one patient requiring oxygen therapy. The median FEV1 improvement was 50 ml, and three patients with a non-fibrotic pattern showed improved DLCO after treatment.  Conclusions: Early diagnosis and antigen avoidance are key to managing hypersensitivity pneumonitis (HP), especially in cases of hidden bird-related exposures. A multidisciplinary approach improved outcomes, particularly in non-fibrotic cases. Larger studies and broader antigen testing are needed to validate these findings and enhance diagnostic accuracy.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Serie de casos de pacientes con neumonitis por hipersensibilidad doméstica, enfocándose en exposiciones aviares ocultas u otros antígenos no sospechosos (edredones y almohadas de plumas).  Métodos: Se evaluaron siete pacientes femeninas diagnosticadas con neumonitis por hipersensibilidad no ocupacional. Se utilizaron los registros clínicos del Hospital Universitario La Paz (2014-2022). Se recolectaron datos del antecedente de de exposición, hallazgos en HRCT, anticuerpos IgG, BAL, biopsias y resultados del tratamiento.  Resultados: Se registró una edad media de 53.5 años (rango: 15-75). Las pacientes tuvieron diversas exposiciones a aves o fuentes indirectas (edredones de plumas). El diagnóstico se basó en los hallazgos de HRCT, BAL y biopsia. Cinco pacientes eliminaron la fuente del antígeno, lo que resultó en la disminución de síntomas y mejora en la función pulmonar en los casos no fibrosos. Se administraron corticosteroides a todas, y una paciente requirió terapia con oxígeno. La mejora media del FEV1 fue de 50 mL, y tres pacientes con patrón no fibroso mostraron una mejora en la DLCO luego del tratamiento.  Conclusiones: El diagnóstico temprano y evitar el contacto con el antígeno son importantes en el tratamiento de pacientes con neumonitis por hipersensibilidad, especialmente en quienes tienen exposiciones ocultas relacionadas con aves. El enfoque multidisciplinario mejora los resultados, particularmente en casos no fibróticos. Se requieren estudios con muestras más grandes y que realicen pruebas de antígenos más diversas para validar estos hallazgos y mejorar la precisión diagnóstica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Alveolitis]]></kwd>
<kwd lng="en"><![CDATA[Extrinsic allergic]]></kwd>
<kwd lng="en"><![CDATA[Hypersensitivity pneumonitis]]></kwd>
<kwd lng="en"><![CDATA[Avian]]></kwd>
<kwd lng="en"><![CDATA[Lungs, feather duvet]]></kwd>
<kwd lng="en"><![CDATA[Interstitial lung disease]]></kwd>
<kwd lng="es"><![CDATA[Alveolitis]]></kwd>
<kwd lng="es"><![CDATA[Alérgica extrínseca]]></kwd>
<kwd lng="es"><![CDATA[Neumonitis por hipersensibilidad]]></kwd>
<kwd lng="es"><![CDATA[Aviar]]></kwd>
<kwd lng="es"><![CDATA[Pulmones, edredón de plumas]]></kwd>
<kwd lng="es"><![CDATA[Enfermedad pulmonar intersticial]]></kwd>
</kwd-group>
</article-meta>
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