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    Meningitis por Listeria monocytogenes en paciente adulto mayor: Listeria monocytogenes meningitis in elderly patient

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    Listeria monocytogenes meningitis is a serious and life-threatening disease. It is the third cause of bacterial meningitis, despite being rare. Newborns, elderly, pregnant women and immunocompromised patients are the most affected population. We present the case of a 70-year-old patient with a history of high blood pressure, non-active thyroid cancer, with sporadic food intake outside the home, who is admitted with a 5-day-of-evolution fever syndrome, slight headache and inappetence. On clinical examination, she presented mild to moderate neck stiffness, without significant radiological findings in the central nervous system. She started empirical antibiotic treatment, which was continued for 4 weeks, obtaining both blood culture and cerebrospinal fluid culture positive result for Listeria monocytogenes. The importance of considering this etiology in the diagnosis of meningitis in the adult population is discussed, since an epidemiological change of its virulence towards adult populations could be occurring.La meningitis por Listeria monocytogenes es una enfermedad grave y potencialmente mortal. Es la tercera causa de meningitis bacteriana, a pesar de ser poco frecuente. Los reci茅n nacidos, adultos mayores, gestantes y pacientes inmunocomprometidos son la poblaci贸n m谩s afectada. Se presenta el caso de una paciente de 70 a帽os con antecedente de hipertensi贸n arterial, c谩ncer de tiroides no activo e ingesta espor谩dica de alimentos fuera de casa; que ingresa con s铆ndrome febril de 5 d铆as de evoluci贸n, leve cefalea e inapetencia. Al examen cl铆nico present贸 leve a moderada rigidez de nuca, sin hallazgos radiol贸gicos significativos en el sistema nervioso central. Empez贸 tratamiento antibi贸tico emp铆rico, que fue continuado por cuatro semanas al obtener resultado de hemocultivo y cultivo de l铆quido cefalorraqu铆deo positivos a Listeria monocytogenes. Se discute la importancia de considerar esta etiolog铆a en los diagn贸sticos de meningitis en la poblaci贸n adulta, ya que podr铆a estar ocurriendo un cambio epidemiol贸gico de su virulencia hacia poblaciones adultas. &nbsp
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