Teresa Azócar A

Pontifical Catholic University of Chile, CiudadSantiago, Santiago, Chile

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Publications (5)2.26 Total impact

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    ABSTRACT: Introducción: Las infecciones respiratorias virales (IRV) son causa importante de morbilidad en adultos. Virus respiratorio sincicial (VRS) causa hasta 20% de las IRV en esta edad; sin embargo, su diagnóstico es subestimado debido a una menor sensibilidad de las técnicas diagnosticas convencionales (IF y ELISA). Objetivos: Evaluar el impacto del uso de reacción de la polimerasa en cadena en tiempo real (TR-RPC en tiempo real) en el diagnóstico de IRV por VRS en adultos y caracterizar su perfil clínico. Pacientes y Métodos: Durante ocho semanas del año 2005, los adultos hospitalizados en Hospital Clínico de la Universidad Católica con sospecha de IRV, e IFD negativa para VRS, FLU-A, -B, paraFLU-1, 2, 3 y ADV de muestra de hisopado nasofaríngeo, fueron sometidos a detección de VRS por TR-RPC en tiempo real. Se confeccionó una base de datos con los antecedentes clínicos, laboratorio y evolución de cada paciente. Resultados: De 114 pacientes con IFD negativa en 17 (14,9%) se detectó VRS. Fiebre, congestión faríngea, tos y signos de obstrucción bronquial, configuraron en más de 80% de los casos el perfil clínico de los pacientes. Treinta por ciento presentaba enfermedad crónica y 47% eran inmunocomprometidos. Tres de 17 (18%) presentaron descompensación de la enfermedad de base y 1/17 (6%) requirió ventilación mecánica. No hubo mortalidad asociada. Conclusiones: El uso de TR-RPC en tiempo real permitió duplicar la detección de infecciones por VRS en adultos hospitalizados respecto a las diagnosticadas por IFD. Se recomienda considerar el empleo la técnica de TR-RPC en tiempo real en aquellos pacientes con sospecha clínica de VRS durante la temporada de VRS y estudio viro lógico negativo por métodos convencionales.
    Revista chilena de infectologia: organo oficial de la Sociedad Chilena de Infectologia 12/2007; 24(6):441-445. · 0.45 Impact Factor
  • Javier López Del P, Katia Abarca V, Teresa Azócar A
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    ABSTRACT: Rickettsial infections in pets have not been documented in Chile. Some of those infections have relevant zoonotic potential. To report two serologically confirmed cases of canine rickettsiosis. To determine seroprevalence to Rickettsia sp in a group of dogs. IgG antibodies anti-R. conorii and anti-A. phagocitophilum by IFI in two dogs with clinical rickettsiosis. IgG antibodies anti-R. conorii in a group of 77 dogs. Clinical Cases: a dog presented with fever, myalgias and melena, another dog with bleeding and neurological involvement. Seroprevalence: 35% of the dogs had antibodies against Rickettsia. This is the first evidence of canine rickettsiosis in Chile, both clinical and serological. Co-infection with two tickborne agents: Rickettsia and Anaplasma, is documented. Molecular studies are needed to confirm the rickettsial species present in Chile. The zoonotic role of these infections must be also studied.
    Revista chilena de infectologia: organo oficial de la Sociedad Chilena de Infectologia 07/2007; 24(3):189-93. · 0.45 Impact Factor
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    Javier López Del P, Katia Abarca V, Teresa Azócar A
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    ABSTRACT: En Chile, no se han documentado infecciones por Rickettsias en mascotas; algunas de ellas tienen importante potencial zoonótico. Objetivos: Reportar dos casos de rickettsiosis canina con confirmación serológica y determinar seroprevalencia de Rickettsia sp un grupo de caninos. Métodos: IgG anti-Rickettsia conorii y anti-Anaplasma phagocitophilum por IFI en dos caninos con cuadro clínico sugerente de rickettsiosis. Determinación de IgG anti-R. conorii en 77 caninos. Resultados: Como casos clínicos hubo un canino con fiebre, mialgias y melena y otro con manifestaciones he-morrágicas y compromiso neurológico. Seroprevalencia: 35% de los caninos presentaban IgG anti-Rickettsia. Discusión: Se reporta por primera vez en Chile la presencia de rickettsiosis canina, tanto clínica como serológica. Se documenta co-infección por Rickettsia y Anaplasma, dos agentes transmitidos por garrapatas. Es necesario realizar estudios de biología molecular para confirmar la especie de rickettsia presente en Chile. Además, debe estudiarse el rol zoonótico de estas infecciones en nuestro medio.
    Revista chilena de infectologia: organo oficial de la Sociedad Chilena de Infectologia 01/2007; 24(3). · 0.45 Impact Factor
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    ABSTRACT: During yearly influenza (FLU) season, FLU viruses are well represented among hospitalized patients as in the community. Also, other respiratory viruses could be represented among adult in-patients. Aim: to describe the presence and clinical- epidemiological characteristics of non-FLU respiratory virus infections (respiratory syncytial-RSV, parainfluenza and adenovirus-ADV) among hospitalized adults during FLU season and to compare with FLU-A (IA) or -B (IB) cases. Adult patients hospitalized at Hospital Clínico Universidad Católica between May to July 2004 with a respiratory virus infections confirmed by rapid antigen test or direct immunofluorescence of IA, IB (Flu group) or RSV, parainfluenza (1-2-3) and ADV (non-Flu group) were included. 86 cases were identified: 73.5% FLU (48.2% IA, 25.3% IB) and 26.5% non-FLU (15.7% parainfluenza-2; 8.4% RSV; 1.2% parainfluenza-3; 1.2% ADV). No differences were observed in general characteristics and evolution of patients. In FLU-group were more frequently observed myalgia, cough, hospitalization due to febrile syndrome, higher values of C-reactive protein and band leukocytes count (p < 0.05). During 2004 FLU season a 26.5 % of respiratory viral infection were due to non-FLU viruses among adult hospitalized in our centre. The difficulty to difference FLU vs. non-FLU infections, suggest that it is necessary to include other respiratory virus in the viral etiological diagnosis, even in FLU season.
    Revista chilena de infectologia: organo oficial de la Sociedad Chilena de Infectologia 06/2006; 23(2):111-7. · 0.45 Impact Factor
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    ABSTRACT: Background: During yearly influenza (FLU) season, FLU viruses are well represented among hospitalized patients as in the community. Also, other respiratory viruses could be represented among adult in-patients. Aim: to describe the presence and clinical- epidemiological characteristics of non-FLU respiratory virus infections (respiratory syncytial-RSV, parainfluenza and adenovirus-ADV) among hospitalized adults during FLU season and to compare with FLU-A (IA) or -B (IB) cases. Patients and Methods: Adult patients hospitalized at Hospital Clínico Universidad Católica between May to July 2004 with a respiratory virus infections confirmed by rapid antigen test or direct immunofluorescence of IA, IB (Flu group) or RSV, parainfluenza (1-2-3) and ADV (non-Flu group) were included. Results: 86 cases were identified: 73.5% FLU (48.2% IA, 25.3% IB) and 26.5% non-FLU (15.7% parainfluenza-2; 8.4% RSV; 1.2% parainfluenza-3; 1.2% ADV). No differences were observed in general characteristics and evolution of patients. In FLU-group were more frequently observed myalgia, cough, hospitalization due to febrile syndrome, higher values of C- reactive protein and band leukocytes count (p < 0.05). Conclusions: During 2004 FLU season a 26.5 % of respiratory viral infection were due to non-FLU viruses among adult hospitalized in our centre. The difficulty to difference FLU vs. non-FLU infections, suggest that it is necessary to include other respiratory virus in the viral etiological diagnosis, even in FLU season.
    Revista chilena de infectologia: organo oficial de la Sociedad Chilena de Infectologia 06/2006; 23(2):111-117. · 0.45 Impact Factor