Browsing by Author "Ceballos, María Elena"

Now showing 1 - 13 of 13
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    Corticosteroids use and risk of respiratory coinfections in mechanically ventilated patients with COVID-19
    (2021) Ceballos, María Elena; Núñez Palma, Carolina Verónica; Uribe, Javier; Vera Alarcón, María Magdalena; Castro López, Ricardo; García C., Patricia; Arriata, Gabriel; Gándara, Vicente; Vargas, Camila; Domínguez De Landa, María Angélica; Cerón, Inés; Born, Pablo; Espíndola, Eduardo
    Background: To describe respiratory coinfections, predictive factors and outcomes in patients requiring mechanical ventilation (MV) with COVID-19. Methods: Cohort study, carried out in a Chilean single tertiary Hospital. All patients with COVID-19 admitted to ICU that required MV were included between 1 June and 31 July 2020 Results: 175 patients were admitted to ICU and required MV. Of these, 71 patients developed at least one respiratory coinfection (40.6 %). Early coinfections and late coinfections were diagnosed in 1.7% and 31.4% of all patients admitted to ICU respectively. Within late coinfections, 88% were bacterial, 10% were fungal, and 2% were viral coinfections. One third of isolated bacteria were multidrug-resistant. Multivariate analysis showed that the risk for coinfection was 7.7 times higher for patients with history of corticosteroids (adOR = 7.65, CI 95%: 1.04-56.2, p=0,046) and 2.7 times higher for patients that received dexamethasone during hospitalization (adOR=2.69; CI 95%: 1.14-6.35, p=0,024) than patients that were not exposed. For each additional day in MV, the risk of coinfection increases 1.1 times (adOR=1.06; CI 95%: 1.01-1.11, p=0,025)
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    Cytomegalovirus encephalitis in the post-HAART era: is there a gold standard for treatment?
    (2018) Ceballos, María Elena; Rodriguez, Ignacio; Sandoval, Patricio; Abbott Cáceres, Eduardo Francisco; Labarca L., Jaime
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    Detección precoz de infección por citomegalovirus en pacientes sometidos a trasplante alogéneico de precursores hematopoyéticos por reacción de polimerasa en cadena cuantitativa en tiempo real
    (2014) Ceballos, María Elena; Vizcaya Altamirano, María Cecilia; Pavez, D.; Cerda, Jaime; Martínez Valdebenito, C.; Montecinos, L.; Ferrés Garrido, Marcela Viviana
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    Infección por virus herpes humano 6 en un paciente inmunocompetente con síndrome DRESS secundario a carbamazepina
    (2016) Alvarez, Sergio; Delama, Ignacio; Navajas Galimany, Lucas; Eymin Lago, Gonzalo; Ceballos, María Elena; Andino Navarrete, R.
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    Neurological soft signs (NSS) and cognitive deficits in HIV associated neurocognitive disorder
    (2020) Forno, G.; Henriquez, F.; Ceballos, María Elena; González Tugas, Matías; Schroder, J.; Toro Espinoza, Pablo Esteban
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    Neurological soft signs as a marker of cognitive impairment severity in people living with HIV
    (2018) Toro Espinoza, Pablo Esteban; Ceballos, María Elena; Pesenti, José; Inostroza, María; Valenzuela, Daniela; Henríquez, Fernando; Forno, Gonzalo; Herold, Christina; Schröder, Johannes; Calderón Pinto, Jorge
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    Respuesta virológica e inmunológica a la terapia anti-retroviral en pacientes portadores de infección por VIH. atendidos en una red de salud académica de Chile
    (2016) Ceballos, María Elena; Rojas González, Álvaro Miguel; Donato, Paulina; Huilcamán, Marcos; Rivera, Gonzalo; López, Tania; Gutiérrez, Catalina; Labarca L., Jaime; Pérez, Carlos
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    SARS-CoV-2 vaccine booster in solid organ transplant recipients previously immunised with inactivated versus mRNA vaccines: A prospective cohort study
    (2022) Dib Marambio, Martín Javier; Le Corre Pérez, Monique Nicole; Ortiz Koh, Catalina Alejandra; García, Daniel; Ferrés, Marcela; Martínez Valdebenito, Constanza; Ruiz-Tagle, Cinthya; Ojeda Valenzuela, María José; Espinoza Sepúlveda, Manuel Antonio; Jara Contreras, Aquiles; Arab Verdugo, Juan Pablo; Rabagliati B., Ricardo; Vizcaya Altamirano, Cecilia; Ceballos, María Elena; Sarmiento Maldonado, Mauricio; Mondaca Contreras, Sebastián Patricio; Viñuela Morales, Macarena Rocío; Pastore Thomson, Antonia; Szwarcfiter Neiman, Vania; Galdames Lavín, Elizabeth Alejandra; Barrera Vásquez, Aldo Vincent; Castro Gálvez, Pablo Federico; Gálvez Arriagada, Nicolás Marcelo Salvador; Soto Ramírez, Jorge Andrés; Bueno Ramírez, Susan; Kalergis Parra, Alexis Mikes; Nervi Nattero, Bruno; Balcells Marty, María Elvira
    Solid-organ transplant (SOT) recipients have worse COVID-19 outcomes than general population and effective immunisation in these patients is essential but more difficult to reach. We aimed to determine the immunogenicity of an mRNA SARS-CoV-2 vaccine booster in SOT recipients previously immunised with either inactivated or homologous SARS-CoV-2 mRNA vaccine. Methods: Prospective cohort study of SOT recipients under medical care at Red de Salud UC-CHRISTUS, Chile, previously vaccinated with either CoronaVac or BNT162b2. All participants received a BNT162b2 vaccine booster. The primary study end point was anti-SARS-CoV-2 total IgG antibodies (TAb) seropositivity at 8-12 weeks (56-84 days) post booster. Secondary end points included neutralising antibodies (NAb) and specific T-cell responses. Findings: A total of 140 (50% kidney, 38% liver, 6% heart) SOT recipients (mean age 54 [13.6] years; 64 [46%] women) were included. Of them, 62 had homologous (three doses of BNT162b2) and 78 heterologous vaccine schedules (two doses of CoronaVac followed by BNT162b2 booster). Boosters were received at a median of 21.3 weeks after primary vaccination. The proportion achieving TAb seropositivity (82.3% vs 65.4%, P = 0.035) and NAb positivity (77.4% vs 55.1%, P = 0.007) were higher for the homologous versus the heterologous group. On the other hand, the number of IFN-γ and IL-2 secreting SARS-CoV-2-specific T-cells did not differ significantly between groups. Interpretation: This cohort study shows that homologous mRNA vaccine priming plus boosting in SOT recipients, reaches a significantly higher humoral immune response than inactivated SARS-CoV-2 vaccine priming followed by heterologous mRNA booster.
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    Secondary respiratory early and late infections in mechanically ventilated patients with COVID-19
    (2022) Ceballos, María Elena; Nuñez, Ingrid; Uribe, Javier; Vera Alarcón, María Magdalena; Castro López, Ricardo; García C., Patricia; Arriata, Gabriel; Gándara, Vicente; Vargas Muñoz, Camila; Domínguez De Landa, María Angélica; Cerón, Inés; Born, Pablo; Espíndola, Eduardo
    Background: Patients with COVID-19 receiving mechanical ventilation may become aggravated with a secondary respiratory infection. The aim of this study was to describe secondary respiratory infections, their predictive factors, and outcomes in patients with COVID-19 requiring mechanical ventilation. Methods: A cohort study was carried out in a single tertiary hospital in Santiago, Chile, from 1st June to 31st July 2020. All patients with COVID-19 admitted to the intensive care unit that required mechanical ventilation were included. Results: A total of 175 patients were enrolled, of which 71 (40.6%) developed at least one secondary respiratory infection during follow-up. Early and late secondary infections were diagnosed in 1.7% and 31.4% respectively. Within late secondary infections, 88% were bacterial, 10% were fungal, and 2% were of viral origin. One-third of isolated bacteria were multidrug-resistant. Bivariate analysis showed that the history of corticosteroids used before admission and the use of dexamethasone during hospitalization were associated with a higher risk of secondary infections (p = 0.041 and p = 0.019 respectively). Multivariate analysis showed that for each additional day of mechanical ventilation, the risk of secondary infection increases 1.1 times (adOR = 1.07; 95% CI 1.02–1.13, p = 0.008) Conclusions: Patients with COVID-19 admitted to the intensive care unit and requiring mechanical ventilation had a high rate of secondary infections during their hospital stay. The number of days on MV was a risk factor for acquiring secondary respiratory infections.
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    Trasplante hepático exitoso en un paciente portador del Virus de la Inmunodeficiencia Humana (VIH): casos clínicos
    (2018) Guerra Castro, Juan Francisco; Troncoso T., Andrés; Ceballos, María Elena; Arrese Jiménez, Marco; Barrera Martínez, Francisco José; Norero, Blanca; Soza, Alejandro; Rivas, Violeta; Wolff, Rodrigo; Arias, Alejandra; Cancino, Alejandra; Torres Montes, Paula Javiera; Briceño, Eduardo; Jarufe Cassis, Nicolás; Martínez Castillo, Jorge; Benítez, Carlos
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    Vitamin D and Bone Mineral Density in HIV Newly Diagnosed Therapy-Naive Patients Without Any Secondary Causes of Osteoporosis
    (2019) Ceballos, María Elena; Carvajal, Camila; Jaramillo, Javier; Dominguez, Angelica; González Vicente, Gilberto