Maricela Valerio

Dr. Maricela Valerio

1. Clinical Microbiology and Infectious Diseases Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain
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orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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19 November 2020 in Mycoses
Verified
Journal Article
Open access
PDF file
MMMarina Machado
Marina Machado
Maricela ValerioMaricela Valerio
Maricela Valerio
AUAna Álvarez Uría
Ana Álvarez Uría
MSMARIA Olmedo Samperio
MARIA Olmedo Samperio
CVCristina Veintimilla
Cristina Veintimilla
TGThe COVID‐19 Study Group
The COVID‐19 Study Group
Objectives: Information on the recently COVID‐19‐associated pulmonary aspergillosis (CAPA) entity is scarce. We describe eight CAPA patients, compare them to colonised ICU patients with coronavirus disease 2019 (COVID‐19), and review the published literature from Western countries.Methods: Prospective study (March to May, 2020) that included all COVID‐19 patients admitted to a tertiary hospital. Modified AspICU and European Organization for Research and Treatment of Cancer/Mycoses Study Group (EORTC/MSG) criteria were used.Results: COVID‐19‐associated pulmonary aspergillosis was diagnosed in eight patients (3.3% of 239 ICU patients), mostly affected non‐immunocompromised patients (75%) with severe acute respiratory distress syndrome (ARDS) receiving corticosteroids. Diagnosis was established after a median of 15 days under mechanical ventilation. Bronchoalveolar lavage was performed in two patients with positive Aspergillus fumigatus cultures and galactomannan (GM) index. Serum GM was positive in 4/8 (50%). Thoracic CT scan findings fulfilled EORTC/MSG criteria in one case. Isavuconazole was used in 4/8 cases. CAPA‐related mortality was 100% (8/8). Compared with colonised patients, CAPA subjects were administered tocilizumab more often (100% vs. 40%, p = .04), underwent longer courses of antibacterial therapy (13 vs. 5 days, p = .008), and had a higher all‐cause mortality (100% vs. 40%, p = .04). We reviewed 96 similar cases from recent publications: 59 probable CAPA (also putative according modified AspICU), 56 putative cases and 13 colonisations according AspICU algorithm; according EORTC/MSG six proven and two probable. Overall, mortality in the reviewed series was 56.3%.Conclusions: COVID‐19‐associated pulmonary aspergillosis must be considered a serious and potentially life‐threatening complication in patients with severe COVID‐19 receiving immunosuppressive treatment.

1 April 2018 in International Journal of Antimicrobial Agents
Verified
Journal Article
Closed access
EBEmilio Bouza
Emilio Bouza
Maricela ValerioMaricela Valerio
Maricela Valerio
ASAlex Soriano
Alex Soriano
LMLaura Morata
Laura Morata
ECEnrique García Carus
Enrique García Carus
LSLuisa Sorlí
Luisa Sorlí

1 May 2015 in Clinical Microbiology and Infection
Verified
Journal Article
Closed access
Maricela ValerioMaricela Valerio
Maricela Valerio
PMPatricia Munoz
Patricia Munoz
CRC.G. Rodríguez
C.G. Rodríguez
BCB. Caliz
B. Caliz
BPB. Padilla
B. Padilla
EBE. Bouza
E. Bouza

1 September 2015 in Medicine
Verified
Journal Article
Open access
VEViviana de Egea
Viviana de Egea
PMPatricia Munoz
Patricia Munoz
Maricela ValerioMaricela Valerio
Maricela Valerio
AAArístides de Alarcón
Arístides de Alarcón
JLJosé Antonio Lepe
José Antonio Lepe
EBEmilio Bouza
Emilio Bouza
Streptococcus pneumoniae is an infrequent cause of severe infectious endocarditis (IE). The aim of our study was to describe the epidemiology, clinical and microbiological characteristics, and outcome of a series of cases of S. pneumoniae IE diagnosed in Spain and in a series of cases published since 2000 in the medical literature. We prospectively collected all cases of IE diagnosed in a multicenter cohort of patients from 27 Spanish hospitals (n = 2539). We also performed a systematic review of the literature since 2000 and retrieved all cases with complete clinical data using a pre-established protocol. Predictors of mortality were identified using a logistic regression model. We collected 111 cases of pneumococcal IE: 24 patients from the Spanish cohort and 87 cases from the literature review. Median age was 51 years, and 23 patients (20.7%) were under 15 years. Men accounted for 64% of patients, and infection was community-acquired in 96.4% of cases. The most important underlying conditions were liver disease (27.9%) and immunosuppression (10.8%). A predisposing heart condition was present in only 18 patients (16.2%). Pneumococcal IE affected a native valve in 93.7% of patients. Left-sided endocarditis predominated (aortic valve 53.2% and mitral valve 40.5%). The microbiological diagnosis was obtained from blood cultures in 84.7% of cases. In the Spanish cohort, nonsusceptibility to penicillin was detected in 4.2%. The most common clinical manifestations included fever (71.2%), a new heart murmur (55%), pneumonia (45.9%), meningitis (40.5%), and Austrian syndrome (26.1%). Cardiac surgery was performed in 47.7% of patients. The in-hospital mortality rate was 20.7%. The multivariate analysis revealed the independent risk factors for mortality to be meningitis (OR, 4.3; 95% CI, 1.4–12.9; P < 0.01). Valve surgery was protective (OR, 0.1; 95% CI, 0.04–0.4; P < 0.01). Streptococcus pneumoniae IE is a community-acquired disease that mainly affects native aortic valves. Half of the cases in the present study had concomitant pneumonia, and a considerable number developed meningitis. Mortality was high, mainly in patients with central nervous system (CNS) involvement. Surgery was protective.

1 July 2012 in Journal of Clinical Microbiology
Verified
Journal Article
Closed access
TPTeresa Pelaez
Teresa Pelaez
PGPaloma Gijón
Paloma Gijón
EBEleonora Bunsow
Eleonora Bunsow
EBEmilio Bouza
Emilio Bouza
WSWaldo Sánchez-Yebra
Waldo Sánchez-Yebra
EMEmilia Mellado
Emilia Mellado
A voriconazole-resistant isolate of Aspergillus fumigatus was recovered from an immunocompetent patient receiving long-term antifungal therapy for cerebral aspergillosis. A G448S amino acid substitution in the azole target (Cyp51A) was identified as the cause of the resistance phenotype. This article describes the first isolation of a voriconazole-resistant A. fumigatus isolate from an immunocompetent patient in Spain.

16 March 2022 in Journal of Fungi
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Journal Article
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PDF file
MMMarina Machado
Marina Machado
AEAGUSTIN ESTEVEZ
AGUSTIN ESTEVEZ
CSCarlos Sánchez-Carrillo
Carlos Sánchez-Carrillo
Jesus GuineaJesus Guinea
Jesus Guinea
Pilar EscribanoPilar Escribano
Pilar Escribano
PMPatricia Munoz
Patricia Munoz
There is scarce information on the actual incidence of candidemia in COVID-19 patients. In addition, comparative studies of candidemia episodes in COVID-19 and non-COVID-19 patients are heterogeneous. Here, we assessed the real incidence, epidemiology, and etiology of candidemia in COVID-19 patients, and compared them with those without COVID-19 (2020 vs. 2019 and 2020, respectively). We also genotyped all C. albicans, C. parapsilosis, and C. tropicalis isolates (n = 88), causing candidemia in both groups, providing for the first time a genotypic characterization of isolates gathered in patients with either COVID-19 or non-COVID-19. Incidence of candidemia was higher in patients with COVID-19 than non-COVID-19 (4.73 vs. 0.85 per 1000 admissions; 3.22 vs. 1.14 per 10,000 days of stay). No substantial intergroup differences were found, including mortality. Genotyping proved the presence of a low number of patients involved in clusters, allowing us to rule out rampant patient-to-patient Candida transmission. The four patients, involved in two clusters, had catheter-related candidemia diagnosed in the first COVID-19 wave, which demonstrates breaches in catheter management policies occurring in such an overwhelming situation. In conclusion, the incidence of candidemia in patients with COVID-19 is significantly higher than in those without COVID-19. However, genotyping shows that this increase is not due to uncontrolled intrahospital transmission.