Publications by authors named "Norma E Rivera-Martinez"

Article Synopsis
  • - The study examined Clostridioides difficile infection (CDI) trends and outcomes in 16 healthcare facilities in Mexico from 2016 to 2022, focusing on patient demographics and clinical data.
  • - Out of 2,356 CDI cases identified, 90% were healthcare-associated, with common comorbidities including hypertension and diabetes; the 30-day mortality rate was 16%.
  • - The findings highlight the need for improved surveillance and standardized CDI classification in Mexico, noting stable rates but differences in incidence between public and private hospitals.
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Background: Phase III clinical trials have documented the efficacy of the SARS-CoV-2 vaccines in preventing symptomatic COVID-19. Nonetheless, it is imperative to continue analyzing the clinical response to different vaccines in real-life studies. Our objective was to evaluate the effectiveness of five different vaccines in hospitalized patients with COVID-19 during the third COVID-19 outbreak in Mexico dominated by the Delta variant.

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Background: We evaluated clinical effectiveness of regdanvimab (CT-P59), a severe acute respiratory syndrome coronavirus 2 neutralizing monoclonal antibody, in reducing disease progression and clinical recovery time in patients with mild-to-moderate coronavirus disease 2019 (COVID-19), primarily Alpha variant.

Methods: This was phase 3 of a phase 2/3 parallel-group, double-blind, randomized clinical trial. Outpatients with mild-to-moderate COVID-19 were randomized to single-dose regdanvimab 40 mg/kg (n = 656) or placebo (n = 659), alongside standard of care.

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Introduction: The novel coronavirus pandemic (COVID-19) represents a major public health problem and it is key to find a treatment that reduces mortality. Our objective was to estimate whether treatment with 400 mg/day of Hydroxychloroquine for 10 days reduces in-hospital mortality in subjects with severe respiratory disease due to COVID-19 compared with placebo.

Material And Methods: A double-blind, randomized, placebo-controlled trial to evaluate the safety and efficacy of Hydroxychloroquine for the treatment of severe disease by COVID-19 through an intention-to-treat analysis.

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Substantial COVID-19 research investment has been allocated to randomized clinical trials (RCTs) on hydroxychloroquine/chloroquine, which currently face recruitment challenges or early discontinuation. We aim to estimate the effects of hydroxychloroquine and chloroquine on survival in COVID-19 from all currently available RCT evidence, published and unpublished. We present a rapid meta-analysis of ongoing, completed, or discontinued RCTs on hydroxychloroquine or chloroquine treatment for any COVID-19 patients (protocol: https://osf.

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  • A multicenter study in Mexico aimed to evaluate the effectiveness of various tests for diagnosing progressive disseminated histoplasmosis (PDH) in individuals living with HIV.
  • The study involved 415 participants and compared the diagnostic accuracy of urine antigen tests and nested PCR methods, confirming PDH through blood, tissue cultures, or histopathology.
  • Results showed that the cHGEI IMMY test had the highest sensitivity (91.3%) among the urine tests, while nested PCR tests demonstrated varying sensitivity levels, indicating different diagnostic strengths for identifying this serious infection.
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Article Synopsis
  • The study evaluates the diagnostic accuracy of the ALPHA Histoplasma urine antigen (HUAg) test for detecting progressive disseminated histoplasmosis (PDH) in HIV patients, particularly in Mexico.
  • In a sample of 288 patients suspected of having PDH, the ALPHA-HUAg showed a sensitivity of 67.1% and a high specificity of 97.5%, indicating it is fairly good at confirming PDH but may miss some cases.
  • Despite its high specificity, the low sensitivity means that ALPHA-HUAg can't be solely relied on for diagnosis, and a culture-based approach is recommended to account for potential co-infections.
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In individuals with HIV/AIDS, 47% of the deaths are attributed to invasive fungal infections (IFIs), despite antiretroviral (ARV) therapy. This is a retrospective study carried out in the Hospital Regional de Alta Especialidad Oaxaca (HRAEO), southwest Mexico, where IFIs that occurred during 2016⁻2017 are described. A total of 55 individuals were included.

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Objectives: The 2009-2010 influenza A (H1N1pdm09) pandemic caused substantial morbidity and mortality among young patients; however, mortality estimates have been confounded by regional differences in eligibility criteria and inclusion of selected populations. In 2013-2014, H1N1pdm09 became North America's dominant seasonal influenza strain. Our objective was to compare the baseline characteristics, resources, and treatments with outcomes among critically ill patients with influenza A (H1N1pdm09) in Mexican and Canadian hospitals in 2014 using consistent eligibility criteria.

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Article Synopsis
  • Anal cancer is increasingly common among HIV+ individuals, particularly Men who have Sex with Men (MSM), despite treatments like HAART; high HPV infection rates among this group contribute to the issue.
  • A study involving 324 HIV+ MSM in Mexico City revealed a staggering 86% prevalence of HPV, with 28% testing positive for HPV type 16, the most notable variant.
  • The findings highlight the critical need for early detection and monitoring of HPV infections in HIV+ MSM to prevent anal neoplasia and cancer.
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