Publications by authors named "Alfredo Ponce-De-Leon-Garduno"

We analyzed the antimicrobial resistance (AMR) data of 6519 clinical isolates of ( = 3985), ( = 775), ( = 163), ( = 781), ( = 124), and ( = 691) from 43 centers in Mexico. AMR assays were performed using commercial microdilution systems (37/43) and the disk diffusion susceptibility method (6/43). The presence of carbapenemase-encoding genes was assessed using PCR.

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Cancer patients with infection (CDI) are at a higher risk for adverse outcomes. In addition, a high prevalence of asymptomatic colonization (CDAC) has been reported in this vulnerable population. The molecular characteristics and potential role of CDAC in healthcare-related transmission in the cancer population have been poorly explored.

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Article Synopsis
  • A study examined the outcomes of mechanically ventilated COVID-19 patients in temporary versus conventional ICUs, focusing on mortality and ICU management from March 2020 to April 2021.
  • Findings revealed that patients in temporary ICUs had a higher unadjusted 30-day in-hospital mortality rate (36.0%) compared to conventional ICUs (28.8%), indicating that temporary ICU settings may pose additional risks.
  • Despite differences in mortality rates, the study found no significant differences in ventilator-free days or ICU-free days, though reintubation and readmission rates were higher in conventional ICUs.
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Purpose: To describe the antimicrobial use in four tertiary care hospitals in Mexico.

Patients And Methods: Point prevalence surveys (PPSs) were conducted on medical records of hospitalized patients with prescribed antimicrobials (AMs) in four tertiary care hospitals in Mexico in 2019. Prevalence estimates and descriptive statistics were used to present the collected data on antimicrobial prescribing and microbiological studies.

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Antimalarial drugs were widely used as experimental therapies against COVID-19 in the initial stages of the pandemic. Despite multiple randomized controlled trials demonstrating unfavorable outcomes in both efficacy and adverse effects, antimalarial drugs are still prescribed in developing countries, especially in those experiencing recurrent COVID-19 crises (India and Brazil). Therefore, real-life experience and pharmacovigilance studies describing the use and side effects of antimalarials for COVID-19 in developing countries are still relevant.

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Bovine tuberculosis (bTB) is mainly caused by Mycobacterium bovis. In Mexico, dairy cattle play an important role in the persistence and spread of the bacillus. In order to describe M.

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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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Tuberculosis is one of the 10 leading causes of death in the world. The current treatment is based on a combination of antimicrobials administered for six months. It is essential to find therapeutic agents with which the treatment time can be shortened and strengthen the host immune response against .

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  • The study aimed to determine clinical and environmental factors linked to outbreaks of hospital-onset Clostridium difficile infection (HO-HCFA CDI) among hospitalized patients in Mexico from 2015 to 2016.
  • Researchers used a case-control design, comparing 155 patients with HO-HCFA CDI to 310 controls randomly selected from hospital discharge records.
  • Significant risk factors identified included recent use of ciprofloxacin and proton pump inhibitors, having febrile neutropenia, intra-abdominal infections, being referred from other hospitals, and a higher number of prior antibiotics used.
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Background: Human tuberculosis caused by M. bovis is a zoonosis presently considered sporadic in developed countries, but remains a poorly studied problem in low and middle resource countries. The disease in humans is mainly attributed to unpasteurized dairy products consumption.

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Introduction: Clostridium difficile-associated disease (CDAD) has been clearly associated with the use of broad-spectrum antibiotics worldwide. However, information about CDAD is scarce in Mexico and Latin America.

Material And Methods: We studied clinical characteristics, associated factors and outcomes of all cases of CDAD diagnosed by toxin A fecal detection in a tertiary care hospital in Mexico City from 2003 to 2007.

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Background: The use of fluoroquinolone prophylaxis in patients with cancer and neutropenia has failed to show a significant impact on mortality, despite its usefulness in reducing the incidence of gramnegative bacteremia. However, an increase in grampositive bacteremia and the emergence of resistant colonizing bacteria have consistently been noticed.

Objective: To determine the impact of prophylaxis with fluoroquinolones on the incidence of bacteremia and mortality in a hospital with high fluorquinolone resistance in Mexico City.

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Background: Risk factors for development of atherosclerosis, such as hyperlipidemia, high blood pressure, smoking habit, and diabetes mellitus, have been identified. The possibility that infectious agents may unchain biological and biochemical reactions related to inflammation, atherogenesis, and vascular thromboses events have recently been described. Chlamydia pneumoniae has been associated with coronary artery disease in some seroepidemiology studies.

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