Publications by authors named "Calderon J"

: While it is generally assumed that common neurobehavioral assessments, such as the Wechsler Adult Intelligence Scale, Fourth Edition (WAIS-IV), function similarly in clinical and non-clinical populations, this has not been validated in adults with congenital heart disease (CHD). In this study, we examined the latent factor structure of the WAIS-IV in adults with d-transposition of the great arteries (d-TGA) who participated in the Boston Circulatory Arrest Study. : The WAIS-IV was administered as part of a larger assessment battery.

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The concept of mental symptom is constructed considering not only the biological signal that determines it, but the multilayered causative factors related to intersubjective experience. However, specific brain damage might produce a set of symptoms expressed in a recognizable gestalt that helps to differentiate organic of psychogenic causation. The legacy of the theory of mental symptoms developed by German Berrios and the seminal work of Hughlings Jackson and Kurt Goldstein can contribute to this difficult task.

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Leptospirosis is a neglected zoonotic disease that is endemic in tropical regions, including Ecuador. It is caused by spirochetes of the genus , which can infect humans through animal reservoirs such as rats and dogs, or through contact with contaminated water or soil. In March 2023, public health authorities declared a concerning outbreak of leptospirosis in Durán Cantón, located in the Coastal region of Ecuador.

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Background: The occurrence of secondary vascular pathology in paragangliomas is extremely rare, particularly in carotid body tumors (CBTs).

Case Description: A 73-year-old female presented with computed tomography angiography revealing a right CBT with a large intratumoral contrast collection. Digital subtraction angiography confirmed a CBT with an internal carotid artery (ICA) intratumoral pseudoaneurysm.

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Transport intoxication in the form of body stuffing, a dangerous practice involving the ingestion or insertion of psychoactive substances into the body to evade detection during drug trafficking, represents a major medical problem that requires immediate attention in the emergency department. Unlike body packing, where substances are encapsulated and swallowed for later extraction, body stuffing involves direct ingestion without wrapping, which greatly increases the risk of serious intoxication and even death. Benzodiazepines, due to their high demand on the black market, are among the most common drugs used in body stuffing.

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Introduction: In the developing brain, neurons extend an axonal process through a complex and changing environment to form synaptic connections with the correct targets in response to extracellular cues. Microtubule and actin filaments provide mechanical support and drive axon growth in the correct direction. The axonal cytoskeleton responds to extracellular guidance cues.

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The present work examines the relationship between aerial spraying and its health impacts on the population living in the banana production areas of Ecuador (the rural sectors of the cantons Milagro and Naranjito, Guayas Province). : the objectives of this study are to obtain information on sanitation, basic services, and environmental rationality and to interpret the low levels of cholinesterase and prevalent diseases among the population. the methodology involved a face-to-face questionnaire, the formal authorization of an informed consent document, and venipuncture for cholinesterase tests.

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  • - Williams-Campbell syndrome (WCS) is a rare disorder typically seen in children but can also affect adults, making diagnosis complicated due to its similarity to other respiratory conditions.
  • - Two adult cases were presented: one involved a 53-year-old with recurrent sinus issues and COVID-19-related lung cysts, and the other a 59-year-old cyclist with lung bullae, both requiring extensive evaluations before being diagnosed with WCS.
  • - Management for these patients focused on managing symptoms and vaccination, with an emphasis on recognizing the condition early and using clinical and radiological findings for a timely diagnosis.
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  • * Laboratory analysis of infected plant tissues revealed the presence of Sclerotinia sp., specifically S. minor, through morphological and DNA sequencing methods, confirming its identity with 99-100% match in genetic markers.
  • * Pathogenicity tests using the S. minor isolate CS435 showed successful plant infection in a greenhouse setting, indicating the pathogen's significant impact on the health of Scabiosa crops.
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  • Pediatric patients with recurrent oto-sinopulmonary infections often show low antibody levels to the pneumococcal vaccine (PCV13), prompting the need for a booster shot.
  • A study of 182 patients found that those who received the PCV13 booster showed a significant increase in protective antibody levels, going from an average of 3.6 to 11.1 serotypes within 6 weeks post-immunization.
  • Most patients experienced positive clinical outcomes, with 81% showing no recurrent infections after the first booster and 94% after a second, indicating the booster is highly effective for children across various ages.
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The effect of peptide toxins on voltage-gated ion channels can be reliably assessed using electrophysiological assays, such as the patch-clamp technique. However, much of the toxinological research done in Central and South America aims at purifying and characterizing biochemical properties of the toxins of vegetal or animal origin, lacking electrophysiological approaches. This may happen due to technical and infrastructure limitations or because researchers are unfamiliar with the techniques and cellular models that can be used to gain information about the effect of a molecule on ion channels.

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  • The study aimed to assess how well the Systemic Lupus Erythematosus Risk Probability Index (SLERPI) performs in diagnosing systemic lupus erythematosus (SLE) among Colombian patients, comparing it with established diagnostic criteria.
  • Researchers collected data from 435 SLE patients and 430 control subjects with other autoimmune diseases, finding that SLE patients had significantly higher SLERPI scores, with key influential factors including immunological disorders and specific skin symptoms.
  • SLERPI showed high sensitivity in identifying SLE, particularly for hematological and renal forms, but had lower specificity compared to traditional criteria, indicating it might be more effective in ruling out SLE rather than confirming it.
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Background: Following the initial acute phase of COVID-19, health care resource use has escalated among individuals with SARS-CoV-2 infection.

Objective: This study aimed to compare new diagnoses of long COVID and the demand for health services in the general population after the Omicron wave with those observed during the pre-Omicron waves, using similar assessment protocols for both periods and to analyze the influence of vaccination.

Methods: This matched retrospective case-control study included patients of both sexes diagnosed with acute SARS-CoV-2 infection using reverse transcription polymerase chain reaction or antigen tests in the hospital microbiology laboratory during the pandemic period regardless of whether the patients were hospitalized.

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Human-to-animal reverse transmission of SARS-CoV-2 is a risk for new reservoirs' emergence and new variants' evolution. SARS-CoV-2 infection of synanthropic rodents in urban settings has been reported during COVID-19 in New York and Mexico cities. In this study, we addressed the potential transmission of SARS-CoV-2 to synanthropic rats in the city of Guayaquil (Ecuador) during the COVID-19 pandemic.

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Background: ChatGPT was not intended for use in health care, but it has potential benefits that depend on end-user understanding and acceptability, which is where health care students become crucial. There is still a limited amount of research in this area.

Objective: The primary aim of our study was to assess the frequency of ChatGPT use, the perceived level of knowledge, the perceived risks associated with its use, and the ethical issues, as well as attitudes toward the use of ChatGPT in the context of education in the field of health.

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Background: Myonectin is a myokine with potential effects on the lipid metabolism; however, its regulation by exercise in humans remains unclear. We aimed to compare the efficacy of high-intensity interval training low-volume (HIIT) versus moderate-intensity continuous training (MICT) on serum myonectin, serum lipids, appendicular fat and lean mass, and intramuscular lipids in humans.

Methods: Secondary analysis of a controlled, randomized, clinical trial in adults of both sexes with metabolic syndrome, who underwent a supervised, three-times/week, 12-week treadmill program.

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  • Anal cancer is primarily caused by HPV, especially HPV-16, and often develops from anal high-grade squamous intraepithelial lesions (HSILs), with the highest incidence seen in men who have sex with men (MSM) living with HIV, particularly those over 50 years old.
  • A study conducted in San Francisco between 2018 and 2022 found high rates of anal HSIL and oncogenic HPV among older MSM, regardless of HIV status; 47% of MSM living with HIV and 37% of MSM not living with HIV had anal HSIL.
  • The results suggest that there is a significant prevalence of high-risk anal HPV types in this age group, indicating a need for anal cancer screening
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As detailed information on the pharmacokinetics (PK) of labetalol in pregnant people are lacking, the aims of this study were: (1) to build a physiologically based PK (PBPK) model of labetalol in non-pregnant individuals that incorporates different CYP2C19 genotypes (specifically, *1/*1, *1/*2 or *3, *2/*2, and *17/*17); (2) to translate this model to the second and third trimester of pregnancy; and (3) to combine the model with a previously published direct pharmacodynamic (PD) model to predict the blood pressure lowering effect of labetalol in the third trimester. Clinical data for model evaluation was obtained from the scientific literature. In non-pregnant populations, the mean ratios of simulated versus observed peak concentration (C), time to reach C (T), and exposure (area under the plasma concentration-time curve, AUC) were 0.

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  • The genus Bartonella consists of Gram-negative bacilli that can infect various mammals, including cats and humans; a recent outbreak of cat scratch disease linked to B. henselae was reported in Guayaquil, Ecuador in 2022.
  • Researchers collected blood samples from 100 domestic and stray cats in the outbreak area to identify the presence of Bartonella spp. through genetic testing.
  • Results showed that 14 cats were carrying Bartonella spp., with 12 infected by B. henselae and 2 by B. clarridgeiae, highlighting the need for a One Health approach to manage and prevent zoonotic diseases in the region.
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The development of nanoribbon-like structures is an effective strategy to harness the potential benefits of graphenic materials due to their excellent electrical properties, advantageous edge sites, rapid electron transport, and large specific area. Herein, parallel and connected magnetic nanostructured nanoribbons are obtained through the synthesis of reduced graphene oxide (rGO) using NiCl as a precursor with potential applications in nascent electronic and magnetic devices. Several analytical techniques have been used for the thorough characterization of the modified surfaces.

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  • The study aimed to explore the use of topical cannabis as a pain relief method for patients with various inflammatory diseases at Salud Social I.P.S from May to July 2023.
  • A total of 23 patients with conditions like arthritis, goiter, and carpal tunnel syndrome were analyzed, and results showed that most experienced pain relief after two months.
  • While the study supports the analgesic properties of cannabis, it emphasizes the need for more research to thoroughly understand its effects and benefits in treating inflammatory diseases.
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  • The study evaluated the safety and effectiveness of isavuconazole in treating non-neutropenic patients with invasive fungal infections (IFIs) across 12 university hospitals from 2018 to 2022.
  • A total of 238 cases were analyzed, with aspergillosis being the most common infection, and only 5.9% of patients experienced toxic effects, mostly related to liver issues.
  • The treatment showed a successful clinical response in about 50.5% of patients after 12 weeks, indicating isavuconazole is a viable option for this patient group.
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