Publications by authors named "Ricardo Castellanos"

Pathogenic gram-negative bacteria frequently carry genes encoding extended-spectrum beta-lactamases (ESBL) and/or carbapenemases. Of great concern are carbapenem resistant , , and . Despite the need for rapid AMR diagnostics globally, current molecular detection methods often require expensive equipment and trained personnel.

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Unlabelled: The dissemination of multidrug-resistant (MDR) STc131 is related to its persistence in the human gastrointestinal tract as efficient gut colonizers. Infection and prevention measures are the cornerstones for preventing STc131 spread. Oral decolonization therapies that target ST131 are being developed.

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Salmonella enterica serovar Paratyphi B variant Java sequence type 28 is prevalent in poultry and poultry meat. We investigated the evolutionary relatedness between sequence type 28 strains from Europe and Latin America using time-resolved phylogeny and principal component analysis. We sequenced isolates from Colombia, Guatemala, Costa Rica, and the Netherlands and complemented them with publicly available genomes from Europe, Africa, and the Middle East.

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Salmonella Paratyphi B dT+ variant (also termed Salmonella Java) and Salmonella Heidelberg are pathogens of public health importance that are frequently isolated from poultry. As a step toward implementing the Colombian Integrated Program for Antimicrobial Resistant Surveillance, this study characterized molecular patterns of Salmonella Paratyphi B dT+ and Salmonella Heidelberg isolated from poultry farms, fecal samples, and retail chicken meat using pulsed-field gel electrophoresis (PFGE). The objective of this study was to determine the genetic relationship among isolates and to determine potential geographically predominant genotypes.

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As a step toward implementing the Colombian Integrated Program for Antimicrobial Resistance Surveillance (COIPARS), this study aimed to establish the baseline antimicrobial resistance patterns of Salmonella serovars, Escherichia coli, and Enterococcus spp. isolates in retail poultry meat from independent stores and from a main chain distributor center. MICs of the isolates were determined for antimicrobials used both in humans and animals, using an automated system.

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Background: Hospital personnel of services related to donation and transplantation process play a fundamental role in the development of transplantation.

Objectives: The aim of this study was to investigate the attitude toward living liver donation (LLD) among hospital personnel from services related to donation and transplantation in hospital centers in Spain and Latin America.

Materials And Methods: Eight hospitals within the "International Donor Collaborative Project" were selected, three in Spain, three in Mexico and two in Cuba.

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Background: The knowledge and acceptance of the concept of brain death (BD) among health care personnel is fundamental.

Objective: To analyze the level of understanding of the BD concept among personnel in Spanish and Latin American healthcare centers and to determine the factors affecting this attitude.

Material And Methods: Data from 12 hospitals and 32 primary care centers in 4 countries within the International Collaborative Donor Project were selected (Spain, Mexico, Cuba and Costa Rica (n=4378)).

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Background: Living kidney donation (LKD) is becoming increasingly necessary as a treatment option for reducing the deficit in transplant organs. Hospital personnel in services related to donation and transplantation play a key role in promoting this kind of donation.

Objective: To analyze the attitude toward LKD among hospital workers in services related to donation and transplantation in Spain and Latin America.

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The objective of this study was to determine Salmonella counts, serovars, and antimicrobial-resistant phenotypes on retail raw chicken carcasses in Colombia. A total of 301 chicken carcasses were collected from six departments (one city per department) in Colombia. Samples were analyzed for Salmonella counts using the most-probable-number method as recommended by the U.

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Background: Xenotransplantation is still a long way from becoming a clinical reality. However, in an emergency situation, it could be used as a bridge for replacing vital organs until the arrival of a human organ. To analyze the attitude toward xenotransplantation among hospital personnel from several hospitals in Spain and Latin America.

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