Avances en el conocimiento de la patogenicidad de Clostridioides difficile
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2026
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26/09/2025
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Universidad Complutense de Madrid
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Clostridioides difficile (C. difficile) es una bacteria grampositiva, anaeróbica estricta, capaz de formar esporos. Su acción patógena se debe a la producción de las toxina A, By, en cepas hipervirulentas, de la toxina binaria (CDT). C. difficile es un patógeno entérico relevante en diversas especies animales y en humanos. Asimismo, se considera la principal causa de diarrea asociada al uso de antibióticos y a infecciones nosocomiales en humanos. Su creciente importancia como patógeno zoonótico representa una amenaza para la salud pública, debido al aumento en las resistencias a antibióticos y a la aparición de cepas hipervirulentas asociadas con infecciones graves, altas tasas de recurrencias y mortalidad. En España, el gasto anual por infecciones por C. difficile en humanos asciende a aproximadamente 41,8 millones de euros. Los cambios epidemiológicos de esta enfermedad subrayan la necesidad de estudiar la relación entre las cepas aisladas en humanos y animales y caracterizar cepas de origen animal, ya que a pesar de la importancia de la infección por C. difficile en animales, no se han publicado directrices sobre la detección y el control de este patógeno. Por este motivo, nos propusimos profundizar en la comprensión de la patogenicidad de C. difficile mediante la caracterización de cepas de distintos ribotipos y toxinotipos...
Clostridioides difficile (C. difficile) is a Gram-positive, strictly anaerobic, spore-forming bacterium. Its pathogenic action is attributed to the production of toxins A and B, and, in hypervirulent strains, binary toxin (CDT). C. difficile is a relevant enteric pathogen in various animal species and humans. Moreover, it is considered the leading cause of antibiotic-associated diarrhea and nosocomial infections in humans. Its growing significance as a zoonotic pathogen poses a public health threat due to increasing antibiotic resistance and the emergence of hypervirulent strains associated with severe infections, high recurrence rates, and mortality. In Spain, the annual cost of C. difficile infections in humans is estimated at approximately €41.8 million. The epidemiological shifts of this disease underscore the need to investigate the relationship between strains isolated from humans and animals and to characterize animal-origin strains. Despite the importance of C. difficile infections in animals, no official guidelines have been published regarding the detection and control of this pathogen. Therefore, this study aimed to further understand the pathogenicity of C. difficile by characterizing strains from different ribotypes and toxinotypes...
Clostridioides difficile (C. difficile) is a Gram-positive, strictly anaerobic, spore-forming bacterium. Its pathogenic action is attributed to the production of toxins A and B, and, in hypervirulent strains, binary toxin (CDT). C. difficile is a relevant enteric pathogen in various animal species and humans. Moreover, it is considered the leading cause of antibiotic-associated diarrhea and nosocomial infections in humans. Its growing significance as a zoonotic pathogen poses a public health threat due to increasing antibiotic resistance and the emergence of hypervirulent strains associated with severe infections, high recurrence rates, and mortality. In Spain, the annual cost of C. difficile infections in humans is estimated at approximately €41.8 million. The epidemiological shifts of this disease underscore the need to investigate the relationship between strains isolated from humans and animals and to characterize animal-origin strains. Despite the importance of C. difficile infections in animals, no official guidelines have been published regarding the detection and control of this pathogen. Therefore, this study aimed to further understand the pathogenicity of C. difficile by characterizing strains from different ribotypes and toxinotypes...
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Tesis inédita de la Universidad Complutense de Madrid, Facultad de Veterinaria, leída el 26-09-2025













