Results: 1341

De la escrófula a la linfoadenitis micobacteriana

Rev. chil. infectol; 34 (6), 2017
Resumen En el siglo XIX se pensaba que la tuberculosis y la tumefacción ganglionar cervical llamada escrófula afectaban a individuos predispuestos por una "constitución diatésica" heredada. En 1882 Robert Koch demostró que lesiones tuberculosas y escrofulosas humanas eran causadas por el bacilo Myco...

Estudio Transversal: Conocimientos, Actitudes y Prácticas sobre el Chikungunya en la Población de la Parroquia Bartolomé Ruiz del Cantón Esmeraldas – Ecuador, 2015

INTRODUCCIÓN: En el año 2016 se reportaron 34261 casos de Chikungunya en Ecuador, La provincia de Esmeraldas ocupó el primer lugar con la mayor cantidad de casos. La enfermedad superó la capacidad de respuesta de los servicios sanitarios de esta provincia. Las condiciones socio-económicas y cultural...

Informe especial: Actualización epidemiológica de difteria

La difteria es una enfermedad infecciosa grave, con potencial epidémico, para la que existe una vacuna eficaz. Es una infección bacteriana aguda causada por la liberación de una exotoxina específica, producida por el bacilo gram positivo, Corynebacterium diphtheriae. Sólo las cepas toxigénicas caus...

Construction of Mycobacterium tuberculosis cdd knockout and evaluation of invasion and growth in macrophages

Mem. Inst. Oswaldo Cruz; 112 (11), 2017
Cytidine deaminase (MtCDA), encoded by cdd gene (Rv3315c), is the only enzyme identified in nucleotide biosynthesis pathway of Mycobacterium tuberculosis that is able to recycle cytidine and deoxycytidine. An M. tuberculosis knockout strain for cdd gene was obtained by allelic replacement. Evaluation of ...

Evaluation of the biofilm formation capacity of Pasteurella multocida strains isolated from cases of fowl cholera and swine lungs and its relationship with pathogenicity

Pesqui. vet. bras; 37 (10), 2017
Pasteurella multocida is a Gram-negative bacillus that causes economic losses due to the development of respiratory diseases in several animal species. Among the mechanisms of virulence, the formation of biofilms is an important factor for bacterial survival in hostile environments. Studies of biofilm fo...

Next-generation sequencing virulome analysis of a Yersinia enterocolitica subsp. palearctica bioserotype 4/O: 3 ST18 isolated from human blood in Brazil

Braz. j. infect. dis; 21 (5), 2017
Abstract Yersinia enterocolitica is a widespread Gram-negative bacterium that causes gastrointestinal disease and other clinical manifestations in humans. Potentially pathogenic Y. enterocolitica has been isolated in Brazil, from human, environmental, food, and animal sources. Herein we report a genome s...

A comparative survey between non-systemic Salmonella spp. (paratyphoid group) and systemic Salmonella Pullorum and S. Gallinarum with a focus on virulence genes

Pesqui. vet. bras; 37 (10), 2017
A comparative survey between non-systemic (paratyphoid Salmonellae) and systemic (S. Pullorum and S. Gallinarum) Salmonella strains was performed to produce a virulence gene profile for differentiation among the groups. The following virulence genes were evaluated: invA, spvC, sefC, pefA, fimY, sopB, sop...

Polyomavirus en hospederos inmunocomprometidos: situación en Sudamérica

Rev. chil. infectol; 34 (5), 2017
Resumen A 46 años de la identificación de los primeros polyomavirus en humanos (PyV), la preocupación por encontrar nuevos tipos relacionados a patologías de distintos órganos en pacientes inmunosuprimidos persiste. Hasta el momento de esta revisión, 15 PyV han sido descritos, muchos de ellos sin e...

Sympatry influence in the interaction of Trypanosoma cruzi with triatomine

Abstract INTRODUCTION: Trypanosoma cruzi, the etiologic agent of Chagas disease, is widely distributed in nature, circulating between triatomine bugs and sylvatic mammals, and has large genetic diversity. Both the vector species and the genetic lineages of T. cruzi present a varied geographical distribu...

Selection of Bacillus thuringiensis strains toxic to cotton boll weevil (Anthonomus grandis, Coleoptera: Curculionidae) larvae

Rev. argent. microbiol; 49 (3), 2017
Preliminary bioassays with whole cultures (WC) of 124 Bacillus thuringiensis strains were performed with neonate larvae of Anthonomus grandis, a major cotton pest in Argentina and other regions of the Americas. Three exotic and four native strains were selected for causing more than 50% mortality. All of...