Characterization of two typhoid fever outbreaks in Apartadó, Antioquia, 2005

Nora María Cardona-Castro, Miryan Margot Sánchez-Jiménez, Luz Yaned Usuga-Silva, Margarita Arboleda-Naranjo, Eliana Garzón, Aminta Vélez, Magdalena Wiesner, Nélida Muñoz, Clara Inés Agudelo, .

Keywords: Disease outbreaks, typhoid fever/epidemiology, Salmonella Typhi, Salmonella infections, bacterial typing techniques, serotyping

Abstract

Introduction. The characterization of typhoid fever outbreaks is important because it is necessary to find the source of the infection and development control measures.
Objective. A typhoid fever outbreak is described from Apartadó and the Salmonella Typhi isolates characterized by phenotypic and genotypic methods.
Materials and methods. From 44 patients, 15 blood cultures and 7 stools cultures were recovered. Phenotypic identification of isolates was done by biochemical and serological tests, and antibiotic susceptibility was tested. Genes hilA, invA and the IS200 marker were evaluated by polymerase chain reaction; pulsed field gel electrophoresis was used for the XbaI gene. Eight water samples were examined by polymerase chain reaction and culture methods in order to isolate Salmonella spp.
Results. Fifteen patients were confirmed for typhoid fever, 13 by blood cultures and two by stools cultures. All S. Typhi isolates were susceptible to the antimicrobials tested. The presence of hilA, invA and IS200 were confirmed by polymerase chain reaction in all isolates. The pulsed field gel electrophoresis method grouped 10 isolates in COINJPP.X01.0035 pattern, three in COINJPPX01.0002, one in COINJPP.X01.0012 and one in COINJPPX01.0037. Water isolates were negatives for Salmonella spp.
Conclusions. Pulsed field gel electrophoresis discriminated the isolates in two outbreaks. Initially the cases were described as only one outbreak, by epidemiological criteria and phenotypic test. Additionally two isolates with different clonal origin were discriminated, indicating that they were unrelated to the other cases. It was not possible to confirm the infection source from water samples.

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  • Nora María Cardona-Castro Instituto Colombiano de Medicina Tropical-CES, Sabaneta-Apartadó, Colombia
  • Miryan Margot Sánchez-Jiménez Instituto Colombiano de Medicina Tropical-CES, Sabaneta-Apartadó, Colombia
  • Luz Yaned Usuga-Silva Instituto Colombiano de Medicina Tropical-CES, Sabaneta-Apartadó, Colombia
  • Margarita Arboleda-Naranjo Instituto Colombiano de Medicina Tropical-CES, Sabaneta-Apartadó, Colombia
  • Eliana Garzón Facultad de Medicina, Instituto de Ciencias de la Salud-CES, Medellín, Colombia
  • Aminta Vélez Hospital Regional Antonio Roldán Betancur, Apartadó, Colombia
  • Magdalena Wiesner Grupo de Microbiología, Instituto Nacional de Salud, Bogotá, D. C., Colombia
  • Nélida Muñoz Grupo de Microbiología, Instituto Nacional de Salud, Bogotá, D. C., Colombia
  • Clara Inés Agudelo Grupo de Microbiología, Instituto Nacional de Salud, Bogotá, D. C., Colombia

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How to Cite
1.
Cardona-Castro NM, Sánchez-Jiménez MM, Usuga-Silva LY, Arboleda-Naranjo M, Garzón E, Vélez A, et al. Characterization of two typhoid fever outbreaks in Apartadó, Antioquia, 2005. biomedica [Internet]. 2007 Jun. 1 [cited 2024 May 18];27(2):236-43. Available from: https://revistabiomedica.org/index.php/biomedica/article/view/219

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