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Biomédica
Print version ISSN 0120-4157
Abstract
FANDINO, Luz Clemencia and VERJAN-GARCIA, Noel. A common Salmonella Enteritidis sequence type from poultry and human gastroenteritis in Ibagué, Colombia. Biomédica [online]. 2019, vol.39, suppl.1, pp.50-62. ISSN 0120-4157. https://doi.org/10.7705/biomedica.v39i1.4155.
Introduction:
Salmonella Enteritidis is a major cause of human salmonellosis in the world, with contaminated eggs and raw chicken meat as the main routes of infection. The main Salmonella spp. serovars circulating in laying hen farms, the surface of eggs, and in raw chicken carcasses have been identified in Ibagué, Colombia. However, it is unknown whether those serovars are responsible for human gastroenteritis.
Objective:
To evaluate the genetic relationship between gastroenteritis and Salmonella Enteritidis isolates from poultry and humans using multilocus sequence typing (MLST).
Materials and methods:
Salmonella spp. was isolated from clinical cases of gastroenteritis (n=110). Antibiotic susceptibility tests, followed by serotyping and MLST were conducted and S. Enteritidis was compared to those from laying hen farms and marketed eggs.
Results:
Ten isolates of Salmonella spp. were obtained from the stools of people with gastroenteritis. The prevalence of Salmonella spp. in human stools was 9.09%, and S. Enteritidis (n=4), S. Typhymurium (n=2), S. Newport (n=1), S. Uganda (n=1), S. Grupensis (n=1), and S. Braenderup (n=1) were the main serotypes. MLST indicated that a common S. Enteritidis sequence type (ST11) was present in all three sources and showed the same antibiotic resistance pattern.
Conclusion:
Salmonella Enteritidis ST11 constitutes a link between consumption and manipulation of contaminated eggs and human gastroenteritis in Ibagué. Additional studies would be required to establish if other Salmonella serovars isolated from raw chicken meat are also associated with human gastroenteritis.
Keywords : Salmonella; poultry; multilocus sequence typing; serogroup; gastroenteritis.