ZFIN ID: ZDB-PUB-170413-5
Salmonella Typhimurium induces cloacitis-like symptoms in zebrafish larvae
Varas, M., Ortíz-Severín, J., Marcoleta, A.E., Díaz-Pascual, F., Allende, M.L., Santiviago, C.A., Chávez, F.P.
Date: 2017
Source: Microbial pathogenesis   107: 317-320 (Journal)
Registered Authors: Allende, Miguel L.
Keywords: Cloacitis, Danio rerio, Deformed cloacal region, Immune response, Live-cell imaging, Salmonella infection
MeSH Terms:
  • Animals
  • Bacterial Proteins
  • Disease Models, Animal
  • Epithelial Cells/microbiology
  • Epithelial Cells/pathology
  • Host-Pathogen Interactions/immunology
  • Immersion
  • Immunity, Innate
  • Intestinal Mucosa/microbiology
  • Intestinal Mucosa/pathology
  • Larva/microbiology*
  • Neutrophils/immunology
  • Salmonella Infections, Animal/immunology
  • Salmonella Infections, Animal/microbiology*
  • Salmonella typhimurium/pathogenicity*
  • Virulence Factors
  • Zebrafish/microbiology*
PubMed: 28400130 Full text @ Microb. Pathog.
Pathogenic Salmonella strains have a set of virulence factors allowing them to generate systemic infections and damage in a variety of hosts. Among these factors, bacterial proteins secreted by specialized systems are used to penetrate the host's intestinal mucosa, through the invasion and destruction of specialized epithelial M cells in the intestine. On the other hand, numerous studies have demonstrated that humans, as well as experimental animal hosts, respond to Salmonella infection by activating both innate and adaptive immune responses. Here, through live cell imaging of S. Typhimurium infection of zebrafish larvae, we showed that besides the intestinal colonization, a deformed cloacae region and a concomitant accumulation of S. Typhimurium cells was observed upon bacterial infection. The swelling led to a persistent inflammation of infected larvae, although the infection was non-lethal. The in vivo inflammation process was confirmed by the co-localization of GFP-tagged S. Typhimurium with mCherry-tagged neutrophils at 72 h post exposition. Our live-cell analyses suggest that Salmonella Typhimurium induce cloacitis-like symptoms in zebrafish larvae.