A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factors
Poultry are the main source of human infection by Salmonella. As infected poultry are asymptomatic, identifying infected poultry farms is difficult, thus controlling animal infections is of primary importance. As cell tropism is known to govern disease, our aim was therefore to identify infected hos...
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| Format: | Article |
| Language: | English |
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The Royal Society
2021-11-01
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| Series: | Open Biology |
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| Online Access: | https://royalsocietypublishing.org/doi/10.1098/rsob.210117 |
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| author | S. M. Roche S. Holbert Y. Le Vern C. Rossignol A. Rossignol P. Velge I. Virlogeux-Payant |
| author_facet | S. M. Roche S. Holbert Y. Le Vern C. Rossignol A. Rossignol P. Velge I. Virlogeux-Payant |
| author_sort | S. M. Roche |
| collection | DOAJ |
| description | Poultry are the main source of human infection by Salmonella. As infected poultry are asymptomatic, identifying infected poultry farms is difficult, thus controlling animal infections is of primary importance. As cell tropism is known to govern disease, our aim was therefore to identify infected host–cell types in the organs of chicks known to be involved in Salmonella infection and investigate the role of the three known invasion factors in this process (T3SS-1, Rck and PagN). Chicks were inoculated with wild-type or isogenic fluorescent Salmonella Typhimurium mutants via the intracoelomic route. Our results show that liver, spleen, gall bladder and aortic vessels could be foci of infection, and that phagocytic and non-phagocytic cells, including immune, epithelial and endothelial cells, are invaded in vivo in each organ. Moreover, a mutant defective for the T3SS-1, Rck and PagN remained able to colonize organs like the wild-type strain and invaded non-phagocytic cells in each organ studied. As the infection of the gall bladder had not previously been described in chicks, invasion of gall bladder cells was confirmed by immunohistochemistry and infection was shown to last several weeks after inoculation. Altogether, for the first time these findings provide insights into cell tropism of Salmonella in relevant organs involved in Salmonella infection in chicks and also demonstrate that the known invasion factors are not required for entry into these cell types. |
| first_indexed | 2024-03-13T09:57:57Z |
| format | Article |
| id | doaj.art-b813dbe696b0465cac609f3aaeb5f015 |
| institution | Directory Open Access Journal |
| issn | 2046-2441 |
| language | English |
| last_indexed | 2024-03-13T09:57:57Z |
| publishDate | 2021-11-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Open Biology |
| spelling | doaj.art-b813dbe696b0465cac609f3aaeb5f0152023-05-23T13:48:34ZengThe Royal SocietyOpen Biology2046-24412021-11-01111110.1098/rsob.210117A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factorsS. M. Roche0S. Holbert1Y. Le Vern2C. Rossignol3A. Rossignol4P. Velge5I. Virlogeux-Payant6INRAE, Université de Tours, ISP, 37380 Nouzilly, FranceINRAE, Université de Tours, ISP, 37380 Nouzilly, FranceINRAE, Université de Tours, ISP, 37380 Nouzilly, FranceINRAE, Université de Tours, ISP, 37380 Nouzilly, FranceINRAE, Université de Tours, ISP, 37380 Nouzilly, FranceINRAE, Université de Tours, ISP, 37380 Nouzilly, FranceINRAE, Université de Tours, ISP, 37380 Nouzilly, FrancePoultry are the main source of human infection by Salmonella. As infected poultry are asymptomatic, identifying infected poultry farms is difficult, thus controlling animal infections is of primary importance. As cell tropism is known to govern disease, our aim was therefore to identify infected host–cell types in the organs of chicks known to be involved in Salmonella infection and investigate the role of the three known invasion factors in this process (T3SS-1, Rck and PagN). Chicks were inoculated with wild-type or isogenic fluorescent Salmonella Typhimurium mutants via the intracoelomic route. Our results show that liver, spleen, gall bladder and aortic vessels could be foci of infection, and that phagocytic and non-phagocytic cells, including immune, epithelial and endothelial cells, are invaded in vivo in each organ. Moreover, a mutant defective for the T3SS-1, Rck and PagN remained able to colonize organs like the wild-type strain and invaded non-phagocytic cells in each organ studied. As the infection of the gall bladder had not previously been described in chicks, invasion of gall bladder cells was confirmed by immunohistochemistry and infection was shown to last several weeks after inoculation. Altogether, for the first time these findings provide insights into cell tropism of Salmonella in relevant organs involved in Salmonella infection in chicks and also demonstrate that the known invasion factors are not required for entry into these cell types.https://royalsocietypublishing.org/doi/10.1098/rsob.210117Salmonellapoultryhost–pathogen interactioninvasiongall bladder |
| spellingShingle | S. M. Roche S. Holbert Y. Le Vern C. Rossignol A. Rossignol P. Velge I. Virlogeux-Payant A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factors Open Biology Salmonella poultry host–pathogen interaction invasion gall bladder |
| title | A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factors |
| title_full | A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factors |
| title_fullStr | A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factors |
| title_full_unstemmed | A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factors |
| title_short | A large panel of chicken cells are invaded in vivo by Salmonella Typhimurium even when depleted of all known invasion factors |
| title_sort | large panel of chicken cells are invaded in vivo by salmonella typhimurium even when depleted of all known invasion factors |
| topic | Salmonella poultry host–pathogen interaction invasion gall bladder |
| url | https://royalsocietypublishing.org/doi/10.1098/rsob.210117 |
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