Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in Colombia
Background and Aim: Salmonella spp. is frequently found in the digestive tract of birds and reptiles and transmitted to humans through food. Salmonellosis is a public health problem because of pathogenicity variability in strains for virulence factors. This study aimed to identify the virulence gene...
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| Format: | Article |
| Language: | English |
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Veterinary World
2023-10-01
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| Series: | Veterinary World |
| Subjects: | |
| Online Access: | https://www.veterinaryworld.org/Vol.16/October-2023/11.pdf |
| _version_ | 1797659999124586496 |
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| author | Julieth Michel Petano-Duque Valentina Rueda-García Iang Schroniltgen Rondón-Barragán |
| author_facet | Julieth Michel Petano-Duque Valentina Rueda-García Iang Schroniltgen Rondón-Barragán |
| author_sort | Julieth Michel Petano-Duque |
| collection | DOAJ |
| description | Background and Aim: Salmonella spp. is frequently found in the digestive tract of birds and reptiles and transmitted to humans through food. Salmonellosis is a public health problem because of pathogenicity variability in strains for virulence factors. This study aimed to identify the virulence genes in Salmonella isolates from humans, crocodiles, broiler cloacas, and broiler carcasses from two departments of Colombia.
Materials and Methods: This study was conducted on 31 Salmonella enterica strains from humans with gastroenteritis (seven), crocodiles (seven), broiler cloacas (six), and broiler carcasses (12) from Tolima and Santander departments of Colombia, belonging to 21 serotypes. All samples were tested for Salmonella spp. using culture method on selective and non-selective mediums. Extraction of genomic DNA was performed from fresh colonies, DNA quality was verified by spectrophotometry and confirmed by amplification of InvA gene using conventional polymerase chain reaction (PCR). bapA, fimA, icmF, IroB, marT, mgtC, nlpI, oafA, pagN, siiD, spvC, spvR, spvB, Stn, and vexA genes were amplified by PCR.
Results: The most prevalent gene was bapA (100%), followed by marT (96.77%), mgtC (93.55%), and fimA (83.87%). Likewise, IroB (70.97%), Stn (67.74%), spvR (61.29%), pagN (54.84%), icmF (54.8%), and SiiD (45.16%) were positive for more than 50% of the strains. Furthermore, none of the isolates tested positive for the vexA gene. Salmonella isolates presented 26 virulence profiles.
Conclusion: This study reported 14 virulence genes in Salmonella spp. isolates from humans with gastroenteritis, crocodiles, and broiler cloacas and carcasses. The distribution of virulence genes differed among sources. This study could help in decision-making by health and sanitary authorities. |
| first_indexed | 2024-03-11T18:24:21Z |
| format | Article |
| id | doaj.art-be40e7ba6f244b2a9f25581e6f9afa7c |
| institution | Directory Open Access Journal |
| issn | 0972-8988 2231-0916 |
| language | English |
| last_indexed | 2024-03-11T18:24:21Z |
| publishDate | 2023-10-01 |
| publisher | Veterinary World |
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| spelling | doaj.art-be40e7ba6f244b2a9f25581e6f9afa7c2023-10-14T12:34:20ZengVeterinary WorldVeterinary World0972-89882231-09162023-10-0116102096210310.14202/vetworld.2023.2096-2103Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in ColombiaJulieth Michel Petano-Duque0https://orcid.org/0000-0002-7473-3472Valentina Rueda-García1https://orcid.org/0000-0001-6714-6045Iang Schroniltgen Rondón-Barragán2https://orcid.org/0000-0001-6980-892XPoultry Research Group, Faculty of Veterinary Medicine and Zootechnics, University of Tolima, Santa Helena Highs, Ibagué, Tolima, Colombia; Research Group in Immunobiology and Pathogenesis, Faculty of Veterinary Medicine and Zootechnics, University of Tolima, Santa Helena Highs, Ibagué, Tolima, Colombia.Research Group in Immunobiology and Pathogenesis, Faculty of Veterinary Medicine and Zootechnics, University of Tolima, Santa Helena Highs, Ibagué, Tolima, Colombia.Poultry Research Group, Faculty of Veterinary Medicine and Zootechnics, University of Tolima, Santa Helena Highs, Ibagué, Tolima, Colombia; Research Group in Immunobiology and Pathogenesis, Faculty of Veterinary Medicine and Zootechnics, University of Tolima, Santa Helena Highs, Ibagué, Tolima, Colombia.Background and Aim: Salmonella spp. is frequently found in the digestive tract of birds and reptiles and transmitted to humans through food. Salmonellosis is a public health problem because of pathogenicity variability in strains for virulence factors. This study aimed to identify the virulence genes in Salmonella isolates from humans, crocodiles, broiler cloacas, and broiler carcasses from two departments of Colombia. Materials and Methods: This study was conducted on 31 Salmonella enterica strains from humans with gastroenteritis (seven), crocodiles (seven), broiler cloacas (six), and broiler carcasses (12) from Tolima and Santander departments of Colombia, belonging to 21 serotypes. All samples were tested for Salmonella spp. using culture method on selective and non-selective mediums. Extraction of genomic DNA was performed from fresh colonies, DNA quality was verified by spectrophotometry and confirmed by amplification of InvA gene using conventional polymerase chain reaction (PCR). bapA, fimA, icmF, IroB, marT, mgtC, nlpI, oafA, pagN, siiD, spvC, spvR, spvB, Stn, and vexA genes were amplified by PCR. Results: The most prevalent gene was bapA (100%), followed by marT (96.77%), mgtC (93.55%), and fimA (83.87%). Likewise, IroB (70.97%), Stn (67.74%), spvR (61.29%), pagN (54.84%), icmF (54.8%), and SiiD (45.16%) were positive for more than 50% of the strains. Furthermore, none of the isolates tested positive for the vexA gene. Salmonella isolates presented 26 virulence profiles. Conclusion: This study reported 14 virulence genes in Salmonella spp. isolates from humans with gastroenteritis, crocodiles, and broiler cloacas and carcasses. The distribution of virulence genes differed among sources. This study could help in decision-making by health and sanitary authorities.https://www.veterinaryworld.org/Vol.16/October-2023/11.pdfbroilers cloacacarcassescrocodilesgastroenteritis humanpolymerase chain reactionvirulence genes |
| spellingShingle | Julieth Michel Petano-Duque Valentina Rueda-García Iang Schroniltgen Rondón-Barragán Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in Colombia Veterinary World broilers cloaca carcasses crocodiles gastroenteritis human polymerase chain reaction virulence genes |
| title | Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in Colombia |
| title_full | Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in Colombia |
| title_fullStr | Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in Colombia |
| title_full_unstemmed | Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in Colombia |
| title_short | Virulence genes identification in Salmonella enterica isolates from humans, crocodiles, and poultry farms from two regions in Colombia |
| title_sort | virulence genes identification in salmonella enterica isolates from humans crocodiles and poultry farms from two regions in colombia |
| topic | broilers cloaca carcasses crocodiles gastroenteritis human polymerase chain reaction virulence genes |
| url | https://www.veterinaryworld.org/Vol.16/October-2023/11.pdf |
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