Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis.
Objective: The goal of this study is to describe the genome of Streptococcus agalactiae that was found in clinical mastitis in cattle in Bangladesh. This work will show how strong the bacteria are and how important they are for public health. Materials and Methods: Whole genome sequencing (WGS) was...
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Network for the Veterinarians of Bangladesh
2025-03-01
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| Series: | Journal of Advanced Veterinary and Animal Research |
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| Online Access: | http://www.ejmanager.com/fulltextpdf.php?mno=214213 |
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| author | Jayedul Hassan Abdus Sattar Bag Susmita Karmakar Kishor Sosmith Utsho Wohab Ali Ajran Kabir Tanvir Rahman. |
| author_facet | Jayedul Hassan Abdus Sattar Bag Susmita Karmakar Kishor Sosmith Utsho Wohab Ali Ajran Kabir Tanvir Rahman. |
| author_sort | Jayedul Hassan |
| collection | DOAJ |
| description | Objective: The goal of this study is to describe the genome of Streptococcus agalactiae that was found in clinical mastitis in cattle in Bangladesh. This work will show how strong the bacteria are and how important they are for public health.
Materials and Methods: Whole genome sequencing (WGS) was performed using the Illumina MiSeq platform, followed by comprehensive analysis with various bioinformatic tools to identify key genomic features.
Results: WGS revealed that the isolates are closely related, belonging to sequence type ST4, a rare type previously identified in both human and animal hosts. The isolates possess 44 viru-lence-related genes linked to adherence, capsule biogenesis, enzyme production, immunoreac-tive antigens, protease, and cytolysin production. They also carry two pilus islands (PIs), PI-1 and PI-2b, which are often associated with invasive diseases. PI-2b proteins are key targets for vaccine development against Group B Streptococcus (GBS). The isolates belong to serotype Ia and carry the gbs2018-2 variant, indicating their adaptability to a wide range of hosts, including humans and animals. These virulence factors are critical for understanding S. agalactiae's pathogenicity and developing vaccines against its infections. Additionally, the isolates harbor antimicrobial resistance genes conferring resistance to glycopeptides (vanT, vanY), macrolides (mreA), peptides (mprF), penicillins and β-lactams (pbp), and aminoglycosides. Source tracking via the BacWGSTdb website identified these isolates as closely related to human pathogens, indicating their zoonotic potential.
Conclusion: These results suggest that S. agalactiae could be a zoonotic pathogen. This highlights the need for ongoing genomic surveillance to fully understand how it causes disease and come up with effective ways to control it. [J Adv Vet Anim Res 2025; 12(1.000): 80-89] |
| format | Article |
| id | doaj-art-5a19c2d7b43f4ea495d74e091cfcb2fc |
| institution | OA Journals |
| issn | 2311-7710 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Network for the Veterinarians of Bangladesh |
| record_format | Article |
| series | Journal of Advanced Veterinary and Animal Research |
| spelling | doaj-art-5a19c2d7b43f4ea495d74e091cfcb2fc2025-08-20T02:18:50ZengNetwork for the Veterinarians of BangladeshJournal of Advanced Veterinary and Animal Research2311-77102025-03-01121808910.5455/javar.2025.l874214213Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis.Jayedul Hassan0Abdus Sattar Bag1Susmita Karmakar2Kishor Sosmith Utsho3Wohab Ali4Ajran Kabir5Tanvir Rahman.6Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensingh, Bangladesh.Objective: The goal of this study is to describe the genome of Streptococcus agalactiae that was found in clinical mastitis in cattle in Bangladesh. This work will show how strong the bacteria are and how important they are for public health. Materials and Methods: Whole genome sequencing (WGS) was performed using the Illumina MiSeq platform, followed by comprehensive analysis with various bioinformatic tools to identify key genomic features. Results: WGS revealed that the isolates are closely related, belonging to sequence type ST4, a rare type previously identified in both human and animal hosts. The isolates possess 44 viru-lence-related genes linked to adherence, capsule biogenesis, enzyme production, immunoreac-tive antigens, protease, and cytolysin production. They also carry two pilus islands (PIs), PI-1 and PI-2b, which are often associated with invasive diseases. PI-2b proteins are key targets for vaccine development against Group B Streptococcus (GBS). The isolates belong to serotype Ia and carry the gbs2018-2 variant, indicating their adaptability to a wide range of hosts, including humans and animals. These virulence factors are critical for understanding S. agalactiae's pathogenicity and developing vaccines against its infections. Additionally, the isolates harbor antimicrobial resistance genes conferring resistance to glycopeptides (vanT, vanY), macrolides (mreA), peptides (mprF), penicillins and β-lactams (pbp), and aminoglycosides. Source tracking via the BacWGSTdb website identified these isolates as closely related to human pathogens, indicating their zoonotic potential. Conclusion: These results suggest that S. agalactiae could be a zoonotic pathogen. This highlights the need for ongoing genomic surveillance to fully understand how it causes disease and come up with effective ways to control it. [J Adv Vet Anim Res 2025; 12(1.000): 80-89]http://www.ejmanager.com/fulltextpdf.php?mno=214213s. agalactiae; clinical mastitis; genomic features; bangladesh |
| spellingShingle | Jayedul Hassan Abdus Sattar Bag Susmita Karmakar Kishor Sosmith Utsho Wohab Ali Ajran Kabir Tanvir Rahman. Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis. Journal of Advanced Veterinary and Animal Research s. agalactiae; clinical mastitis; genomic features; bangladesh |
| title | Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis. |
| title_full | Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis. |
| title_fullStr | Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis. |
| title_full_unstemmed | Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis. |
| title_short | Genomic features and pathogenic potential of Streptococcus agalactiae isolated from bovine clinical mastitis. |
| title_sort | genomic features and pathogenic potential of streptococcus agalactiae isolated from bovine clinical mastitis |
| topic | s. agalactiae; clinical mastitis; genomic features; bangladesh |
| url | http://www.ejmanager.com/fulltextpdf.php?mno=214213 |
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