ArticlePloS one2018
Streptococcus agalactiae is not always an obligate intramammary pathogen: Molecular epidemiology of GBS from milk, feces and environment in Colombian dairy herds.
Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 2 of them syntheses that pooled it.
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Who cites it
20 citing papers in PubMed, 2 syntheses or guidelines pooled it, 31 citations in OpenAlex.
- Veterinary macrolides againstFrontiers in veterinary science · 2026Pooled it
- One hypervirulent clone, sequence type 283, accounts for a large proportion of invasive Streptococcus agalactiae isolated from humans and diseased tilapia in Southeast Asia.PLoS neglected tropical diseases · 2019Pooled it
- Comparative genomic and phenotypic analysis of human- and dairy cattle -derived Streptococcus agalactiae reveals potential cross-species infection capability.BMC microbiology · 2026Article
- Incidence of Streptococcus spp. and whole genome sequencing of Streptococcus agalactiae isolated from cow's milk samples in Brazil.Veterinary research communications · 2026Article
- Home is where the host is: evolutionary history of geographic spread, host switching and adaptive genomic signatures in two generalist group BMicrobial genomics · 2026Article
- Zoonotic Approach toInternational journal of microbiology · 2026Article
- Molecular Detection of Virulence Genes and Multi-drug Resistance Patterns inArchives of Razi Institute · 2025Article
- Phenotypic and genotypic characterization of ST103 serotype Ia Streptococcus agalactiae isolated from bovine mastitis in China.BMC microbiology · 2025Article
- Genetic diversity of Streptococcus agalactiae from dairy cattle with mastitis in Argentina.BMC veterinary research · 2025Article
- Group B Streptococcus Sequence Type 103 as Human and Bovine Pathogen, Brazil.Emerging infectious diseases · 2024Article
- Molecular and phenotypic identification of bacterial species isolated from cows with mastitis from three regions of Poland.BMC veterinary research · 2024Article
- Interspecies Interactions within the Host: the Social Network of Group BInfection and immunity · 2023Review
- Relationship between Biofilm Production and High Somatic Cell Count inPathogens (Basel, Switzerland) · 2023Article
- Virulence Factor Genes and Cytotoxicity ofMicrobiology spectrum · 2022Article
- Circulation ofApplied and environmental microbiology · 2022Article
- Article
- Molecular epidemiology, drug resistance, and virulence gene analysis ofFrontiers in cellular and infection microbiology · 2022Article
- Investigation of extramammary sources of Group B Streptococcus reveals its unusual ecology and epidemiology in camels.PloS one · 2021Article
- Multidrug Resistance and Molecular Characterization ofFrontiers in cellular and infection microbiology · 2021Article
- Potential group B Streptococcus interspecies transmission between cattle and people in Colombian dairy farms.Scientific reports · 2019Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
For many years Streptococcus agalactiae has been considered an obligate intramammary and strictly contagious pathogen in dairy cattle. However, recent reports of S. agalactiae isolation from extramammary sources have contradicted that premise. To gain further insight into the epidemiology of S. agalactiae infection in cattle, we examined its distribution and heterogeneity of strains in bovine milk, bovine feces, and the environment in Colombian dairy farms. First, a longitudinal study was conducted at herd level in 152 dairy herds. Bulk tank milk samples from each herd where collected twice a month for six months. A follow-up study with a cross sectional design at the cow level was conducted in a subset of 25 farms positive for S. agalactiae. Cow-level milk samples from 1712 lactatting cows and 1545 rectal samples were collected, as well as 120 environmental samples. Samples were used for S. agalactiae detection and genotyping using Multi Locus Sequence Typing. Results showed sporadic rather than repeated isolation of S. agalactiae from bulk tank milk in 40% of the positive herds, challenging the idea that S. agalactiae is a highly contagious pathogen causing chronic infections. S. agalactiae was isolated from rectal or environmental samples in 32% and 12% of cross-sectional study farms, respectively, demonstrating that the bacteria can survive in extramammary sources and that S. agalactiae is not an obligate intramammary pathogen. The same strain was isolated from rectal and bulk tank milk samples in eight farms, suggesting that fecal shedding is frequent, and contributes to the presence of S. agalactiae in bulk tank. High within-herd heterogeneity of strains was found, which is distinct from the situation in developed dairy industries. These new epidemiological findings should be considered to adjust surveillance and control recommendations for S. agalactiae.
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