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Aziz G, Zaidi A, Sullivan DJO'. Insights from metagenome-assembled genomes on the genetic stability and safety of over-the-counter probiotic products. Curr Genet 2023; 69:213-234. [PMID: 37237157 DOI: 10.1007/s00294-023-01271-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 04/04/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023]
Abstract
The demand for and acceptance of probiotics is determined by their quality and safety. Illumina NGS sequencing and analytics were used to examine eight marketed probiotics. Up to the species level, sequenced DNA was taxonomically identified, and relative abundances were determined using Kaiju. The genomes were constructed using GTDB and validated through PATRICK and TYGS. A FastTree 2 phylogenetic tree was constructed using several type strain sequences from relevant species. Bacteriocin and ribosomally synthesized polypeptide (RiPP) genes were discovered, and a safety check was performed to test for toxins, antibiotic resistance, and genetic drift genes. Except for two products with unclaimed species, the labeling was taxonomically correct. In three product formulations, Lactobacillus acidophilus, Limosilactobacillus reuteri, Lacticaseibacillus paracasei, and Bifidobacterium animalis exhibited two to three genomic alterations, while Streptococcus equinus was found in one. TYGS and GDTB discovered E. faecium and L. paracasei in distinctly different ways. All the bacteria tested had the genetic repertoire to tolerate GIT transit, although some exhibited antibiotic resistance, and one strain had two virulence genes. Except for Bifidobacterium strains, the others revealed a variety of bacteriocins and ribosomally synthesized polypeptides (RiPP), 92% of which were unique and non-homologous to known ones. Plasmids and mobile genetic elements are present in strains of L. reuteri (NPLps01.et_L.r and NPLps02.uf_L.r), Lactobacillus delbrueckii (NPLps01.et_L.d), Streptococcus thermophilus (NPLps06.ab_S.t), and E. faecium (NPLps07.nf_E.f). Our findings support the use of metagenomics to build better and efficient production and post-production practices for probiotic quality and safety assessment.
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Affiliation(s)
- Ghazal Aziz
- National Probiotic Laboratory, National Institute for Biotechnology and Genetic Engineering College (NIBGE-C), Punjab, 38000, Faisalabad, Pakistan
- Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, 45650, Islamabad (ICT), Pakistan
- Department of Food Science and Nutrition, Center for Microbial and Plant Genomics, University of Minnesota, 1500 Gortner Ave, St. Paul, MN, 55108, USA
| | - Arsalan Zaidi
- National Probiotic Laboratory, National Institute for Biotechnology and Genetic Engineering College (NIBGE-C), Punjab, 38000, Faisalabad, Pakistan.
- Pakistan Institute of Engineering and Applied Sciences (PIEAS), Nilore, 45650, Islamabad (ICT), Pakistan.
| | - Daniel J O ' Sullivan
- Department of Food Science and Nutrition, Center for Microbial and Plant Genomics, University of Minnesota, 1500 Gortner Ave, St. Paul, MN, 55108, USA
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Zhao X, Zhang Y, He B, Han Y, Shen B, Zang Y, Wang H. Transcriptional control of carbohydrate catabolism by the CcpA protein in the ruminal bacterium Streptococcus bovis. Appl Environ Microbiol 2023; 89:e0047423. [PMID: 37823652 PMCID: PMC10617382 DOI: 10.1128/aem.00474-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 07/23/2023] [Indexed: 10/13/2023] Open
Abstract
As a potent, pleiotropic regulatory protein in Gram-positive bacteria, catabolite control protein A (CcpA) mediates the transcriptional control of carbohydrate metabolism in Streptococcus bovis, a lactate-producing bacterium that plays an essential role in rumen acidosis in dairy cows. Although the rumen uptake of carbohydrates is multi-substrate, the focus of S. bovis research thus far has been on the glucose. With the aid of gene deletion, whole-genome sequencing, and transcriptomics, we have unraveled the role of CcpA in carbohydrate metabolism, on the one hand, and acidosis, on the other, and we show that the S. bovis strain S1 encodes "Carbohydrate-Active Enzymes" and that ccpA deletion slows the organism's growth rate and modulates the organic acid fermentation pathways toward lower lactate, higher formate, and acetate in the maltose and cellobiose. Furthermore, this study revealed the different regulatory functions of the CcpA protein in rumen metabolism and acidosis.IMPORTANCEThis study is important as it illustrates the varying regulatory role of the Streptococcus bovis catabolite control protein A protein in carbohydrate metabolism and the onset of acidosis in dairy cattle.
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Affiliation(s)
- Xiujuan Zhao
- Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Ying Zhang
- Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Banglin He
- Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Yu Han
- Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Ben Shen
- Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Yu Zang
- Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
| | - Hongrong Wang
- Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou, China
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3
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Güley Z, Fallico V, Cabrera-Rubio R, Cotter PD, Beresford T. Identification of Streptococcus infantarius subsp. infantarius as the species primarily responsible for acid production in Izmir Brined Tulum Cheese from the Aegean Region of Türkiye. Food Res Int 2022; 160:111707. [DOI: 10.1016/j.foodres.2022.111707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 07/02/2022] [Accepted: 07/15/2022] [Indexed: 11/04/2022]
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de Sousa BL, Azevedo AC, Oliveira IMF, Bento CBP, Santana MF, Bazzolli DMS, Mantovani HC. PCR screening reveals abundance of bovicin-like bacteriocins among ruminal Streptococcus spp. isolated from beef and dairy cattle. J Appl Microbiol 2021; 131:1695-1709. [PMID: 33714234 DOI: 10.1111/jam.15069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 01/07/2021] [Accepted: 03/09/2021] [Indexed: 11/30/2022]
Abstract
AIMS To investigate the inhibitory activity and the distribution of biosynthetic genes encoding bovicin-like bacteriocins among ruminal Streptococcus isolated from beef and dairy cattle. METHODS AND RESULTS Most isolates were classified as Streptococcus equinus and Streptococcus lutetiensis based on 16S rRNA sequencing. The antimicrobial activity of 150 ruminal streptococci isolated from beef and dairy cattle were tested by deferred inhibition assays and their genetic diversity was characterized by BOX-PCR. The frequency of biosynthetic genes associated with the biosynthesis of bovicin-like bacteriocins (bovicin HC5 and bovicin 255) was investigated by PCR screening. Approximately 33% of the ruminal streptococci isolated from Nellore heifers showed inhibitory activity in vitro with the majority harbouring genes for bacteriocin biosynthesis. In contrast, streptococci from Holstein cows showed limited inhibitory activity and a lower frequency of bacteriocin biosynthetic genes. CONCLUSIONS Streptococcus from the rumen of beef and dairy cattle exhibit remarkable differences in inhibitory activity and distribution of genes associated with the biosynthesis of prototypical bovicins (bovicin HC5 and bovicin 255). SIGNIFICANCE AND IMPACT OF THE STUDY Our findings demonstrate that bovicin HC5 is distributed among ruminal streptococci from different breeds of cattle. The high degree of conservation of the bovicin HC5 structural gene among strains of ruminal streptococci suggests that random genetic drift is not a dominant force in the evolution of this bacteriocin.
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Affiliation(s)
- B L de Sousa
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Brazil.,Departamento de Química, Universidade Federal de Viçosa, Viçosa, Brazil
| | - A C Azevedo
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - I M F Oliveira
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - C B P Bento
- Departamento de Microbiologia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, Unaí, Brazil
| | - M F Santana
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - D M S Bazzolli
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Brazil
| | - H C Mantovani
- Departamento de Microbiologia, Universidade Federal de Viçosa, Viçosa, Brazil
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5
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Park SY, Lee M, Lim SR, Kwon H, Lee YS, Kim JH, Seo S. Diversity and Antimicrobial Resistance in the Streptococcus bovis/ Streptococcus equinus Complex (SBSEC) Isolated from Korean Domestic Ruminants. Microorganisms 2021; 9:98. [PMID: 33406675 PMCID: PMC7824528 DOI: 10.3390/microorganisms9010098&set/a 837648689+998116719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
S. bovis/S. equinus complex (SBSEC) includes lactic acid-producing bacteria considered as the causative agent associated with acute rumen lactic acidosis in intensive ruminants. Considering the limited information on the detailed characteristics and diversity of SBSEC in Korea and the emergence of antimicrobial resistance (AMR), we investigated the diversity of SBSEC from domestic ruminants and verified the presence of antimicrobial resistance genes (ARGs) against several antimicrobials with their phenotypic resistance. Among 51 SBSEC isolates collected, two SBSEC members (S. equinus and S. lutetiensis) were identified; sodA-based phylogenetic analyses and comparisons of overall genome relatedness revealed potential plasticity and diversity. The AMR rates of these SBSEC against erythromycin, clindamycin, and tetracycline were relatively lower than those of other SBSEC isolates of a clinical origin. An investigation of the ARGs against those antimicrobials indicated that tetracycline resistance of SBSECs generally correlated with the presence of tet(M)-possessing Tn916-like transposon. However, no correlation between the presence of ARGs and phenotypic resistance to erythromycin and clindamycin was observed. Although a limited number of animals and their SBSEC isolates were examined, this study provides insights into the potential intraspecies biodiversity of ruminant-origin SBSEC and the current status on antimicrobial resistance of the bacteria in the Korean livestock industry.
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Affiliation(s)
- Seon Young Park
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
- Division of Animal and Dairy Sciences, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea;
| | - Mingyung Lee
- Division of Animal and Dairy Sciences, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea;
| | - Se Ra Lim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
| | - Hyemin Kwon
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
| | - Ye Seul Lee
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
| | - Ji Hyung Kim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
- Correspondence: (J.H.K.); (S.S.); Tel.: +82-(42)-879-8272 (J.H.K.)
| | - Seongwon Seo
- Division of Animal and Dairy Sciences, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea;
- Correspondence: (J.H.K.); (S.S.); Tel.: +82-(42)-879-8272 (J.H.K.)
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Diversity and Antimicrobial Resistance in the Streptococcus bovis/Streptococcus equinus Complex (SBSEC) Isolated from Korean Domestic Ruminants. Microorganisms 2021. [DOI: 10.3390/microorganisms9010098
expr 822437316 + 998765163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
Abstract
S. bovis/S. equinus complex (SBSEC) includes lactic acid-producing bacteria considered as the causative agent associated with acute rumen lactic acidosis in intensive ruminants. Considering the limited information on the detailed characteristics and diversity of SBSEC in Korea and the emergence of antimicrobial resistance (AMR), we investigated the diversity of SBSEC from domestic ruminants and verified the presence of antimicrobial resistance genes (ARGs) against several antimicrobials with their phenotypic resistance. Among 51 SBSEC isolates collected, two SBSEC members (S. equinus and S. lutetiensis) were identified; sodA-based phylogenetic analyses and comparisons of overall genome relatedness revealed potential plasticity and diversity. The AMR rates of these SBSEC against erythromycin, clindamycin, and tetracycline were relatively lower than those of other SBSEC isolates of a clinical origin. An investigation of the ARGs against those antimicrobials indicated that tetracycline resistance of SBSECs generally correlated with the presence of tet(M)-possessing Tn916-like transposon. However, no correlation between the presence of ARGs and phenotypic resistance to erythromycin and clindamycin was observed. Although a limited number of animals and their SBSEC isolates were examined, this study provides insights into the potential intraspecies biodiversity of ruminant-origin SBSEC and the current status on antimicrobial resistance of the bacteria in the Korean livestock industry.
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7
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Park SY, Lee M, Lim SR, Kwon H, Lee YS, Kim JH, Seo S. Diversity and Antimicrobial Resistance in the Streptococcus bovis/ Streptococcus equinus Complex (SBSEC) Isolated from Korean Domestic Ruminants. Microorganisms 2021; 9:microorganisms9010098. [PMID: 33406675 PMCID: PMC7824528 DOI: 10.3390/microorganisms9010098] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/24/2020] [Accepted: 12/31/2020] [Indexed: 01/12/2023] Open
Abstract
S. bovis/S. equinus complex (SBSEC) includes lactic acid-producing bacteria considered as the causative agent associated with acute rumen lactic acidosis in intensive ruminants. Considering the limited information on the detailed characteristics and diversity of SBSEC in Korea and the emergence of antimicrobial resistance (AMR), we investigated the diversity of SBSEC from domestic ruminants and verified the presence of antimicrobial resistance genes (ARGs) against several antimicrobials with their phenotypic resistance. Among 51 SBSEC isolates collected, two SBSEC members (S. equinus and S. lutetiensis) were identified; sodA-based phylogenetic analyses and comparisons of overall genome relatedness revealed potential plasticity and diversity. The AMR rates of these SBSEC against erythromycin, clindamycin, and tetracycline were relatively lower than those of other SBSEC isolates of a clinical origin. An investigation of the ARGs against those antimicrobials indicated that tetracycline resistance of SBSECs generally correlated with the presence of tet(M)-possessing Tn916-like transposon. However, no correlation between the presence of ARGs and phenotypic resistance to erythromycin and clindamycin was observed. Although a limited number of animals and their SBSEC isolates were examined, this study provides insights into the potential intraspecies biodiversity of ruminant-origin SBSEC and the current status on antimicrobial resistance of the bacteria in the Korean livestock industry.
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Affiliation(s)
- Seon Young Park
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
- Division of Animal and Dairy Sciences, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea;
| | - Mingyung Lee
- Division of Animal and Dairy Sciences, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea;
| | - Se Ra Lim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
| | - Hyemin Kwon
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
| | - Ye Seul Lee
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
| | - Ji Hyung Kim
- Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; (S.Y.P.); (S.R.L.); (H.K.); (Y.S.L.)
- Correspondence: (J.H.K.); (S.S.); Tel.: +82-(42)-879-8272 (J.H.K.)
| | - Seongwon Seo
- Division of Animal and Dairy Sciences, College of Agriculture and Life Science, Chungnam National University, Daejeon 34134, Korea;
- Correspondence: (J.H.K.); (S.S.); Tel.: +82-(42)-879-8272 (J.H.K.)
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Traditional milk transformation schemes in Côte d'Ivoire and their impact on the prevalence of Streptococcus bovis complex bacteria in dairy products. PLoS One 2020; 15:e0233132. [PMID: 32413097 PMCID: PMC7228116 DOI: 10.1371/journal.pone.0233132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 04/28/2020] [Indexed: 02/07/2023] Open
Abstract
The Streptococcus bovis/Streptococcus equinus complex (SBSEC) and possibly Streptococcus infantarius subsp. infantarius (Sii) are associated with human and animal diseases. Sii predominate in spontaneously fermented milk products with unknown public health effects. Sii/SBSEC prevalence data from West Africa in correlation with milk transformation practices are limited. Northern Côte d'Ivoire served as study area due to its importance in milk production and consumption and to link a wider Sudano-Sahelian pastoral zone of cross-border trade. We aimed to describe the cow milk value chain and determine Sii/SBSEC prevalence with a cross-sectional study. Dairy production practices were described as non-compliant with basic hygiene standards. The system is influenced by secular sociocultural practices and environmental conditions affecting product properties. Phenotypic and molecular analyses identified SBSEC in 27/43 (62.8%) fermented and 26/67 (38.8%) unfermented milk samples. Stratified by collection stage, fermented milk at producer and vendor levels featured highest SBSEC prevalence of 71.4% and 63.6%, respectively. Sii with 62.8% and 38.8% as well as Streptococcus gallolyticus subsp. macedonicus with 7.0% and 7.5% were the predominant SBSEC species identified among fermented and unfermented milk samples, respectively. The population structure of Sii/SBSEC isolates seems to reflect evolving novel dairy-adapted, non-adapted and potentially pathogenic lineages. Northern Côte d'Ivoire was confirmed as area with high Sii presence in dairy products. The observed production practices and the high diversity of Sii/SBSEC supports in-depth investigations on Sii ecology niche, product safety and related technology in the dairy value chain potentially affecting large population groups across sub-Saharan Africa.
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Oehmcke-Hecht S, Mandl V, Naatz LT, Dühring L, Köhler J, Kreikemeyer B, Maletzki C. Streptococcus gallolyticus abrogates anti-carcinogenic properties of tannic acid on low-passage colorectal carcinomas. Sci Rep 2020; 10:4714. [PMID: 32170212 PMCID: PMC7070001 DOI: 10.1038/s41598-020-61458-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 02/16/2020] [Indexed: 12/16/2022] Open
Abstract
The tannase-producing Gram-positive bacterial species Streptococcus gallolyticus subsp. gallolyticus (Sgg) is an opportunistic pathogen of the human gut and strongly associated with colorectal cancer (CRC). A unique feature of Sgg is its ability to degrade tannic acids (TA). TA constitute an important part of the human diet with known anti-tumorigenic properties. Here, we examined whether Sgg is able to protect tumor cells from the toxic effect of TA and thus drive tumorigenesis indirectly. Human CRC cell lines (n = 8) were treated with increasing concentrations of TA. We confirmed the cytotoxic activity of TA in a dose-dependent manner. In virtually all cell lines, viability decreased significantly (>60% inhibition). Moreover, pyrogallol, the degradation product of TA, had no effect on the tested cell lines. This suggests a specific effect of TA. Cytotoxicity was due to necrosis and induction of senescence in residual cells. Finally, when TA was degraded by Sgg, the cytotoxic effect could be abolished. Tumor cells even responded with boosted cell proliferation, highlighting the impact of Sgg on CRC progression. We here provide another piece of evidence for the active interplay between Sgg and cancer preventive components. These data will help to move forward in designing concepts for therapeutic and eventually also prophylactic approaches to combat gastrointestinal malignancies.
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Affiliation(s)
- Sonja Oehmcke-Hecht
- Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center, Rostock, Germany.
| | - Vanessa Mandl
- Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center, Rostock, Germany.,Department of Internal Medicine, Medical Clinic III - Hematology, Oncology, Palliative Care, Rostock University Medical Center, Rostock, Germany
| | - Lukas Tim Naatz
- Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center, Rostock, Germany.,Department of Internal Medicine, Medical Clinic III - Hematology, Oncology, Palliative Care, Rostock University Medical Center, Rostock, Germany
| | - Lara Dühring
- Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center, Rostock, Germany.,Department of Internal Medicine, Medical Clinic III - Hematology, Oncology, Palliative Care, Rostock University Medical Center, Rostock, Germany
| | - Juliane Köhler
- Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center, Rostock, Germany
| | - Bernd Kreikemeyer
- Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center, Rostock, Germany
| | - Claudia Maletzki
- Department of Internal Medicine, Medical Clinic III - Hematology, Oncology, Palliative Care, Rostock University Medical Center, Rostock, Germany.
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Gboko KDT, Traoré SG, Sanhoun AR, Kirioua J, Otaru N, Kurt F, Jaeger FN, Isenring J, Kaindi DWM, Kreikemeyer B, Renault P, Hattendorf J, Meile L, Jans C, Nguetta R, Bonfoh B. Risk factors for the carriage of Streptococcus infantarius subspecies infantarius isolated from African fermented dairy products. PLoS One 2019; 14:e0225452. [PMID: 31774832 PMCID: PMC6881063 DOI: 10.1371/journal.pone.0225452] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 11/05/2019] [Indexed: 02/07/2023] Open
Abstract
Streptococcus infantarius subsp. infantarius (Sii) has been identified as predominant lactic acid bacteria in spontaneously fermented dairy products (FDPs) in sub-Saharan Africa including Côte d'Ivoire. However, Sii belongs to the Streptococcus bovis/Streptococcus equinus complex (SBSEC). Most SBSEC members are assumed to be involved as opportunistic pathogens in serious diseases in both humans and animals. A population-based cross-sectional survey, including 385 participants was conducted in Korhogo, northern Côte d'Ivoire, to identify risk factors for Sii fecal carriage, including consumption of local FDPs. A structured questionnaire was used to gather participant's socio-demographic and economic characteristics, their relation to livestock and dietary habits. In addition, fresh stool and milk samples were collected. The identification of Sii was done using a SBSEC-specific PCR assay targeting 16S rRNA and groEL genes. The overall prevalence of SBSEC and Sii carriage was 23.2% (confidence interval CI 95% = 18.9-27.5) and 12.0% (CI 95% = 8.4-15.5) for stool, respectively. Prevalence of Sii was significantly higher in consumers of artisanal butter compared with non-consumers (57.1% vs 10.1%, odds ratio OR: 11.9, 95% CI: 3.9-36.6), as well as in persons handling livestock (OR = 3.9; 95% CI = 1.6-9.3) and livestock primary products (OR = 5.7; 95% CI = 2.3-14.3). The closer contact with livestock was a risk factor for Sii fecal carriage. Sii strains were isolated from fresh and fermented milk products with a prevalence of 30.4% and 45.4%, respectively. Analysis of Sii population structure through the SBSEC multi locus sequence typing assay revealed a close relationship across human and dairy isolates, possibly linked to a Kenyan human isolate. All these outcomes underline the interest of in-depth investigations on the ecology, potential reservoirs and pathways of contamination by Sii at the human-animal-environment interface in comparison to yet to be collected data from Europe, Asia and the Americas to further elucidate the various roles of Sii.
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Affiliation(s)
- Kossia D T Gboko
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Adiopodoumé Yopougon, Abidjan, Côte d'Ivoire
| | - Sylvain G Traoré
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Adiopodoumé Yopougon, Abidjan, Côte d'Ivoire.,University of Peleforo Gon Coulibaly, Korhogo, Côte d'Ivoire
| | - Aimé R Sanhoun
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Adiopodoumé Yopougon, Abidjan, Côte d'Ivoire.,University of Nangui Abrogoua, Abidjan, Côte d'Ivoire
| | - Jérôme Kirioua
- University of Peleforo Gon Coulibaly, Korhogo, Côte d'Ivoire
| | - Nize Otaru
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 7, Zurich, Switzerland
| | - Fabienne Kurt
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 7, Zurich, Switzerland
| | - Fabienne N Jaeger
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - Julia Isenring
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 7, Zurich, Switzerland
| | - Dasel W M Kaindi
- Department of Food Science, Nutrition and Technology, University of Nairobi, Nairobi, Kenya
| | - Bernd Kreikemeyer
- Institute of Medical Microbiology, Virology, and Hygiene, Rostock University Medical Centre Rostock, Germany
| | - Pierre Renault
- Institut National de la Recherche Agronomique, UMR 1319 MICALIS, Jouy-en-Josas, France
| | - Jan Hattendorf
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - Leo Meile
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 7, Zurich, Switzerland
| | - Christoph Jans
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich, Schmelzbergstrasse 7, Zurich, Switzerland
| | - Roland Nguetta
- Institut de cardiologie d'Abidjan (ICA), Abidjan, Côte d'Ivoire.,Université Felix Houphouët-Boigny, Abidjan, Côte d'Ivoire
| | - Bassirou Bonfoh
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Adiopodoumé Yopougon, Abidjan, Côte d'Ivoire.,Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
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Wambui J, Njage PMK, Tasara T, Buys EM. Meta-Analysis and Meta-Regression Indicate Dynamic Prevalence and Moderators of Foodborne Pathogens in African Indigenous Fermented Milk. Microorganisms 2019; 7:microorganisms7110563. [PMID: 31739578 PMCID: PMC6921058 DOI: 10.3390/microorganisms7110563] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 10/29/2019] [Accepted: 11/01/2019] [Indexed: 11/16/2022] Open
Abstract
As more microbiological data for indigenous fermented milk (IFM) becomes available, concern about their microbial safety becomes eminent. Nonetheless, these data are highly fragmented, and a tool is required to integrate existing data and to provide a basis for data-driven decision making for IFM’s safety. Therefore, meta-analysis and meta-regression were conducted to estimate the prevalence of foodborne pathogens in IFM and to determine factors influencing the estimated values. Using Africa as a case, searches were systematically made for published data and relevant grey literature. Data from 18 studies in 15 countries were analyzed. Staphylococcus aureus (37%), pathogenic Escherichia coli (16%), Listeria monocytogenes (6%), and Salmonella spp. (3%) were the most prevalent pathogens with a pooled prevalence estimate of 12%. Heterogeneity among prevalence estimates was attributed to sampling point and microbial group but could be moderated by publication year, country cluster, and methods for microbial confirmation. The pooled prevalence estimates increased over time as more studies became available, whereby the odds were higher in studies from 2010 onwards than studies before 2010. From the analyses, S. aureus presented the greatest safety concern in African IFM. Future microbiological studies should take into consideration different IFM sampling points and advanced analytical methods to identify pathogens.
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Affiliation(s)
- Joseph Wambui
- Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 272, 8057 Zurich, Switzerland;
- Correspondence: (J.W.); (E.M.B.); Tel.: +41-44-635-86-51; Fax: +41-44-635-89-08 (J.W.)
| | - Patrick Murigu Kamau Njage
- Division for Epidemiology and Microbial Genomics, National Food Institute, Technical University of Denmark, Kemitorvet, Building 204, 2800 Kongens Lyngby, Denmark;
| | - Taurai Tasara
- Institute for Food Safety and Hygiene, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 272, 8057 Zurich, Switzerland;
| | - Elna Maria Buys
- Department of Consumer and Food Sciences, University of Pretoria, Lynwood Road, Pretoria 0002, South Africa
- Correspondence: (J.W.); (E.M.B.); Tel.: +41-44-635-86-51; Fax: +41-44-635-89-08 (J.W.)
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12
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Trotta A, Sposato A, Marinaro M, Zizzo N, Passantino G, Parisi A, Buonavoglia D, Corrente M. Neurological symptoms and mortality associated with Streptococcus gallolyticus subsp. pasteurianus in calves. Vet Microbiol 2019; 236:108369. [PMID: 31500733 DOI: 10.1016/j.vetmic.2019.07.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 07/19/2019] [Accepted: 07/20/2019] [Indexed: 12/24/2022]
Abstract
Suppurative meningitis-meningoencephalitis (M-ME) is a sporadic disease in neonatal ungulates and only a few studies have reported the involvement of Streptococcus bovis/Streptococcus equinus complex (SBSEC) members in bovine neonatal M-ME. The SBSEC taxonomy was recent revised and previous biotype II/2 was reclassified as S. gallolyticus subsp. pasteurianus (SGP). The aim of this study was to describe a case of fatal neonatal neurological syndrome associated with SGP in calves. Ten calves were monitored because of neurological hyperacute symptoms associate with bilateral hypopyon and death. They were not fed with maternal colostrum; two of them died and were subjected to bacteriological, histopathological and biomolecular analysis as well as antibiotic susceptibility test. Both animals presented lesions mostly concentrated to meninges and brain and had bilateral hypopyon. Nine strains isolated in purity from brain, ocular humors and colon were identified as S. bovis group by using the API Strep system and as S. gallolyticus by using the 16S rRNA sequence. Two of these strains where subjected to WGS analysis that confirmed the sub-species identification and the clonality of the two SGP strains. The strains were found resistant to OT, SXT, MTZ and EN and susceptible to AMP, AMC, KZ and CN. We hypothesized that the syndrome observed could be due to the lack of maternal colostrum feeding. A timely and precise diagnosis could have likely prevented the death of the calves and, since the zoonotic potential of SBSECs members is known, accurate and rapid identification is required.
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Affiliation(s)
- Adriana Trotta
- Department of Veterinary Medicine, University of Bari "Aldo Moro", Str. Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy.
| | - Alessio Sposato
- Department of Veterinary Medicine, University of Bari "Aldo Moro", Str. Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - Mariarosaria Marinaro
- Department of Infectious Diseases, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - Nicola Zizzo
- Department of Veterinary Medicine, University of Bari "Aldo Moro", Str. Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - Giuseppe Passantino
- Department of Veterinary Medicine, University of Bari "Aldo Moro", Str. Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - Antonio Parisi
- Istituto Zooprofilattico Sperimentale di Puglia e Basilicata, Sezione di Putignano, Contrada San Pietro Piturno, 70017, Putignano, BA, Italy
| | - Domenico Buonavoglia
- Department of Veterinary Medicine, University of Bari "Aldo Moro", Str. Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
| | - Marialaura Corrente
- Department of Veterinary Medicine, University of Bari "Aldo Moro", Str. Prov. per Casamassima Km 3, 70010, Valenzano, BA, Italy
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Khaldi TEM, Kebouchi M, Soligot C, Gomri MA, Kharroub K, Le Roux Y, Roux E. Streptococcus macedonicus strains isolated from traditional fermented milks: resistance to gastrointestinal environment and adhesion ability. Appl Microbiol Biotechnol 2019; 103:2759-2771. [PMID: 30701281 DOI: 10.1007/s00253-019-09651-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 12/27/2018] [Accepted: 01/15/2019] [Indexed: 12/12/2022]
Abstract
In this study, Streptococcus macedonicus (S. macedonicus) strains were identified from Algerian traditional fermented milks (Lben and Rayeb). Important prerequisites of probiotic interest such as acidity, bile salts tolerance, and adhesion ability to epithelial cells were investigated. A combination of phenotypic (ability to grow on Bile Esculin Azide medium, BEA; on high salt content medium NaCl 6.5%; on alkaline medium pH 9.6) and genotypic approaches (16S rRNA, ITS genes sequencing and MLST technique) allowed to identify four genetically distinct strains of S. macedonicus. These four strains and two references, Streptococcus thermophilus LMD-9 and Lactobacillus rhamnosus GG (LGG), were tested for their capacity to survive at low pH values, and at different concentrations of an equimolar bile salts mixture (BSM). Two different cell lines, Caco-2 TC7 and HT29-MTX, were used for the adhesion study. The results show that S. macedonicus strains selected constitute a distinct genetic entity from the Greek strain S. macedonicus ACA-DC-198. They were able to survive up to pH 3 and could tolerate high concentrations of bile salts (10 mM), unlike LMD-9 and LGG strains. Our strains also display in vitro adhesion similar to the LGG strain on Caco-2 TC7 and higher adhesion than the LMD-9 strain to Caco-2 TC7 and HT29-MTX cell models. This first characterization allows considering S. macedonicus as a potential candidate for possible probiotic effects that need to be investigated.
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Affiliation(s)
- Tedj El Moulouk Khaldi
- Laboratoire Alimentation, Nutrition et Santé (ALNUTS), Institut de la Nutrition, de l'Alimentation et des Technologies Agro Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Route de Ain El Bey, 25000, Constantine, Algeria
| | | | - Claire Soligot
- INRA, URAFPA, Université de Lorraine, F-54000, Nancy, France
| | - Mohamed Amine Gomri
- Laboratoire Biotechnologie et Qualité des Aliments (BIOQUAL), Equipe Métabolites des Extrêmophiles METEX, Institut de la Nutrition, de l'Alimentation et des Technologies Agro Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Route de Ain El Bey, 25000, Constantine, Algeria
| | - Karima Kharroub
- Laboratoire Biotechnologie et Qualité des Aliments (BIOQUAL), Equipe Métabolites des Extrêmophiles METEX, Institut de la Nutrition, de l'Alimentation et des Technologies Agro Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Route de Ain El Bey, 25000, Constantine, Algeria
| | - Yves Le Roux
- INRA, URAFPA, Université de Lorraine, F-54000, Nancy, France
| | - Emeline Roux
- CALBINOTOX, Université de Lorraine, F-54000, Nancy, France.
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An Overview on Streptococcus bovis/Streptococcus equinus Complex Isolates: Identification to the Species/Subspecies Level and Antibiotic Resistance. Int J Mol Sci 2019; 20:ijms20030480. [PMID: 30678042 PMCID: PMC6386949 DOI: 10.3390/ijms20030480] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 01/14/2019] [Accepted: 01/20/2019] [Indexed: 01/09/2023] Open
Abstract
Streptococcus bovis/Streptococcus equinus complex (SBSEC), a non-enterococcal group D Streptococcus spp. complex, has been described as commensal bacteria in humans and animals, with a fecal carriage rate in humans varying from 5% to over 60%. Among streptococci, SBSEC isolates represent the most antibiotic-resistant species—with variable resistance rates reported for clindamycin, erythromycin, tetracycline, and levofloxacin—and might act as a reservoir of multiple acquired genes. Moreover, reduced susceptibility to penicillin and vancomycin associated with mobile genetic elements have also been detected, although rarely. Since the association of SBSEC bacteremia and colon lesions, infective endocarditis and hepatobiliary diseases has been established, particularly in elderly individuals, an accurate identification of SBSEC isolates to the species and subspecies level, as well as the evaluation of antibiotic resistance, are needed. In this paper, we reviewed the major methods used to identify SBSEC isolates and the antimicrobial resistance rates reported in the scientific literature among SBSEC species.
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Agyei D, Owusu-Kwarteng J, Akabanda F, Akomea-Frempong S. Indigenous African fermented dairy products: Processing technology, microbiology and health benefits. Crit Rev Food Sci Nutr 2019; 60:991-1006. [DOI: 10.1080/10408398.2018.1555133] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Dominic Agyei
- Department of Food Science, University of Otago, Dunedin, New Zealand
| | - James Owusu-Kwarteng
- Department of Food Science and Technology, University of Energy and Natural Resources, Sunyani, Ghana
| | - Fortune Akabanda
- Department of Applied Biology, University for Development Studies, Navrongo, Ghana
| | - Samuel Akomea-Frempong
- Department of Food Science and Technology, Kwame Nkrumah University of Science and Technology (KNUST), Kumasi, Ghana
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16
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Killer J, Mekadim C, Pechar R, Bunešová V, Vlková E. The threonine-tRNA ligase gene region is applicable in classification, typing, and phylogenetic analysis of bifidobacteria. J Microbiol 2018; 56:713-721. [DOI: 10.1007/s12275-018-8167-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/26/2018] [Accepted: 06/27/2018] [Indexed: 11/27/2022]
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17
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Kieser S, Sarker SA, Sakwinska O, Foata F, Sultana S, Khan Z, Islam S, Porta N, Combremont S, Betrisey B, Fournier C, Charpagne A, Descombes P, Mercenier A, Berger B, Brüssow H. Bangladeshi children with acute diarrhoea show faecal microbiomes with increased Streptococcus abundance, irrespective of diarrhoea aetiology. Environ Microbiol 2018; 20:2256-2269. [PMID: 29786169 DOI: 10.1111/1462-2920.14274] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 05/08/2018] [Indexed: 12/22/2022]
Abstract
We report streptococcal dysbiosis in acute diarrhoea irrespective of aetiology. Compared with 20 healthy local controls, 71 Bangladeshi children hospitalized with acute diarrhoea (AD) of viral, mixed viral/bacterial, bacterial and unknown aetiology showed a significantly decreased bacterial diversity with loss of pathways characteristic for the healthy distal colon microbiome (mannan degradation, methylerythritol phosphate and thiamin biosynthesis), an increased proportion of faecal streptococci belonging to the Streptococcus bovis and Streptococcus salivarius species complexes, and an increased level of E. coli-associated virulence genes. No enteropathogens could be attributed to a subgroup of patients. Elevated lytic coliphage DNA was detected in 2 out of 5 investigated enteroaggregative E. coli (EAEC)-infected patients. Streptococcal outgrowth in AD is discussed as a potential nutrient-driven consequence of glucose provided with oral rehydration solution.
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Affiliation(s)
- Silas Kieser
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
| | - Shafiqul A Sarker
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), Nutrition and Clinical Services Division, 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Olga Sakwinska
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
| | - Francis Foata
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
| | - Shamima Sultana
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), Nutrition and Clinical Services Division, 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Zeenat Khan
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), Nutrition and Clinical Services Division, 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Shoheb Islam
- International Centre for Diarrheal Diseases Research, Bangladesh (icddr,b), Nutrition and Clinical Services Division, 68 Shaheed Tajuddin Ahmed Sharani, Mohakhali, Dhaka 1212, Bangladesh
| | - Nadine Porta
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
| | - Séverine Combremont
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
| | - Bertrand Betrisey
- Nestlé Institute of Health Sciences, EPFL Innovation Park, CH-1015, Lausanne, Switzerland
| | - Coralie Fournier
- Nestlé Institute of Health Sciences, EPFL Innovation Park, CH-1015, Lausanne, Switzerland
| | - Aline Charpagne
- Nestlé Institute of Health Sciences, EPFL Innovation Park, CH-1015, Lausanne, Switzerland
| | - Patrick Descombes
- Nestlé Institute of Health Sciences, EPFL Innovation Park, CH-1015, Lausanne, Switzerland
| | - Annick Mercenier
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
| | - Bernard Berger
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
| | - Harald Brüssow
- Gut Ecosystem Department, Institute of Nutritional Science, Nestlé Research Centre, Vers-chez-les-Blanc, CH-1000, Lausanne 26, Switzerland
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18
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Kaindi DWM, Kogi-Makau W, Lule GN, Kreikemeyer B, Renault P, Bonfoh B, Otaru N, Schmid T, Meile L, Hattendorf J, Jans C. Colorectal cancer-associated Streptococcus infantarius subsp. infantarius differ from a major dairy lineage providing evidence for pathogenic, pathobiont and food-grade lineages. Sci Rep 2018; 8:9181. [PMID: 29907746 PMCID: PMC6003927 DOI: 10.1038/s41598-018-27383-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 05/25/2018] [Indexed: 02/07/2023] Open
Abstract
Streptococcus infantarius subsp. infantarius (Sii), a member of the Streptococcus bovis/Streptococcus equinus complex (SBSEC), predominates as dairy-adapted and non-adapted variants in fermented dairy products (FDP) in East and West Africa. Epidemiologic data suggest an association with colorectal cancer for most SBSEC members, including Sii from Kenyan patients. Phylogenetic relationships of East African human (EAH) isolates to those of dairy and pathogenic origin were analysed to better estimate potential health implications via FDP consumption. The MLST-derived population structure was also evaluated to provide host, disease, geography and dairy adaptation associations for 157 SBSEC isolates, including 83 novel Sii/SBSEC isolates of which 40 originated from Kenyan colonoscopy patients. Clonal complex (CC) 90 was delineated as potential pathogenic CC for Sii. Single EAH, West African dairy (WAD), food and animal Sii isolates clustered within CC-90, suggesting a potential link to pathogenic traits for CC-90. The majority of EAH and WAD Sii were clustered in a shared clade distinct from CC-90 and East African dairy (EAD) isolates. This indicates shared ancestry for the EAH and WAD clade and limitations to translate disease associations of EAH and CC-90 to EAD Sii, which could support the separation of pathogenic, pathobiont/commensal and food lineages.
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Affiliation(s)
| | - Wambui Kogi-Makau
- Department of Food Science, Nutrition and Technology, University of Nairobi, Nairobi, Kenya
| | | | - Bernd Kreikemeyer
- Institute of Medical Microbiology, Virology, and Hygiene, Rostock University Medical Centre Rostock, Rostock, Germany
| | - Pierre Renault
- Institut National de la Recherche Agronomique, UMR 1319 MICALIS, Jouy-en-Josas, France
| | - Bassirou Bonfoh
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire, Adiopodoume, Ivory Coast
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Nize Otaru
- Laboratory of Food Biotechnology, ETH Zurich, Zurich, Switzerland
| | - Thomas Schmid
- Laboratory of Food Biotechnology, ETH Zurich, Zurich, Switzerland
| | - Leo Meile
- Laboratory of Food Biotechnology, ETH Zurich, Zurich, Switzerland
| | - Jan Hattendorf
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Christoph Jans
- Laboratory of Food Biotechnology, ETH Zurich, Zurich, Switzerland.
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Papadimitriou K. Novel insight into the pathogenicity of Streptococcus gallolyticus subsp. gallolyticus belonging to the Streptococcus bovis/Streptococcus equinus complex. Virulence 2018; 9:662-665. [PMID: 29405829 PMCID: PMC5955466 DOI: 10.1080/21505594.2018.1432932] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Konstantinos Papadimitriou
- a Laboratory of Dairy Research, Department of Food Science and Human Nutrition , Agricultural University of Athens , Iera Odos 75, Athens , Greece
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20
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Jans C, Boleij A. The Road to Infection: Host-Microbe Interactions Defining the Pathogenicity of Streptococcus bovis/Streptococcus equinus Complex Members. Front Microbiol 2018; 9:603. [PMID: 29692760 PMCID: PMC5902542 DOI: 10.3389/fmicb.2018.00603] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/15/2018] [Indexed: 12/17/2022] Open
Abstract
The Streptococcus bovis/Streptococcus equinus complex (SBSEC) comprises several species inhabiting the animal and human gastrointestinal tract (GIT). They match the pathobiont description, are potential zoonotic agents and technological organisms in fermented foods. SBSEC members are associated with multiple diseases in humans and animals including ruminal acidosis, infective endocarditis (IE) and colorectal cancer (CRC). Therefore, this review aims to re-evaluate adhesion and colonization abilities of SBSEC members of animal, human and food origin paired with genomic and functional host-microbe interaction data on their road from colonization to infection. SBSEC seem to be a marginal population during GIT symbiosis that can proliferate as opportunistic pathogens. Risk factors for human colonization are considered living in rural areas and animal-feces contact. Niche adaptation plays a pivotal role where Streptococcus gallolyticus subsp. gallolyticus (SGG) retained the ability to proliferate in various environments. Other SBSEC members have undergone genome reduction and niche-specific gene gain to yield important commensal, pathobiont and technological species. Selective colonization of CRC tissue is suggested for SGG, possibly related to increased adhesion to cancerous cell types featuring enhanced collagen IV accessibility. SGG can colonize, proliferate and may shape the tumor microenvironment to their benefit by tumor promotion upon initial neoplasia development. Bacteria cell surface structures including lipotheichoic acids, capsular polysaccharides and pilus loci (pil1, pil2, and pil3) govern adhesion. Only human blood-derived SGG contain complete pilus loci and other disease-associated surface proteins. Rumen or feces-derived SGG and other SBSEC members lack or harbor mutated pili. Pili also contribute to binding to fibrinogen upon invasion and translocation of cells from the GIT into the blood system, subsequent immune evasion, human contact system activation and collagen-I-binding on damaged heart valves. Only SGG carrying complete pilus loci seem to have highest IE potential in humans with significant links between SGG bacteremia/IE and underlying diseases including CRC. Other SBSEC host-microbe combinations might rely on currently unknown mechanisms. Comparative genome data of blood, commensal and food isolates are limited but required to elucidate the role of pili and other virulence factors, understand pathogenicity mechanisms, host specificity and estimate health risks for animals, humans and food alike.
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Affiliation(s)
- Christoph Jans
- Laboratory of Food Biotechnology, Institute of Food Nutrition and Health, Department of Health Science and Technology, ETH Zurich, Zurich, Switzerland
| | - Annemarie Boleij
- Department of Pathology, Radboud Institute for Molecular Life Sciences, Radboudumc, Nijmegen, Netherlands
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Kaindi DWM, Kogi-Makau W, Lule GN, Kreikemeyer B, Renault P, Bonfoh B, Schelling E, Zinsstag J, Lacroix C, Meile L, Jans C, Hattendorf J. Investigating the association between African spontaneously fermented dairy products, faecal carriage of Streptococcus infantarius subsp. infantarius and colorectal adenocarcinoma in Kenya. Acta Trop 2018; 178:10-18. [PMID: 29079186 PMCID: PMC5766739 DOI: 10.1016/j.actatropica.2017.10.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 10/18/2017] [Accepted: 10/22/2017] [Indexed: 12/22/2022]
Abstract
Consumption of traditional fermented dairy products (tFDP) in Africa leads to the ingestion of up to 108Streptococcus infantarius subspecies infantarius (Sii) per millilitre of spontaneously fermented milk. Sii is a member of the Streptococcus bovis/Streptococcus equinus complex (SBSEC) for which some members are associated particularly with colorectal cancer or endocarditis. The extent of health risks to tFDP consumers is largely unknown. A hospital-based unmatched case-control study was conducted at Kenyatta National Hospital, Nairobi (Kenya) on 80 cases and 193 controls that were selected exhaustively from patients attending colonoscopy at the hospital. Logistic regression models adjusted for age, sex and residency were used in the statistical analysis. Consumption of tFDP was not associated with CRC (odds ratio (OR) 1.4; 95% Confidence interval (CI) 0.7-2.7; p=0.34). Risk factors associated with CRC included age above 40 years, and consumption of processed meat and alcohol. Faecal carriage of Sii was significantly higher in persons with colon tumours and polyps compared to controls (8.4% vs 21.6%: OR: 4.6; CI 1.3-15.9). Patients with haemorrhoids represented an unexpected carrier group with significantly higher Sii faecal carriage (30.4%, CI: 17.7-45.8). Consumption of tFDP does not represent risk factors for CRC whereas Sii seems to be associated with CRC. However, there is urgent need to assess this finding also in the general population, investigate the causality of SBSEC, Sii and CRC as well as compare the phylogenetic, functional and genomic relationship between human and dairy Sii with regards to the ongoing application of Sii in FDP production.
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Affiliation(s)
- Dasel W M Kaindi
- Department of Food Science, Nutrition and Technology, University of Nairobi, P. O. Box 29053 - 00625, Nairobi, Kenya.
| | - Wambui Kogi-Makau
- Department of Food Science, Nutrition and Technology, University of Nairobi, P. O. Box 29053 - 00625, Nairobi, Kenya.
| | - Godfrey N Lule
- School of Medicine, University of Nairobi, P. O. Box 19676, Nairobi, Kenya.
| | - Bernd Kreikemeyer
- Institute of Medical Microbiology, Virology, Hygiene and Bacteriology, Rostock University Medical Center Rostock, Schillingallee 70, 18055 Rostock, Germany.
| | - Pierre Renault
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France.
| | - Bassirou Bonfoh
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Km 17, Adiopodoumé, Rte Dabou, 01 BP 1303 Abidjan 01, Cote d'Ivoire; Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002 Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland.
| | - Esther Schelling
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002 Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland.
| | - Jakob Zinsstag
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002 Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland.
| | - Christophe Lacroix
- Laboratory of Food Biotechnology, Institute of Food Nutrition and Health, Department of Health Science and Technology, ETH Zurich, LFV C22, Schmelzbergstrasse 7, 8092 Zurich, Switzerland.
| | - Leo Meile
- Laboratory of Food Biotechnology, Institute of Food Nutrition and Health, Department of Health Science and Technology, ETH Zurich, LFV C22, Schmelzbergstrasse 7, 8092 Zurich, Switzerland.
| | - Christoph Jans
- Laboratory of Food Biotechnology, Institute of Food Nutrition and Health, Department of Health Science and Technology, ETH Zurich, LFV C22, Schmelzbergstrasse 7, 8092 Zurich, Switzerland.
| | - Jan Hattendorf
- Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Socinstrasse 57, 4002 Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland.
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Idrees S, Gupta S, Mantilla M, Goyal P, Hulinsky I. Unusual cause of severe diabetic ketoacidosis precipitated by Streptococcus bovis/equinus (SBSEC) bacteremia: Case report and review of literature. IDCases 2018; 11:53-55. [PMID: 29349041 PMCID: PMC5767840 DOI: 10.1016/j.idcr.2017.12.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/02/2017] [Accepted: 12/02/2017] [Indexed: 12/27/2022] Open
Abstract
Diabetic ketoacidosis is a feared complication in patients with diabetes mellitus and poses high risk of mortality and morbidity unless treated in timely manner. Infection is one of the most common precipitating factors for the development of diabetic ketoacidosis. Bacteremia with Group A and Group B beta hemolytic streptococcal strains are well known, however nonenterococcal Group D strains such as the Streptococcus bovis/Streptococcus equinus complex (SBSEC) still remains an understudied entity. Here we present a case of a 35-year-old Type I diabetic female presenting with severe diabetic ketoacidosis with overlapping features of hyperosmolar hyperglycemia, precipitated by Streptococcus alactolyticus bacteremia, successfully treated with four-week course of parenteral ceftriaxone. This case report emphasizes the potential importance of SBSEC as an emerging pathologic strain and culprit for triggering diabetic ketoacidosis which requires prompt diagnosis and targeted therapy.
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Affiliation(s)
- Sana Idrees
- Department of Internal Medicine, St. Vincent's Medical Center, Bridgeport, CT, USA
| | - Sonali Gupta
- Department of Internal Medicine, St. Vincent's Medical Center, Bridgeport, CT, USA
| | - Miguel Mantilla
- Department of Internal Medicine, St. Vincent's Medical Center, Bridgeport, CT, USA
| | - Pradeep Goyal
- Department of Radiology, St. Vincent's Medical Center, Bridgeport, CT, USA
| | - Ilja Hulinsky
- Department of Internal Medicine, St. Vincent's Medical Center, Bridgeport, CT, USA
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23
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Isenring J, Köhler J, Nakata M, Frank M, Jans C, Renault P, Danne C, Dramsi S, Kreikemeyer B, Oehmcke-Hecht S. Streptococcus gallolyticus subsp. gallolyticus endocarditis isolate interferes with coagulation and activates the contact system. Virulence 2017; 9:248-261. [PMID: 29072555 PMCID: PMC5955193 DOI: 10.1080/21505594.2017.1393600] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Streptococcus gallolyticus subsp. gallolyticus, formerly classified as S. bovis biotype I, is an increasing cause of bacteremia and infective endocarditis in the elderly. The physiopathology of infective endocarditis is poorly understood and involves immune and coagulation systems. In this study, we found that S. gallolyticus subsp. gallolyticus activates the human contact system, which in turn has two consequences: cleavage of high-molecular-weight kininogen (HK) resulting in release of the potent pro-inflammatory peptide bradykinin, and initiation of the intrinsic pathway of coagulation. S. gallolyticus subsp. gallolyticus was found to bind and activate factors of the human contact system at its surface, leading to a significant prolongation of the intrinsic coagulation time and to the release of bradykinin. High-affinity binding of factor XII to the bacterial Pil1 collagen binding protein was demonstrated with a KD of 13 nM. Of note, Pil1 expression was exclusively found in S. gallolyticus subsp. gallolyticus, further supporting an essential contribution of this pilus in virulence.
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Affiliation(s)
- Julia Isenring
- a Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center , Rostock , Germany.,b Nutrition and Health, Laboratory of Food Biotechnology, Institute of Food, ETH Zürich , Zürich , Switzerland
| | - Juliane Köhler
- a Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center , Rostock , Germany
| | - Masanobu Nakata
- a Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center , Rostock , Germany.,c Department of Oral and Molecular Microbiology , Osaka University Graduate School of Dentistry , Suita , Osaka , Japan
| | - Marcus Frank
- d Medical Biology and Electron Microscopy Centre, Rostock University Medical Center , Rostock , Germany
| | - Christoph Jans
- b Nutrition and Health, Laboratory of Food Biotechnology, Institute of Food, ETH Zürich , Zürich , Switzerland
| | - Pierre Renault
- e Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay , Jouy-en-Josas , France
| | - Camille Danne
- f Unité de Biologie des Bactéries Pathogènes à Gram-positif, Institut Pasteur , Paris , France , Centre National de la Recherche Scientifique (CNRS) ERL3526
| | - Shaynoor Dramsi
- f Unité de Biologie des Bactéries Pathogènes à Gram-positif, Institut Pasteur , Paris , France , Centre National de la Recherche Scientifique (CNRS) ERL3526
| | - Bernd Kreikemeyer
- a Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center , Rostock , Germany
| | - Sonja Oehmcke-Hecht
- a Institute of Medical Microbiology, Virology and Hygiene, Rostock University Medical Center , Rostock , Germany
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24
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Fugl A, Berhe T, Kiran A, Hussain S, Laursen MF, Bahl MI, Hailu Y, Sørensen KI, Guya ME, Ipsen R, Hansen EB. Characterisation of lactic acid bacteria in spontaneously fermented camel milk and selection of strains for fermentation of camel milk. Int Dairy J 2017. [DOI: 10.1016/j.idairyj.2017.04.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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25
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Pechar R, Killer J, Mekadim C, Geigerová M, Rada V. Classification of Culturable Bifidobacterial Population from Colonic Samples of Wild Pigs (Sus scrofa) Based on Three Molecular Genetic Methods. Curr Microbiol 2017; 74:1324-1331. [PMID: 28756573 DOI: 10.1007/s00284-017-1320-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 07/25/2017] [Indexed: 12/24/2022]
Abstract
Occurrence of bifidobacteria, known as health-promoting probiotic microorganisms, in the digestive tract of wild pigs (Sus scrofa) has not been examined yet. One hundred forty-nine fructose-6-phosphate phosphoketolase positive bacterial strains were isolated from colonic content of twenty-two individuals of wild pigs originated from four localities in the Czechia. Based on PCR-DGGE technique targeting the variable V3 region of the 16S rRNA genes, strains were initially differentiated into four groups represented by: (i) probably a new Bifidobacterium species (89 strains), (ii) B. boum/B. thermophilum/B. thermacidophilum subsp. porcinum/B. thermacidophilum subsp. thermacidophilum (sub)species (49 strains), (iii) Pseudoscardovia suis (7 strains), and (iv) B. pseudolongum subsp. globosum/B. pseudolongum subsp. pseudolongum (4 strains), respectively. Given the fact that DGGE technique did not allow to differentiate the representatives of thermophilic bifidobacteria and B. pseudolongum subspecies, strains were further classified by the 16S rRNA and thrS gene sequences. Primers targeting the variable regions of the latter gene were designed to be applicable in identification and phylogeny of Bifidobacteriaceae family. The 16S rRNA-derived phylogenetic study classified members of the first group into five subgroups in a separated cluster of thermophilic bifidobacteria. Comparable results were obtained by the thrS-derived phylogenetic analysis. Remarkably, variability among thrS sequences was higher compared with 16S rRNA gene sequences. Overall, molecular genetic techniques application allowed to identify a new Bifidobacterium phylotype which is predominant in the digestive tract of examined wild pigs.
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Affiliation(s)
- Radko Pechar
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamýcká 129, Suchdol, 165 00, Prague 6, Czech Republic.,Food Research Institute Prague, Radiová 1285/7, Hostivař, 102 00, Prague 10, Czech Republic
| | - Jiří Killer
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamýcká 129, Suchdol, 165 00, Prague 6, Czech Republic. .,Institute of Animal Physiology and Genetics v.v.i, Czech Academy of Sciences, Vídeňská 1083, Krč, 142 20, Prague 4, Czech Republic.
| | - Chahrazed Mekadim
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamýcká 129, Suchdol, 165 00, Prague 6, Czech Republic
| | - Martina Geigerová
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamýcká 129, Suchdol, 165 00, Prague 6, Czech Republic
| | - Vojtěch Rada
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamýcká 129, Suchdol, 165 00, Prague 6, Czech Republic
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26
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Jans C, Meile L, Kaindi DWM, Kogi-Makau W, Lamuka P, Renault P, Kreikemeyer B, Lacroix C, Hattendorf J, Zinsstag J, Schelling E, Fokou G, Bonfoh B. African fermented dairy products - Overview of predominant technologically important microorganisms focusing on African Streptococcus infantarius variants and potential future applications for enhanced food safety and security. Int J Food Microbiol 2017; 250:27-36. [PMID: 28364623 DOI: 10.1016/j.ijfoodmicro.2017.03.012] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 03/16/2017] [Accepted: 03/20/2017] [Indexed: 12/17/2022]
Abstract
Milk is a major source of nutrients, but can also be a vehicle for zoonotic foodborne diseases, especially when raw milk is consumed. In Africa, poor processing and storage conditions contribute to contamination, outgrowth and transmission of pathogens, which lead to spoilage, reduced food safety and security. Fermentation helps mitigate the impact of poor handling and storage conditions by enhancing shelf life and food safety. Traditionally-fermented sour milk products are culturally accepted and widely distributed in Africa, and rely on product-specific microbiota responsible for aroma, flavor and texture. Knowledge of microbiota and predominant, technologically important microorganisms is critical in developing products with enhanced quality and safety, as well as sustainable interventions for these products, including Africa-specific starter culture development. This narrative review summarizes current knowledge of technologically-important microorganisms of African fermented dairy products (FDP) and raw milk, taking into consideration novel findings and taxonomy when re-analyzing data of 29 publications covering 25 products from 17 African countries. Technologically-important lactic acid bacteria such as Lactococcus lactis and Streptococcus infantarius subsp. infantarius (Sii), Lactobacillus spp. and yeasts predominated in raw milk and FDP across Africa. Re-analysis of data also suggests a much wider distribution of Sii and thus a potentially longer history of use than previously expected. Therefore, evaluating the role and safety of African Sii lineages is important when developing interventions and starter cultures for FDP in Africa to enhance food safety and food security. In-depth functional genomics, epidemiologic investigations and latest identification approaches coupled with stakeholder involvement will be required to evaluate the possibility of African Sii lineages as novel food-grade Streptococcus lineage.
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Affiliation(s)
- Christoph Jans
- Laboratory of Food Biotechnology, Institute of Food Nutrition and Health, Department of Health Science and Technology, ETH Zurich, LFV C22, Schmelzbergstrasse 7, 8092 Zurich, Switzerland
| | - Leo Meile
- Laboratory of Food Biotechnology, Institute of Food Nutrition and Health, Department of Health Science and Technology, ETH Zurich, LFV C22, Schmelzbergstrasse 7, 8092 Zurich, Switzerland
| | - Dasel Wambua Mulwa Kaindi
- Department of Food Science, Nutrition and Technology, College of Agriculture and Veterinary Sciences, University of Nairobi, P.O. Box 29053, 00625 Nairobi, Kenya
| | - Wambui Kogi-Makau
- Department of Food Science, Nutrition and Technology, College of Agriculture and Veterinary Sciences, University of Nairobi, P.O. Box 29053, 00625 Nairobi, Kenya
| | - Peter Lamuka
- Department of Food Science, Nutrition and Technology, College of Agriculture and Veterinary Sciences, University of Nairobi, P.O. Box 29053, 00625 Nairobi, Kenya
| | - Pierre Renault
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Bernd Kreikemeyer
- Institute of Medical Microbiology, Virology, Hygiene and Bacteriology, Rostock University Medical Center Rostock, Schillingallee 70, 18055 Rostock, Germany
| | - Christophe Lacroix
- Laboratory of Food Biotechnology, Institute of Food Nutrition and Health, Department of Health Science and Technology, ETH Zurich, LFV C22, Schmelzbergstrasse 7, 8092 Zurich, Switzerland
| | - Jan Hattendorf
- Swiss Tropical and Public Health Institute, Socinstrasse 57, Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland
| | - Jakob Zinsstag
- Swiss Tropical and Public Health Institute, Socinstrasse 57, Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland
| | - Esther Schelling
- Swiss Tropical and Public Health Institute, Socinstrasse 57, Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland
| | - Gilbert Fokou
- Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Km 17, Adiopodoumé, Rte Dabou, 01 BP 1303 Abidjan 01, Côte d'Ivoire
| | - Bassirou Bonfoh
- Swiss Tropical and Public Health Institute, Socinstrasse 57, Basel, Switzerland; University of Basel, Petersplatz 1, 4003 Basel, Switzerland; Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS), Km 17, Adiopodoumé, Rte Dabou, 01 BP 1303 Abidjan 01, Côte d'Ivoire.
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27
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Whole-Genome Sequence of the Cheese Isolate Streptococcus macedonicus 679. GENOME ANNOUNCEMENTS 2016; 4:4/5/e01025-16. [PMID: 27660795 PMCID: PMC5034146 DOI: 10.1128/genomea.01025-16] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
It is well recognized that Streptococcus macedonicus can populate artisanal fermented foods, especially those of dairy origin. However, the safety of S. macedonicus remains to be established. Here, we present the whole-genome sequence of strain 679, which was isolated from a French uncooked semihard cheese made with cow milk.
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28
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Vazquez-Gutierrez P, de Wouters T, Werder J, Chassard C, Lacroix C. High Iron-Sequestrating Bifidobacteria Inhibit Enteropathogen Growth and Adhesion to Intestinal Epithelial Cells In vitro. Front Microbiol 2016; 7:1480. [PMID: 27713730 PMCID: PMC5031772 DOI: 10.3389/fmicb.2016.01480] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/06/2016] [Indexed: 12/18/2022] Open
Abstract
The gut microbiota plays an important role in host health, in particular by its barrier effect and competition with exogenous pathogenic bacteria. In the present study, the competition of Bifidobacterium pseudolongum PV8-2 (Bp PV8-2) and Bifidobacterium kashiwanohense PV20-2 (Bk PV20-2), isolated from anemic infant gut microbiota and selected for their high iron sequestration properties, was investigated against Salmonella Typhimurium (S. Typhi) and Escherichia coli O157:H45 (EHEC) by using co-culture tests and assays with intestinal cell lines. Single and co-cultures were carried out anaerobically in chemically semi-defined low iron (1.5 μM Fe) medium (CSDLIM) without and with added ferrous iron (30 μM Fe). Surface properties of the tested strains were measured by bacterial adhesion to solvent xylene, chloroform, ethyl acetate, and to extracellular matrix molecules, mucus II, collagen I, fibrinogen, fibronectin. HT29-MTX mucus-secreting intestinal cell cultures were used to study bifidobacteria competition, inhibition and displacement of the enteropathogens. During co-cultures in CSDLIM we observed strain-dependent inhibition of bifidobacterial strains on enteropathogens, independent of pH, organic acid production and supplemented iron. Bp PV8-2 significantly (P < 0.05) inhibited S. Typhi N15 and EHEC after 24 h compared to single culture growth. In contrast Bk PV20-2 showed less inhibition on S. Typhi N15 than Bp PV8-2, and no inhibition on EHEC. Affinity for intestinal cell surface glycoproteins was strain-specific, with high affinity of Bp PV8-2 for mucin and Bk PV20-2 for fibronectin. Bk PV20-2 showed high adhesion potential (15.6 ± 6.0%) to HT29-MTX cell layer compared to Bp PV8-2 (1.4 ± 0.4%). In competition, inhibition and displacement tests, Bp PV8-2 significantly (P < 0.05) reduced S. Typhi N15 and EHEC adhesion, while Bk PV20-2 was only active on S. Typhi N15 adhesion. To conclude, bifidobacterial strains selected for their high iron binding properties inhibited S. Typhi N15 and EHEC in co-culture experiments and efficiently competed with the enteropathogens on mucus-producing HT29-MTX cell lines. Further studies in complex gut ecosystems should explore host protection effects of Bp PV8-2 and Bk PV20-2 mediated by nutritional immunity mechanism associated with iron-binding.
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Affiliation(s)
- Pamela Vazquez-Gutierrez
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich Zürich, Switzerland
| | - Tomas de Wouters
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich Zürich, Switzerland
| | - Julia Werder
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich Zürich, Switzerland
| | - Christophe Chassard
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich Zürich, Switzerland
| | - Christophe Lacroix
- Laboratory of Food Biotechnology, Institute of Food, Nutrition and Health, ETH Zurich Zürich, Switzerland
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