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Di Lodovico S, Petrini M, Di Fermo P, De Pasquale V, De Martino L, D'Ercole S, Nocera FP, Di Giulio M. Staphylococcus pseudintermedius and Pseudomonas aeruginosa Lubbock Chronic Wound Biofilm (LCWB): a suitable dual-species model for in vitro studies. Microbes Infect 2024:105384. [PMID: 38944110 DOI: 10.1016/j.micinf.2024.105384] [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: 05/04/2024] [Revised: 06/21/2024] [Accepted: 06/21/2024] [Indexed: 07/01/2024]
Abstract
Antimicrobial treatment of methicillin-resistant Staphylococcus pseudintermedius associated with canine wounds represents an important challenge. The aim of this study was to create a canine wound infection model, Lubbock Chronic Wound Biofilm (LCWB), with a focus on S. pseudintermedius, drawing inspiration from the established human model involving Staphylococcus aureus. Methicillin-resistant S. pseudintermedius 115 (MRSP) and Pseudomonas aeruginosa 700 strains, isolated from dog wounds, were used to set up the LCWB at 24, 48 and 72 h. The LCWBs were evaluated in terms of volume, weight, and microbial CFU/mg. The microbial spatial distribution in the LCWBs was assessed by SEM and CLSM imaging. The best incubation time for the LCWB production in terms of volume (3.38 cm3 ± 0.13), weight (0.86 gr ± 0.02) and CFU/mg (up to 7.05 × 106 CFU/mg ± 2.89 × 105) was 48 h. The SEM and CLSM images showed a major viable microbial colonization at 48 h with non-mixed bacteria with a prevalence of MRSP on the surface and P. aeruginosa 700 in the depth of the wound. The obtained findings demonstrate the capability of S. pseudintermedius to grow together P. aeruginosa in the LCWB model, representing the suitable model to reproduce the animal chronic wound in vitro.
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Affiliation(s)
- Silvia Di Lodovico
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
| | - Morena Petrini
- Department of Medical, Oral and Biotechnological Sciences, University "G. d'Annunzio" of Chieti, Italy
| | - Paola Di Fermo
- Department of Medical, Oral and Biotechnological Sciences, University "G. d'Annunzio" of Chieti, Italy
| | - Valeria De Pasquale
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy
| | - Luisa De Martino
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy
| | - Simonetta D'Ercole
- Department of Medical, Oral and Biotechnological Sciences, University "G. d'Annunzio" of Chieti, Italy
| | - Francesca Paola Nocera
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy.
| | - Mara Di Giulio
- Department of Pharmacy, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy
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Lopes TS, Fussieger C, Rizzo FA, Silveira S, Lunge VR, Streck AF. Species identification and antimicrobial susceptibility profile of bacteria associated with cow mastitis in southern Brazil. PESQUISA VETERINÁRIA BRASILEIRA 2022. [DOI: 10.1590/1678-5150-pvb-6958] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
ABSTRACT: Bovine mastitis is the most common disease in dairy cattle and responsible for economic losses in the milk industry. The present study aimed to identify the main species and to evaluate the antimicrobial susceptibility of bacterial isolates from cow herds with mastitis in dairy farms from southern Brazil. A total of 107 milk samples were collected from different cow herds in one important dairy producing region in southern Brazil, including farms located in ten cities from the Northeast region in the Rio Grande do Sul state. Bacterial strains were isolated and submitted to presumptive identification by classical bacteriological methods. Bacterial species were also identified by MALDI-TOF MS and antimicrobial susceptibility testing was performed with 12 antimicrobials commonly used in dairy farms. Fifty-one bacterial strains were isolated and the presumptive identification demonstrated the occurrence of Staphylococcus spp. (82.3%), Bacillus spp. (3.9%), Klebsiella spp. (3.9%), Streptococcus spp. (3.9%), Corynebacterium sp. (2%), Enterococcus sp. (2%) and Serratia sp. (2%). Forty-one isolates were successfully identified in the MALDI-TOF analysis, including 35 isolates from eleven different bacterial species. Importantly, there were eight different Staphylococcus species, with a high frequency of Staphylococcus chromogenes (48.6%) and Staphylococcus aureus (20%). Overall, bacterial isolates demonstrated resistance to penicillin (46.3%), tetracycline (39%), amoxicillin (36.6%), ampicillin (34.1%) and sulfamethoxazole/trimethoprim (31.7%). Enrofloxacin was the unique antimicrobial that all isolates were susceptible. In addition, there were six multidrug resistant isolates (five S. chromogenes and one S. aureus). This study highlights that bacterial pathogens with resistance to several antimicrobials were identified in cows from dairy farms in a very important milk producing region located in southern Brazil. Microbial identification of the bovine mastitis pathogens and determination of the antimicrobial profile is necessary for the rational use of the medicines.
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Ahle CM, Stødkilde-Jørgensen K, Poehlein A, Streit WR, Hüpeden J, Brüggemann H. Comparison of three amplicon sequencing approaches to determine staphylococcal populations on human skin. BMC Microbiol 2021; 21:221. [PMID: 34320945 PMCID: PMC8320028 DOI: 10.1186/s12866-021-02284-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/21/2021] [Indexed: 02/08/2023] Open
Abstract
Background Staphylococci are important members of the human skin microbiome. Many staphylococcal species and strains are commensals of the healthy skin microbiota, while few play essential roles in skin diseases such as atopic dermatitis. To study the involvement of staphylococci in health and disease, it is essential to determine staphylococcal populations in skin samples beyond the genus and species level. Culture-independent approaches such as amplicon next-generation sequencing (NGS) are time- and cost-effective options. However, their suitability depends on the power of resolution. Results Here we compare three amplicon NGS schemes that rely on different targets within the genes tuf and rpsK, designated tuf1, tuf2 and rpsK schemes. The schemes were tested on mock communities and on human skin samples. To obtain skin samples and build mock communities, skin swab samples of healthy volunteers were taken. In total, 254 staphylococcal strains were isolated and identified to the species level by MALDI-TOF mass spectrometry. A subset of ten strains belonging to different staphylococcal species were genome-sequenced. Two mock communities with nine and eighteen strains, respectively, as well as eight randomly selected skin samples were analysed with the three amplicon NGS methods. Our results imply that all three methods are suitable for species-level determination of staphylococcal populations. However, the novel tuf2-NGS scheme was superior in resolution power. It unambiguously allowed identification of Staphylococcus saccharolyticus and distinguish phylogenetically distinct clusters of Staphylococcus epidermidis. Conclusions Powerful amplicon NGS approaches for the detection and relative quantification of staphylococci in human samples exist that can resolve populations to the species and, to some extent, to the subspecies level. Our study highlights strengths, weaknesses and pitfalls of three currently available amplicon NGS approaches to determine staphylococcal populations. Applied to the analysis of healthy and diseased skin, these approaches can be useful to attribute host-beneficial and -detrimental roles to skin-resident staphylococcal species and subspecies. Supplementary Information The online version contains supplementary material available at 10.1186/s12866-021-02284-1.
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Affiliation(s)
- Charlotte Marie Ahle
- Beiersdorf AG, Research & Development, Front End Innovation, 20245, Hamburg, Germany.,Department of Microbiology and Biotechnology, University of Hamburg, 22609, Hamburg, Germany
| | | | - Anja Poehlein
- Department of Genomic and Applied Microbiology, Institute of Microbiology and Genetics, University of Göttingen, 37073, Göttingen, Germany
| | - Wolfgang R Streit
- Department of Microbiology and Biotechnology, University of Hamburg, 22609, Hamburg, Germany
| | - Jennifer Hüpeden
- Beiersdorf AG, Research & Development, Front End Innovation, 20245, Hamburg, Germany
| | - Holger Brüggemann
- Department of Biomedicine, Aarhus University, 8000, Aarhus, Denmark.
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González-Martín M, Corbera JA, Suárez-Bonnet A, Tejedor-Junco MT. Virulence factors in coagulase-positive staphylococci of veterinary interest other than Staphylococcus aureus. Vet Q 2021; 40:118-131. [PMID: 32223696 PMCID: PMC7178840 DOI: 10.1080/01652176.2020.1748253] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Coagulase-positive Staphylococci (CoPS) can exist as commensals in humans, companion and food-producing animals, but can cause severe or even lethal diseases. Exchange of these bacteria between humans and animals has been described. Special attention has been focused on Methicillin-Resistant Staphylococcus aureus, but other CoPS can also represent an important threat. In addition to significant antimicrobial resistance, these bacteria may carry a plethora of virulence factors - molecules that allow bacteria to establish on or within a host and increase their ability to cause disease. These virulence factors have been widely described in S. aureus but information about other species of CoPS is scarce. The aim of this paper is to review the recent literature about the virulence factors of non-aureus CoPS of animal origin. Their possible effects on human health are also described. The role and prevalence of different virulence factors including leukocidins, hemolysins, adhesins, enterotoxins, exfoliative and toxic shock syndrome toxins as well as superantigen-like proteins are addressed. The effect of these virulence factors on human health is also described. The possibility of misdiagnosis of species of CoPS has been demonstrated in human clinical samples. Prevalence of zoonotic infections could be higher than thought and medical laboratories should be aware of these other staphylococcal species. In keeping with the ‘One Health’ approach to animal and human disease, medical professionals, veterinarians and health workers should be aware of the risks derived from exposure to these bacteria in people in close contact with animals, including pet owners, farmers and veterinarians themselves.
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Affiliation(s)
- Margarita González-Martín
- Research Institute of Biomedical and Health Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Canary Islands, Spain
| | - Juan Alberto Corbera
- Research Institute of Biomedical and Health Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Canary Islands, Spain
| | - Alejandro Suárez-Bonnet
- Department of Pathobiology and Population Sciences, The Royal Veterinary College, Hatfield, United Kingdom
| | - María Teresa Tejedor-Junco
- Research Institute of Biomedical and Health Sciences, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Canary Islands, Spain
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Shiraishi Y, Kryukov K, Tomomatsu K, Sakamaki F, Inoue S, Nakagawa S, Imanishi T, Asano K. Diagnosis of pleural empyema/parapneumonic effusion by next-generation sequencing. Infect Dis (Lond) 2021; 53:450-459. [PMID: 33689538 DOI: 10.1080/23744235.2021.1892178] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
BACKGROUND Although a microbiological diagnosis of pleural infection is clinically important, it is often complicated by prior antibiotic treatment and/or difficulties with culturing some bacterial species. Therefore, we aimed to identify probable causative bacteria in pleural empyema/parapneumonic effusions by combining 16S ribosomal RNA (rRNA) gene amplification and next-generation sequencing (NGS). METHODS Pleural fluids were collected from 19 patients with infectious effusions and nine patients with non-infectious malignant effusions. We analysed DNA extracted from the pleural fluid supernatant by NGS using the Genome Search Toolkit and GenomeSync database, either directly or after PCR amplification of the 16S rRNA gene. Infectious and non-infectious effusions were distinguished by semi-quantitative PCR of the 16S rRNA gene. RESULTS Only 8 (42%) effusions were culture-positive, however, NGS of the 16S rRNA gene amplicon identified 14 anaerobes and 7 aerobes/facultative anaerobes in all patients, including Streptococcus sp. (n = 6), Fusobacterium sp. (n = 5), Porphyromonas sp. (n = 5), and Prevotella sp. (n = 4), accounting for >10% of the total genomes. The culture and NGS results were discordant for 3 out of 8 patients, all of whom had previously been treated with antibiotics. Total (2ΔCT value in semi-quantitative PCR of the 16S rRNA gene) and specific (total bacterial load multiplied by the proportion of primary bacteria in NGS) bacterial loads could efficiently distinguish empyema/parapneumonic effusion from non-infectious effusion. CONCLUSION Combining NGS with semi-quantitative PCR can facilitate the diagnosis of pleural empyema/parapneumonic effusion and its causal bacteria.
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Affiliation(s)
- Yoshiki Shiraishi
- Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Kirill Kryukov
- Department of Molecular Life Science, Tokai University School of Medicine, Isehara, Japan.,Department of Genomics and Evolutionary Biology, National Institute of Genetics, Mishima, Japan
| | - Katsuyoshi Tomomatsu
- Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Isehara, Japan
| | - Fumio Sakamaki
- Division of Respiratory Disease, Department of Medicine, Tokai University Hachioji Hospital, Tokyo, Japan
| | - Shigeaki Inoue
- Department of Emergency and Critical Care Medicine, Tokai University School of Medicine, Isehara, Japan
| | - So Nakagawa
- Department of Molecular Life Science, Tokai University School of Medicine, Isehara, Japan
| | - Tadashi Imanishi
- Department of Molecular Life Science, Tokai University School of Medicine, Isehara, Japan
| | - Koichiro Asano
- Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Isehara, Japan
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Antimicrobial Resistance of Coagulase-Positive Staphylococcus Isolates Recovered in a Veterinary University Hospital. Antibiotics (Basel) 2020; 9:antibiotics9110752. [PMID: 33138100 PMCID: PMC7692876 DOI: 10.3390/antibiotics9110752] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 10/26/2020] [Accepted: 10/28/2020] [Indexed: 12/18/2022] Open
Abstract
The Staphylococcus pseudintermedius group (SIG) is an emerging threat in veterinary medicine, particularly methicillin-resistant (MRSP) isolates, which are frequently associated with multidrug resistance. Reliable identification of SIG members is critical to establish correct antimicrobial treatments. However, information on the molecular epidemiology and antimicrobial resistance patterns of MRSP in some regions is still limited. This study aimed to assess the antimicrobial resistance of SIG isolates recovered from animals at the Veterinary Teaching Hospital of Complutense University of Madrid (Spain) during a 10-year period (2007-2016). A total of 139 selected Staphylococcus isolates were subjected to species-level identification by different bioanalytical techniques (PCR, VITEK, MALDI-TOF) and subsequent antimicrobial susceptibility testing. Methicillin-resistant isolates (n = 20) were subjected to whole genome sequencing for further characterization of their antibiotic resistance determinants. Our results showed that there was a good correlation between PCR and MALDI-TOF identification, whereas VITEK showed very divergent results, thus confirming MALDI-TOF as a good alternative for species-level identification of coagulase-positive staphylococci. Notably, S. pseudintermedius, including the epidemic MRSP genotype ST71, was the only SIG species found among canine isolates. In addition, we found a high prevalence of multidrug resistance and resistance to fluoroquinolones, cephalosporins and macrolides. Finally, diverse genes associated with antibiotic resistance were detected among MRSP isolates, although the genetic basis of some of the resistant phenotypes (particularly to fluoroquinolones) could not be determined. In conclusion, our study reveals the circulation of MRSP in the veterinary setting in Spain, thus highlighting the emerging threat posed by this bacterial group and the need for further epidemiological surveillance.
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Performance of Five Commercial Identification Platforms for Identification of Staphylococcus delphini. J Clin Microbiol 2019; 57:JCM.00721-19. [PMID: 31413084 DOI: 10.1128/jcm.00721-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 08/07/2019] [Indexed: 01/23/2023] Open
Abstract
The Staphylococcus intermedius group (SIG) is a collection of coagulase-positive staphylococci consisting of four distinct species, namely, Staphylococcus cornubiensis, Staphylococcus delphini, Staphylococcus intermedius, and Staphylococcus pseudintermedius SIG members are animal pathogens and rare causes of human infection. Accurate identification of S. pseudintermedius has important implications for interpretation of antimicrobial susceptibility testing data and may be important for other members of the group. Therefore, we sought to evaluate the performance of five commercially available identification platforms with 21 S. delphini isolates obtained from a variety of animal and geographic sources. Here, we show that automated biochemical platforms were unable to identify S. delphini to the species level, a function of its omission from their databases, but could identify isolates to the SIG level with various degrees of success. However, all automated systems misidentified at least one isolate as Staphylococcus aureus One matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) system was able to identify S. delphini to the species level, suggesting that MALDI-TOF MS is the best option for distinguishing members of the SIG. With the exception of S. pseudintermedius, it is unclear if other SIG members should be routinely identified to the species level; however, as our understanding of their role in animal and human diseases increases, it may be necessary and important to do so.
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Azam AH, Kadoi K, Miyanaga K, Usui M, Tamura Y, Cui L, Tanji Y. Analysis host-recognition mechanism of staphylococcal kayvirus ɸSA039 reveals a novel strategy that protects Staphylococcus aureus against infection by Staphylococcus pseudintermedius Siphoviridae phages. Appl Microbiol Biotechnol 2019; 103:6809-6823. [PMID: 31236618 DOI: 10.1007/s00253-019-09940-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 05/13/2019] [Accepted: 05/18/2019] [Indexed: 12/13/2022]
Abstract
Following the emergence of antibiotic-resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA) and methicillin-resistant Staphylococcus pseudintermedius (MRSP), phage therapy has attracted significant attention as an alternative to antibiotic treatment. Bacteriophages belonging to kayvirus (previously known as Twort-like phages) have broad host range and are strictly lytic in Staphylococcus spp. Previous work revealed that kayvirus ɸSA039 has a host-recognition mechanism distinct from those of other known kayviruses: most of kayviruses use the backbone of wall teichoic acid (WTA) as their receptor; by contrast, ɸSA039 uses the β-N-acetylglucosamine (β-GlcNAc) residue in WTA. In this study, we found that ɸSA039 could switch its receptor to be able to infect S. aureus lacking the β-GlcNAc residue by acquiring a spontaneous mutation in open reading frame (ORF) 100 and ORF102. Moreover, ɸSA039 could infect S. pseudintermedius, which has a different WTA structure than S. aureus. By comparison, with newly isolated S. pseudintermedius-specific phage (SP phages), we determined that glycosylation in WTA of S. pseudintermedius is essential for adsorption of SP phages, but not ɸSA039. Finally, we describe a novel strategy of S. aureus which protects the bacteria from infection of SP phages. Notably, glycosylation of ribitol phosphate (RboP) WTA by TarM or/and TarS prevents infection of S. aureus by SP phages. These findings could help to establish a new strategy for the treatment of S. aureus and S. pseudintermedius infection, as well as provide valuable insights into the biology of phage-host interactions.
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Affiliation(s)
- Aa Haeruman Azam
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan.,Division of Bacteriology, Department of Infection and Immunity, Faculty of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi, 329-0498, Japan
| | - Kenji Kadoi
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan
| | - Kazuhiko Miyanaga
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan
| | - Masaru Usui
- Graduate School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyoudaimidorimachi, Ebetsu-shi, Hokkaido, 069-0836, Japan
| | - Yutaka Tamura
- Graduate School of Veterinary Medicine, Rakuno Gakuen University, 582 Bunkyoudaimidorimachi, Ebetsu-shi, Hokkaido, 069-0836, Japan
| | - Longzhu Cui
- Division of Bacteriology, Department of Infection and Immunity, Faculty of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-shi, Tochigi, 329-0498, Japan
| | - Yasunori Tanji
- School of Life Science and Technology, Tokyo Institute of Technology, 4259 J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan.
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Tsuchido Y, Horiuchi R, Hashimoto T, Ishihara K, Kanzawa N, Hayashita T. Rapid and Selective Discrimination of Gram-Positive and Gram-Negative Bacteria by Boronic Acid-Modified Poly(amidoamine) Dendrimer. Anal Chem 2019; 91:3929-3935. [PMID: 30652471 DOI: 10.1021/acs.analchem.8b04870] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
There is an urgent need to develop a rapid and selective method for the detection of bacteria because delayed diagnosis and the overuse of antibiotics have triggered drug resistance in bacteria. To this end, we prepared boronic acid-modified poly(amidoamine) generation 4 (B-PAMAM(G4)) dendrimer as cross-linking molecules that form aggregates with bacteria. Within 5 min of adding B-PAMAM(G4) dendrimer solution to a bacterial suspension, large aggregates were observed. Interestingly, the aggregate formation with various bacteria was pH-dependent. In basic pH, both Gram-positive and Gram-negative bacteria formed aggregates, but in neutral pH, only Gram-positive bacteria formed aggregates. We revealed that this bacteria-selective aggregation involved the bacterial surface recognition of the phenylboronic acid moiety of B-PAMAM(G4) dendrimer. In addition, we demonstrated that the spherical structure of B-PAMAM(G4) was one of the important factors for the formation of large aggregates. The aggregation was also observed in the presence of ≤10 mM fructose. B-PAMAM(G4) dendrimer is expected to be a powerful tool for the rapid and selective discrimination between Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Yuji Tsuchido
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Ryosuke Horiuchi
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Takeshi Hashimoto
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Kanako Ishihara
- Cooperative Department of Veterinary Medicine, Faculty of Agriculture , Tokyo University of Agriculture and Technology , 3-5-8 Saiwai-cho , Fuchu-shi , Tokyo 183-8509 , Japan
| | - Nobuyuki Kanzawa
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
| | - Takashi Hayashita
- Department of Materials and Life Sciences, Faculty of Science and Technology , Sophia University , 7-1 Kioi-cho , Chiyoda-ku , Tokyo 102-8554 , Japan
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First reported human isolation of Staphylococcus delphini. Diagn Microbiol Infect Dis 2019; 94:274-276. [PMID: 30955895 DOI: 10.1016/j.diagmicrobio.2019.01.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 01/06/2019] [Accepted: 01/16/2019] [Indexed: 11/20/2022]
Abstract
The Staphylococcus intermedius group is a collection of coagulase-positive staphylococci composed of 5 members, including Staphylococcus pseudintermedius, a zoonotic pathogen often associated with exposure to dogs, and Staphylococcus delphini, which has not previously been recovered from humans. Here, we describe the first human case of S. delphini infection.
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Bergot M, Martins-Simoes P, Kilian H, Châtre P, Worthing KA, Norris JM, Madec JY, Laurent F, Haenni M. Evolution of the Population Structure of Staphylococcus pseudintermedius in France. Front Microbiol 2018; 9:3055. [PMID: 30619143 PMCID: PMC6300469 DOI: 10.3389/fmicb.2018.03055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 11/27/2018] [Indexed: 01/17/2023] Open
Abstract
Staphylococcus pseudintermedius is a colonizer as well as an important pathogen of dogs where it is responsible for skin, ear and post-operative infections. The emergence of methicillin-resistant S. pseudintermedius (MRSP) in the early 2000s, which were additionally resistant to most veterinary-licensed antibiotics, drew specific attention to these pathogens due to the limitations created in veterinary therapeutic options. Multiple studies showed that the sequence type (ST)71 was the most frequently identified clone in Europe. A few years ago, several publications have suggested a decline of the ST71 clone and the emergence of the ST258 lineage in Northern Europe. In this study, we show that ST71 is also decreasing over time in France and that the non-ST71 population is highly heterogeneous. Globally, the non-ST71 clones are more susceptible to antibiotics, which might be good news for veterinarians. Two other lineages, ST258 and ST496, seem to be successful in France. These isolates, as well as representatives of the ST71 clone, underwent whole-genome sequence. This study shows that the ST71 and ST496 clusters are highly homogenous while the ST258 cluster is more diverse. Each ST possesses a specific pattern of resistance and virulence genes. The reasons for the apparent and simultaneous success of the ST258 and ST496 clones remain unclear. But the emergence of the ST496 clone will require monitoring given its multi-resistant genotype and threat to canine health.
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Affiliation(s)
- Marine Bergot
- Centre International de Recherche en Infectiologie (CIRI), Equipe Pathogénie des Staphylocoques, Faculté de Médecine Laennec, Lyon, France
| | - Patricia Martins-Simoes
- Centre International de Recherche en Infectiologie (CIRI), Equipe Pathogénie des Staphylocoques, Faculté de Médecine Laennec, Lyon, France.,Institut des Agents Infectieux - Centre de Biologie Nord, Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Hélène Kilian
- Unité Antibiorésistance et Virulence Bactériennes, Université de Lyon - Agence Nationale de Sécurité Sanitaire (Anses), Lyon, France
| | - Pierre Châtre
- Unité Antibiorésistance et Virulence Bactériennes, Université de Lyon - Agence Nationale de Sécurité Sanitaire (Anses), Lyon, France
| | - Kate A Worthing
- Sydney School of Veterinary Science, University of Sydney, Camden, NSW, Australia.,Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Parkville, VIC, Australia
| | - Jacqueline M Norris
- Sydney School of Veterinary Science, University of Sydney, Camden, NSW, Australia
| | - Jean-Yves Madec
- Institut des Agents Infectieux - Centre de Biologie Nord, Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Frédéric Laurent
- Centre International de Recherche en Infectiologie (CIRI), Equipe Pathogénie des Staphylocoques, Faculté de Médecine Laennec, Lyon, France.,Institut des Agents Infectieux - Centre de Biologie Nord, Centre National de Référence des Staphylocoques, Hospices Civils de Lyon, Lyon, France
| | - Marisa Haenni
- Unité Antibiorésistance et Virulence Bactériennes, Université de Lyon - Agence Nationale de Sécurité Sanitaire (Anses), Lyon, France
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Indoor Air Quality and Potential Health Risk Impacts of Exposure to Antibiotic Resistant Bacteria in an Office Rooms in Southern Poland. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15112604. [PMID: 30469413 PMCID: PMC6267043 DOI: 10.3390/ijerph15112604] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/08/2018] [Accepted: 11/21/2018] [Indexed: 01/06/2023]
Abstract
The aims of this article are to characterize: the quantity of culturable bacterial aerosol (QCBA) and the quality of culturable bacterial aerosol (QlCBA) in an office building in Southern Poland during the spring. The average concentration of culturable bacterial aerosol (CCBA) in this building ranged from 424 CFU m-3 to 821 CFU m-3, below Polish proposals for threshold limit values. Size distributions were unimodal, with a peak of particle bacterial aerodynamic diameters less than 3.3 μm, increasing potentially adverse health effects due to their inhalation. The spring office exposure dose (SPED) of bacterial aerosol was estimated. The highest value of SPED was in April (218 CFU kg-1), whereas the lowest was in June (113 CFU kg-1). Analysis was undertaken to determine the antibiotic resistance of isolated strains and their ability to form biofilms, which may facilitate the spread of antibiotic resistance genes. In the course of the study, it was found that Staphylococcus xylosus had the greatest ability to form biofilms, while the strains with the highest antibiotic resistance were Micrococcus luteus D and Macrococcus equipercicus. Given that mainly antibiotic-sensitive bacteria from bioaerosol were isolated, which transfers resistance genes to their plasmids, this shows the need for increased monitoring of indoor air quality in workplaces.
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High Occurrence of Staphylococcus aureus Isolated from Fitness Equipment from Selected Gymnasiums. JOURNAL OF ENVIRONMENTAL AND PUBLIC HEALTH 2018; 2018:4592830. [PMID: 30245728 PMCID: PMC6136567 DOI: 10.1155/2018/4592830] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/17/2018] [Accepted: 08/02/2018] [Indexed: 11/18/2022]
Abstract
Introduction Staphylococcus aureus is a leading cause of cutaneous bacterial infection involving community. Methods In this study, a total of 42 swab samples were collected from the surface of various fitness equipment such as back machines, exercise mats, dip stations, dumbbells, and treadmills. Identification of the bacterial isolates was conducted using biochemical tests and further analysed molecularly using the PCR method targeting nuc gene (270 bp). The nuc gene encodes for the thermonuclease enzyme, a virulent factor of S. aureus. Results The findings showed 31 out of 42 swab samples (73.81%) were positive with S. aureus. Conclusion This study showed that gymnasium equipment is a potential reservoir for S. aureus and might play an important role in transmitting the pathogen to humans. Objective This study was undertaken to assess the presence of S. aureus on the surface of fitness equipment from selected gymnasiums in Kuching and Kota Samarahan, Sarawak (Malaysia).
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Haenni M, Châtre P, Dupieux-Chabert C, Métayer V, Bes M, Madec JY, Laurent F. Molecular Epidemiology of Methicillin-Resistant Staphylococcus aureus in Horses, Cats, and Dogs Over a 5-Year Period in France. Front Microbiol 2017; 8:2493. [PMID: 29326664 PMCID: PMC5733339 DOI: 10.3389/fmicb.2017.02493] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/30/2017] [Indexed: 11/13/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) has been reported as a worldwide pathogen in humans and animals including companion animals, i.e., cats, dogs, and horses. France lacked a comprehensive nationwide study describing the molecular features of MRSA circulating among companion animals over a large period of time. Here is reported the characterization of 130 non-duplicate clinical MRSA isolates collected from those three animal species from 2010 to 2015 through the French national Resapath network. Characterization of isolates was performed using phenotypic (antimicrobial susceptibility tests) and molecular (DNA arrays, spa-typing) methods. A horse-specific epidemiology was observed in France with the large dissemination of a unique clone, the CC398 clone harboring a Staphylococcal chromosomal cassette mec (SCCmec) type IV and spa-type t011. It was even the unique clone collected in 2015 whereas the clone CC8 USA500 (SCCmec type IV), classically described in horses, was present until 2014. Contrarily, cats and dogs were mainly infected by human-related MRSA isolates, i.e., clones usually reported in human infections, thus mirroring the human epidemiology in hospitals in France. Isolates belonging to the CC398 clone (SCCmec type IV or V) were also identified in 21.4% of dogs' and 26.5% of cats' MRSA isolates. In order to differentiate human-related from CC398 MRSA, tetracycline-resistance [or tet(M) detection] could be useful since this resistance is scarce in human-related strains but constant in CC398 MRSA isolates. In all, our data give a nationwide epidemiological picture of MRSA in companion animals over a 5-year period in France, adding further epidemiological information on the contribution of those animal species to a major public health issue. Considering the wide dissemination of CC398 MRSA isolates and the fact that 11/64 (17.2%) of them presented the Immune Evasion Cluster which enhances CC398 capacities to colonize humans, a specific attention should be paid in the coming years to determine the risk associated to the transmission in people in frequent contacts with companion animals. Our data also show that the prevalence of MRSA has likely decreased in cats, dogs, and horses between 2012 and 2015 in France. This trend should be monitored in the years to come.
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Affiliation(s)
- Marisa Haenni
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Pierre Châtre
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Céline Dupieux-Chabert
- Bacteriology Department, Institut for Infectious Agents, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France.,INSERM U1111, CNRS, International Center for Infectiology Research, UMR5308, École Normale Supérieure de Lyon, Claude Bernard University Lyon 1, Lyon, France
| | - Véronique Métayer
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Michèle Bes
- Bacteriology Department, Institut for Infectious Agents, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France.,INSERM U1111, CNRS, International Center for Infectiology Research, UMR5308, École Normale Supérieure de Lyon, Claude Bernard University Lyon 1, Lyon, France
| | - Jean-Yves Madec
- Unité Antibiorésistance et Virulence Bactériennes, French Agency for Food, Environmental and Occupational Health Safety, Claude Bernard University Lyon 1, Lyon, France
| | - Frédéric Laurent
- Bacteriology Department, Institut for Infectious Agents, French National Reference Centre for Staphylococci, Hospices Civils de Lyon, Lyon, France.,INSERM U1111, CNRS, International Center for Infectiology Research, UMR5308, École Normale Supérieure de Lyon, Claude Bernard University Lyon 1, Lyon, France.,Institut for Pharmaceutical and Biological Sciences of Lyon, Lyon, France
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15
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Haubert L, Kroning IS, Iglesias MA, da Silva WP. First report of the Staphylococcus aureus isolate from subclinical bovine mastitis in the South of Brazil harboring resistance gene dfrG and transposon family Tn 916-1545. Microb Pathog 2017; 113:242-247. [DOI: 10.1016/j.micpath.2017.10.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 10/10/2017] [Accepted: 10/13/2017] [Indexed: 01/03/2023]
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16
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Insight into the Genome of Staphylococcus xylosus, a Ubiquitous Species Well Adapted to Meat Products. Microorganisms 2017; 5:microorganisms5030052. [PMID: 28850086 PMCID: PMC5620643 DOI: 10.3390/microorganisms5030052] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 08/21/2017] [Accepted: 08/25/2017] [Indexed: 01/23/2023] Open
Abstract
Staphylococcus xylosus belongs to the vast group of coagulase-negative staphylococci. It is frequently isolated from meat products, either fermented or salted and dried, and is commonly used as starter cultures in sausage manufacturing. Analysis of the S. xylosus genome together with expression in situ in a meat model revealed that this bacterium is well adapted to meat substrates, being able to use diverse substrates as sources of carbon and energy and different sources of nitrogen. It is well-equipped with genes involved in osmotic, oxidative/nitrosative, and acidic stress responses. It is responsible for the development of the typical colour of cured meat products via its nitrate reductase activity. It contributes to sensorial properties, mainly by the the catabolism of pyruvate and amino acids resulting in odorous compounds and by the limiting of the oxidation of fatty acids, thereby avoiding rancidity.
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Dmitrenko OA, Balbutskaya AA, Skvortsov VN. Ecological features, pathogenic properties, and role of Staphylococcus intermedius group representatives in animal and human infectious pathology. MOLECULAR GENETICS MICROBIOLOGY AND VIROLOGY 2017. [DOI: 10.3103/s0891416816030034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Coagulase gene polymorphism of Staphylococcus aureus isolates: A study on dairy food products and other foods in Tehran, Iran. FOOD SCIENCE AND HUMAN WELLNESS 2016. [DOI: 10.1016/j.fshw.2016.09.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Viau R, Hujer AM, Hujer KM, Bonomo RA, Jump RLP. Are Staphylococcus intermedius Infections in Humans Cases of Mistaken Identity? A Case Series and Literature Review. Open Forum Infect Dis 2015; 2:ofv110. [PMID: 26509181 PMCID: PMC4536328 DOI: 10.1093/ofid/ofv110] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 07/13/2015] [Indexed: 11/13/2022] Open
Abstract
Staphylococcus intermedius and Staphylococcus pseudintermedius are difficult to distinguish using conventional microbiological methods. Molecular diagnostic tools change our understanding of the epidemiology of these 2 organisms. In this study, we present (1) a detailed review of the current literature on molecular diagnostics and (2) a case series in which misidentification was proven in 1 case. We conclude that S pseudintermedius is a more common human pathogen than previously recognized.
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Affiliation(s)
- Roberto Viau
- Division of Infectious Diseases and HIV Medicine ; Departments of Medicine ; Division of Infectious Diseases, MetroHealth Medical Center, Cleveland, Ohio
| | - Andrea M Hujer
- Departments of Medicine ; Research Service , Cleveland , Ohio
| | | | - Robert A Bonomo
- Division of Infectious Diseases and HIV Medicine ; Departments of Medicine ; Pathology ; Pharmacology ; Molecular Biology and Microbiology ; Biochemistry , Case Western Reserve University School of Medicine , Cleveland, Ohio ; Research Service , Cleveland , Ohio ; Geriatric Research Education and Clinical Center , Cleveland, Ohio ; Medical Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio
| | - Robin L P Jump
- Division of Infectious Diseases and HIV Medicine ; Departments of Medicine ; Research Service , Cleveland , Ohio ; Geriatric Research Education and Clinical Center , Cleveland, Ohio ; Medical Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio
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20
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Akbari S, Oshaghi MA, Hashemi-Aghdam SS, Hajikhani S, Oshaghi G, Shirazi MH. Aerobic Bacterial Community of American Cockroach Periplaneta americana,a Step toward Finding Suitable Paratransgenesis Candidates. J Arthropod Borne Dis 2015; 9:35-48. [PMID: 26114142 PMCID: PMC4478416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 04/16/2014] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Cockroaches mechanically spread pathogenic agents, however, little is known about their gut microbiota. Identification of midgut microbial community helps targeting novel biological control strategies such as paratransgenesis. Here the bacterial microbiota of Periplaneta americana midgut, were identified and evaluated for finding proper paratransgenesis candidate. METHODS Midgut of specimens were dissected and cultivated in different media. The bacterial isolates were then identified using the phenotypic and 16S-rRNA sequencing methods. RESULTS The analytical profile index (API) kit showed presence of 11 bacterial species including: Escherichia coli, Shigella flexineri, Citrobacter freundii, E. vulneris, Enterobacter cloacae, Yersinia pseudotuberculosis, Y. intermedia, Leclericia adecarboxylata, Klebsiella oxytoca, K. planticola, and Rahnella aquatilis in the cockroach midguts. The first three species are potentially symbiotic whereas others are transient. The conventional plating method revealed presence of only four isolates of Salmonella, E. coli, and Proteus which in three cases mismatched with API and 16S-rRNA genotyping. The API correctly identified the four isolates as Shigella flexneri, Citrobacter freundii, and E. coli (n= 2). 16S-rRNA sequence analysis confirmed the API results; however the C. freundii sequence was identical with C. murliniae indicating lack of genetic variation in the gene between these two closely related species. CONCLUSION A low number of potentially symbiotic bacteria were found in the American cockroach midguts. Among them Enterobacter cloacae is a potential candidate for paratransgenesis approach whereas other bacteria are pathogens and are not useful for the approach. Data analysis showed that identification levels increase from the conventional to API and to genotyping respectively.
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Affiliation(s)
- Sanaz Akbari
- Department of Microbiology, Islamic Azad University, Damghan Branch, Damghan, Iran
| | - Mohammad Ali Oshaghi
- Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Sara Hajikhani
- Department of Pathology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ghazaleh Oshaghi
- Department of Nutrition, National Nutrition and Food Technology Research Institute (NNFTRI), Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Hasan Shirazi
- Department of Pathology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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Vermassen A, de la Foye A, Loux V, Talon R, Leroy S. Transcriptomic analysis of Staphylococcus xylosus in the presence of nitrate and nitrite in meat reveals its response to nitrosative stress. Front Microbiol 2014; 5:691. [PMID: 25566208 PMCID: PMC4266091 DOI: 10.3389/fmicb.2014.00691] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 11/22/2014] [Indexed: 12/20/2022] Open
Abstract
Staphylococcus xylosus is one of the major starter cultures used for meat fermentation because of its crucial role in the reduction of nitrate to nitrite which contributes to color and flavor development. Despite longstanding use of these additives, their impact on the physiology of S. xylosus has not yet been explored. We present the first in situ global gene expression profile of S. xylosus in meat supplemented with nitrate and nitrite at the levels used in the meat industry. More than 600 genes of S. xylosus were differentially expressed at 24 or 72 h of incubation. They represent more than 20% of the total genes and let us to suppose that addition of nitrate and nitrite to meat leads to a global change in gene expression. This profile revealed that S. xylosus is subject to nitrosative stress caused by reactive nitrogen species (RNS) generated from nitrate and nitrite. To overcome this stress, S. xylosus has developed several oxidative stress resistance mechanisms, such as modulation of the expression of several genes involved in iron homeostasis and in antioxidant defense. Most of which belong to the Fur and PerR regulons, respectively. S. xylosus has also counteracted this stress by developing DNA and protein repair. Furthermore, it has adapted its metabolic response—carbon and nitrogen metabolism, energy production and cell wall biogenesis—to the alterations produced by nitrosative stress.
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Affiliation(s)
- Aurore Vermassen
- Institut National de la Recherche Agronomique, UR454 Microbiologie Saint-Genès-Champanelle, France
| | - Anne de la Foye
- Institut National de la Recherche Agronomique, Plateforme d'Exploration du Métabolisme Saint-Genès-Champanelle, France
| | - Valentin Loux
- Institut National de la Recherche Agronomique, UR1077 Mathématique, Informatique et Génome Jouy-en-Josas, France
| | - Régine Talon
- Institut National de la Recherche Agronomique, UR454 Microbiologie Saint-Genès-Champanelle, France
| | - Sabine Leroy
- Institut National de la Recherche Agronomique, UR454 Microbiologie Saint-Genès-Champanelle, France
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22
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Bukowski M, Polakowska K, Ilczyszyn WM, Sitarska A, Nytko K, Kosecka M, Miedzobrodzki J, Dubin A, Wladyka B. Species determination within Staphylococcus genus by extended PCR-restriction fragment length polymorphism of saoC gene. FEMS Microbiol Lett 2014; 362:1-11. [PMID: 25790489 DOI: 10.1093/femsle/fnu007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Genetic methods based on PCR-restriction fragment length polymorphism (RFLP) are widely used for microbial species determination. In this study, we present the application of saoC gene as an effective tool for species determination and within-species diversity analysis for Staphylococcus genus. The unique sequence diversity of saoC allows us to apply four restriction enzymes to obtain RFLP patterns, which appear highly distinctive even among closely related species as well as atypical isolates of environmental origin. Such patterns were successfully obtained for 26 species belonging to Staphylococcus genus. What is more, tracing polymorphisms detected by different restriction enzymes allowed for basic phylogeny analysis for Staphylococcus aureus, which is potentially applicable for other staphylococcal species.
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Affiliation(s)
- Michal Bukowski
- Department of Analytical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Klaudia Polakowska
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Weronika M Ilczyszyn
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Agnieszka Sitarska
- Department of Analytical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Kinga Nytko
- Department of Analytical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Maja Kosecka
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Jacek Miedzobrodzki
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Adam Dubin
- Department of Analytical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
| | - Benedykt Wladyka
- Department of Analytical Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland Malopolska Centre of Biotechnology, Jagiellonian University, 7 Gronostajowa St, 30-387 Krakow, Poland
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The ecological importance of the Staphylococcus sciuri species group as a reservoir for resistance and virulence genes. Vet Microbiol 2014; 171:342-56. [DOI: 10.1016/j.vetmic.2014.02.005] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/30/2014] [Accepted: 02/01/2014] [Indexed: 11/18/2022]
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Fusco V, Quero GM. Culture-Dependent and Culture-Independent Nucleic-Acid-Based Methods Used in the Microbial Safety Assessment of Milk and Dairy Products. Compr Rev Food Sci Food Saf 2014; 13:493-537. [DOI: 10.1111/1541-4337.12074] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/08/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Vincenzina Fusco
- Nal. Research Council of Italy; Inst. of Sciences of Food Production (CNR-ISPA); Bari Italy
| | - Grazia Marina Quero
- Nal. Research Council of Italy; Inst. of Sciences of Food Production (CNR-ISPA); Bari Italy
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Haenni M, de Moraes NA, Châtre P, Médaille C, Moodley A, Madec JY. Characterisation of clinical canine meticillin-resistant and meticillin-susceptible Staphylococcus pseudintermedius in France. J Glob Antimicrob Resist 2014; 2:119-123. [PMID: 27873590 DOI: 10.1016/j.jgar.2014.02.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 02/04/2014] [Accepted: 02/24/2014] [Indexed: 10/25/2022] Open
Abstract
Staphylococcus pseudintermedius is a frequent pathogen in dogs. The emergence of meticillin-resistant S. pseudintermedius (MRSP), which is concomitantly resistant to nearly all veterinary licensed antibiotics used for systemic treatment in dogs, is a major problem for veterinarians. In France, 16.9% (41/243) of the S. pseudintermedius collected in 2010 were MRSP. They mainly belonged to the multiresistant MLST sequence type ST71, spa type t02, SCCmec type II-III (ST71-t02-II-III) European clone. Moreover, we also report the emergence of multiresistant meticillin-susceptible S. pseudintermedius isolates presenting atypical and/or new spa types. This study highlights the need for surveillance, optimised treatment guidelines and new therapeutic alternatives.
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Affiliation(s)
- Marisa Haenni
- Agence Nationale de Sécurité Sanitaire (Anses), Unité Antibiorésistance et Virulence Bactériennes, Lyon, France.
| | - Natasha Alves de Moraes
- Agence Nationale de Sécurité Sanitaire (Anses), Unité Antibiorésistance et Virulence Bactériennes, Lyon, France
| | - Pierre Châtre
- Agence Nationale de Sécurité Sanitaire (Anses), Unité Antibiorésistance et Virulence Bactériennes, Lyon, France
| | | | - Arshnee Moodley
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jean-Yves Madec
- Agence Nationale de Sécurité Sanitaire (Anses), Unité Antibiorésistance et Virulence Bactériennes, Lyon, France
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Filleron A, Simon M, Hantova S, Jacquot A, Cambonie G, Marchandin H, Jumas-Bilak E. tuf-PCR-temporal temperature gradient gel electrophoresis for molecular detection and identification of staphylococci: Application to breast milk and neonate gut microbiota. J Microbiol Methods 2014; 98:67-75. [DOI: 10.1016/j.mimet.2013.12.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 12/29/2013] [Accepted: 12/30/2013] [Indexed: 11/30/2022]
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27
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Geraghty L, Booth M, Rowan N, Fogarty A. Investigations on the efficacy of routinely used phenotypic methods compared to genotypic approaches for the identification of staphylococcal species isolated from companion animals in Irish veterinary hospitals. Ir Vet J 2013; 66:7. [PMID: 23635328 PMCID: PMC3649918 DOI: 10.1186/2046-0481-66-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2013] [Accepted: 04/02/2013] [Indexed: 11/17/2022] Open
Abstract
Background Identification of Staphylococci to species level in veterinary microbiology is important to inform therapeutic intervention and management. We report on the efficacy of three routinely used commercial phenotypic methods for staphylococcal species identification, namely API Staph 32 (bioMérieux), RapID (Remel) and Staph-Zym (Rosco Diagnostica) compared to genotyping as a reference method to identify 52 staphylococcal clinical isolates (23 coagulase positive; 29 coagulase negative) from companion animals in Irish veterinary hospitals. Results Genotyping of a 412 bp fragment of the staphylococcal tuf gene and coagulase testing were carried out on all 52 veterinary samples along with 7 reference strains. In addition, genotyping of the staphylococcal rpoB gene, as well as PCR-RFLP of the pta gene, were performed to definitively identify members of the Staphylococcus intermedius group (SIG). The API Staph 32 correctly identified all S. aureus isolates (11/11), 83% (10/12) of the SIG species, and 66% (19/29) of the coagulase negative species. RapID and Staph-Zym correctly identified 61% (14/23) and 0% (0/23) respectively of the coagulase-positives, and 10% (3/29) and 3% (1/29) respectively of the coagulase-negative species. Conclusions Commercially available phenotypic species identification tests are inadequate for the correct identification of both coagulase negative and coagulase positive staphylococcal species from companion animals. Genotyping using the tuf gene sequence is superior to phenotyping for identification of staphylococcal species of animal origin. However, use of PCR-RFLP of pta gene or rpoB sequencing is recommended as a confirmatory method for discriminating between SIG isolates.
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Affiliation(s)
- Lisa Geraghty
- Biosciences Research Institute, Athlone Institute of Technology, Dublin Rd., Athlone, Co. Westmeath, Ireland ; Department of Life and Physical Science, School of Science, Athlone Institute of Technology, Dublin Rd., Athlone, Ireland
| | - Mary Booth
- Biosciences Research Institute, Athlone Institute of Technology, Dublin Rd., Athlone, Co. Westmeath, Ireland ; Department of Life and Physical Science, School of Science, Athlone Institute of Technology, Dublin Rd., Athlone, Ireland
| | - Neil Rowan
- Biosciences Research Institute, Athlone Institute of Technology, Dublin Rd., Athlone, Co. Westmeath, Ireland
| | - Andrew Fogarty
- Biosciences Research Institute, Athlone Institute of Technology, Dublin Rd., Athlone, Co. Westmeath, Ireland ; Department of Life and Physical Science, School of Science, Athlone Institute of Technology, Dublin Rd., Athlone, Ireland
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Capparelli R, De Chiara F, Nocerino N, Montella RC, Iannaccone M, Fulgione A, Romanelli A, Avitabile C, Blaiotta G, Capuano F. New perspectives for natural antimicrobial peptides: application as antinflammatory drugs in a murine model. BMC Immunol 2012; 13:61. [PMID: 23157568 PMCID: PMC3526545 DOI: 10.1186/1471-2172-13-61] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Accepted: 11/12/2012] [Indexed: 01/28/2023] Open
Abstract
Background Antimicrobial peptides (AMPs) are an ancient group of defense molecules. AMPs are widely distributed in nature (being present in mammals, birds, amphibians, insects, plants, and microorganisms). They display bactericidal as well as immunomodulatory properties. The aim of this study was to investigate the antimicrobial and anti-inflammatory activities of a combination of two AMPs (temporin B and the royal jellein I) against Staphylococcus epidermidis. Results The temporin B (TB-KK) and the royal jelleins I, II, III chemically modified at the C terminal (RJI-C, RJII-C, RJIII-C), were tested for their activity against 10 different Staphylococcus epidermidis strains, alone and in combination. Of the three royal jelleins, RJI-C showed the highest activity. Moreover, the combination of RJI-C and TB-KK (MIX) displayed synergistic activity. In vitro, the MIX displayed low hemolytic activity, no NO2- production and the ability to curb the synthesis of the pro-inflammatory cytokines TNF-α and IFN-γ to the same extent as acetylsalicylic acid. In vivo, the MIX sterilized mice infected with Staphylococcus epidermidis in eleven days and inhibited the expression of genes encoding the prostaglandin-endoperoxide synthase 2 (COX-2) and CD64, two important parameters of inflammation. Conclusion The study shows that the MIX – a combination of two naturally occurring peptides - displays both antimicrobial and anti-inflammatory activities.
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Affiliation(s)
- Rosanna Capparelli
- Faculty of Biotechnology, University of Naples Federico II, Naples 80134, Italy.
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Production of 2-aminophenoxazin-3-one by Staphylococcus aureus causes false-positive results in β-galactosidase assays. J Clin Microbiol 2012; 50:3780-2. [PMID: 22972831 DOI: 10.1128/jcm.02299-12] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Staphylococcus aureus can be distinguished from similar coagulase-positive staphylococci by its absence of β-galactosidase activity. This is commonly tested using o-nitrophenyl-β-D-galactopyranoside (ONPG) as the substrate. Unexpectedly, 111 and 58 of 123 isolates displayed apparent β-galactosidase activity in the ONPG assay and on the Vitek 2 system, respectively. Compositional analysis showed that the yellow coloration of the positive ONPG assay resulted from production of 2-aminophenoxazin-3-one. Alternative β-galactosidase substrates like X-Gal (5-bromo-4-chloro-3-indolyl-β-D-galactopyranoside) should be used for testing staphylococci.
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Bannoehr J, Guardabassi L. Staphylococcus pseudintermedius in the dog: taxonomy, diagnostics, ecology, epidemiology and pathogenicity. Vet Dermatol 2012; 23:253-66, e51-2. [PMID: 22515504 DOI: 10.1111/j.1365-3164.2012.01046.x] [Citation(s) in RCA: 229] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The dog is the natural host of Staphylococcus pseudintermedius. Many research efforts are currently being undertaken to expand our knowledge and understanding of this important canine commensal and opportunistic pathogen. The objective of this review is to summarize the current knowledge of the species, including the latest research outcomes, with emphasis on taxonomy, diagnostics, ecology, epidemiology and pathogenicity. Despite the important taxonomic changes that have occurred over the past few years, the risk of misidentification in canine specimens is low and does not have serious consequences for clinical practice. Staphylococcus pseudintermedius carriage in the dog is more frequent and genetically heterogeneous compared with that of Staphylococcus aureus in man. It appears that these staphylococcal species have evolved separately through adaptation to their respective natural hosts and differ with regard to various aspects concerning ecology, population structure and evolution of antibiotic resistance. Further understanding of the ecology and epidemiology of S. pseudintermedius is hampered by the lack of a standard method for rapid and discriminatory typing and by the limited data available on longitudinal carriage and population structure of meticillin-susceptible strains. With regard to pathogenicity, it is only now that we are starting to explore the virulence potential of S. pseudintermedius based on genomic and proteomic approaches, and more research is needed to assess the importance of individual virulence factors and the possible existence of hypervirulent strains.
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Affiliation(s)
- Jeanette Bannoehr
- Division of Clinical Dermatology, Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Berne, Länggassstraße 128, CH-3012 Berne, Switzerland.
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31
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Ben Zakour NL, Beatson SA, van den Broek AHM, Thoday KL, Fitzgerald JR. Comparative genomics of the Staphylococcus intermedius group of animal pathogens. Front Cell Infect Microbiol 2012; 2:44. [PMID: 22919635 PMCID: PMC3417630 DOI: 10.3389/fcimb.2012.00044] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Accepted: 03/15/2012] [Indexed: 11/29/2022] Open
Abstract
The Staphylococcus intermedius group consists of three closely related coagulase-positive bacterial species including S. intermedius, Staphylococcus pseudintermedius, and Staphylococcus delphini. S. pseudintermedius is a major skin pathogen of dogs, which occasionally causes severe zoonotic infections of humans. S. delphini has been isolated from an array of different animals including horses, mink, and pigeons, whereas S. intermedius has been isolated only from pigeons to date. Here we provide a detailed analysis of the S. pseudintermedius whole genome sequence in comparison to high quality draft S. intermedius and S. delphini genomes, and to other sequenced staphylococcal species. The core genome of the SIG was highly conserved with average nucleotide identity (ANI) between the three species of 93.61%, which is very close to the threshold of species delineation (95% ANI), highlighting the close-relatedness of the SIG species. However, considerable variation was identified in the content of mobile genetic elements, cell wall-associated proteins, and iron and sugar transporters, reflecting the distinct ecological niches inhabited. Of note, S. pseudintermedius ED99 contained a clustered regularly interspaced short palindromic repeat locus of the Nmeni subtype and S. intermedius contained both Nmeni and Mtube subtypes. In contrast to S. intermedius and S. delphini and most other staphylococci examined to date, S. pseudintermedius contained at least nine predicted reverse transcriptase Group II introns. Furthermore, S. pseudintermedius ED99 encoded several transposons which were largely responsible for its multi-resistant phenotype. Overall, the study highlights extensive differences in accessory genome content between closely related staphylococcal species inhabiting distinct host niches, providing new avenues for research into pathogenesis and bacterial host-adaptation.
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Affiliation(s)
- Nouri L Ben Zakour
- The Roslin Institute and Edinburgh Infectious Diseases, The University of Edinburgh Edinburgh, UK
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32
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Gaupp R, Ledala N, Somerville GA. Staphylococcal response to oxidative stress. Front Cell Infect Microbiol 2012; 2:33. [PMID: 22919625 PMCID: PMC3417528 DOI: 10.3389/fcimb.2012.00033] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 02/29/2012] [Indexed: 12/23/2022] Open
Abstract
Staphylococci are a versatile genus of bacteria that are capable of causing acute and chronic infections in diverse host species. The success of staphylococci as pathogens is due in part to their ability to mitigate endogenous and exogenous oxidative and nitrosative stress. Endogenous oxidative stress is a consequence of life in an aerobic environment; whereas, exogenous oxidative and nitrosative stress are often due to the bacteria's interaction with host immune systems. To overcome the deleterious effects of oxidative and nitrosative stress, staphylococci have evolved protection, detoxification, and repair mechanisms that are controlled by a network of regulators. In this review, we summarize the cellular targets of oxidative stress, the mechanisms by which staphylococci sense oxidative stress and damage, oxidative stress protection and repair mechanisms, and regulation of the oxidative stress response. When possible, special attention is given to how the oxidative stress defense mechanisms help staphylococci control oxidative stress in the host.
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Affiliation(s)
- Rosmarie Gaupp
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska-Lincoln, Lincoln NE, USA
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33
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van Duijkeren E, Catry B, Greko C, Moreno MA, Pomba MC, Pyörälä S, Ruzauskas M, Sanders P, Threlfall EJ, Torren-Edo J, Törneke K. Review on methicillin-resistant Staphylococcus pseudintermedius. J Antimicrob Chemother 2011; 66:2705-14. [PMID: 21930571 DOI: 10.1093/jac/dkr367] [Citation(s) in RCA: 179] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Staphylococcus pseudintermedius is an important opportunistic pathogen of companion animals, especially dogs. Since 2006 there has been a significant emergence of methicillin-resistant S. pseudintermedius (MRSP) mainly due to clonal spread. This article reviews research on MRSP with a focus on occurrence, methods used for identification, risk factors for colonization and infection, zoonotic potential and control options. Potential areas for future research are also discussed.
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Affiliation(s)
- Engeline van Duijkeren
- Faculty of Veterinary Medicine, Department of Infectious Diseases and Immunology, Utrecht University, Utrecht, The Netherlands.
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Decristophoris P, Fasola A, Benagli C, Tonolla M, Petrini O. Identification of Staphylococcus intermedius Group by MALDI-TOF MS. Syst Appl Microbiol 2011; 34:45-51. [PMID: 21300509 DOI: 10.1016/j.syapm.2010.11.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Revised: 10/28/2010] [Accepted: 11/16/2010] [Indexed: 11/19/2022]
Abstract
The Staphylococcus intermedius Group includes S. intermedius, S. pseudintermedius and S. delphini, coagulase-positive bacteria commonly isolated from animals. The identification of organisms belonging to this group is presently carried out using molecular methods. This study assessed the suitability of MALDI-TOF MS for their identification. 69 strains of different biological and geographic origins, identified by partial hsp60 gene sequencing as S. intermedius (n=15), S. pseudintermedius (n=32) and S. delphini (n=22), were analyzed by MALDI-TOF MS. The estimated sensitivity, specificity and efficiency were calculated. In addition we computed the agreement between the outcome of MALDI-TOF MS identification and partial hsp60 gene sequencing. The sensitivity of MALDI-TOF MS was higher for S. intermedius [0.95 (95% CI: 0.68-0.99)], than for S. pseudintermedius [0.78 (95% CI: 0.60-0.90)] and S. delphini [0.64 (95% CI: 0.41-0.83)], whereas the specificity was 1 for S. intermedius and S. delphini and 0.97 (95% CI: 0.86-0.99) for S. pseudintermedius. The Cohen's kappa coefficient indicated almost perfect agreement between MALDI-TOF MS and hsp60 gene sequencing for the identification of S. intermedius [0.96 (95% CI: 0.87-1.04)], and substantial agreement for S. delphini and S. pseudintermedius [0.70 (95% CI: 0.52-0.89) and 0.76 (95% CI: 0.616-0.92), respectively]. The overall efficiency of the proteomic identification ranged between 0.88 (95% CI: 0.78-0.95) for S. pseudintermedius and S. delphini and 0.99 (95% CI: 0.92-0.99) for S. intermedius. MALDI-TOF MS is thus a valuable and reliable tool for the rapid and accurate identification of bacteria belonging to the S. intermedius Group.
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Complete genome sequence of the veterinary pathogen Staphylococcus pseudintermedius strain HKU10-03, isolated in a case of canine pyoderma. J Bacteriol 2011; 193:1783-4. [PMID: 21278300 DOI: 10.1128/jb.00023-11] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Staphylococcus pseudintermedius is a member of the coagulase-positive staphylococci and is the commonest cause of canine pyoderma. We report the first genome sequence of S. pseudintermedius, which shows the presence of numerous virulence factors akin to those of the related human pathogen Staphylococcus aureus.
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Haenni M, Targant H, Forest K, Sévin C, Tapprest J, Laugier C, Madec JY. Retrospective Study of Necropsy-Associated Coagulase-Positive Staphylococci in Horses. J Vet Diagn Invest 2010; 22:953-6. [DOI: 10.1177/104063871002200617] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Coagulase-positive staphylococci (CoPS) are potential causative agents of equine infections, but they are rarely responsible for the death of the animal. In the current study, staphylococci implicated in the death or euthanasia of horses were retrospectively studied in 3,457 necropsies performed over a decade (1995-2006). Morbidity associated with CoPS was 1.7%, representing 60 isolates of CoPS, which were identified as Staphylococcus aureus (59) and Staphylococcus pseudintermedius (1). Coagulase-positive staphylococci (alone or in association with another bacterial species) were associated with the death or euthanasia of 90% of the cases (54/60). Proportions of antibiotic resistance to penicillin G and tetracycline reached 62.7% and 23.7%, respectively. Virulence genes were detected in 91.7% of the strains, with a majority of seh or sei enterotoxin genes. Finally, 3 methicillin-resistant Staphylococcus aureus (MRSA) isolates belonging to the t064 spa-type were identified. One strain was isolated in 2003 and might thus be one of the first cases of equine MRSA in France.
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Affiliation(s)
- Marisa Haenni
- Unité Antibiorésistance et Virulence Bactériennes, Lyon, France
| | - Hayette Targant
- Unité Antibiorésistance et Virulence Bactériennes, Lyon, France
| | - Karine Forest
- Unité Antibiorésistance et Virulence Bactériennes, Lyon, France
| | - Corinne Sévin
- Anses, Laboratoire d'Etudes et de Recherches en Pathologie Equine, Goustranville, France
| | - Jackie Tapprest
- Anses, Laboratoire d'Etudes et de Recherches en Pathologie Equine, Goustranville, France
| | - Claire Laugier
- Anses, Laboratoire d'Etudes et de Recherches en Pathologie Equine, Goustranville, France
| | - Jean-Yves Madec
- Unité Antibiorésistance et Virulence Bactériennes, Lyon, France
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Multiplex-PCR method for species identification of coagulase-positive staphylococci. J Clin Microbiol 2010; 48:765-9. [PMID: 20053855 DOI: 10.1128/jcm.01232-09] [Citation(s) in RCA: 286] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In veterinary medicine, coagulase-positive staphylococci (CoPS) other than Staphylococcus aureus have frequently been misidentified as being S. aureus strains, as they have several phenotypic traits in common. There has been no reliable method to distinguish among CoPS species in veterinary clinical laboratories. In the present study, we sequenced the thermonuclease (nuc) genes of staphylococcal species and devised a multiplex-PCR (M-PCR) method for species identification of CoPS by targeting the nuc gene locus. To evaluate sensitivity and specificity, we used this M-PCR method on 374 staphylococcal strains that had been previously identified to the species level by an hsp60 sequencing approach. We could successfully distinguish between S. aureus, S. hyicus, S. schleiferi, S. intermedius, S. pseudintermedius, and S. delphini groups A and B. The present method was both sensitive (99.8%) and specific (100%). Our M-PCR assay will allow the routine species identification of CoPS isolates from various animal species for clinical veterinary diagnosis.
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