• Title/Summary/Keyword: Staphylococcus species

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Staphylococcus Species in the Dental and Medical Environment

  • Han, Seung-Ho;Kim, Shin-Moo;Jeong, Seung-Il;Kim, Kang-Ju
    • International Journal of Oral Biology
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    • v.38 no.1
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    • pp.1-4
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    • 2013
  • Staphylococcus species are one of prevalent pathogens found in hospitals. Microbes that are a primary cause of nosocomial infection were isolated from a dental and medical environment it may assist the reader to explain what this is and how it differs from the 'dental health care providers and ward health care providers'. To investigate the distribution of staphylococcus species in this environment, we used vitek II to measure drug sensitivity, and further performed biochemical testing. The isolation rate of staphylococcus species from the dental and medical environment was 100% but from dental health care providers and ward health care providers were 44.4% and 33.3%, respectively. In the analyses, staphylococcus species showed resistance to diffusion of cefoxitin and oxacillin discs. These staphylococci may be sufficiently positive for the mecA gene. Our results suggest that staphylococci might be an important cause of nosocomial infection in the dental clinic.

Identification of the Predominant Species of Bacillus, Staphylococcus, and Lactic Acid Bacteria in Nuruk, a Korean Starter Culture (배양법을 이용한 누룩 발효 관련 Bacillus 속, Staphylococcus 속 세균 및 유산균의 우점종 확인)

  • Saeyoung Seo;Do-Won Jeong;Jong-Hoon Lee
    • Microbiology and Biotechnology Letters
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    • v.51 no.1
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    • pp.93-98
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    • 2023
  • Nuruk is a starter culture of Korea manufactured by spontaneous fermentation of grains. We isolated bacteria of the genera Bacillus and Staphylococcus, and lactic acid bacteria (LAB) from eight commercial nuruk samples collected from four districts of Korea using selective agar media and identified them based current taxonomic standards. Bacillus was detected in all samples, but Staphylococcus or LAB were not detected in three samples. In seven samples, except one sample scored the highest cell number of LAB, Bacillus and Staphylococcus were counted as the highest and the lowest numbers, respectively. Six species of Bacillus were identified, and B. subtilis, B. velezensis, and B. licheniformis were predominant species. Nine species of coagulase-negative Staphylococcus were identified, and the predominance of S. pseudoxylosus and S. saprophyticus was confirmed. Ten species of LAB including Enterococcus, Lactobacillus and close relatives, Pediococcus, and Weissella were identified. P. pentosaceus was identified as the predominant species.

Rapid Identification of Staphylococcus Species Isolated from Food Samples by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry

  • Kim, Eiseul;Kim, Hyun-Joong;Yang, Seung-Min;Kim, Chang-Gyeom;Choo, Dong-Won;Kim, Hae-Yeong
    • Journal of Microbiology and Biotechnology
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    • v.29 no.4
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    • pp.548-557
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    • 2019
  • Staphylococcus species have a ubiquitous habitat in a wide range of foods, thus the ability to identify staphylococci at the species level is critical in the food industry. In this study, we performed rapid identification of Staphylococcus species using Matrix-Assisted Laser Desorption/Ionization Time-of-Flight mass spectrometry (MALDI-TOF MS). MALDI-TOF MS was evaluated for the identification of Staphylococcus reference strains (n = 19) and isolates (n = 96) from various foods with consideration for the impact of sample preparation methods and incubation period. Additionally, the spectra of isolated Staphylococcus strains were analyzed using principal component analysis (PCA) and a main spectra profile (MSP)-based dendrogram. MALDI-TOF MS accurately identified Staphylococcus reference strains and isolated strains: the highest performance was by the EX method (83.3~89.5% accuracy) at species level identification (EDT, 70.3~78.9% accuracy; DT, less than 46.3~63.2% accuracy) of 24-h cultured colonies. Identification results at the genus level were 100% accurate at EDT, EX sample preparation and 24-h incubation time. On the other hand, the DT method showed relatively low identification accuracy in all extraction methods and incubation times. The analyzed spectra and MSP-based dendrogram showed that the isolated Staphylococcus strains were characterized at the species level. The performance analysis of MALDI-TOF MS shows the method has the potential ability to discriminate between Staphylococcus species from foods in Korea. This study provides valuable information that MALDI-TOF MS can be applied to monitor microbial populations and pathogenic bacteria in the food industry thereby contributing to food safety.

Isolation Frequency of Staphylococcus species from Clinical Materials (임상검체에서 포도알균의 분리 빈도)

  • Shin, Hyun-Sung;Park, Youn-Bo
    • Korean Journal of Clinical Laboratory Science
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    • v.39 no.2
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    • pp.76-85
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    • 2007
  • The total number of clinical materials collected from Dec 1, 2005 to Nov 30, 2006 in C. hospital was 63,133. Among these materials, the isolation of Staphylococcus spp. was 5,252 strains. The proportions of Staphylococcus species infection were as follows ; 46.7% in S. aureus, 39.3% in S. epidermidis, 4.7% in S. hominis, 3.8% in S. haemolyticus, 2.9% in S. capitis and 2.5% in others. Seventeen strains of Staphylococcus species were identified with an isolation range of 0.02-46.7%. The isolation ratios of Staphylococcus species were 7.8% (2,134/27,362) in female, 8.7% (3,118/35,807) in male and 8.3% (5,252/63,133) in both. The age-related frequencies of Staphylococcus species were 22.1% in the 60-69 year group, 19.3% in the 70-79 year group and 17.1% in the 50-59 year group. The isolation ratio of the 0-49 year group to the 50-over 80 year group were 1.74 times in female, 1.92 in male and 1.85 in both. The isolation frequency of Staphylococcus spp. was at its highest in April (9.9%) and at its lowest in February (6.8%) according to monthly analysis. According to seasonal variation, the isolation frequencies of Staphylococcus spp. were 27.0% in Summer, 25.9% in Spring, 23.9% in Fall and 23.2% in Winter. The clinical departments showing over 9% isolation rate against Staphylococcus spp. were critical care medicine (12.9%), department of pediatrics (11.6%), department of urology (9.8%) and department of neuro-surgery (9.1%). On the other hand, the lowest number was observed in the department of family medicine. The clinical material showing over 15% isolation rate against Staphylococcus spp. were 32.1% in urine (random urine and catheterized urine), 20.6% in blood and 16.0% in sputum.

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Comparison of fatty acid composition of Staphylococcus sp isolated from bovine mastitis milk (유방염 감염 우유에서 분리된 Staphylococcus sp의 지방산 조성 비교)

  • Kim, Soon-Tae;Kim, Sin;Kim, Sang-Young;Son, Jae-Kweon
    • Korean Journal of Veterinary Service
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    • v.20 no.1
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    • pp.37-45
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    • 1997
  • The result of API staph-ident system was compared with cellular fatty acid composition for the identification of Staphylococcus species isolated from cattle. Isolated strains from cattle were correctly identified to S aureus, S intermedius, S hyicus, S simulans, S saprophyticus, S epidemis, S sciuri and S xylosus by API staph-ident system. The correlation between bacterial cellular fatty acid profile and Staphylococcus species isolated to API STAPH-IDENT system were. In conclusion, the result presented indicate that Staphylococci can be indentified to the species level by the cellular fatty acid profiles. Moreover, computerized fatty acid profile correlative anaylsis can be applied for determining identify of Staphylococcus species.

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Transcriptional Interplay between Malassezia restricta and Staphylococcus Species Co-Existing in the Skin Environment

  • Hyun Oh Yang;Yong-Joon Cho;Jae Min Lee;Kyoung-Dong Kim
    • Journal of Microbiology and Biotechnology
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    • v.33 no.3
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    • pp.319-328
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    • 2023
  • Malassezia and Staphylococcus are the most dominant genera in human skin microbiome. To explore the inter-kingdom interactions between the two genera, we examined the transcriptional changes in Malassezia and Staphylococcus species induced upon co-culturing. RNA-seq analyses revealed that genes encoding ribosomal proteins were upregulated, while those encoding aspartyl proteases were downregulated in M. restricta after co-culturing with Staphylococcus species. We identified MRET_3770 as a major secretory aspartyl protease coding gene in M. restricta through pepstatin-A affinity chromatography followed by mass spectrometry and found that the expression of MRET_3770 was significantly repressed upon co-culturing with Staphylococcus species or by incubation in media with reduced pH. Moreover, biofilm formation by Staphylococcus aureus was inhibited in the spent medium of M. restricta, suggesting that biomolecules secreted by M. restricta such as secretory aspartyl proteases may degrade the biofilm structure. We also examined the transcriptional changes in S. aureus co-cultured with M. restricta and found co-cultured S. aureus showed increased expression of genes encoding ribosomal proteins and downregulation of those involved in riboflavin metabolism. These transcriptome data of co-cultured fungal and bacterial species demonstrate a dynamic interplay between the two co-existing genera.

The Experimental Study of Efficacy in Using Fel Ursi, Bovis Calculus & Moschus Pharmacopuncture Solution as Eye Drop (점안용 웅담.우황.사향약침액의 유효성 평가)

  • Seo, Hyung-Sik
    • Journal of Pharmacopuncture
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    • v.12 no.3
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    • pp.41-47
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    • 2009
  • Objectives : This experimental study was performed to investigate the efficacy of Fel Ursi, Bovis Calculus & Moschus pharmacopuncture solution manufactured with freezing dryness method to use eye drop. Methods : After administering Fel Ursi, Bovis Calculus & Moschus pharmacopuncture solution on bacterial species(Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum, Candida albicans) which cause Keratitis, MIC(Minimum Inhibition Concentration) and the size of inhibition zone were measured. Anti-bacterial potency was also measured using the size of inhibition zone. Results : There was no response to MIC on bacterial species(Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum, Candida albicans) after Fel Ursi, Bovis Calculus & Moschus pharmacopuncture solution was medicated. Conclusions : The present study suggests that Fel Ursi, Bovis Calculus & Moschus pharmacopuncture solution dosen't have anti-bacterial effects on bacterial species(Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum, Candida albicans) which cause Keratitis. These study result recommends that more research on other herbal medicines of eye drop for Keratitis are required.

Comparative Genomic Analysis of Food-Originated Coagulase-Negative Staphylococcus: Analysis of Conserved Core Genes and Diversity of the Pan-Genome

  • Heo, Sojeong;Lee, Jung-Sug;Lee, Jong-Hoon;Jeong, Do-Won
    • Journal of Microbiology and Biotechnology
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    • v.30 no.3
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    • pp.341-351
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    • 2020
  • To shed light on the genetic differences among food-originated coagulase-negative Staphylococcus (CNS), we performed pan-genome analysis of five species: Staphylococcus carnosus (two strains), Staphylococcus equorum (two strains), Staphylococcus succinus (three strains), Staphylococcus xylosus (two strains), and Staphylococcus saprophyticus (one strain). The pan-genome size increases with each new strain and currently holds about 4,500 genes from 10 genomes. Specific genes were shown to be strain dependent but not species dependent. Most specific genes were of unknown function or encoded restriction-modification enzymes, transposases, or prophages. Our results indicate that unique genes have been acquired or lost by convergent evolution within individual strains.

Identification of the Predominant Bacillus, Enterococcus, and Staphylococcus Species in Meju, a Spontaneously Fermented Soybean Product (메주 발효 관련 Bacillus, Enterococcus, Staphylococcus 속 우점종 확인)

  • Jang, Mihyun;Jeong, Do-Won;Lee, Jong-Hoon
    • Microbiology and Biotechnology Letters
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    • v.47 no.3
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    • pp.359-363
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    • 2019
  • Meju is a spontaneously fermented soybean product produced in Korea. We isolated the bacteria of the genera Bacillus, Enterococcus, and Staphylococcus from 12 meju samples collected from five regions of Korea using selective media, and we identified them based on the sequence analysis of 16S ribosomal RNA and gmk (guanylate kinase) genes. Bacillus and Enterococcus strains were identified from all samples and the numbers of Bacillus strains in the 11 samples were >15% of the total cell number. Therefore, the genus Bacillus was confirmed as the predominant bacterial group of meju. Staphylococcus strains were identified from six samples. The identified 151 Bacillus isolates predominated in the following order: B. velezensis, B. sonorensis, B. subtilis, and B. licheniformis. Among the 165 Enterococcus isolates, 163 strains were identified as E. faecium. Eighty-two Staphylococcus isolates were classified into six species of coagulase-negative Staphylococcus group and S. xylosus was the predominant species.

The Experimental Study on the Antibiotic Effects of Fel Ursi Pharmacopuncture Solution on Bacterial Species which cause Keratitis (웅담약침액이 다종의 각막염 유발균에 미치는 항균력에 대한 실험)

  • Yoon, Seong-Sik;Seo, Hyung-Sik
    • Journal of Pharmacopuncture
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    • v.13 no.1
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    • pp.45-52
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    • 2010
  • Objectives : This experimental study was performed to investigate the effectiveness of Fel Ursi Pharmacopunture solution(FUPS) manufactured by using alcohol/water extraction method. To identify the use of it as eyedrops, antibacterial test on Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum, and Candida albicans was performed. Methods : After treatment FUPS on bacterial species(Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum, Candida albicans) which cause Keratitis, we investigated anti-bacterial effects of FUPS on Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum, Candida albicans in terms of measuring MIC and size of inhibition zone respectively. Results : After FUPS was treated, significant changes of MIC on Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum and Candida albicans were not observed at all. Conclusions : The present study suggests that FUPS doesn't have anti-bacterial effects on Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Aspergillus niger, Fusarium oxysporum and Candida albicans which cause Keratitis. Perhap These results recommend that FUPS doesn't have anti-bacterial effects but have other mechanism which suppress inflammation.