scholarly journals Phenotypic Characterization and Antibiotics Combination Approach to Control the Methicillin-resistant Staphylococcus aureus (MRSA) Strains Isolated from the Hospital Derived Fomites

2011 ◽  
Vol 2 (2) ◽  
pp. 72-78 ◽  
Author(s):  
Pravin R Dudhagara ◽  
Anjana D Ghelani ◽  
Rajesh K Patel
Keyword(s):  
Staphylococcus Aureus ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Phenotypic Characterization ◽  
Isolation And Identification ◽  
Mannitol Salt Agar ◽  
Methicillin Resistant ◽  
Key Words Antibiotics ◽  
Mrsa Strains ◽  
Combination Approach ◽  
Mic Value

Objective: The emergence of antibiotic resistant Stphylococcus aureus strains have resulted in significant treatment difficulties which have imposed a burden on health care systems and simultaneously intensifying the need for new antimicrobial agents. Therefore, we have designed the study to determine the prevalence of Methicillin-resistant Staphylococcus aureus (MRSA) and their antimicrobial susceptibility pattern along with evaluation of antibiotic combination approach. Material & Methods: Isolation and identification of MRSA was carried out using Mannitol salt agar followed by Baird-Parker Agar and Vojel-Johnson Agar media. Strains were tested for the sensitivity against five β-lactum, two macrolide and one fluoroquinolone class of antibiotic. Further sensitivity was confirmed using 9 diverse- second and third generation antibiotics. MIC value of individual and mixture of antibiotics were measured using Mueller-Hinton broth. Results: Total 10 stains of S. aureus were isolated and characterised using standard biochemical tests. They were identified using on-line identification tool- GIDEON (Global Infectious Disease and Epidemiology Network). Almost 50% strains were reported having variable reaction against at least one or more antibiotic. By the use of augmentin (30μg), cephotaxime (30μg), ceftriaxone (30μg), cefuroxime (30μg), ciprofloxacin (5μg), clindamycin (2μg), gentamycin (10μg), lincomycin (2μg) and tobramycin (10μg) further susceptibility tesing was carried out which reveals absolute resistant in 70% of strains, whereas, remeaning strains were seen having variable responses against five antibiotics. However, with comparison to standard antibiotic zone of inhibition, all strains were categorized as a resistant. An individual application of ampicillin, tetracycline and amikacin required higher concentration to inhibited all the stains while combination of two or three antibiotics were identified having low MIC value. Combination of tetracycline with sulbactam and cefoperazone was found best to contol MRSA. Conclusion: Study highlights the wide spread presence of MRSA strains in fomites derived from hospital. These indicate the need of more precaution in clinic area to control the spread of the MRSA. Amalgamation of antibiotics is an effective remedy for MRSA infections and promising approach in developing country. Key Words: Antibiotics combination; fomites; MRSA; Staphylococcus aureus DOI: http://dx.doi.org/10.3126/ajms.v2i2.4258 Asian Journal of Medical Sciences 2 (2011) 72-78

scholarly journals Nasal carriage of methicillin-resistant Staphylococcus aureus among medical students of Belgrade University

2013 ◽  
Vol 141 (5-6) ◽  
pp. 349-353 ◽  
Author(s):  
Ivana Cirkovic ◽  
Slobodanka Djukic ◽  
Dragana Vukovic ◽  
Goran Stevanovic ◽  
Milena Svabic-Vlahovic ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Medical Students ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Sccmec Type ◽  
Nasal Carriage ◽  
Phenotypic Characteristics ◽  
Carriage Rate ◽  
Mannitol Salt Agar ◽  
Methicillin Resistant ◽  
Mrsa Strains

Introduction Infections caused by methicillin-resistant Staphylococcus aureus (MRSA) present the growing problem in the whole world. Carriage of MRSA is most frequent in the nose, and medical students come in contact both with patients and different persons in the community. Therefore, they may be significant for the transmission of MRSA from hospitals to out- of-hospital communities and vice versa. Objective. The aim of this study was to establish the carriage rate among students of the second, third and fourth year of study at the School of Medicine in Belgrade and to analyze their genotypic and phenotypic characteristics. Methods. In total 533 nasal samples were taken. The samples were incubated in Trypcase-soy broth supplemented with 6.5% NaCl, and thereafter the swabs were inoculated on mannitol salt agar supplemented with 2 ?g/mL of oxacillin. The presence of nuc, mecA and Panton-Valentine leukocidin genes was examined by PCR. The characteristics of the MRSA strains were determined using: antibiotic susceptibility testing by Vitek2 System, SCCmec, agr typing and MLST. Results. MRSA was isolated from two of 533 investigated samples (0.37%). MRSA were isolated from the students of the second and third year of study. Profiles of strains were: ST80 (SCCmec type IV, agr type 3) and ST152 (SCCmec type V, agr type 1). MRSA strains were multiresistant. Conclusion. The nasal carriage rate of MRSA in population of medical students of the first year of study in Belgrade is low. Genotypic and phenotypic characteristics of MRSA strains indicate their community origin. MLST typing revealed that isolates belong to ST80 and ST152.

scholarly journals Methicillin resistant Staphylococcus aureus (MRSA) carriage among health care workers in a tertiary care hospital in Bhubaneswar

2018 ◽  
Vol 5 (8) ◽  
pp. 3276
Author(s):  
Nipa Singh ◽  
Sourav Mohanty ◽  
Subhra Snigdha Panda ◽  
Smrutilata Sahoo ◽  
Dipti Pattnaik ◽  
...  
Keyword(s):  
Health Care ◽  
Staphylococcus Aureus ◽  
Health Care Workers ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Care Hospital ◽  
Mannitol Salt Agar ◽  
Methicillin Resistant ◽  
Care Workers ◽  
Hospital Infection Control ◽  
Mrsa Strains

Background: Methicillin resistant Staphylococcus aureus (MRSA) is a multidrug resistant organism emerging as a major cause of hospital acquired infection. In a healthcare setup a patient may acquire MRSA through the hands, clothes and equipments of health care workers. Screening of health care workers colonised with MRSA will be helpful in preventing the spread of this organism in a hospital. With this background the present study was undertaken to estimate the carriage rate of MRSA among healthcare workers in our hospital.Methods: Nasal swabs were collected from 120 health care workers working in Kalinga Institute of Medical Sciences (KIMS), Bhubaneswar during the study period of July- September 2017. The swabs were inoculated onto mannitol salt agar plates for isolation of Staphylococcus aureus. MRSA strains were identified by cefoxitin disc method. Antibiogram of MRSA strains was determined.Results: The prevalence of MRSA carriage among health care workers was 7.5% with the carrier rate being highest among nurses (10%). All the MRSA isolates were 100% resistant to penicillin. MRSA isolates were 90% resistant to amoxyclav, 60% to cotrimoxazole and erythromycin and 50% to clindamycin.Conclusions: Although the prevalence of MRSA among health care workers in our hospital is not alarming, it is important to emphasize the need for stringent hospital infection control policies to reduce the spread of MRSA to susceptible individuals.

scholarly journals Antibiotic Resistance, spa Typing and Clonal Analysis of Methicillin-Resistant Staphylococcus aureus (MRSA) Isolates from Blood of Patients Hospitalized in the Czech Republic

Antibiotics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 395
Author(s):  
Katarina Pomorska ◽  
Vladislav Jakubu ◽  
Lucia Malisova ◽  
Marta Fridrichova ◽  
Martin Musilek ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Czech Republic ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Bloodstream Infections ◽  
Spa Typing ◽  
The Czech Republic ◽  
Methicillin Resistant ◽  
Mrsa Strains ◽  
Spa Types ◽  
Repeat Pattern

Staphylococcus aureus is one of the major causes of bloodstream infections. The aim of our study was to characterize methicillin-resistant Staphylococcus aureus (MRSA) isolates from blood of patients hospitalized in the Czech Republic between 2016 and 2018. All MRSA strains were tested for antibiotic susceptibility, analyzed by spa typing and clustered using a Based Upon Repeat Pattern (BURP) algorithm. The representative isolates of the four most common spa types and representative isolates of all spa clonal complexes were further typed by multilocus sequence typing (MLST) and staphylococcal cassette chromosome mec (SCCmec) typing. The majority of MRSA strains were resistant to ciprofloxacin (94%), erythromycin (95.5%) and clindamycin (95.6%). Among the 618 strains analyzed, 52 different spa types were detected. BURP analysis divided them into six different clusters. The most common spa types were t003, t586, t014 and t002, all belonging to the CC5 (clonal complex). CC5 was the most abundant MLST CC of our study, comprising of 91.7% (n = 565) of spa-typeable isolates. Other CCs present in our study were CC398, CC22, CC8, CC45 and CC97. To our knowledge, this is the biggest nationwide study aimed at typing MRSA blood isolates from the Czech Republic.

scholarly journals Detection of Methicillin Resistant Staphylococcus aureus in Dairy Products and Anterior Nares of Dairy Workers

2019 ◽  
Vol 6 ◽  
pp. 59-62
Author(s):  
Ranjana K.C. ◽  
Ganga Timilsina ◽  
Anjana Singh ◽  
Supriya Sharma
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Susceptibility ◽  
Dairy Products ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Dairy Product ◽  
Control Measures ◽  
Diffusion Method ◽  
Mannitol Salt Agar ◽  
Methicillin Resistant ◽  
Dairy Workers

Objectives: To isolate methicillin resistant Staphylococcus aureus (MRSA) from anterior nares of dairy workers and dairy products and assess the antibiotic susceptibility pattern of the isolates. Methods: Swab samples collected from anterior nares of dairy workers and dairy product (butter) were inoculated into mannitol salt agar and incubated at 37ºC for 24 hours. Identification was done based on colony characteristics, Gram's staining, catalase, oxidase and coagulase test. Antibiotic susceptibility testing was done by modified Kirby Bauer disc diffusion method. MRSA was confirmed by using cefoxitin disc. Results: A total of 109 S. aureus (98 from dairy workers and 11 from butter samples) were isolated. Out of them 32 MRSA were isolated from dairy workers and 4 from butter samples. The association between age group and MRSA was found insignificant (p = 0.115). The association of MRSA between male and female workers was found significant (>0.05). About 86% of the MRSA isolates were susceptible to Gentamicin (86.11%) followed by Ciprofloxacin (77.78%). Conclusion: Detection of MRSA among dairy workers and dairy products warrants proper handling and adequate control measures to prevent transmission of MRSA from dairy industry.

Multiclonal outbreak of methicillin-resistant Staphylococcus aureus infections on a collegiate football team

2008 ◽  
Vol 137 (1) ◽  
pp. 85-93 ◽  
Author(s):  
A. J. HALL ◽  
D. BIXLER ◽  
L. E. HADDY
Keyword(s):  
Staphylococcus Aureus ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Infection Risk ◽  
Physical Contact ◽  
Soft Tissue Infections ◽  
Risk Of Infection ◽  
Methicillin Resistant ◽  
Football Team ◽  
Mrsa Strains ◽  
Collegiate Football

SUMMARYAn outbreak of methicillin-resistant Staphylococcus aureus (MRSA) skin and soft tissue infections (SSTIs) occurred in a college football team in August 2006. Of 109 players on the team roster, 88 (81%) were interviewed during a cohort investigation. Twenty-five cases were identified, six of which were culture-confirmed. Available culture isolates were typed by pulsed-field gel electrophoresis (PFGE), which identified two different MRSA strains associated with the outbreak. Playing positions with the most physical contact (offensive linemen, defensive linemen, and tight ends) had the greatest risk of infection [risk ratio (RR) 5·1, 95% confidence interval (CI) 2·3–11·5. Other risk factors included recent skin trauma (RR 1·9, 95% CI 0·95–3·7), use of therapeutic hydrocollator packs (RR 2·5, 95% CI 1·1–5·7), and miscellaneous training equipment use (RR 2·1, 95% CI 1·1–4·1). The outbreak was successfully controlled through team education and implementation of improved infection-control practices and hygiene policies.

Multilocus Sequence Typing and Staphylococcal Protein A Typing Revealed Novel and Diverse Clones of Methicillin-Resistant Staphylococcus aureus in Seafood and the Aquatic Environment

2017 ◽  
Vol 80 (3) ◽  
pp. 476-481 ◽  
Author(s):  
V. Murugadas ◽  
C. Joseph Toms ◽  
Sara A. Reethu ◽  
K. V. Lalitha
Keyword(s):  
Staphylococcus Aureus ◽  
Aquatic Environment ◽  
Multilocus Sequence Typing ◽  
Methicillin Resistant Staphylococcus Aureus ◽  
Protein A ◽  
Staphylococcal Protein A ◽  
Spa Typing ◽  
Methicillin Resistant ◽  
Staphylococcal Protein ◽  
Mrsa Strains

ABSTRACT Methicillin-resistant Staphylococcus aureus (MRSA) has been a global health concern since the 1960s, and isolation of this pathogen from food-producing animals has been increasing. However, little information is available on the prevalence of MRSA and its clonal characteristics in seafood and the aquatic environment. In this study, 267 seafood and aquatic environment samples were collected from three districts of Kerala, India. Staphylococcal protein A (spa) typing and multilocus sequence typing (MLST) was performed for 65 MRSA strains isolated from 20 seafood and aquatic environment samples. The MRSA clonal profiles were t657-ST772, t002-ST5, t334-ST5, t311-ST5, t121-ST8, t186-ST88, t127-ST1, and two non-spa assignable strains. Whole spa gene sequence analysis along with MLST confirmed one strain as t711-ST6 and another as a novel MRSA clone identified for the first time in seafood and the aquatic environment with a t15669 spa type and a new MLST profile of ST420-256-236-66-82-411-477. The MRSA strains were clustered into five clonal complexes based on the goeBURST algorithm, indicating high diversity among MRSA strains in seafood and the aquatic environment. The novel clone formed a separate clonal complex with matches to three loci. This study recommends large-scale spa typing and MLST of MRSA isolates from seafood and the aquatic environment to determine the prevalence of new MRSA clones. This monitoring process can be useful for tracing local spread of MRSA isolates into the seafood production chain in a defined geographical area.

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