scholarly journals Detection of Oxacillin (Methicillin)-resistant Staphylococcus aureus Isolated from a Tertiary-care Hospital, Georgetown, Guyana

2020 ◽  
pp. 1-7
Author(s):  
Paul Cheddie ◽  
Drovashti Seepersaud ◽  
Tereasia Ramlochan
Keyword(s):  
Staphylococcus Aureus ◽  
Tertiary Care Hospital ◽  
Methicillin Resistance ◽  
Tertiary Care ◽  
Hospital Setting ◽  
Tertiary Hospital ◽  
Care Hospital ◽  
Prevalence Survey ◽  
Methicillin Resistant ◽  
Broth Microdilution Method

Background and Aim: Methicillin-resistant Staphylocccus aureus (MRSA) continues to be a major problem globally. Previous data had suggested that the prevalence of MRSA infections in the tertiary hospital setting was 51%. The aim of this study was to conduct a point prevalence survey of MRSA infections occurring at a tertiary-care hospital in Georgetown, Guyana, and to determine to what extent methicillin-resistance was occurring among Staphylococcus aureus isolates utilising the minimum inhibitory concentration (MIC) data. Study Design: This study was based on a prospective, analytical design. Place and Duration of Study: Microbiology department, Georgetown Public Hospital Corporation (GPHC), and Department of Medical Technology, University of Guyana, between May 2019 and July 2019. Methodology: A total of 101 consecutive, non-repetitive, laboratory-identified MRSA and methicillin-susceptible Staphylococcus aureus (MSSA) isolates were tested using an oxacillin broth microdilution method. Results: We found that 65.4% of Staphylococcus aureus were oxacillin (methicillin) resistant with a majority of the isolates being high level oxacillin resistant strains (i.e., MICs > 256 μg/ml) (84.85%). Most of the resistant isolates were collected from patients admitted to medical and surgical wards. Conclusion: Methicillin-resistance continues to be a major problem in the hospital setting and conventional techniques are unlikely to identify all of the potentially resistant isolates.

scholarly journals Determination of MICs of Methicillin-resistant and Methicillin-susceptible Staphylococcus aureus Isolated from a Tertiary-care Hospital in Guyana

2019 ◽  
pp. 9-10
Author(s):  
Drovashti Seepersaud ◽  
Tereasia Ramlochan ◽  
Paul Cheddie
Keyword(s):  
Staphylococcus Aureus ◽  
Methicillin Resistance ◽  
Tertiary Care ◽  
Hospital Setting ◽  
Disk Diffusion ◽  
Diffusion Method ◽  
Care Hospital ◽  
Broth Microdilution ◽  
Methicillin Resistant ◽  
Broth Microdilution Method

Objective: Previous studies done in the hospital setting in Guyana have shown that the frequency of isolation of methicillin-resistant Staphylococcus aureus isolates far exceeds the worldwide estimate of 50%. These past studies have been based on the use of the Kirby-Bauer disk diffusion methodology. The present study was conducted to determine the minimum inhibitory concentration of clinical isolates of methicillin-susceptible and methicillin-resistant S. aureus using the broth microdilution method. Design and Methods: A total of 101 consecutive, non-repetitive S. aureus isolates obtained from the GPHC medical lab during a six-week period were included in the study. These isolates were identified as MRSA and MSSA by laboratory personnel using the cefoxitin disk diffusion method. The oxacillin MICs for all isolates obtained were determined using prepared oxacillin broth microdilution trays with concentrations ranging from 4 μg/ml to 256 μg/ml. All results were interpreted according to CLSI guidelines. Results: The prevalence of MRSA at GPHC was found to be 65.35% with a majority of the isolates being high level oxacillin resistant strains with MICs > 256 μg/ml (84.85%). In our study, most resistant isolates were collected from patients admitted to the FSW (16.67%), Paediatric Wards (13.65%), MSW (13.64%), and FMW (12.12%). Additionally, 35 (79.55%) MSSA were suspected oxacillin susceptible with MIC < 4 μg/ml. The relationship between the cefoxitin disc diffusion and oxacillin broth microdilution results was found to be statistically significant with a p < 0.001. Conclusion: Methicillin-resistance continues to be a major problem in the hospital setting, and this study has should that commonly used conventional techniques are unlikely to identify all of the potentially resistant isolates. Recommendation: The high prevalence and high oxacillin MIC of MRSA at GPHC suggests that more emphasis should be placed on infection control and surveillance programs within the hospital setting.

scholarly journals PROFILE OF STAPHYLOCOCCUS AUREUS ISOLATED FROM PATIENTS ADMITTED IN A TERTIARY CARE HOSPITAL WITH ESPECIAL REFERENCE TO METHICILLIN RESISTANCE

2020 ◽  
pp. 1-2
Author(s):  
Asmita Singh ◽  
Anita Pandey ◽  
Amit Singh ◽  
Priyanka Chaturvedi
Keyword(s):  
Staphylococcus Aureus ◽  
Antimicrobial Agents ◽  
Tertiary Care Hospital ◽  
Methicillin Resistance ◽  
Tertiary Care ◽  
Hospital Setting ◽  
Clinical Isolates ◽  
Care Hospital ◽  
Wide Range ◽  
High Level

BACKGROUND: Staphylococcus aureus is a major human pathogen that causes wide range of clinical infections. Methicillin-resistant Staphylococcus aureus(MRSA) is endemic in India and is a dangerous pathogen causing hospital acquired infection leadings to signicant morbidity and mortality. OBJECTIVE:To study the prole of Staphylococcus aureusisolated from patients admitted in a tertiary care hospital. RESULT: Majority of clinical isolates of S.aurueswas obtained from patients of skin and soft tissue infection(54.66%) followed by those suffering from respiratory infection (13.33%), blood stream infection (13.33%) and UTI(8%). S.aureus was predominantly isolated from IPD samples, maximum cases were in the age group of 31-40 years and males outnumbered females. There was predominance of MRSA 112 (74.66%)which showed high level of resistance to penicillin (100%), ciprooxacin (82.14 %), co-trimoxazole (79.46%) and moxioxacin(85.71%). All the clinical isolates of S.aureuswere sensitive to linezolid andvancomycin (MIC <1ugm/ml). CONCLUSIONS: The clinical isolates of S.aureusshowed high level of resistance to various antimicrobial agents which is a signicant nosocomial threat. Surveillance and infection control practices should be carried out to prevent cross transmission of such resistant pathogen within the hospital setting

scholarly journals In Vitro activity of a Novel Benzoquinolizine Antibiotic, Levonadifloxacin (WCK 771) against Blood Stream Gram-Positive Isolates from a Tertiary Care Hospital

2020 ◽  
Vol 12 (03) ◽  
pp. 230-232
Author(s):  
Dhruv Mamtora ◽  
Sanjith Saseedharan ◽  
Ritika Rampal ◽  
Prashant Joshi ◽  
Pallavi Bhalekar ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Tertiary Care Hospital ◽  
Tertiary Care ◽  
Blood Stream ◽  
Tolerability Profile ◽  
Care Hospital ◽  
Coagulase Negative Staphylococci ◽  
Gram Positive ◽  
Methicillin Resistant

Abstract Background Blood stream infections (BSIs) due to Gram-positive pathogens such as methicillin-resistant Staphylococcus aureus (MRSA) are associated with high mortality ranging from 10 to 60%. The current anti-MRSA agents have limitations with regards to safety and tolerability profile which limits their prolonged usage. Levonadifloxacin and its oral prodrug alalevonadifloxacin, a novel benzoquinolizine antibiotic, have recently been approved for acute bacterial skin and skin structure infections including diabetic foot infections and concurrent bacteremia in India. Methods The present study assessed the potency of levonadifloxacin, a novel benzoquinolizine antibiotic, against Gram-positive blood stream clinical isolates (n = 31) collected from January to June 2019 at a tertiary care hospital in Mumbai, India. The susceptibility of isolates to antibacterial agents was defined following the Clinical and Laboratory Standard Institute interpretive criteria (M100 E29). Results High prevalence of MRSA (62.5%), quinolone-resistant Staphylococcus aureus (QRSA) (87.5%), and methicillin-resistant coagulase-negative staphylococci (MR-CoNS) (82.35%) were observed among bacteremic isolates. Levonadifloxacin demonstrated potent activity against MRSA, QRSA, and MR-CoNS strains with significantly lower minimum inhibitory concentration MIC50/90 values of 0.5/1 mg/L as compared with levofloxacin (8/32 mg/L) and moxifloxacin (2/8 mg/L). Conclusion Potent bactericidal activity coupled with low MICs support usage of levonadifloxacin for the management of BSIs caused by multidrug resistant Gram-positive bacteria.

Distribution of MR-CoNS in the clinical staffs of tertiary care hospital

2021 ◽  
Vol 7 (2) ◽  
pp. 100-102
Author(s):  
Sonu S. Ahirwar ◽  
Prabhat Jatav ◽  
Kirti Kushwaha
Keyword(s):  
Low Income ◽  
Nasal Swab ◽  
Tertiary Care Hospital ◽  
Methicillin Resistance ◽  
Tertiary Care ◽  
Automated System ◽  
Diffusion Method ◽  
Care Hospital ◽  
Methicillin Resistant ◽  
Vitek 2

Methicillin-resistant coagulase-negative staphylococci (MR-CoNS) associated infection is a growing concern in healthcare settings now a day. MR-CoNS are the main infectious agents of the hospital acquired infection. Clinical staffs to patients transmission of resistant strains have caused a rapid increase in the prevalence of antimicrobial resistance in recent years. Growing rate of antimicrobial resistant against available antibiotics of MR-CoNS is a developing problem in low income or lower middle income counties. This study was conducted to determine the occurrence MR-CoNS isolated from different clinical staffs of tertiary care hospital. This prospective study conducted in clinical staffs, nasal swab were collected from all the participants. Screening of CoNS were done on the basis of cultural, morphological and biochemical tests, identification and AST analysis done by VITEK-2 automated system. Methicillin resistance pattern was checked by VITEK-2 and Kirby-Bauer disc diffusion method according to CLSI guideline. A total of 129 nasal swab samples were collected from clinical staffs, of which n=81 isolates (85.6%) were CoNS. Among n=81 CoNS, (48.12%) , (41.97%) , (7.4%) and (2.4%) were reported. Out of n=81 CoNS isolates, n=26 were conformed as MR-CoNS. Maximum methicillin resistance were reported in 53.48% (14/26), 42.30% (11/26), 3.84% (1/26) and 0% (0/26). Theoccurrence rate of MR-CoNS are higher (20.6%) in the healthcare workers and most of the methicillin resistant-CoNS isolates shows high level of resistance against widely used antibiotics but all the isolates susceptible against vancomycin.

scholarly journals Susceptibility of Clinical Isolates of Staphylococcus aureus to Ceftaroline

2021 ◽  
Author(s):  
Harsha Sreedharan ◽  
KB Asha Pai
Keyword(s):  
Staphylococcus Aureus ◽  
Tertiary Care Hospital ◽  
Methicillin Resistance ◽  
Descriptive Analysis ◽  
Tertiary Care ◽  
The United States ◽  
Clinical Isolates ◽  
Diffusion Method ◽  
Clinical Samples ◽  
Care Hospital

Introduction: Methicillin-Resistant Staphylococcus aureus(MRSA) infection is a major global healthcare problem, the prevalence of which varies from 25-50% in India. It is known to cause Skin and Soft tissue Infections (SSI), endovascular infections, endocarditis, pneumonia, septic arthritis, osteomyelitis, and sepsis. Vancomycin is the drug of choice for treating severe MRSA infections. Ceftaroline, a fifth-generation cephalosporin has been approved by the United States Food and Drug Administration (US FDA) for treating acute bacterial SSI caused by susceptible micro-organisms including MRSA, Community acquired respiratory tract infection, MRSA bacteremia and endocarditis. Aim: To assess the susceptibility of clinical isolates of S. aureusto ceftaroline, in a Tertiary Care Hospital. Materials and Methods: This prospective study was conducted in the Department of Microbiology of a Tertiary Care Hospital over a period of two months from June 2019 to July 2019. S.aureus isolates from various clinical samples were screened for methicillin resistance by disc diffusion method using cefoxitin disc and ceftaroline susceptibility of these isolates was assessed by E-strip method. The isolates were classified as ceftaroline susceptible, Susceptibility Dose Dependent (SDD) and ceftaroline resistant respectively as per CLSI guidelines. A descriptive analysis of the data was done and the results were presented as frequencies and percentages. Results: All the S.aureus isolates were found to be susceptible to ceftaroline. Methicillin Sensitive Staphylococcus aureus(MSSA) isolates had lower Minimum Inhibitory Concentration (MIC) when compared to MRSA. The highest MIC among MRSA was 0.5 μg/mL. Conclusion: Ceftaroline can be considered as an effective alternative for treatment of infections caused by MRSA.

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