MACROLIDE-LINCOSAMIDE-STREPTOGRAMIN B RESISTANCE AMONG STAPHYLOCOCCUS AUREUS IN CHITWAN MEDICAL COLLEGE TEACHING HOSPITAL, NEPAL

Objectives: Staphylococcus aureus is often linked with human infection. Clindamycin is one of the key substitute antimicrobial agents in the treatment of S. aureus, especially in methicillin-resistant S. aureus (MRSA) infections. Inducible macrolide-lincosamide-streptogramin B (iMLS B) resistance is a crucial factor in antimicrobial susceptibility testing. The intention of the research was to identify S. aureus from distinct clinical specimens and investigate the prevalence of inducible clindamycin resistance among them and also study their association with MRSA. Methods: A descriptive cross-sectional study was accomplished in the Dept. of Microbiology CMC-TH, Nepal from January 2018 to December 2020 with 525 non-repeated S. aureus obtained from a different clinical specimen. Antibiotic susceptibility test was performed by Kirby–Bauer disc diffusion method. MRSA was detected using cefoxitin (30 μg) and results were interpreted as stated by CLSI. “D-Test” was done by applying erythromycin (15 μg) and clindamycin (2 μg) as per CLSI guidelines. Data were analyzed using SPSS IBM version 20. Results: Among 525 isolates, there were 315 (60.00%) MRSA. Results of D test analysis showed that 280 (53.33%) were MLSB sensitive while 245 (46.67%) were MLSB resistant; where 80 (15.24%) iMLSB with D zone, 100 (19.05%) constitutive MLSB (cMLSB) phenotype, and 65 (12.38%) MS phenotype. Of a total of 80 iMLSB, a significant proportion of 64 (80.00%) was MRSA (p<0.001). All the isolates were sensitive to vancomycin, teicoplanin, and linezolid. The prevalence of both iMLSB and cMLSB was high among MRSA. Conclusion: In this study, cMLSB phenotype was predominant (19.05%) followed by iMLSB phenotype (15.25%) and then MS phenotype (12.38%). Inducible iMLS B phenotypes, as well as cMLSB, are higher among MRSA. It is advisable to include “D-Test” as a part of regular antibiotic susceptibility testing to detect iMLSB resistance among S. aureus.

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Microbial Diversity and Antibiotic Susceptibility Pattern of Bacteria Associated with Motorcycle Helmets

International Journal of Microbiology ◽

10.1155/2020/8877200 ◽

2020 ◽

Vol 2020 ◽

pp. 1-7

Author(s):

Sanjeep Sapkota ◽

Sujan Khadka ◽

Sanjib Adhikari ◽

Ashish Parajuli ◽

Hemraj Kandel ◽

...

Keyword(s):

Staphylococcus Aureus ◽

Microbial Diversity ◽

Antibiotic Susceptibility ◽

Pathogenic Bacteria ◽

Diffusion Method ◽

Beta Lactamase ◽

Bacterial Isolates ◽

Cross Sectional ◽

Antibiotic Susceptibility Test ◽

Motorcycle Helmets

Background. Motorcycle helmets can serve as a potential vehicle for the transmission of pathogenic bacteria and fungi with serious health implications. The main aim of this study was to explore the microbial diversity associated with the motorcycle helmets and determine the antibiotic susceptibility profile of the bacterial isolates. Methods. A descriptive cross-sectional study was carried out among the teaching staffs of Birendra Multiple Campus, Bharatpur, Nepal. A total of 130 motorcycle helmets worn by the teaching staffs of the Birendra Multiple Campus, Bharatpur, were included in the study for microbiological investigations. Results. Of the total 130 motorcycle helmets analyzed, 392 bacteria and 346 fungi belonging to seven different genera were recovered. Staphylococcus aureus 89 (22.7%) was the predominant bacteria followed by S. epidermidis 77 (19.6%) and E. coli 54 (13.8%), whereas Aspergillus niger 67 (19.4%) was the predominant fungi followed by A. fumigatus 49 (14.2%). Antibiotic susceptibility test was performed by the disc diffusion method for all the bacterial isolates. Tetracycline, gentamycin, and cotrimoxazole were the most effective antibiotics for Gram-positive isolates, whereas Gram-negative isolates were sensitive towards imipenem and ciprofloxacin. Of the total bacterial isolates, 153 (39.0%) were multidrug-resistant (MDR), 10.4% were extended-spectrum beta-lactamase (ESBL) producers, and 4.3% were metallo-beta-lactamase (MBL) producers and, out of 89 isolates of Staphylococcus aureus, 30 (33.7%) were detected as methicillin-resistant Staphylococcus aureus (MRSA). Conclusion. The findings suggest that motorcycle riders should follow good hygiene practices and regularly clean their helmets with suitable sterilants to avoid the risk of microbial contamination and reduce the associated risks.

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Epidemiology, risk factors and antimicrobial resistance of Escherichia coli bacteremia

The Journal of Sylhet Women’s Medical College ◽

10.47648/jswmc2021v1102-07 ◽

2021 ◽

Vol 11 (Number 2) ◽

pp. 58-67

Author(s):

Mahjuba Umme Salam ◽

Selina Yasmin ◽

Md. Rashedul Haque ◽

Sharmin Ahmed ◽

Shahidul Alam ◽

...

Keyword(s):

Risk Factors ◽

Escherichia Coli ◽

Antimicrobial Resistance ◽

Antibiotic Susceptibility ◽

Antimicrobial Agents ◽

Blood Stream Infection ◽

Incidence Rates ◽

Diffusion Method ◽

Antibiotic Susceptibility Test ◽

Multiple Drugs

Background: Escherichia coli is a common causative of blood stream infection having potentials to produce significant morbidity and mortality. This organism also has the ability to develop resistance against antimicrobial agents. Knowing its epidemiology, risk factors and antimicrobial resistance patterns can help preventing and managing bacteremia caused by this organism. Materials and methods: This was across sectional observational study carried out from February 2017 to February 2018 on 64 blood culture positive Escherichia coli infected patients admitted in Medicine inpatient of a medical college hospital. Age, sex, mode of acquisition of infection, history of prior empiric antibiotic treatment, duration of hospital stay, development of complication were observed and noted. Antibiotic susceptibility test for all isolates was performed by Kirby-Bauer disc diffusion method. Predesigned semi-structured data collection from was used and collected data were analyzed manually and expressed in descriptive statistical terms. Results: Of the 64 enrolled patients, 47(73.43%) were female. Average age of affection was 53.48±20.65 years and increased incidence rates (51.56%) was observed at age >60 years. Infection was communityacquired in 35.84% cases and urinary tract infection was the most frequent (46.3) risk factor. More than eighty seven percent of samples showed resistance to at least one antimicrobial agent and resistance to multiple drugs was associated with complications. Conclusion: Escherichia coli bacteremia has high incidence rates for antimicrobial resistance and mortality. Continuous surveillance and antibiotic susceptibility pattern monitoring is essential to develop regional antibiotic therapy protocols.

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Urinary tract infections and antibiotic susceptibility among the patients attending B & D hospital of Lalitpur, Nepal

Asian Journal of Medical Sciences ◽

10.3126/ajms.v7i5.14908 ◽

2016 ◽

Vol 7 (5) ◽

pp. 47-51 ◽

Cited By ~ 1

Author(s):

Yadav Prasad Joshi ◽

Shreejeet Shrestha ◽

Russell Kabir ◽

Anita Thapa ◽

Parbati Upreti ◽

...

Keyword(s):

Urinary Tract ◽

Tract Infection ◽

Antibiotic Susceptibility ◽

Bacterial Infections ◽

Antimicrobial Agents ◽

Cross Sectional Study ◽

Diffusion Method ◽

Disk Diffusion Method ◽

Cross Sectional ◽

Tract Infections

Background:Urinary tract infection is the most common bacterial infections in humans and serious health problem in many parts of the world. It has become more complicated in treatment due to different pathogens and increasing resistant to antimicrobial agents. This study aims to investigate the prevalence of urinary tract infection and antibiotic susceptibility patterns of pathogens among the patients attending in B & B hospital Nepal.Materials and Methods:A hospital based cross sectional study was conducted in between April 2010 to March 2011. Urine samples were collected from clinically suspected patients and tested bacteriologically using standard procedures. Antimicrobial susceptibility test was performed for isolated pathogen using the Kirby-Bauer disk diffusion method according to Clinical and Laboratory Standards Institute guidelines.Results:Out of 1260 examined specimens 25.24 % were positive and majority 61.64% were females. The most common pathogens isolated were Escherichia coli (66.67%), Enterococcus (7.55%) and Staphylococcus (6.60 %). The drug resistant among the positive cases were reported. The highest resistant of positive cases was found with Cefexime (87.88%) and Enterococcus with Ampicillin (66.67%) and Staphyllococcus with Cloxacillin (66.67%). The highest susceptibility was for Vancomycin and Ampicillin i.e. 33.33% in each.Conclusion:The findings showed that E. coli isolates were the predominant pathogen and the presence of bacterial isolates with very high resistance to the commonly prescribed drugs. As drug resistance among bacterial pathogens is an evolving process and serious issue. Therefore, routine surveillance and monitoring studies should be conducted to provide physicians knowledge on the updated and most effective empirical treatment of UTIs. Asian Journal of Medical Sciences Vol.7(5) 2016 47-51

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Microbiological Analysis of the Urine Isolates in Kathmandu Medical College Teaching Hospital, Kathmandu, Nepal

Kathmandu University Medical Journal ◽

10.3126/kumj.v9i4.6348 ◽

2012 ◽

Vol 9 (4) ◽

pp. 295-297 ◽

Cited By ~ 5

Author(s):

S Raza ◽

S Pandey ◽

C P Bhatt

Keyword(s):

Urinary Tract ◽

Urinary Tract Infections ◽

Antimicrobial Agents ◽

College Teaching ◽

Urine Samples ◽

Diffusion Method ◽

Microbiological Analysis ◽

Medical College ◽

Antibiotic Susceptibility Test ◽

Tract Infections

Background Urinary tract infections (UTIs) are the common cause of bacterial infection. Recently UTI become more complicated and difficult to treat because of appearance of pathogen with increasing resistance to antimicrobial agents. Objective To determine the etiology of the urinary tract infections and their susceptibility to antimicrobial agents. Methods This study was carried out in Kathmandu Medical College, at department of microbiology. Total 3,460 urine samples were tested microbiologically by standard procedure. Antibiotic susceptibility test was performed for all the isolates by Kirby Bauer disc diffusion method and result was interpreted according to National Committee for Clinical Laboratory Standards (NCCLS) guide line. Results Out of 3,460 urine samples 680 (19.7%) showed the significant bacteriuria. The most common pathogens isolated were Escherichia coli 75.7% followed by Klebsiella pneumoniae 10.7%, Acinetobacter spp 5.5%, Proteus spp 3.5% and Pseudomonas aeruginosa 1.2%. Most susceptible antibiotic was Amikacin, Ceftriaxone and Ciprofloxacin for most of the isolates. E. coli which was the main isolate was found to be most susceptible to Amikacin 96.1%, Nitrofurantoin 91.3% and Gentamicin 77.7% followed by Ceftriaxone 65.8% and Ciprofloxacin 64.1%. ConclusionRegular surveillance of the resistance rate among uro-pathogens is needed to ensure the appropriate therapy of UTI.DOI: http://dx.doi.org/10.3126/kumj.v9i4.6348 Kathmandu Univ Med J 2011;9(4):295-7

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Prevalence and Antibiogram Assessment of Staphylococcus aureus in Beef at Municipal Abattoir and Butcher Shops in Addis Ababa, Ethiopia

BioMed Research International ◽

10.1155/2018/5017685 ◽

2018 ◽

Vol 2018 ◽

pp. 1-7 ◽

Cited By ~ 4

Author(s):

Feben Adugna ◽

Mahendra Pal ◽

Gebrerufael Girmay

Keyword(s):

Staphylococcus Aureus ◽

Susceptibility Testing ◽

Preventive Measures ◽

Addis Ababa ◽

Cross Sectional Study ◽

Cross Sectional ◽

Systematic Random Sampling ◽

Beef Carcasses ◽

Antibiotic Susceptibility Test ◽

Butcher Shops

Objective. A cross-sectional study was conducted from October 2013 to April 2014 to determine the prevalence and antibiotic resistance of Staphylococcus aureus from beef of Addis Ababa Abattoir and butcher shops in Addis Ababa. Seven hundred sixty-eight swab samples were taken from the abattoir and butcher carcasses using a systematic random sampling. One hundred twenty swab samples were also taken from hooks, cutting tables, and knives from the abattoir. Staphylococcus aureus positive isolates were taken for antibiotic susceptibility test. A questionnaire survey was conducted in the abattoir and butcher workers to assess the hygienic practice and possible risk factors regarding the contamination of meat. Results. The prevalence of S. aureus in the abattoir, butcher, cutting table, hook, and knife was 9.4%, 19.8%, 15%, 15%, and 22.5%, respectively. The prevalence of S. aureus in the knife and butcher was found to be 2.8 (OR = 2.8, CI = 1.2–6.4) and 2.4 (OR = 2.4, CI = 1.6–3.6) times that of the abattoir results (p<0.01). The antimicrobial susceptibility testing was also conducted on 133 isolates of S. aureus using the disc diffusion susceptibility method. Bacitracin, neomycin, and methicillin were found to be 100% resistant to S. aureus. To avoid the presence of pathogenic Staphylococcus isolates, preventive measures using good hygienic practices during slaughtering and handling of the beef carcasses are recommended.

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Detection of the Antiseptic Resistance Gene among Pseudomonas aeruginosa Isolates

Iraqi Journal of Science ◽

10.24996/ijs.2021.62.1.7 ◽

2021 ◽

pp. 75-82

Author(s):

اخلاص نعمة

Keyword(s):

Pseudomonas Aeruginosa ◽

Antibiotic Susceptibility ◽

Antimicrobial Agents ◽

Opportunistic Pathogen ◽

Susceptibility Test ◽

Diffusion Method ◽

Bacterial Isolates ◽

Disk Diffusion Method ◽

Antibiotic Susceptibility Test ◽

Antibiotics Susceptibility

Pseudomonas aeruginosa is an opportunistic pathogen that causes a number of infections in immunocompromised patients. This organism appears to improve resistance to many antimicrobial agents and a high percentage of clinical isolates of P. aeruginosa exhibit multidrug resistance (MDR) phenotype . The purpose of this study is to screen the antibiotic susceptibility patterns and the prevalence of qacE delta1 gene among bacterial isolates. Accordingly, 145 samples were collected from different clinical sources from patients who admitted to different hospitals in Baghdad city in a period ranged 23/8/2018-1/1/2019. The isolates were diagnosed as P. aeruginosa based on routine bacteriological methods and confirmed by a molecular method using 16SrRNA gene. The antibiotic susceptibility test was performed to all identified isolates by Kirby-Bauer Disk Diffusion method using ten types of antibiotics. The results of antibiotics susceptibility test revealed high levels of resistance toward Piperacillin (72.22%), Trimethoprim (68%), Ceftazidime (68%), Colistin (40.28%), and Levofloxacin (33.33%). And , the minimum inhibitory concentration (MIC) of Cetrimide was tested using different concentrations (2.048 to 0.004µg/100µl) and the results showed that MIC values ranged between 2.048 and 0.016) μg/100μL, and the concentration of 0.256 μg/100μl was more frequent . Finally, the prevalence of qacE delta1 gene among bacterial isolates was detected in percentage 63.88% among bacterial isolates .

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Evaluation of Short-Term Exposure to 2.4 GHz Radiofrequency Radiation Emitted from Wi-Fi Routers on the Antimicrobial Susceptibility of Pseudomonas aeruginosa and Staphylococcus aureus

10.31661/gmj.v9i0.1580 ◽

2020 ◽

Vol 9 ◽

pp. 1580 ◽

Cited By ~ 1

Author(s):

Samad Amani ◽

Mohammad Taheri ◽

Mohammad Mehdi Movahedi ◽

Mohammad Mohebi ◽

Fatemeh Nouri ◽

...

Keyword(s):

Staphylococcus Aureus ◽

Pseudomonas Aeruginosa ◽

Antibiotic Susceptibility ◽

Electromagnetic Waves ◽

Bacterial Resistance ◽

Diffusion Method ◽

Short Term ◽

Radiofrequency Radiation ◽

Short Term Exposure ◽

Antibiotic Susceptibility Test

Background: Overuse of antibiotics is a cause of bacterial resistance. It is known that electromagnetic waves emitted from electrical devices can cause changes in biological systems. This study aimed at evaluating the effects of short-term exposure to electromagnetic fields emitted from common Wi-Fi routers on changes in antibiotic sensitivity to opportunistic pathogenic bacteria. Materials and Methods: Standard strains of bacteria were prepared in this study. Antibiotic susceptibility test, based on the Kirby-Bauer disk diffusion method, was carried out in Mueller-Hinton agar plates. Two different antibiotic susceptibility tests for Staphylococcus aureus and Pseudomonas aeruginosa were conducted after exposure to 2.4-GHz radiofrequency radiation. The control group was not exposed to radiation. Results: Our findings revealed that by increasing the duration of exposure to electromagnetic waves at a frequency of 2.4 GHz, bacterial resistance increased against S. aureus and P. aeruginosa, especially after 24 hours (P<0.05). Conclusion: The use of electromagnetic waves with a frequency of 2.4 GHz can be a suitable method for infection control and treatment. [GMJ.2020;9:e1580]

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COLISTIN RESISTANCE IN CARBAPENEM-RESISTANT KLEBSIELLA PNEUMONIAE STRAINS

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2017.v10i9.18369 ◽

2017 ◽

Vol 10 (9) ◽

pp. 70

Author(s):

Beena Hosdurg Bhaskar ◽

Shalini Shenoy Mulki ◽

Sangeeta Joshi ◽

Ranjeeta Adhikari ◽

Bhavana Malavalli Venkatesh

Keyword(s):

Antibiotic Susceptibility ◽

Antimicrobial Agents ◽

Susceptibility Testing ◽

Ethylenediaminetetraacetic Acid ◽

Diffusion Method ◽

Resistance Pattern ◽

Dilution Method ◽

Agar Dilution Method ◽

Antibiotic Susceptibility Testing ◽

Carbapenem Resistant

Objective: There is an increasing use of colistin consequent to increase in the infections caused by carbapenem-resistant Klebsiella pneumoniae.The present study was conducted to determine the minimum inhibitory concentration (MIC) of colistin and the resistance pattern of colistin in carbapenem-resistant K. pneumoniae (CRKP) strains in our intensive care unit (ICU).Methods: Antibiotic susceptibility testing for other antimicrobial agents was done by Kirby-Bauer disk diffusion method. MIC of colistin was determined by agar dilution method. The results of antibiotic susceptibility testing were interpreted as per Clinical Laboratory Standard Institute guidelines 2016 and MIC of colistin were interpreted as per European Committee on Antimicrobial susceptibility testing. The carbapenem resistance was phenotypically detected by modified hodge test and imipenem/imipenem ethylenediaminetetraacetic acid disk method.Results: Out of 518 K. pneumoniae, 329 were resistant to carbapenems, and 91 isolates showed resistance to colistin. The MIC of colistin ranged between 4 and >512 ug/ml and MIC90 was 16 ug/L and MIC50 was 4 ug/ml. A majority of the colistin-resistant isolates were found in multidisciplinary ICU (85/91).Conclusion: The emergence of colistin-resistant strains is a major problem due to limited treatment options for infections caused by CRKP carbapenemase producing K. pneumoniae. Colistin should not be used alone, combination therapy should be preferred.

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Phenotypic study of Macrolide-Lincosamide-Streptogramin B Resistance in Staphylococcus aureus and their relationship with Methicillin-Resistant Staphylococcus aureus (MRSA) at Tertiary Care in Eastern Nepal

Journal of Nobel Medical College ◽

10.3126/jonmc.v5i1.15745 ◽

2016 ◽

Vol 5 (1) ◽

pp. 1-5 ◽

Cited By ~ 2

Author(s):

Ganesh Kumar Singh ◽

Bigu Kumar Chaudhari ◽

Kamal Prasad Parajuli

Keyword(s):

Staphylococcus Aureus ◽

Antimicrobial Agents ◽

Methicillin Resistant Staphylococcus Aureus ◽

Tertiary Care ◽

Diffusion Method ◽

Clinical Samples ◽

Methicillin Resistant ◽

Inducible Clindamycin Resistance ◽

Constitutive Resistance ◽

Antibiotic Susceptibility Test

Background Resistance to antimicrobial agents is prevalent among Staphylococci. This has led to wide uses of macrolide-lincosamide-streptogramin B (MLSB) antibiotics to Staphylococcus aureus (S. aureus) infections. MLSB though chemically distinct, have similar target site and mode of action. The multiple mechanisms are responsible for resistance to MLSB antibiotics which can lead to clinical failure. The aim of the study was to investigate the frequency of inducible and constitutive clindamycin resistance among clinical isolates of S. aureus and their relationship with Methicillin-resistant Staphylococcus aureus (MRSA).Material & Methods A total of 336 unique Staphylococcus aureus isolates from different clinical samples obtained from patients were studied. Antibiotic susceptibility test was performed by Kirby- Bauer disc diffusion method. “D test” was performed to detect inducible clindamycin resistance as per CLSI guidelines. MRSA was detected using Cefoxitin (30μg) and results were interpreted according to CLSI criteria.Results Inducible clindamycin resistance was seen in 45 (13.39%), constitutive clindamycin resistance was seen among 58 (17.26%) while MS phenotype was observed among 38(11.30%) of isolates. Inducible resistance as well as constitutive resistance was higher among MRSA as compared to MSSA (21.11%, 4.48% and 21.11%, 12.82%respectively).Conclusion The Successful use of clindamycin for the treatment of infection caused by S. aureus can be predicted based on the result of simple and inexpensive D test.Journal of Nobel Medical CollegeVolume 5, Number 1, Issue 8, January-July 2016, 1-5

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Antibiotic Profile of Staphylococcus aureus on Table Eggs from Ezrad Farms in Iwo Area of Osun State

International Journal of Pathogen Research ◽

10.9734/ijpr/2019/v3i130083 ◽

2019 ◽

pp. 1-12

Author(s):

Famubo, Joseph A. ◽

Oladunjoye, Bunmi B. ◽

Ogunfowora, Vitoria O.

Keyword(s):

Staphylococcus Aureus ◽

High Resistance ◽

Health Problem ◽

Antibiotic Susceptibility ◽

Diffusion Method ◽

Disc Diffusion ◽

Disc Diffusion Method ◽

Mannitol Salt Agar ◽

Aureus Isolate ◽

Antibiotic Susceptibility Test

Surface swabs of the table eggs were carried out using sterile swab sticks. These were inoculated on Mannitol Salt Agar and incubated at 37°C for 24 hours. The isolates obtained were morphologically and biochemically characterized. 62% of the isolates obtained were identified as Staphylococcus aureus. 0.5 McFarland standard of each Staphylococcus aureus isolate was subjected to antibiotic susceptibility test on Muller Hinton Agar using the disc diffusion method. Antibiotic susceptibility was determined by observing and measuring clear zones in millimetres. The antibiogram pattern of Staphylococcus aureus on the surface of table eggs from Ezrad farms located in Iwo, Osun State was investigated. Staphylococcus aureus isolates were 100% resistant to Augmentin and Cloxacillin while resistance to Ceftazidime, Erythromycin, Gentamycin, Ofloxacin, Cefuroxime and Ceftriaxone were at 96%, 89%, 86%, 82%, 75% and 57% respectively. This study shows high resistance of Staphylococcus aureus isolated from eggshells to antibiotics which could pose a serious health problem.

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