scholarly journals Evaluation the Effect of Microwave Radiation on Gram Positive and Negative Bacteria

2021 ◽  
Vol 2 (1) ◽  
pp. 39-45
Author(s):  
Esam Yahya ◽  
Ali M Almashgab ◽  
Muhanad Abdullah Abdulsamad ◽  
Abdulmutalib Alabeed Allaq ◽  
Amaal Mohammed Alqadhi ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Thermal Effect ◽  
Microwave Treatment ◽  
Microwave Oven ◽  
Bacterial Suspension ◽  
Gram Positive ◽  
Strong Activity ◽  
Complete Inactivation ◽  
Before And After

Using microwave oven nowadays has become necessary due to the need for speed in our daily activities. It is widely used in hating, thawing, and even cooking of food. It has been also used in sterilization and decontamination of food from microorganisms. This study aimed to evaluate thermal and non-thermal effect of a regular house holding microwave oven on Staphylococcus aureus and Escherichia coli. Bacterial suspension is exposed to microwave radiations in different strength and durations and compared to unexposed cultures. During microwave treatment, non-thermal effect is evaluated by putting the suspension crushed ice. The results indicate that the viability of both gram positive and negative was highly reduced with thermal effect of microwave radiations, leading to complete inactivation at three minutes. Non-thermal microwave radiations were also able to cause change in the microbial viability of both tested organisms on at least two-exposure occasion. The evaluation of antibiotic susceptibility before and after microwave radiations treatment indicate that antibiotic resistance was highly increased to tested antibiotics specially after three-minute exposure, except for Staphylococcus aureus to Amoxicillin, which became more sensitive. Microwave radiations reported to have a strong activity in eliminating the number of microbes but, it may have an important role in development of antibiotic resistance that should not be ignored.

scholarly journals Two Novel Semisynthetic Lipoglycopeptides Active against Staphylococcus aureus Biofilms and Cells in Late Stationary Growth Phase

2021 ◽  
Vol 14 (11) ◽  
pp. 1182
Author(s):  
Vladimir Vimberg ◽  
Leona Zieglerova ◽  
Aninda Mazumdar ◽  
Zsolt Szűcs ◽  
Aniko Borbás ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Growth Phase ◽  
Stationary Growth Phase ◽  
Glycopeptide Antibiotics ◽  
Stationary Growth ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
New Antibiotics

The increase in antibiotic resistance among Gram-positive bacteria underscores the urgent need to develop new antibiotics. New antibiotics should target actively growing susceptible bacteria that are resistant to clinically accepted antibiotics including bacteria that are not growing or are protected in a biofilm environment. In this paper, we compare the in vitro activities of two new semisynthetic glycopeptide antibiotics, MA79 and ERJ390, with two clinically used glycopeptide antibiotics—vancomycin and teicoplanin. The new antibiotics effectively killed not only exponentially growing cells of Staphylococcus aureus, but also cells in the stationary growth phase and biofilm.

scholarly journals Anti-staphylococcal activity and mode of action of thioridazine photoproducts

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Tatiana Tozar ◽  
Sofia Santos Costa ◽  
Ana-Maria Udrea ◽  
Viorel Nastasa ◽  
Isabel Couto ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Molecular Docking ◽  
Infectious Diseases ◽  
Molecular Mechanisms ◽  
Dynamic Surface Tension ◽  
Docking Studies ◽  
Gram Positive ◽  
Dynamic Surface ◽  
Gram Positive Bacteria

Abstract Antibiotic resistance became an increasing risk for population health threatening our ability to fight infectious diseases. The objective of this study was to evaluate the activity of laser irradiated thioridazine (TZ) against clinically-relevant bacteria in view to fight antibiotic resistance. TZ in ultrapure water solutions was irradiated (1–240 min) with 266 nm pulsed laser radiation. Irradiated solutions were characterized by UV–Vis and FTIR absorption spectroscopy, thin layer chromatography, laser-induced fluorescence, and dynamic surface tension measurements. Molecular docking studies were made to evaluate the molecular mechanisms of photoproducts action against Staphylococcus aureus and MRSA. More general, solutions were evaluated for their antimicrobial and efflux inhibitory activity against a panel of bacteria of clinical relevance. We observed an enhanced antimicrobial activity of TZ photoproducts against Gram-positive bacteria. This was higher than ciprofloxacin effects for methicillin- and ciprofloxacin-resistant Staphylococcus aureus. Molecular docking showed the Penicillin-binding proteins PBP3 and PBP2a inhibition by sulforidazine as a possible mechanism of action against Staphylococcus aureus and MRSA strains, respectively. Irradiated TZ reveals possible advantages in the treatment of infectious diseases produced by antibiotic-resistant Gram-positive bacteria. TZ repurposing and its photoproducts, obtained by laser irradiation, show accelerated and low-costs of development if compared to chemical synthesis.

scholarly journals Microbial Aetiology, Antibiotic Susceptibility and Pathogen-Specific Risk Factors for Udder Pathogens from Clinical Mastitis in Dairy Cows

Animals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 2113
Author(s):  
Anna Duse ◽  
Karin Persson-Waller ◽  
Karl Pedersen
Keyword(s):  
Risk Factors ◽  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Dairy Cows ◽  
Antibiotic Susceptibility ◽  
Clinical Mastitis ◽  
Gram Positive ◽  
E Coli ◽  
Trueperella Pyogenes ◽  
Klebsiella Spp

Mastitis is one of the most important infectious diseases and one of the diseases that causes the greatest use of antibiotics in dairy cows. Therefore, updated information on the bacteria that cause mastitis and their antibiotic susceptibility properties is important. Here, for the first time in over 10 years, we updated the bacterial findings in clinical mastitis in Swedish dairy cows together with their antibiotic resistance patterns and risk factors for each bacterial species. During the period 2013–2018, samples from clinical mastitis were collected, together with information on the cows and herds of origin. The samples were cultured, and a total of 664 recovered bacterial isolates were subjected to susceptibility testing. Staphylococcus aureus (S. aureus) was the most common pathogen and accounted for 27.8% of diagnoses, followed by Streptococcus dysgalactiae (S. dysgalactiae) (15.8%), Escherichia coli (E. coli) (15.1%), Streptococcus uberis (S. uberis) (11.4%), Trueperella pyogenes (T. pyogenes) (7.7%), non-aureus staphylococci (NAS) (2.8%), Klebsiella spp. (2.7%), Enterococcus spp. (1.3%), and Streptococcus agalactiae (S. agalactiae) (1.2%). Various other bacteria accounted for 2.6%. Staphylococci were, in general, susceptible to most antibiotics, but 2.6% of S. aureus and 30.4% of NAS were resistant to penicillin. No methicillin-resistant staphylococci were found. All S. agalactiae were susceptible to penicillin. Bimodal and trimodal MIC distributions for penicillin in S. dysgalactiae and S. uberis, respectively, indicate acquired reduced susceptibility in some isolates. The mostly unimodal MIC distributions of T. pyogenes indicate that acquired resistance does usually not occur in this species. Among E. coli, 14.7% were resistant to at least one antibiotic, most often ampicillin (8.7%), streptomycin (7.8%), or sulphamethoxazole (6.9%). Klebsiella spp. had low resistance to tetracycline (9.1%) but is considered intrinsically resistant to ampicillin. Pathogen-specific risk factors were investigated using multivariable models. Staphylococcus aureus, S. dysgalactiae, and T. pyogenes were more common, while E. coli was less common in quarters with more than one pathogen. S. aureus and T. pyogenes were mostly seen in early lactation, while E. coli was more common in peak to mid lactation and S. dysgalactiae in early to peak lactation. Trueperella pyogenes and Klebsiella spp. were associated with a previous case of clinical mastitis in the current lactation. Staphylococcus aureus was associated with tie stalls and T. pyogenes with loose housing. All pathogens except E. coli and S. dysgalactiae had a seasonal distribution. In conclusion, the aetiological agents for clinical bovine mastitis have remained relatively stable over the last 10–15 years, S. aureus, S. dysgalactiae, E. coli and S. uberis being the most important. Resistance to penicillin among Gram-positive agents was low, and in general, antibiotic resistance to other compounds was low among both Gram-positive and Gram-negative agents.

scholarly journals Activity of a New Oral Streptogramin, XRP2868, against Gram-Positive Cocci Harboring Various Mechanisms of Resistance to Streptogramins

2006 ◽  
Vol 50 (1) ◽  
pp. 237-242 ◽  
Author(s):  
Michel Dupuis ◽  
Roland Leclercq
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Bactericidal Effect ◽  
The Other ◽  
Mechanisms Of Resistance ◽  
Coagulase Negative Staphylococci ◽  
Gram Positive ◽  
Strong Activity ◽  
Factor B ◽  
Gram Positive Cocci

ABSTRACT The antibacterial activity of XRP2868, a new oral streptogramin composed of a combination of RPR132552 (streptogramin A) and RPR202868 (streptogramin B), was evaluated against a collection of clinical gram-positive isolates with characterized phenotypes and genotypes of streptogramin resistance. The effects of genes for resistance to streptogramin A or B on the activity of XRP2868 and its components were also tested by cloning these genes individually or in various combinations in gram-positive recipient strains susceptible to quinupristin-dalfopristin. The species tested included Staphylococcus aureus, coagulase-negative staphylococci, Enterococcus faecalis, Enterococcus faecium, Streptococcus pneumoniae, and other species of streptococci. XRP2868 was generally fourfold more potent than quinupristin-dalfopristin against S. aureus, E. faecium, and streptococci and had activity against E. faecalis (MICs = 0.25 to 1 μg/ml). XRP2868 appeared to be affected by the same mechanisms of resistance as those to quinupristin-dalfopristin. Nevertheless, the strong activity of factor A of the oral streptogramin enabled the combination to be very potent against streptogramin-susceptible staphylococci, streptococci, and E. faecium (MICs = 0.03 to 0.25 μg/ml) and to retain low MICs against the strains harboring a mechanism of resistance to factor A or factor B of the streptogramin. However, the combination of mechanisms of resistance to factors A and B caused an increase in the MICs of XRP2868, which reached 1 to 4 μg/ml. As with the other streptogramins, there was a reduction in the bactericidal effect of XRPR2868 when the staphylococcal strains acquired a constitutively expressed erm gene.

scholarly journals Antibiotic resistance pattern of bacterial isolates retrieved from febrile neutropenic patients with hematological disorders

2020 ◽  
Author(s):  
Gayatri Prajapati ◽  
Bishesh Sharma Poudyal ◽  
Krishna Kumar Maharjan ◽  
Sunita Prajapati ◽  
Janak Raj Dhungana
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Effective Treatment ◽  
Resistance Pattern ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
Hematological Disorders ◽  
Gram Positive Bacteria ◽  
Neutropenic Patients

Abstract Background Antibiotic resistance is nowadays becoming a threat in the treatment of immunosuppressed patients. The aim of this study was to find out the antibiotic resistance pattern of bacteria isolated from febrile neutropenic patients with hematological disorders so that it would help to select the empirical antibiotic for prompt effective treatment of the febrile neutropenic patients. Methods A cross-sectional descriptive study was conducted at a tertiary care hospital of Nepal from October 2018 to November 2019. Blood was drawn aseptically in blood culture bottles. The bacteria were identified by standard microbiological methods with observation of colony morphology, gram staining and biochemical tests of bacteria. The antibiotic susceptibility tests were done by Kirby Bauer disc diffusion method. Extended Spectrum Beta Lactamase (ESBL) and Metallo Beta Lactamase (MBL) producers, and Methicillin Resistant Staphylococcus aureus (MRSA) were detected by phenotypic methods. Results Of the total 214 blood samples, 33.9% (71) yielded the bacterial growth. Gram negative bacteria were isolated from 23.8% of total samples and Gram-positive bacteria were isolated from 9.3% of the total samples. The Gram negative bacteria isolated were Escherichia coli (7.9%), Klebsiella pneumoniae (4.7%), Citrobacter spp. (4.7%), Acinetobacter spp. (3.7%) and Pseudomonas aeruginosa (2.8%). The Gram-positive bacteria isolated were Staphylococcus aureus (5.6%), Coagulase Negative Staphylococcus (2.3%) and Enterococcus spp. (1.4%). About 66.7% of the total Gram-negative bacteria isolated and 50% of the total Gram-positive bacteria were MDR (Multidrug-resistant). About 19.6% of the total Gram-negative bacteria were ESBL producers and 19.6% of them were MBL producers. About 41.6% of Staphylococcus aureus isolated were MRSA (Methicillin Resistant S. aureus). In our institution, piperacillin-tazobactam is the preferred first choice empirical antibiotic. But 58.8% of the Gram negative organisms were found to be resistant towards piperacillin-tazobactam. Hence there is a prompt necessity to switch to another antibiotic with high sensitivity for effective treatment of the febrile neutropenic patients in our institution. Conclusion Antibiotic surveillance data should be evaluated periodically to select the empirical therapeutic antibiotic for effective treatment of febrile neutropenic patients.

scholarly journals Novel Mechanism of Antibiotic Resistance Originating in Vancomycin-Intermediate Staphylococcus aureus

2006 ◽  
Vol 50 (2) ◽  
pp. 428-438 ◽  
Author(s):  
Longzhu Cui ◽  
Akira Iwamoto ◽  
Jian-Qi Lian ◽  
Hui-min Neoh ◽  
Toshiki Maruyama ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Cell Wall ◽  
Antibiotic Resistance ◽  
Bacterial Infections ◽  
Cytoplasmic Membrane ◽  
Resistance Mechanism ◽  
Wall Thickening ◽  
Gram Positive ◽  
Peptidoglycan Biosynthesis ◽  
Significant Public Health

ABSTRACT As an aggressive pathogen, Staphylococcus aureus poses a significant public health threat and is becoming increasingly resistant to currently available antibiotics, including vancomycin, the drug of last resort for gram-positive bacterial infections. S. aureus with intermediate levels of resistance to vancomycin (vancomycin-intermediate S. aureus [VISA]) was first identified in 1996. The resistance mechanism of VISA, however, has not yet been clarified. We have previously shown that cell wall thickening is a common feature of VISA, and we have proposed that a thickened cell wall is a phenotypic determinant for vancomycin resistance in VISA (L. Cui, X. Ma, K. Sato, et al., J. Clin. Microbiol. 41:5-14, 2003). Here we show the occurrence of an anomalous diffusion of vancomycin through the VISA cell wall, which is caused by clogging of the cell wall with vancomycin itself. A series of experiments demonstrates that the thickened cell wall of VISA could protect ongoing peptidoglycan biosynthesis in the cytoplasmic membrane from vancomycin inhibition, allowing the cells to continue producing nascent cell wall peptidoglycan and thus making the cells resistant to vancomycin. We conclude that the cooperative effect of the clogging and cell wall thickening enables VISA to prevent vancomycin from reaching its true target in the cytoplasmic membrane, exhibiting a new class of antibiotic resistance in gram-positive pathogens.

scholarly journals Assessment of the Bacterial Pollution and Detection of Antibiotic Resistance Genes in Benin: Case of the Hydrographic Channel Complex Cotonou-Nokoué Lake

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Oloufemi Daniel Ichola ◽  
Victorien Tamegnon Dougnon ◽  
Charles Hornel Koudokpon ◽  
Alidehou Jerrold Agbankpe ◽  
Esther Deguenon ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Resistance Genes ◽  
Water Samples ◽  
Bacterial Species ◽  
Resistant Bacteria ◽  
Biochemical Tests ◽  
Gram Positive ◽  
Gram Negative ◽  
Gram Positive Cocci

The study aims to document the level of contamination of the aquatic ecosystem of the Cotonou-Lake Nokoué canal hydrographic complex by multidrug-resistant bacteria and their resistance genes. For this purpose, water samples were taken from several points of the complex and from the sediments at the depth of the lake. Samples of several species of freshly caught fish products from the lake were also collected. Bacteriological analyses were carried out according to the AFNOR standard (NF U: 47–100). The identification of the different bacterial species isolated was then carried out using the API 20E gallery and specific biochemical tests. The antibiogram of the strains was performed according to the recommendations of the EUCAST. Molecular characterization of the identified strains was carried out by searching for resistance and virulence genes. The results obtained revealed the presence of several bacterial species in water samples and in sediment and intestine samples of fishery products with a predominance of Gram-negative bacilli. The resistance profile of Gram-negative bacilli showed a total resistance to metronidazole (100%). 23% of the strains were also resistant to ciprofloxacin, 41% to amoxicillin, and 60% to aztreonam. Of the Gram-positive cocci identified, 66% was resistant to vancomycin, 7.5% to ciprofloxacin, 71% to erythromycin, and 22% to tetracycline. Regarding the genes sought, blaTEM (46%), blaSHV (24%), and blaCTX-M-15 (31%) were present in the genome of Gram-negative bacilli as resistance genes and fimH (41%) as virulence gene. As for Gram-positive cocci, the van B gene was completely absent. The van A was present at 6.25% in Staphylococcus aureus and mecA at 21.88 and 33.33%, respectively, in Staphylococcus aureus and coagulase-negative staphylococci strains. The high resistance of isolated bacterial strains is a matter of concern and calls for a rational use of antibiotics in order to avoid the transmission of antibiotic resistance from the environment to humans.

scholarly journals Chemical Synergy between Ionophore PBT2 and Zinc Reverses Antibiotic Resistance

mBio ◽  
2018 ◽  
Vol 9 (6) ◽  
Author(s):  
Lisa Bohlmann ◽  
David M. P. De Oliveira ◽  
Ibrahim M. El-Deeb ◽  
Erin B. Brazel ◽  
Nichaela Harbison-Price ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Global Health ◽  
Antibiotic Treatment ◽  
Acquired Resistance ◽  
Gram Positive ◽  
Antibiotic Resistant ◽  
Content Type ◽  
Antibiotic Development ◽  
Vancomycin Resistant

ABSTRACT The World Health Organization reports that antibiotic-resistant pathogens represent an imminent global health disaster for the 21st century. Gram-positive superbugs threaten to breach last-line antibiotic treatment, and the pharmaceutical industry antibiotic development pipeline is waning. Here we report the synergy between ionophore-induced physiological stress in Gram-positive bacteria and antibiotic treatment. PBT2 is a safe-for-human-use zinc ionophore that has progressed to phase 2 clinical trials for Alzheimer’s and Huntington’s disease treatment. In combination with zinc, PBT2 exhibits antibacterial activity and disrupts cellular homeostasis in erythromycin-resistant group A Streptococcus (GAS), methicillin-resistant Staphylococcus aureus (MRSA), and vancomycin-resistant Enterococcus (VRE). We were unable to select for mutants resistant to PBT2-zinc treatment. While ineffective alone against resistant bacteria, several clinically relevant antibiotics act synergistically with PBT2-zinc to enhance killing of these Gram-positive pathogens. These data represent a new paradigm whereby disruption of bacterial metal homeostasis reverses antibiotic-resistant phenotypes in a number of priority human bacterial pathogens. IMPORTANCE The rise of bacterial antibiotic resistance coupled with a reduction in new antibiotic development has placed significant burdens on global health care. Resistant bacterial pathogens such as methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus are leading causes of community- and hospital-acquired infection and present a significant clinical challenge. These pathogens have acquired resistance to broad classes of antimicrobials. Furthermore, Streptococcus pyogenes, a significant disease agent among Indigenous Australians, has now acquired resistance to several antibiotic classes. With a rise in antibiotic resistance and reduction in new antibiotic discovery, it is imperative to investigate alternative therapeutic regimens that complement the use of current antibiotic treatment strategies. As stated by the WHO Director-General, “On current trends, common diseases may become untreatable. Doctors facing patients will have to say, Sorry, there is nothing I can do for you.”

scholarly journals Antibiotic Sensitivity Test on Staphylococcus Aureus Detected in Sputum of Patients with Pneumonia Treated in Hospitals

2019 ◽  
Vol 5 (1) ◽  
pp. 20
Author(s):  
Dini Agustina ◽  
Diana Chusna Mufida ◽  
Hanifa Rizki A.S. ◽  
Dion Krismashogi Dharmawan
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Antibiotic Sensitivity ◽  
Gram Positive ◽  
Gram Negative ◽  
Mortality Incidence ◽  
Antibiotic Sensitivity Test ◽  
Pulmonary Parenchyma ◽  
Identification Of Bacteria ◽  
Positive Coccus

Pneumonia is a respiratory tract infection that attacks the pulmonary parenchyma. This disease can be caused by bacteria, one of which is Staphylococcus aureus. Antibiotics have an important role to play in reducing the morbidity and mortality incidence of pneumonia, but currently, the incidence of resistance antibiotics is increased. The purpose of this study was to determine the sensitivity of antibiotics Staphylococcus aureus in pneumatic sputum patients. The design of this study was observational descriptive, using sputum samples from pneumonia patients in Subandi and Paru Jember hospitals in November to December 2018. The identification of bacteria in sputum was continued by testing the sensitivity of bacteria to antibiotics. The antibiotics used in this study were chloramphenicol, gentamicin, amikacin, levofloxacin, ampicillin-sulbactam, cotrimoxazole, and ciprofloxacin — data obtained in the frequency distribution table. Of the ten sputum that was successfully cultured, four Gram-negative bacilli bacteria and six Gram-positive coccus bacteria were obtained. The results approved the six Gram-positive coccus bacteria, detected as Staphylococcus aureus. The antibiotic resistance of Staphylococcus aureus to ampicillin-sulbactam was high. Keywords: antibiotic sensitivity, bacteria, pneumonia

scholarly journals Microbes on the Mobile Phones of Healthcare Workers in Palestine: Identification, Characterization, and Comparison

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Mohammad Qadi ◽  
Rasha Khayyat ◽  
Mohammed A. AlHajhamad ◽  
Yazan I. Naji ◽  
Beesan Maraqa ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Antibiotic Resistance ◽  
Mobile Phone ◽  
Mobile Phones ◽  
Healthcare Workers ◽  
Microbial Contamination ◽  
Hospital Environment ◽  
Bacterial Isolates ◽  
Gram Positive ◽  
Gram Negative

Background. Healthcare workers (HCWs) may be using their mobile phones (MPs) to carry microbes that cause hospital-acquired and community infections in general. With antibiotic resistance problem emergence, these infections can be challenging to eradicate. Hence, this study aimed to determine the microbial contamination of HCW MPs and identify and classify bacterial isolates in Palestine. Methods. This was a 7-month comparative cross-sectional analysis of 200 HCW MPs from 2 hospitals and 100 MPs from university students (non-HCWs). Data collection was done using a self-administrated questionnaire, and a swab sample from both HCW and non-HCW MPs was obtained and transferred to An-Najah National University (NNU) microbiology lab for bacterial identification and antibiotic susceptibility. Data were analyzed using Social Sciences Statistical Package (SPSS) version 22.0. Result. Among HCWs, the microbial contamination was 87.5%. Coagulase-negative staphylococci (CoNS; 67.3%), methicillin-sensitive Staphylococcus aureus (MSSA; 17.5%), Gram-positive bacilli (4.1%), methicillin-resistant Staphylococcus aureus (MRSA; 1.6%), and Gram-negative species (1.6%) were the most predominant bacterial isolates. More than half of staphylococci isolates were resistant to penicillin and erythromycin. Male gender, using a mobile phone in the bathroom, and entry to the operating theatre were associated with mobile phone contamination and increased resistance against specific antibiotics. Among non-HCWs, the contamination was 86%. The most predominant bacterial isolates were CoNS, MSSA, and Gram-positive bacilli, with a contamination of 66.8%, 28.5%, and 2.6%, respectively. No MRSA or Gram-negative species were detected in this group. Antibiotic resistance percentage of staphylococci was nearly half of that yielded in the HCW group against each antibiotic. Conclusion. Significant numbers of bacteria have been isolated from HCW MPs. Working in a hospital environment frequently raises the probability of presence of antibiotic-resistant bacteria on a MP. Therefore, infection control teams should discuss methods to prevent the transmission of drug-resistant pathogens from HCW MPs.

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