scholarly journals Lower Respiratory Tract Pathogens and Their Antimicrobial Susceptibility Pattern: A 5-Year Study

Antibiotics ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 851
Author(s):  
Biagio Santella ◽  
Enrica Serretiello ◽  
Anna De Filippis ◽  
Folliero Veronica ◽  
Domenico Iervolino ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Klebsiella Pneumoniae ◽  
Respiratory Tract ◽  
Antimicrobial Susceptibility ◽  
Lower Respiratory Tract ◽  
Susceptibility Testing ◽  
Gram Negative Bacteria ◽  
Susceptibility Pattern ◽  
Gram Negative

Lower respiratory tract infections (LRTIs) are the most common infections in humans. It is estimated that 2.74 million deaths worldwide occur each year due to LRTIs. The aim of the study was to determine the frequency and antibiotic susceptibility pattern of microorganisms isolated from respiratory samples of patients with LRTIs. Between January 2015 and December 2019, a total of 7038 sputum and bronchoaspirate samples from suspected LRTI patients were collected. Among them, 2753 samples (39.1%) showed significant microbial growth on culture media. The LRTI rate was higher in patients with male gender (67.1%) and with age between 40–59 years (48.6%). The microorganism identification and antibiotic susceptibility testing were performed with Vitek 2. Out of 4278 isolates species, 3102 (72.5%) were Gram-negative bacteria, 1048 (24.5%) were Gram-positive bacteria, and 128 (3.0%) were Candida spp. Major microorganisms isolated were Acinetobacter baumannii (18.6%), Staphylococcus aureus (15.2%), Pseudomonas aeruginosa (14.2%), and Klebsiella pneumoniae (10.9%). In antimicrobial susceptibility testing, Staphylococcus aureus isolates were mostly resistant to Penicillin G (84.1%) and Oxacillin (48.1%), whereas they demonstrated maximum sensitivity to Tigecycline (100%) and Linezolid (99.5%). Among Gram-negative isolates, Acinetobacter baumannii showed maximum sensitivity to Colistin but was resistant to other antibiotics (95–99%). Klebsiella pneumoniae isolates were mostly resistant to Cefotaxime (72.7%) and sensitive to Gentamicin (54.3%), and Pseudomonas aeruginosa was resistant to Ciprofloxacin (40.3%) and sensitive to Amikacin (85.9%). Gram-negative bacteria represented the species most commonly isolated. A high rate of antimicrobial resistance was observed in this study. In conclusion, the correct identification of causative microorganisms and their susceptibility patterns to antibiotics is crucial for choosing targeted and effective antibiotic therapy in LRTIs, and to prevent the emergence of multidrug-resistant bacteria.

scholarly journals Susceptibility of Multiresistant Gram-Negative Bacteria to Fosfomycin and Performance of Different Susceptibility Testing Methods

2013 ◽  
Vol 58 (3) ◽  
pp. 1763-1767 ◽  
Author(s):  
L. V. Perdigão-Neto ◽  
M. S. Oliveira ◽  
C. F. Rizek ◽  
C. M. D. M. Carrilho ◽  
S. F. Costa ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Klebsiella Pneumoniae ◽  
Susceptibility Testing ◽  
Gram Negative Bacteria ◽  
Testing Methods ◽  
Gram Negative ◽  
Content Type ◽  
Agar Dilution ◽  
And Performance ◽  
Systemic Infections

ABSTRACTFosfomycin may be a treatment option for multiresistant Gram-negative bacteria. This study compared susceptibility methods using 94 multiresistant clinical isolates. With agar dilution (AD), susceptibilities were 81%, 7%, 96%, and 100% (CLSI) and 0%, 0%, 96%, and 30% (EUCAST), respectively, forAcinetobacter baumannii,Pseudomonas aeruginosa,Klebsiella pneumoniae, andEnterobacterspp. Categorical agreement between Etest and AD forEnterobacteriaceaeandA. baumanniiwas ≥80%. Disk diffusion was adequate only forEnterobacter. CLSI criteria for urine may be adequate for systemic infections.

scholarly journals Bacteriological Profile and Antimicrobial Susceptibility Patterns of Bacteria Isolated from Pus/Wound Swab Samples from Children Attending a Tertiary Care Hospital in Kathmandu, Nepal

2017 ◽  
Vol 2017 ◽  
pp. 1-5 ◽  
Author(s):  
Salu Rai ◽  
Uday Narayan Yadav ◽  
Narayan Dutt Pant ◽  
Jaya Krishna Yakha ◽  
Prem Prasad Tripathi ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Susceptibility ◽  
Gram Negative Bacteria ◽  
Wound Infections ◽  
Gram Negative ◽  
Methicillin Resistant ◽  
Gram Positive Bacteria ◽  
Wound Swab ◽  
Susceptibility Patterns

In Nepal, little is known about the microbiological profile of wound infections in children and their antimicrobial susceptibility patterns. Total of 450 pus/wound swab samples collected were cultured using standard microbiological techniques and the colonies grown were identified with the help of biochemical tests. The antimicrobial susceptibility testing was performed by Kirby-Bauer disc diffusion technique. Methicillin-resistantStaphylococcus aureusisolates were detected by using cefoxitin disc and confirmed by determining minimum inhibitory concentrations (MIC) of oxacillin. 264 (59%) samples were culture positive. The highest incidence of bacterial infections was noted in the age group of less than 1 year (76%). Out of 264 growth positive samples, Gram-positive bacteria were isolated from 162 (61%) samples and Gram-negative bacteria were found in 102 (39%) samples.Staphylococcus aureus(99%) was the predominant Gram-positive bacteria isolated andPseudomonas aeruginosa(44%) was predominant Gram-negative bacteria. About 19% ofS. aureusisolates were found to be methicillin-resistant MIC of oxacillin ranging from 4 μg/mL to 128 μg/mL. Among the children of Nepal, those of age less than 1 year were at higher risk of wound infections by bacteria.Staphylococcus aureusfollowed byPseudomonas aeruginosawere the most common bacteria causing wound infections in children.

scholarly journals Evaluation of Antimicrobial Susceptibility Pattern of Pathogenic Bacteria Causing Urinary Tract Infection in A Teaching Hospital

2021 ◽  
Vol 10 (9) ◽  
pp. 456-463
Author(s):  
Pradha Velu Ramya Rengaraj ◽  
Hemalatha Gurumurthy Saleem Mohamed Ali
Keyword(s):  
Staphylococcus Aureus ◽  
Urinary Tract ◽  
Teaching Hospital ◽  
Antimicrobial Susceptibility ◽  
Pathogenic Bacteria ◽  
Susceptibility Testing ◽  
Susceptibility Pattern ◽  
Gram Negative ◽  
Antimicrobial Susceptibility Pattern ◽  
Klebsiella Spp

Aims: To determine the prevalence of pathogenic bacteria causing urinary tract infections and their antibiotics susceptibility pattern from patients reporting in a tertiary care teaching hospital. Study design: Retrospective study. Place and duration of the study: Melmaruvathur Adhiparasakthi Institute of Medical Sciences and Research, January 2017 to December 2019. Methodology: 7825Mid-stream urine (MSU) samples collected for culture and sensitivity testing, sent to the laboratory during the period of study were included in this study. The samples were inoculated onto blood agar and MacConkey agar, incubated at 37°C for 24 hours. Identification of organisms by biochemical tests and antibiotic susceptibility testing were done by standard microbiological methods. Results: Out of 7825 samples, 3832 showed significant bacteriuria, of which 50% (1924/3832) were females. Escherichia coli was the most common pathogen isolated, which accounts for 41% followed by Klebsiella spp. (27%), Staphylococcus aureus (7%), Proteus spp. (7%), Acinetobacter spp. (5%), Pseudomonas spp. (4%), Enterobacter spp. (4%), Citrobacter spp.(4%), and Serratia spp. (0.9%). The antimicrobial susceptibility testing of Staphylococcus aureus showed 33% were Methicillin Resistant Staphylococcus aureus. The antimicrobial susceptibility pattern of gram negative bacilli showed high resistance to cephalosporins followed by carbapenems. Among gram negative bacilli, Klebsiella spp. showed 36% extended spectrum beta lactamases (ESBL) production. Conclusions: This study determines the trends in antimicrobial sensitivity patterns of uropathogens. It is helpful in the formulation of local antibiotic policy for the hospital and assist clinicians in the rational choice of antibiotic therapy to prevent misuse or overuse of antibiotics so as to prevent emergence of multi drug resistant pathogens.

scholarly journals Cystic fibrosis pathogens survive for extended periods within cough-generated droplet nuclei

Thorax ◽  
2018 ◽  
Vol 74 (1) ◽  
pp. 87-90 ◽  
Author(s):  
Michelle E Wood ◽  
Rebecca E Stockwell ◽  
Graham R Johnson ◽  
Kay A Ramsay ◽  
Laura J Sherrard ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Cross Sectional Study ◽  
Gram Negative Bacteria ◽  
Sectional Study ◽  
Bacterial Strains ◽  
Cross Sectional ◽  
Gram Negative ◽  
Droplet Nuclei

The airborne route is a potential pathway in the person-to-person transmission of bacterial strains among cystic fibrosis (CF) populations. In this cross-sectional study, we investigate the physical properties and survival of common non-Pseudomonas aeruginosa CF pathogens generated during coughing. We conclude that Gram-negative bacteria and Staphylococcus aureus are aerosolised during coughing, can travel up to 4 m and remain viable within droplet nuclei for up to 45 min. These results suggest that airborne person-to-person transmission is plausible for the CF pathogens we measured.

scholarly journals National Surveillance of Antimicrobial Susceptibility of Bacteremic Gram-Negative Bacteria with Emphasis on Community-Acquired Resistant Isolates: Report from the 2019 Surveillance of Multicenter Antimicrobial Resistance in Taiwan (SMART)

2020 ◽  
Vol 64 (10) ◽  
Author(s):  
Po-Yu Liu ◽  
Yu-Lin Lee ◽  
Min-Chi Lu ◽  
Pei-Lan Shao ◽  
Po-Liang Lu ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Resistance ◽  
Klebsiella Pneumoniae ◽  
Gram Negative Bacteria ◽  
National Surveillance ◽  
Gram Negative ◽  
Content Type ◽  
E Coli ◽  
Carbapenem Resistant

ABSTRACT A multicenter collection of bacteremic isolates of Escherichia coli (n = 423), Klebsiella pneumoniae (n = 372), Pseudomonas aeruginosa (n = 300), and Acinetobacter baumannii complex (n = 199) was analyzed for susceptibility. Xpert Carba-R assay and sequencing for mcr genes were performed for carbapenem- or colistin-resistant isolates. Nineteen (67.8%) carbapenem-resistant K. pneumoniae (n = 28) and one (20%) carbapenem-resistant E. coli (n = 5) isolate harbored blaKPC (n = 17), blaOXA-48 (n = 2), and blaVIM (n = 1) genes.

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