Showing 4 results for Enterobacter
Sh Shabani, Ar Sadeghi Mahoonak, H Jalali,
Volume 8, Issue 2 (7-2014)
Abstract
Abstract
Background and Objective: Cream pastry, because of their ingredients, making process and preserving conditions are susceptible to many types of microbes. This study was conducted to determine the level of contamination of pastry cream in Gorgan.
Material and Methods: The randomly selected samples (N = 450) were tested according to national standards for microbial tests and then the data was analyzed.
Results: The level of contaminations for Enterobacteriaceae and Staphylococcus aureus was 56% and 43.3%, respectively. The highest contamination occurred in summer with Enterobacteriaceae (N= 113) and the lowest in spring with Staphylococcus aureus (N= 40). Also microbial contamination in different types of cream pastries showed the maximum level in cream puff (90%) and the minimum level in roll pastry (30.6%).
Conclusion: There is a significant difference in infection rate between different samples. The infection rate in this study is more than the prevalence of past studies.
Keywords: Cream Pastry, Enterobacteriaceae, Staphylococcusaureus, Gorgan
Azizollah Ebrahimi Kahrizsangi , Saied Habibian Dehkordi , Ziba Shabanpur, Reza Hakimi Alni , Majid Hemati,
Volume 10, Issue 6 (11-2016)
Abstract
ABSTRACT
Background and Objective: Biofilms are community of bacteria that attach to inanimate surfaces or living tissues via production of extracellular polymers and exopolysaccharide matrix. Microbial biofilms on various surfaces of the hospital environment are considered as a reservoir of infection spread. The present study aimed to evaluate the disinfecting effect of benzalkonium chloride on some bacterial isolates causing nosocomial infections.
Methods: First, 13 isolates from four bacteria including Pseudomonas aeruginosa, Staphylococcus aureus, Acinetobacter and Enterobacter were obtained from Microbiology Laboratory of Al-Zahra Hospital in Isfahan, Iran. The samples were transferred to Microbiology Laboratory of Faculty of Veterinary Medicine of Shahrekord University for testing. Evaluation of biofilm formation and determination of minimum inhibitory concentration (MIC) of the disinfectant and effect of the disinfectant on planktonic growth and biofilm formation were performed.
Results: All bacterial isolates (52 cases) produced biofilm. Mean MIC of benzalkonium chloride for P. aeruginosa, S. aureus, Enterobacter and Acinetobacter was 0.14, 0.2, 0.18, 0.17 g/ml, respectively. Planktonic growth of all four bacteria was inhibited at concentrations of 2MIC, MIC and 1/2MIC. Biofilm was not produced in MIC and 2MIC concentrations, and biofilm formation capability increased by reducing the concentration of benzalkonium chloride.
Conclusion: The results show that the use of appropriate concentration of benzalkonium chloride can prevent the growth of different bacterial species, but sub-MIC dose of this disinfectant may stimulate biofilm formation.
Keywords: Biofilm, Benzalkonium Chloride, Pseudomonas Aeruginosa, Staphylococcus Aureus, Enterobacter, Acinetobacter.
Bhawana Bajare, Akanksha Dhangar, Supriya Tankhiwale, Sunanda Shrikhande,
Volume 18, Issue 2 (3-2024)
Abstract
Background: Pyogenic infection is a significant cause of morbidity. Infection with multidrug-resistant strains poses a major difficulty in the treatment. The study was conducted to know the bacteriological profile of pyogenic infections and their antibiotic susceptibility.
Methods: A cross-sectional study was conducted in a tertiary care hospital from October 2021 to March 2022. Isolates from pus specimens were subjected to an antibiotic sensitivity test using the Kirby-Bauer method as per CLSI 2021.
Results: Out of 752 samples, etiology could be revealed in 510 (68.4%) specimens. Enterobacterales dominated the profile, with K pneumoniae isolated in the maximum number of specimens. Staphylococcus aureus was the culprit in 14% of the cases. Non-fermenters were isolated in 17% of the cases. Methicillin resistance in S aureus was 67%. Gram-positive cocci showed high sensitivity to linezolid. For both Piptaz and carbapenem, Enterobacterales and non-fermenters showed around 50% and 60% susceptibility, respectively.
Conclusion: Continuous surveillance of the aetiologic agents of pyogenic infections and their antibiotic sensitivity pattern needs to be done to design and implement the antibiotic policy for the infection in our set-up.
Maryam Rezaeian, Laleh Hoveida,
Volume 19, Issue 1 (4-2025)
Abstract
Background: Infections caused by bacteria transmitted from food, including Enterobacteriaceae, Pseudomonas aeruginosa (P. aeruginosa), and Acinetobacter baumannii (A. baumannii) resistant to carbapenems, are spreading, and this has caused concerns in the field of treatment. This study investigated the frequency of carbapenem resistance genes in Enterobacteriaceae, P. aeruginosa, and A. baumannii isolated from raw chicken meat.
Method: In this cross-sectional study, 100 samples of raw chicken meat were collected from Isfahan. Bacterial infection was evaluated and confirmed using biomedical tests. Antibiotic sensitivity tests were performed using disc diffusion for Enterobacteriaceae, P. aeruginosa, and Acinetobacter baumannii isolates. The frequency of genes encoding resistance to carbapenems (OXA-181, OXA-48, VIM, NDM, IMP, and KPC) was determined through polymerase chain reaction (PCR) analysis.
Results: Out of 100 samples, 70 were positive for bacterial infection, of which 30 were infected with Escherichia coli (E. coli), 14 samples with Klebsiella pneumoniae (K. pneumoniae), 9 samples with Salmonella typhimurium (S. typhimurium), 11 samples with P. aeruginosa, and 6 samples were infected with A. baumannii. The highest amount of antibiotic resistance was estimated to be tetracycline, cotrimoxazole, gentamicin, trimethoprim, and streptomycin, and the lowest amount was azithromycin and rifampin. Among genes encoding resistance to carbapenem, NDM and OXA-48 genes were the most commonly expressed, with a frequency of 60% and 28.24%, respectively.
Conclusion: The study found significant bacterial contamination, especially for Enterobacteriaceae, with notable antibiotic resistance to tetracycline. Carbapenem resistance genes NDM and OXA-48 were prevalent, indicating the urgency of addressing antibiotic resistance.
