scholarly journals Bacteriological Identification among Patients Attending at Jimma University Veterinary Clinic

Author(s):  
Gelana Urgesa Ayana ◽  
Boka Tesfaye

Abstract Findings of conducted study showed that the predominant bacteria in Jimma University Veterinary Clinic. Among predominant bacteria identified includes; Escherichia coli 46 (34.3%), Klebsiella 23(17.2%), followed by Staphylococcus aureus 40(29.9%) and Streptococcus spp 25(18.7%). Among 4 species of bacteria isolated, 2 were gram negative and 2 of them was gram positive bacteria. Among the antibiotic susceptibility test, Staphylococcus aureus showed the total resistant on penicillin while tetracycline showed to have the highest sensitivity. Escherichia coli showed the total resistant on gentamicin (100%). Veterinary Clinic is at risk of acquiring bacterial infections due to the presence of mentioned bacteria during this study. The big issue is that these infections resist to antibiotics used in treatment according to results of the study. Health care workers in Veterinary Clinic should improve hygiene to control clinic acquired infections and much attention should be done during diagnosis to improve treatment of patients.

1989 ◽  
Vol 10 (7) ◽  
pp. 306-311 ◽  
Author(s):  
Debra G. Eckert ◽  
N. Joel Ehrenkranz ◽  
Blanca C. Alfonso

AbstractA patient contact model was devised for health care workers (HCWs) to define heavy hand contamination with aerobic gram-negative bacilli (AGNB) that requires alcohol for complete removal. In patients, AGNB quantitation was per ml cup scrub fluid; in HCWs, per ml glove juice. Following 15-second contact, two Proteeae groin carriers yielding ≥ 4 log10AGNB (high burden) transmitted ≥ 3 log10in 67% of 24 tests of six HCWs, and ≤ 2 log10in 29%. Two carriers yielding ≤ 3 log10(low burden) transmitted ≥ 3 log10in 8% and ≤ 2 log10in 38%. At ≤ 2 log10HCW acquisitions, soap eliminated all AGNB in six of seven tests; alcohol in nine of nine (p > 0.05). At ≥ 3 log10acquisitions, soap eliminated all AGNB in three of 10; alcohol in eight of eight Contacteight (p= 0.009). Contact with densely colonized patient skin may cause heavy AGNB contamination of HCWs' hands that generally necessitates alcohol for complete removal.


2020 ◽  
Vol 8 (5) ◽  
pp. 639 ◽  
Author(s):  
Alexis Simons ◽  
Kamel Alhanout ◽  
Raphaël E. Duval

Currently, the emergence and ongoing dissemination of antimicrobial resistance among bacteria are critical health and economic issue, leading to increased rates of morbidity and mortality related to bacterial infections. Research and development for new antimicrobial agents is currently needed to overcome this problem. Among the different approaches studied, bacteriocins seem to be a promising possibility. These molecules are peptides naturally synthesized by ribosomes, produced by both Gram-positive bacteria (GPB) and Gram-negative bacteria (GNB), which will allow these bacteriocin producers to survive in highly competitive polymicrobial environment. Bacteriocins exhibit antimicrobial activity with variable spectrum depending on the peptide, which may target several bacteria. Already used in some areas such as agro-food, bacteriocins may be considered as interesting candidates for further development as antimicrobial agents used in health contexts, particularly considering the issue of antimicrobial resistance. The aim of this review is to present an updated global report on the biology of bacteriocins produced by GPB and GNB, as well as their antibacterial activity against relevant bacterial pathogens, and especially against multidrug-resistant bacteria.


2019 ◽  
Vol 47 (1) ◽  
Author(s):  
Christine Vanlalbiakdiki Sailo ◽  
Puja Pandey ◽  
Subhajit Mukherjee ◽  
Zothan Zami ◽  
Ralte Lalremruata ◽  
...  

Abstract Background The present study attempts to identify and determine the pattern of drug susceptibility of the microorganisms present in mobile phones of health care workers (HCWs) and non-HCWs in a hospital environment. Mobile phones of 100 participants including both genders were randomly swabbed from nine different wards/units and the bacterial cultures were characterized using VITEK 2 system. Results Forty-seven mobile phones were culture positive and a total of 57 isolates were obtained which consisted of 28 Gram-positive organisms and 29 Gram-negative organisms. The predominating organisms were Acinetobacter baumannii and Staphylococcus hominis. Among all the isolates from the mobile phones of HCW and non-HCWs, five isolates had ESBL and three isolates had colistin resistance. Incidentally, MRSA was not found on the mobile phones tested. The isolated organisms showed 100% susceptibility to linezolid, daptomycin, vancomycin, imipenem, meropenem, gentamicin, amikacin, ciprofloxacin and tigecycline, while high resistance was shown against benzylpenicillin (75.0%), cefuroxime and cefuroxime axetil (56.5%). Non-HCWs’ mobile phones were more contaminated as compared to HCWs (P = 0.001) and irrespective of individuals’ gender or toilet habits, both Gram-positive and Gram-negative organisms were present on the mobile phones. Conclusion This study reports for the first time that the mobile phones of non-health care workers harbour more bacterial diversity and are more prone to cause transmission of pathogens. This study can serve to educate the public on personal hand hygiene practices and on maintaining clean mobile phones through antiseptic measures.


1978 ◽  
Vol 148 (5) ◽  
pp. 1228-1240 ◽  
Author(s):  
L H Block ◽  
A Georgopoulos ◽  
P Mayer ◽  
J Drews

A lipid fraction from Escherichia coli was extracted with apolar solvents and was found to protect mice from a number of experimental bacterial infections. The benzoquinone, ubiquinone-8, was isolated from this extract by high pressure liquid chromatography and identified as such by nuclear magnetic resonance and mass spectrometry. At a dose of 25 mg/kg this substance was found to provide complete protection against otherwise lethal infections with gram-negative and gram-positive bacteria in mice. Treatment was most effective when given intravenously 24 h before infection. In comparative studies, ubiquinone-8 had a clearly higher activity than ubiquinones-4, Q6, and Q10. A highly significant increase in the clearance rate of bacteria from the blood by the spleen and the liver of treated animals, correlated well with the protective effect of ubiquinone-8. The compound stimulated the ability of mouse macrophages to incorporate sheep erythrocytes and significantly increased the number of antibody-producing cells in spleens of mice.


2007 ◽  
Vol 30 (9) ◽  
pp. 757-763 ◽  
Author(s):  
J.W. Costerton ◽  
L. Montanaro ◽  
C.r. Arciola

The status of population density is communicated among bacteria by specific secreted molecules, called pheromones or autoinducers, and the control mechanism is called “quorum-sensing”. Quorum-sensing systems regulate the expression of a panel of genes, allowing bacteria to adapt to modified environmental conditions at a high density of population. The two known different quorum systems are described as the LuxR-LuxI system in gram-negative bacteria, which uses an N-acyl-homoserine lactone (AHL) as signal, and the agr system in gram-positive bacteria, which uses a peptide-tiolactone as signal and the RNAIII as effector molecules. Both in gram-negative and in gram-positive bacteria, quorum-sensing systems regulate the expression of adhesion mechanisms (biofilm and adhesins) and virulence factors (toxins and exoenzymes) depending on population cell density. In gram-negative Pseudomonas aeruginosa, analogs of signaling molecules such as furanone analogs, are effective in attenuating bacterial virulence and controlling bacterial infections. In gram-positive Staphylococcus aureus, the quorum-sensing RNAIII-inhibiting peptide (RIP), tested in vitro and in animal infection models, has been proved to inhibit virulence and prevent infections. Attenuation of bacterial virulence by quorum-sensing inhibitors, rather than by bactericidal or bacteriostatic drugs, is a highly attractive concept because these antibacterial agents are less likely to induce the development of bacterial resistance.


Micromachines ◽  
2019 ◽  
Vol 10 (11) ◽  
pp. 770
Author(s):  
SangWook Lee ◽  
Byung Woo Kim ◽  
Hye-Su Shin ◽  
Anna Go ◽  
Min-Ho Lee ◽  
...  

Here, we report a simple and effective method for capturing and displacement of gram-negative bacteria using aptamer-modified microbeads and acoustophoresis. As acoustophoresis allows for simultaneous washing and size-dependent separation in continuous flow mode, we efficiently obtained gram-negative bacteria that showed high affinity without any additional washing steps. The proposed device has a simple and efficient channel design, utilizing a long, square-shaped microchannel that shows excellent separation performance in terms of the purity, recovery, and concentration factor. Microbeads (10 µm) coated with the GN6 aptamer can specifically bind gram-negative bacteria. After incubation of bacteria culture sample with aptamer affinity bead, gram-negative bacteria-bound microbeads, and other unbound/contaminants can be separated by size with high purity and recovery. The device demonstrated excellent separation performance, with high recovery (up to 98%), high purity (up to 99%), and a high-volume rate (500 µL/min). The acoustophoretic separation performances were conducted using 5 Gram-negative bacteria and 5 Gram-positive bacteria. Thanks to GN6 aptamer’s binding affinity, aptamer affinity bead also showed binding affinity to multiple strains of gram-negative bacteria, but not to gram-positive bacteria. GN6 coated bead can capture Gram-negative bacteria but not Gram-positive bacteria. This study may present a different perspective in the field of early diagnosis in bacterial infectious diseases. In addition to detecting living bacteria or bacteria-derived biomarkers, this protocol can be extended to monitoring the contamination of water resources and may aid quick responses to bioterrorism and pathogenic bacterial infections.


Antibiotics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 36 ◽  
Author(s):  
Andrea Vila Domínguez ◽  
Rafael Ayerbe Algaba ◽  
Andrea Miró Canturri ◽  
Ángel Rodríguez Villodres ◽  
Younes Smani

Due to the emergence of antimicrobial resistance, new alternative therapies are needed. Silver was used to treat bacterial infections since antiquity due to its known antimicrobial properties. Here, we aimed to evaluate the in vitro activity of colloidal silver (CS) against multidrug-resistant (MDR) Gram-negative and Gram-positive bacteria. A total of 270 strains (Acinetobacter baumannii (n = 45), Pseudomonas aeruginosa (n = 25), Escherichia coli (n = 79), Klebsiella pneumoniae (n = 58)], Staphylococcus aureus (n = 34), Staphylococcus epidermidis (n = 14), and Enterococcus species (n = 15)) were used. The minimal inhibitory concentration (MIC) of CS was determined for all strains by using microdilution assay, and time–kill curve assays of representative reference and MDR strains of these bacteria were performed. Membrane permeation and bacterial reactive oxygen species (ROS) production were determined in presence of CS. CS MIC90 was 4–8 mg/L for all strains. CS was bactericidal, during 24 h, at 1× and 2× MIC against Gram-negative bacteria, and at 2× MIC against Gram-positive bacteria, and it did not affect their membrane permeabilization. Furthermore, we found that CS significantly increased the ROS production in Gram-negative with respect to Gram-positive bacteria at 24 h of incubation. Altogether, these results suggest that CS could be an effective treatment for infections caused by MDR Gram-negative and Gram-positive bacteria.


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