Relation between the faecal concentration of various potentially pathogenic microorganisms and infections in individuals (mice) with severely decreased resistance to infection

1978 ◽  
Vol 44 (3-4) ◽  
pp. 395-405 ◽  
Author(s):  
D. van der Waaij ◽  
T. M. Tieleman-Speltie ◽  
A. M. J. De Roeck-Houben
Keyword(s):  
Pathogenic Microorganisms ◽  
Resistance To Infection ◽  
Faecal Concentration ◽  
Potentially Pathogenic Microorganisms

Effective Purification of Water from Iron Ions and Potentially Pathogenic Microorganisms Using a Montmorillonite Composite Sorbent

2018 ◽  
Vol 92 (9) ◽  
pp. 1806-1812
Author(s):  
A. I. Vezentsev ◽  
V. A. Peristiy ◽  
V. D. Bukhanov ◽  
L. F. Peristaya ◽  
P. V. Sokolovskiy ◽  
...  
Keyword(s):  
Pathogenic Microorganisms ◽  
Iron Ions ◽  
Composite Sorbent ◽  
Potentially Pathogenic Microorganisms ◽  
Purification Of Water

scholarly journals Assessment of Postvaccine Immunity against Streptococcus pneumoniae in Patients with Asplenia, including an Analysis of Its Impact on Bacterial Flora of the Upper Respiratory Tract and Incidence of Infections

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Alina Olender ◽  
Katarzyna Małkińska ◽  
Jacek Roliński ◽  
Ewelina Grywalska ◽  
Elżbieta Pels ◽  
...  
Keyword(s):  
Respiratory Tract ◽  
Bacterial Flora ◽  
Carrier State ◽  
Control Group ◽  
Pathogenic Microorganisms ◽  
Upper Respiratory Tract ◽  
Specific Antibodies ◽  
Positive Effects ◽  
Upper Respiratory ◽  
Potentially Pathogenic Microorganisms

S. pneumoniae is a microorganism that may cause a serious threat in postsplenectomy patients due to a potentially invasive course of infection. In order to assess a protective activity after vaccination with the 23-valent vaccine, we made an analysis of the level of antibodies in patients with asplenia compared to a control group of healthy donors. Additionally, colonization by potentially pathogenic microorganisms of the upper respiratory tract was analyzed to determine the carrier state by strains with vaccine serotype. No such strains were found in the research, yet three non-vaccine-serotype strains were found. Colonization of the upper respiratory tract by potentially pathogenic microorganisms may be connected with increased susceptibility observed and incidence of infections in patients with asplenia. However, colonization by S. pneumoniae may not have an effect on the level of specific antibodies with the 23-valent vaccine against S. pneumoniae (PPV23) in postsplenectomy patients and healthy people. The response to vaccination against S. pneumoniae showed a lower level of specific antibodies in patients with splenectomy performed more than 2 years before the test than in patients with a recently removed spleen, i.e., from 1 month to 2 years before the test. Vaccination against pneumococci also has positive effects on incidence of other etiology infections, which is of high significance in the prophylaxis of infectious diseases in this group of patients.

Blood Pressure Cuff as a Potential Vector of Pathogenic Microorganisms A Prospective Study in a Teaching Hospital

2006 ◽  
Vol 27 (9) ◽  
pp. 940-943 ◽  
Author(s):  
C. de Gialluly ◽  
V. Morange ◽  
E. de Gialluly ◽  
J. Loulergue ◽  
N. van der Mee ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Prospective Study ◽  
Bacterial Infections ◽  
Pathogenic Bacteria ◽  
University Hospital ◽  
Pathogenic Microorganisms ◽  
Hospital Units ◽  
High Level ◽  
A Prospective Study ◽  
Potentially Pathogenic Microorganisms

Objective.To investigate the potential role of blood pressure (BP) cuffs in the spread of bacterial infections in hospitals.Design.A comprehensive, prospective study quantitatively and qualitatively evaluating the bacterial contamination on BP cuffs of 203 sphygmomanometers in use in 18 hospital units from January through March 2003.Setting.A university hospital with surgical, medical, and pediatric units.Results.A level of contamination reaching 100 or more colony-forming units per 25 cm2was observed on 92 (45%) of inner sides and 46 (23%) of outer sides of 203 cuffs. The highest rates of contamination occurred on the inner side of BP cuffs kept in intensive care units (ICUs) (20 [83%] of 24) or on nurses' trolleys (27 [77%] of 35). None of the 18 BP cuffs presumed to be clean (ie, those that had not been used since the last decontamination procedure) had a high level of contamination. Potentially pathogenic microorganisms were isolated from 27 (13%) of the 203 BP cuffs: 20 of these microorganisms wereStaphylococcus aureus, including 9 methicillin-resistant strains. The highest rates of contamination with potentially pathogenic microorganisms were observed on cuffs used in ICUs and those kept on nurses' trolleys. For 4 patients with a personal sphygmomanometer, a genetic link was found between the strains isolated from the BP cuffs and the strains isolated from the patients.Conclusions.The results of this survey highlight the importance of recognizing BP cuffs as potential vectors of pathogenic bacteria among patients and as a source of reinfection when dedicated to a single patient, emphasizing the urgent need for validated procedures for their use and maintenance.

Bacterial Contamination of Keyboards: Efficacy and Functional Impact of Disinfectants

2006 ◽  
Vol 27 (4) ◽  
pp. 372-377 ◽  
Author(s):  
William A. Rutala ◽  
Matthew S. White ◽  
Maria F. Gergen ◽  
David J. Weber
Keyword(s):  
Bacterial Contamination ◽  
Microbial Contamination ◽  
Healthcare Setting ◽  
Pathogenic Microorganisms ◽  
Sterile Water ◽  
Water Control ◽  
Coagulase Negative Staphylococci ◽  
Test Organisms ◽  
Vancomycin Resistant ◽  
Potentially Pathogenic Microorganisms

Background.Computers are ubiquitous in the healthcare setting and have been shown to be contaminated with potentially pathogenic microorganisms. This study was performed to determine the degree of microbial contamination, the efficacy of different disinfectants, and the cosmetic and functional effects of the disinfectants on the computer keyboards.Methods.We assessed the effectiveness of 6 different disinfectants (1 each containing chlorine, alcohol, or phenol and 3 containing quaternary ammonium) against 3 test organisms (oxacillin-resistant Staphylococcus aureus [ORSA], Pseudomonas aeruginosa, and vancomycin-resistant Enterococcus species) inoculated onto study computer keyboards. We also assessed the computer keyboards for functional and cosmetic damage after disinfectant use.Results.Potential pathogens cultured from more than 50% of the computers included coagulase-negative staphylococci (100% of keyboards), diphtheroids (80%), Micrococcus species (72%), and Bacillus species (64%). Other pathogens cultured included ORSA (4% of keyboards), OSSA (4%), vancomycin-susceptible Enterococcus species (12%), and nonfermentative gram-negative rods (36%). All disinfectants, as well as the sterile water control, were effective at removing or inactivating more than 95% of the test bacteria. No functional or cosmetic damage to the computer keyboards was observed after 300 disinfection cycles.Conclusions.Our data suggest that microbial contamination of keyboards is prevalent and that keyboards may be successfully decontaminated with disinfectants. Keyboards should be disinfected daily or when visibly soiled or if they become contaminated with blood.

scholarly journals Shared Escovopsis parasites between leaf-cutting and non-leaf-cutting ants in the higher attine fungus-growing ant symbiosis

2015 ◽  
Vol 2 (9) ◽  
pp. 150257 ◽  
Author(s):  
Lucas A. Meirelles ◽  
Scott E. Solomon ◽  
Mauricio Bacci ◽  
April M. Wright ◽  
Ulrich G. Mueller ◽  
...  
Keyword(s):  
Endemic Species ◽  
Tripartite Model ◽  
Pathogenic Microorganisms ◽  
Southern Brazil ◽  
Ecological Studies ◽  
Comprehensive Collection ◽  
Attine Ants ◽  
Leaf Cutting ◽  
Phylogenetic Divergence ◽  
Potentially Pathogenic Microorganisms

Fungus-gardening (attine) ants grow fungus for food in protected gardens, which contain beneficial, auxiliary microbes, but also microbes harmful to gardens. Among these potentially pathogenic microorganisms, the most consistently isolated are fungi in the genus Escovopsis , which are thought to co-evolve with ants and their cultivar in a tripartite model. To test clade-to-clade correspondence between Escovopsis and ants in the higher attine symbiosis (including leaf-cutting and non-leaf-cutting ants), we amassed a geographically comprehensive collection of Escovopsis from Mexico to southern Brazil, and reconstructed the corresponding Escovopsis phylogeny. Contrary to previous analyses reporting phylogenetic divergence between Escovopsis from leafcutters and Trachymyrmex ants (non-leafcutter), we found no evidence for such specialization; rather, gardens from leafcutters and non-leafcutters genera can sometimes be infected by closely related strains of Escovopsis , suggesting switches at higher phylogenetic levels than previously reported within the higher attine symbiosis. Analyses identified rare Escovopsis strains that might represent biogeographically restricted endemic species. Phylogenetic patterns correspond to morphological variation of vesicle type (hyphal structures supporting spore-bearing cells), separating Escovopsis with phylogenetically derived cylindrical vesicles from ancestral Escovopsis with globose vesicles. The new phylogenetic insights provide an improved basis for future taxonomic and ecological studies of Escovopsis .

scholarly journals Sterilization methods for humam teeth

2020 ◽  
Vol 68 ◽  
Author(s):  
Rafael Jordão Storino Vaz MONTEIRO ◽  
Bárbara Daphini Matos SILVA ◽  
Lorena Esteve SILVEIRA ◽  
Maria Eugênia ALVAREZ-LEITE ◽  
Flavio Ricardo MANZI ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Brain Heart Infusion ◽  
Positive Control ◽  
Distilled Water ◽  
Pathogenic Microorganisms ◽  
Friedman Test ◽  
Human Teeth ◽  
Before And After ◽  
Sterilization Process ◽  
Potentially Pathogenic Microorganisms

ABSTRACT Appropriate sterilization methods for dental substrate are necessary so that extracted teeth can be used in laboratory activities, since potentially pathogenic microorganisms may be present even if teeth have been cleaned. Objective Evaluating the sterilization process of human teeth performed by microwave irradiation and autoclave sterilization. Methods Fifty human premolar teeth were sectioned in two portions and distributed in two test groups: G1 - autoclave sterilization for 20 minutes, 1Kgf/cm2, at 127ºC; G2 - Microwave irradiation in a recipient containing 100ml of distilled water, 900W for 5 minutes. Before and after the decontamination process, all teeth were immersed in Brain Heart Infusion (BHI) broth to verify their contamination (positive control) and decontamination potential respectively. Results The statistical analysis of the Friedman test (p <0.05) showed that all the tested sterilization methods were statistically effective. Conclusion These results show that both autoclaving and microwave irradiation are effective alternatives for the sterilization of human teeth.

scholarly journals Microbiological and Histological Analysis for the Evaluation of Farmed Mussels (Mytilus galloprovincialis) Health Status, in Coastal Areas of Italy

Pathogens ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 395 ◽  
Author(s):  
Roberta Battistini ◽  
Katia Varello ◽  
Valeria Listorti ◽  
Michela Zambon ◽  
Giuseppe Arcangeli ◽  
...  
Keyword(s):  
Health Status ◽  
Mytilus Galloprovincialis ◽  
Histological Analysis ◽  
Health Conditions ◽  
Pathogenic Microorganisms ◽  
Shellfish Farming ◽  
Adverse Environmental Conditions ◽  
Production Areas ◽  
Potentially Pathogenic Microorganisms

Shellfish farming is a relevant economic activity in Italy. The Gulf of La Spezia is one of the major production areas for mussels: the area is characterized by the presence of numerous human activities that could harm the quality of seawater. Additionally, the presence of potentially pathogenic microorganisms may influence the health status of animals, which must be constantly monitored. To have a clear view of the health conditions of the mussels (Mytilus galloprovincialis) farmed in this area, microbiological, parasitological, and histological analyses were performed. The study was conducted from November 2016 to October 2017. Overall, despite the presence of potentially pathogenic microorganisms for mussels, abnormal mortality rates were not reported during the monitoring period and the histological examination revealed no significant lesions. Our study confirms that studying different aspects together is a useful tool for assessing the health conditions of mussels and points out the importance of adverse environmental conditions for the expression of the pathogenicity of microorganisms.

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