scholarly journals Study on the Efficacy of Peracetic Acid Disinfectant (Type III) on Gastrointestinal Endoscopy Disinfection

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Nan Zhang ◽  
Jianqiang Guo ◽  
Lan Liu ◽  
Honglei Wu ◽  
Jiaoyang Gu
2016 ◽  
Vol 19 (1) ◽  
pp. 106
Author(s):  
Livia Lie Sonoda Sekiguchi ◽  
Ricardo Takiy Sekiguchi ◽  
Milton Edson Miranda ◽  
Roberta Tarkany Basting

<p class="western" align="justify"><span style="color: #000000;"><span style="font-family: Arial, serif;"><strong>Objective</strong></span></span><span style="color: #000000;"><span style="font-family: Arial, serif;">: the purpose of this study was to evaluate the efficacy of disinfection of type III dental stone by immersion in 1% sodium hypochlorite and 0.25% peracetic acid at different </span></span><span style="font-family: Arial, serif;">periods of time (1, 5 and 10 min). </span><span style="color: #000000;"><span style="font-family: Arial, serif;"><strong>Material</strong></span></span><span style="color: #000000;"><span style="font-family: Arial, serif;"><strong>and</strong></span></span><span style="color: #000000;"><span style="font-family: Arial, serif;"><strong>Methods</strong></span></span><span style="color: #000000;"><span style="font-family: Arial, serif;">: s</span></span><span style="font-family: Arial, serif;">ilicon dies were previously infected with strains of </span><span style="font-family: Arial, serif;"><em>Bacillus subtilis</em></span><span style="font-family: Arial, serif;"> for 15 min. Then</span><span style="color: #000000;"><span style="font-family: Arial, serif;">, type III gypsum stone (Herodent, </span></span><span style="font-family: Arial, serif;">Vigodent COLTÈNE SA, Rio de Janeiro, Brazil</span><span style="color: #000000;"><span style="font-family: Arial, serif;">) was inserted </span></span><span style="font-family: Arial, serif;">into the cavities to obtain contaminated specimens. A sterile silicone die was used to obtain uncontaminated specimens. The specimens were separated into positive and negative control groups, and further divided into the following groups: blocks immersed in sterile physiologic solution for 1, 5 or 10 min; blocks immersed in 1% sodium hypochlorite for 1, 5 or 10 min; and blocks immersed in 0.25% peracetic acid for 1, 5 or 10 min. All the groups were double-plated and incubated at 37 ˚C for 24 h. </span><span style="color: #000000;"><span style="font-family: Arial, serif;"><strong>Results</strong></span></span><span style="color: #000000;"><span style="font-family: Arial, serif;">: t</span></span><span style="font-family: Arial, serif;">he results were expressed in colony forming units (CFU/ml) and the data were submitted to the Kruskal-Wallis test followed by Dunn’s test. The results showed that immersion in 1% sodium hypochlorite and 0.25% peracetic acid resulted in complete disinfection of the test specimens at all test periods (p &lt; 0.01), whereas immersion in saline did not provide effective disinfection. </span><span style="font-family: Arial, serif;"><strong>Conclusion</strong></span><span style="font-family: Arial, serif;">: i</span><span style="color: #000000;"><span style="font-family: Arial, serif;">t can be concluded that both 1% sodium hypochlorite and 0.25% peracetic acid provided effective disinfection in dental stone specimens immersed in the solutions described above, at different periods of time.</span></span></p><p class="western" align="justify"><span style="color: #000000;"><span style="font-family: Arial, serif;"><strong>Keywords</strong></span></span></p><p class="western" align="justify"><span style="color: #000000;"><span style="font-family: Arial, serif;">Disinfection; Peracetic acid; Sodium hypochlorite; Stone casts.</span></span></p>


Author(s):  
Sunao Fujimoto ◽  
Raymond G. Murray ◽  
Assia Murray

Taste bud cells in circumvallate papillae of rabbit have been classified into three groups: dark cells; light cells; and type III cells. Unilateral section of the 9th nerve distal to the petrosal ganglion was performed in 18 animals, and changes of each cell type in the denervated buds were observed from 6 hours to 10 days after the operation.Degeneration of nerves is evident at 12 hours (Fig. 1) and by 2 days, nerves are completely lacking in the buds. Invasion by leucocytes into the buds is remarkable from 6 to 12 hours but then decreases. Their extrusion through the pore is seen. Shrinkage and disturbance in arrangement of cells in the buds can be seen at 2 days. Degenerated buds consisting of a few irregular cells and remnants of degenerated cells are present at 4 days, but buds apparently normal except for the loss of nerve elements are still present at 6 days.


Author(s):  
E.M. Kuhn ◽  
K.D. Marenus ◽  
M. Beer

Fibers composed of different types of collagen cannot be differentiated by conventional electron microscopic stains. We are developing staining procedures aimed at identifying collagen fibers of different types.Pt(Gly-L-Met)Cl binds specifically to sulfur-containing amino acids. Different collagens have methionine (met) residues at somewhat different positions. A good correspondence has been reported between known met positions and Pt(GLM) bands in rat Type I SLS (collagen aggregates in which molecules lie adjacent to each other in exact register). We have confirmed this relationship in Type III collagen SLS (Fig. 1).


Author(s):  
G. D. Gagne ◽  
M. F. Miller ◽  
D. A. Peterson

Experimental infection of chimpanzees with non-A, non-B hepatitis (NANB) or with delta agent hepatitis results in the appearance of characteristic cytoplasmic alterations in the hepatocytes. These alterations include spongelike inclusions (Type I), attached convoluted membranes (Type II), tubular structures (Type III), and microtubular aggregates (Type IV) (Fig. 1). Type I, II and III structures are, by association, believed to be derived from endoplasmic reticulum and may be morphogenetically related. Type IV structures are generally observed free in the cytoplasm but sometimes in the vicinity of type III structures. It is not known whether these structures are somehow involved in the replication and/or assembly of the putative NANB virus or whether they are simply nonspecific responses to cellular injury. When treated with uranyl acetate, type I, II and III structures stain intensely as if they might contain nucleic acids. If these structures do correspond to intermediates in the replication of a virus, one might expect them to contain DNA or RNA and the present study was undertaken to explore this possibility.


2005 ◽  
Vol 173 (4S) ◽  
pp. 28-28 ◽  
Author(s):  
J. Quentin Clemens ◽  
Richard T. Meenan ◽  
Maureen C. O'Keeffe Rosetti ◽  
Sara Y. Gao ◽  
Elizabeth A. Calhoun

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