Influência do tempo na desinfecção de alginato contaminado com Staphylococcus aureus em ácido peracético ou gluataraldeído / Influence of the time for the disinfection of alginate infected with Staphylococcus aureus in glutaraldehyde and peracetic acid

Objetivo: O objetivo deste estudo foi avaliar a eficácia do ácido peracético e do glutaraldeído na desinfecção do alginato contaminado com Staphylococcus aureus em função do tempo de imersão (10 e 5min).Materiais e métodos: Os corpos de prova foram previamente contaminados com S. aureus e em seguida divididos em seis grupos de acordo com a substância desinfetante e o tempo de imersão. As amostras foram incubadas em 20 mL de caldo BHI estéril em estufa a 35± 2 ºC, sob agitação de 100 rpm, por 16 horas. Posteriormente asamostras do caldo de todos os tubos de ensaio foram semeadas para determinar a presença ou ausência de células viáveis. Resultados: Os resultados mostraram que os grupos controle e olavado em água estéril apresentaram crescimento bacteriano. Conclusão:O ácido peracético foi igualmente eficaz ao glutaraldeído para desinfecção, doalginato contaminado com S. aureus,por imersão tanto no tempo de 10 quanto 5 minutos .

Objective: The aim of this study was to evaluate the effectiveness of peracetic acid and glutaraldehyde for the disinfection of alginate contaminated with Staphylococcus aureus as a functionof immersion time (10 and 05 min).Materials and methods: The specimenswere previously contaminated withS. aureus and then divided into sixgroups based on the disinfectantsubstance and immersion time. The samples were incubated in 20 ml ofsterile BHI broth in an oven at 35 ±2 °C and shakd at 100 rpm for16 hours.Subsequently the samples of the brothfrom all the test tubes were platedto dete rmine the presence or absenceof viable cells. Results: The results showed that the control groups andthat just washed in sterile water showedbacterial growth. Conclusion: Theperacetic acid and glutaraldehyde was also effective for disinfection of alginate infected with S. aureus, both byimmersion time of 10 and 5 minute.

Three Cases of Colonic Pseudolipomatosis Induced by Endoscope Disinfectant / 대한소화기내시경학회지

Colonic pseudolipomatosis is a benign condition that is caused by mechanical trauma during an endoscopic procedure or by disinfectant colitis. It is characterized by empty vacuoles that are similar to the adipocyte in the lamina propria on histology and whitish plaques that are seen endoscopy. The prevalence of pseudolipomatosis is relatively low due to the lack of clinical experience and there have been no Korean reports about colonic pseudolipomatosis with the typical endoscopic findings. We report here on three cases of colonic pseudolipomatosis that was caused by endoscope disinfectant (paracetic acid). Typical whitish plaques were observed during the colonoscopic procedures in all 3 cases. In one case, whitish plaques appeared before our eyes immediately after the sudden appearance of whitish foamy fluid when the water button was depressed. H&E stain revealed empty vacuoles in the lamina propria and immunohistochemical staining showed no expression of CD31, CD34 and s-100. There were no symptoms related to these lesions in our cases.