Delayed diagnosis in a child with strangulated mesenteric hernia.

Background: Strangulated intestinal obstruction is a life-threatening condition that should be considered as a differential diagnosis in children with shock. However, it has pitfalls in diagnosis and can lead to diagnostic errors.

Case Presentation: A 3-month-old male patient presented with a pale complexion lasting 2 h and abnormal crying.

Comparison of the Filter Efficiency of Medical Nonwoven Fabrics against Three Different Microbe Aerosols.

　Exact evaluation of the performance of surgical masks and biohazard protective clothing materials against pathogens is important because it can provide helpful information that healthcare workers can use to select suitable materials to reduce infection risk. Currently, to evaluate the protective performance of nonwoven fabrics used in surgical masks against viral aerosols, a non-standardized test method using phi-X174 phage aerosols is widely performed because actual respiratory viruses pose an infection risk during testing and the phage is a safe virus to humans. This method of using a phage is simply modified from a standard method for evaluation of filter performance against bacterial aerosols using Staphylococcus aureus, which is larger than virus particles.

Advanced Analysis to Distinguish between Physical Decrease and Inactivation of Viable Phages in Aerosol by Quantitating Phage-Specific Particles.

　Recent studies have investigated the efficacy of air-cleaning products against pathogens in the air. A standard method to evaluate the reduction in airborne viruses caused by an air cleaner has been established using a safe bacteriophage instead of pathogenic viruses; the reduction in airborne viruses is determined by counting the number of viable airborne phages by culture, after operating the air cleaner. The reduction in the number of viable airborne phages could be because of "physical decrease" or "inactivation".