Para-Pak® PLUS systems provide standardized procedures for the routine collection, preservation and examination of stool specimens for intestinal parasites. Kit systems are designed for easy use. In the PLUS format, the filtration device is incorporated in the cap of the collectiont vial. SAF is a multipurpose fixative/preservative suitable for direct examination, concentration, and permanent stain from the same specimen. It contains a low amount of formalin in order to reduce the exposure of the operator to this substance.