The use of rat liver/kidney/stomach tissue can be utilized to screen for reticulin antibodies by immunofluorescence. There are a variety of staining patterns associated with the mesenchymal structures in the liver, kidney and other organs.1 Many sera appear to contain a mixture of antibodies and stain cells, ground substances and fibers in various combinations. These antibodies may appear individually, and attempts have been made to access their occurrence as they relate to specific diseases.
A material which is used to establish known points of reference for an assay intended to be used for the qualitative and/or quantitative detection of peptidase enzyme from multiple bacteria associated with periodontal disease, which may include Porphyromonas, Tannerella, Actinobacillus and/or Treponema species in a clinical specimen.