PAS reaction stains phagocytosed atypical mycobacteria in paraffin sections

Miguel Pappolla, V. T. Mehta

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In 4% formaldehyde-fixed, paraffin-embedded tissues, PAS negativity for mycobacteria in the literature has been axiomatic. However, recent observations of disseminated human mycobacteriosis have shown that intracellular (phagocytosed) organisms stained strongly positive with the routine PAS technique. This staining was abolished by a sequential hydrolytic procedure, which suggests that the carbohydrate residues of the mycobacterial peptidoglycolipids are responsible for the reaction. This staining characteristic in tissue sections is of diagnostic importance, since few bacteria of medical relevance are concomitantly acid-fast and PAS positive. The nature of this affinity is for the aqueous form of basic fuchsin.

Original languageEnglish (US)
Pages (from-to)372-373
Number of pages2
JournalArchives of Pathology and Laboratory Medicine
Volume108
Issue number5
StatePublished - 1984
Externally publishedYes

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Periodic Acid-Schiff Reaction
Nontuberculous Mycobacteria
Phagocytosis
Paraffin
Coloring Agents
Staining and Labeling
Mycobacterium
Formaldehyde
Carbohydrates
Bacteria
Acids

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Medical Laboratory Technology

Cite this

PAS reaction stains phagocytosed atypical mycobacteria in paraffin sections. / Pappolla, Miguel; Mehta, V. T.

In: Archives of Pathology and Laboratory Medicine, Vol. 108, No. 5, 1984, p. 372-373.

Research output: Contribution to journalArticle

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