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. 1969 Oct;100(1):201–208. doi: 10.1128/jb.100.1.201-208.1969

Purified Protoplasmic Peptides of Mycobacteria: In Vivo and In Vitro Comparison of the Species Specificity of Purified Protoplasmic Peptides and Purified Protein Derivatives of Mycobacterial Culture Filtrates

K D Stottmeier 1, R E Beam 1, G P Kubica 1
PMCID: PMC315378  PMID: 4981056

Abstract

The specificity of purified protein derivatives (PPD) prepared from the culture filtrates of Mycobacterium tuberculosis (PPD), M. kansasii (PPD-Y), M. intracellulare (PPD-B), and M. scrofulaceum (PPD-G) were compared to comparable protoplasmic extracts (PPP) of the same organisms by gel diffusion and delayed hypersensitivity reactions in sensitized guinea pigs. PPD and, to a lesser degree, PPD-Y demonstrated specificities sufficient to enable identification of homologously sensitized guinea pigs in the above group of four mycobacteria. PPD-B and PPD-G did not always elicit the largest reaction in homologously sensitized animals. The PPP sensitins from M. tuberculosis and M. kansasii produced as good skin reactions at 24 and at 48 hr as did their PPD counterparts. The PPP from M. scrofulaceum and M. intracellulare were more specific and more reactive than corresponding PPD, regardless of the time of comparison. Although based on different immunological mechanisms, the specificity of these two groups of sensitins, as demonstrated by delayed hypersensitivity, correlated well with serological comparisons in the gel diffusion test. The low degree of specificity of PPD-B and PPD-G in contrast to that of corresponding PPP was reflected in the precipitin bands in agar gel.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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