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Keywords:

  • Dermatophagoides siboney;
  • Dermatophagoides pteranyssinus;
  • Dermato-phugoides farinae;
  • Blomia tropicalis;
  • storage mites;
  • crossreactivity;
  • inhibition;
  • IgE

Summary

Background The role of Pyroglyphid mites in IgE-mediated serisitizalion has been well eslahlished. Although mites belonging to the genus Dermatophagoidess dominate in the acarofauna of domestic dust. non-pyroglyphid mites might also be of clinical importance. In Cuba, Dermatophagoides siboney is found in dust coexisting with D. pteronyssiuus and Blomia tropicalis. Dermatophagoides forinae is not found. Storage mites, such as Acorus siro, Lepidoglyphus destructor and Tyrophagus putrescentiae might also be present.

Objective The aim of this study was to investigate the allergenic relationships among the mites present in the environment of allergic patients in Cuba.

Methods The crossreactivialty between an extract of D. siboney and the above mentioned six mites was studied by specific IgE inhibition, using sera of mite-sensitive patients after incubation with serial dilutions of D. sibaney.

Results The inhibitory effect of D. sidiney extract was more pronounced against D. farinae. 91%, than against D. pyteronyssinus, 62%. Specific IgE to B. tropicali, A. siro, L. destructor and T. putrescentiae were inhibited to a much lesser extent, i.e. between 47 and 58%. The correlation between IgE to D. siboney and IgE to D. pteronyssinus and D. farinae was of 0.92 and 0.90. respectively. A weaker correlation was found between D. siboney and L. destructor (0.7), A. siro (0.67), B. tropicalis (0.54) and T. putrescentiae (0.51).

Conclusion Thus. D. siboney seems to be most closely related to D. farinae.