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Cross-reactivity between the house dust mite Dermatophagoides pteronyssinus and the mange mites Psoroptes cuniculi and P. ovis. I. Demonstration of antibodies to the house dust mite allergen Dpt 12 in sera from P. cuniculi-infested rabbits



Cross-reactivity between the house dust mite Dermatophagoides pteronyssinus and the mange mites Psoroptes cuniculi and P. ovis. I. Demonstration of antibodies to the house dust mite allergen Dpt 12 in sera from P. cuniculi-infested rabbits



Journal of Allergy and Clinical Immunology 78(2): 293-299



The cross-reactivity of the mange mites Psoroptes cuniculi (PC) and Psoroptes ovis (PO) antigens with the house dust mite Dermatophagoides pteronyssinus (DP) antigens has been studied. Cross-reactivity between mange mite and house dust mite antigens was demonstrated by both ELISA and immunoelectrophoresis by use of a sheep anti-DP antiserum. Both PC and PO were demonstrated to contain eight cross-reacting antigens. Sera from rabbits infested with PC were demonstrated to produce antibodies to the homologous immunogen, to PO antigens, and to DP antigens. Of the seven sera from infested rabbits tested, four were demonstrated to produce a strong antibody response to a major DP antigen Dpt 12, and two were demonstrated to produce a weak response that was judged empirically by double-diffusion analysis. Two sera were judged to react with the DP lipoprotein, Dpt 4. Sera from control rabbits did not demonstrate reactivity with any extract tested. Despite the detection of anti-Dpt 12 antibodies, however, an antigen corresponding to Dpt 12 was not detected in either PC or PO extracts. The findings that mange mite-infested rabbits produce antibodies that recognize DP antigens probably explain previous observations in which it was demonstrated that commercially obtained rabbit anti-immunoglobulin antisera contain anti-DP antibodies, a finding that suggests caution in the use of such reagents in studies designed to measure antibody responses to DP allergens.

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Accession: 039709855

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PMID: 2426321


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