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  • Title: Skin test reactivity to whole body and fecal extracts of American (Periplaneta americana) and German (Blatella germanica) cockroaches in atopic asthmatics.
    Author: Menon P, Menon V, Hilman B, Stankus R, Lehrer SB.
    Journal: Ann Allergy; 1991 Dec; 67(6):573-7. PubMed ID: 1750718.
    Abstract:
    Forty-six atopic asthmatic subjects aged 3 to 58 years attending the allergy clinic of a university hospital were evaluated for prick skin test reactivity with commercially available extracts of cockroach (CCE) and house dust (HD). Additionally, skin testing was performed with American cockroach whole body (AWBE) and fecal extracts (AFE) as well as German cockroach whole body (GWBE) and fecal extracts (GFE) prepared in our laboratory. Commercial cockroach extract was prepared from American, German, and Oriental cockroach whole bodies. Skin test reactivity to the different extracts were as follows: 83% to HD, 70% to CCE, 70% to AWBE and/or GWBE, 63% to AWBE, 57% to GWBE, 63% to AFE and/or GFE, 52% to AFE, 50% to GFE, 48% to both AWBE and GWBE, and 39% to both AFE and GFE. The subjects with positive skin tests to AWBE and/or GWBE (70%) were the same individuals who showed skin test reactivity to CCE (70%). Subjects from lower income families (less than $10,000) had a significantly higher skin test reactivity to cockroach allergens than those from families with an annual income of $11,000 to $24,000 (P = .04). These results demonstrate the significance of cockroach sensitization in atopic asthmatics, suggest the importance of fecal cockroach allergens, and support earlier observations of shared interspecies allergens between American and German cockroach whole bodies.
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