Abstract:
:Exposure to natural rubber latex (NRL) medical gloves poses risks to patients sensitized to NRL and to users of protective gloves. Previous studies have shown that extractable allergen levels of the gloves vary widely. Since most of the available laboratory methods of NRL allergen measurement lack adequate validation, we wanted to evaluate the performance of a recently developed competitive IgE-ELISA-inhibition method in relation to the skin prick test (SPT) and RAST inhibition, as well as to extractable protein quantification and an immunochemical latex antigen assay (LEAP). Twenty samples of surgical (n = 14) and examination gloves (n = 6), covering > 90% of medical gloves marketed in Finland in 1994-5, were collected by the Finnish National Research and Development Centre for Welfare and Health, coded, extracted, and analyzed by the five methods. The IgE-ELISA inhibition correlated highly significantly with SPT (r = 0.94) and RAST inhibition (r = 0.96). Likewise, ELISA inhibition and RAST inhibition showed highly significant correlation (P = 0.96, P < 0.0001 in all three instances). Protein quantification by a modified Lowry method also correlated highly significantly with SPT (r = 0.80), RAST inhibition (r = 0.82), and ELISA inhibition (r = 0.81, P < 0.0001 in all three instances). Clearly weaker correlation, though statistically significant (r = 0.48, P = 0.03), was found between SPT and the LEAP assay. An NRL standard preparation was assigned an arbitrary content of 100,000 allergen units (AU) per ml. In relation to this standard, the NRL allergen level was considered low (< 10 AU/ml) in 11, moderate (10-100 AU/ml) in two, and high (> 100 AU/ml) in seven of the 20 glove brands analyzed. In conclusion, the results of a novel IgE-ELISA-inhibition method of measuring NRL allergen levels in medical gloves correlated highly significantly with those of SPT. The ELISA method was found to be sensitive, reproducible, technically easy, inexpensive, and suitable for the analysis of large numbers of NRL products. The results of extensive market surveys in 1994 and 1995, communicated to the medical community in Finland, appear to have had a clear effect in moving glove purchasing policies toward the use of low-allergen gloves.
journal_name
Allergyjournal_title
Allergyauthors
Palosuo T,Mäkinen-Kiljunen S,Alenius H,Reunala T,Yip E,Turjanmaa Kdoi
10.1111/j.1398-9995.1998.tb03774.xsubject
Has Abstractpub_date
1998-01-01 00:00:00pages
59-67issue
1eissn
0105-4538issn
1398-9995journal_volume
53pub_type
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