Dust mite numbers and mite and cockroach allergen and antigen levels in central Florida homes

Dust mite numbers and mite and cockroach allergen and antigen levels in central Florida homes

S330 Abstracts 046 Long-term Monitoring of the Immune Status of Children Living in Radionucleotide Contaminated Areas E. Kirylchyk ], L. Titov I, D. ...

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S330 Abstracts

046 Long-term Monitoring of the Immune Status of Children Living in Radionucleotide Contaminated Areas E. Kirylchyk ], L. Titov I, D. Charnashey ], L. M. Du Buske2; iBelarus State Medical University, Minsk, BELARUS, 2immunology Research Institute of New England, Fitchburg, MA. RATIONALE: Investigation of the immunologic effects of the Chernobyl disaster allows for long-term study of immune status parameters and allergic response markers in children. METHODS: 180 children, aged 5-15 years, living in radiation-contaminated areas of Mogilev were examined from 1997 to 2002. Children were divided into 4 groups dependent on ground 137Cs levels: I group- <5 Cu/km2; II group- 5-7 Cu/km2; II1 group- 13-16 Ca/kin2; IV group- more than 16 Cu/km 2. The cellular immune parameters were evaluated by immunophenotyping of CD-antigens and total IgE level was determined by ELISA. RESULTS: From 1997-1999, 40.8 -+ 2.4% of children living in contaminated territories had an IgE concentration >300 IU/ml. Total IgE level in children living in heavily contaminated areas 037Cs>16 Cu/km 2) was twice the control value. In 2002 a repeat study confirmed that children living in areas contaminated with Cs137 above 13 Cu/km 2 had high serum IgE levels which persisted. In groups III and IV from 1997-2002 a significant decrease of CD3(+), CD4(+) and CDg(+)-lymphocytes and significant increase of CD25(+) and HLA-DR(+) cells were noted when compared to the control group (p<0.05) and when compared to children living in areas with low 137Cs (<5 Cu/km 2) contamination (p<0.05). C O N C L U S I O N S : In children living in Cs137 contaminated areas of Belarus during the period of observation high serum IgE concentrations persisted associated with shifts in lymphocyte populations consistent with a significant change in immune status consequent to the long term effects of the Chernobyl disaster.

Funding: Ministry of Health of Belarus

1047 Seasonal Distribution of Cockroaches, a Major Source of Indoor Allergens, in Seoul, Korea C. Kim j, W. Kim l, K. Lee l, M. Shon l, G. Jang l, K. Kim 1, l. Lee 2, K. Jeong 2, J. Lee 2, T. Yong 2, C. Kim 3, J. Park 3, C. Hong3; Ipediatrics, Yonsei University College of Medicine, Seoul, REPUBLIC OF KOREA, 2parasitology, Yonsei University College of Medicine, Seoul, REPUBLIC OF KOREA, 3Internal Medicine, Yonsei University College of Medicine, Seoul, REPUBLIC OF KOREA. RATIONALE: Distribution of cockroach was little been known in Korea. The aim of this study was to evaluate species of cockroaches and seasonal distribution of cockroaches in Seoul. METHODS: The study was performed during April 2000 through January 2001, from 63 houses in Korea. The total of 63 residential homes from different districts in Seoul were selected for the home environment survey. Bait traps (10 x 20 x 4, Zoro Zoro, Taisho Pharmacy, Tokyo, Japan) were placed on four different places of kitchen floor and one in the side of balcony in the house and left for 5 days to capture cockroaches. RESULTS: The cockroaches were captured in 23 houses (36.5%) out of 63 houses. And the inhabitant density of cockroaches was highest in the autumn (43.3%) followed by summer (29.2%), spring (t8.3%) and winter (9.2%). In only 3 species were collected in Seoul area. The most common species were Blattella germanica showing 72.5% of the collected cockroaches, followed by Periplaneta japonica (25.2%) Periplaneta americana (2.3%). The total number of captured cockroaches was 504 and the number of nymph was 314 (62.2%). Isolated house type showed higher trapping rates than the apartment. Positive skin test rates were 46.2% in the healthy control group and 43.8% in the allergy patients. CONCLUSIONS: Periplaneta americana was captured in Seoul area, which had not been found previously. The inhabitant density of cockroaches was the lowest in the winter.

Funding: Ministry of Health and WelJ~tre

1048 Antigen Dust Mite Numbers and Mite and Cockroach Allergen and Levels in Central Florida Homes R. Codlna; Internal Medicine, University of South Florida, Tampa, FL.


RATIONALE: Since indoor allergen sources are affected by home and climatic characteristics, we determined in Florida homes: (1) mite numbers; (2) Group 1, mite allergen (MA) and mite antigen (MAG); (3) Bla g2, cockroach allergen (GCA) and cockroach antigen (GCAG); (4) correlations with home characteristics; (5) allergen versus antigen levels correlations. METHODS: Mites were counted in 396 bedroom dust samples from different homes, MA and GCA measured using mAbs, and MAG and GCAG using polyclonal antibodies. Home characteristics were evaluated by questionnaire. RESULTS: (1) mites were present in 97.7% (294 _+418 mites/g), MA in 94% (0.8 + 0.99 rag/g), and MAG in 99.5% (351.2 _+603.9 rag/g) homes; (2) GCA was absent and GCAG present in all samples (1,738 ___2,709 mg/g); (3) there are positive correlations between mites and MA (r = 0.24, p < 0.05), mites and MAG (r = 0.34, p < 0.001), and MA and MAG (r = 0.34, p < 0.001); (4) mite numbers are negatively associated with pets (r = -0.22, p < 0.001), air conditioning use (r = ~3.31, p < 0.001) and positively with house age (r = 0.17, p < 0.05); and (5) GCAG is associated with vacuuming frequency (r = 0.14, p < 0.05). CONCLUSIONS: MAG is more sensitive than MA measurement or mite counting to detect mite infestation. The presence of GCAG in bedroom dust suggests that cockroach infestation is common in Florida. Antigen quantification might be more appropriate than allergen measurement for indoor environmental control studies.

Funding: AAFA, Florida Chapter

1049 Domestic Mite Sensitization in German Patients--Including Chortoglyphusarcuatus and Gohieria fusca H. Miisken j, J. T. Franz 2, U. Schlensog 3, A. Heutelbeck 4, T. Schulz 4, C. Junghans4, P. Tucholla4, P. Hallier 4, K. C. Bergmann J; IAllergy and Asthma Clinic, Bad Lippspringe, GERMANY, 2Applied Biology, University of Paderborn, GERMANY, 3Hycor Biomedical, Kassel, GERMANY, 4Georg-August-University, G6ttingen, GERMANY. RATIONALE: There is limited knowledge about the allergological importance of domestic mites such as Chortoglyphus arcuatus and Gohieria fusca in Germany. METHODS: We studied 84 patients sensitized (RAST) with at least one of the mites Acarus siro, Lepidoglyphus destructor and Tyrophagus putrescentiae. Additional specific IgE determinations (HYCOR Biomedical) were performed in these patients with 9 domestic mites in total, including Chortoglyphus arcuatus and Gohieriafusca. The protein pattern of different mite extracts were studied using SDS-PAGE. RESULTS: The frequency of sensitization concerning the individual mites ranged from 20% (Euroglyphus maynei) to 92% (Dermatophagoides pteronyssinus and D. farinae). Specific IgE to Chortoglyphus arcuatus and Gohieria fusca was found in 77% and 46% respectively. For most of the extracts SDS-PAGE revealed protein patterns ranging from 14-94 kD, especially in the 14-21 and 28-30 kD range respectively. Chortogl)phus arcuatus showed a protein band between 28-30 kD. No distinct bands were found for Gohieria fusca. CONCLUSIONS: Patients with sensitization to domestic mites frequently exhibit specific lgE to different species at the same time, explainable by cross reactive allergens or coexisting sensitizations. Chortoglyphus arcuatus and Gohieria fusca are frequent sensitizers in German patients. The protein pattern of different mite extracts show similarities, probably due to common allergens.

Funding: Self-funded


Comparisonof Swiffer| to a Standard Electrostatic Cloth in Reducing Allergen Levels in Day Care Centers

M, Rezvani 1, R, Floyd 2, A. Perez 3, B. Lanphear4, L. Levine 3, J. A. Bernstein2; qnternal Medicine, Jewish Hospital of Cincinnati, Cincinnati, OH, 2Internal Medicine/Division of Immunology/Allergy Section, University of Cincinnati College of Medicine, Cincinnati, OH, 3Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, 4General Pediatrics/Division of Epidemiology, Children's Hospital Medical Center, Cincinnati, OH. R A T I O N A L E : Daycare center (DCC) studies indicate that changing