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Clinical and Serological Findings in Patients with Toxocariasis in the Pohang Region: The Features of Toxocariasis in Pohang

포항 지역의 톡소카라증의 임상적, 혈청학적 특징에 관한 연구: 포항의 톡소카라증의 특징

  • Ryu, Byung Han (Department of Allergy and Rheumatology, Sunlin Hospital) ;
  • Park, Jun Seok (Department of Allergy and Rheumatology, Sunlin Hospital) ;
  • Jung, Yeo Jin (Department of Allergy and Rheumatology, Sunlin Hospital) ;
  • Kang, Soo Kyoung (Department of Allergy and Rheumatology, Sunlin Hospital) ;
  • Lee, Seung Hee (Department of Allergy and Rheumatology, Sunlin Hospital) ;
  • Choi, Sung Jin (Department of Allergy and Rheumatology, Sunlin Hospital)
  • 류병한 (포항 선린병원 알레르기 류마티스내과) ;
  • 박준석 (포항 선린병원 알레르기 류마티스내과) ;
  • 정여진 (포항 선린병원 알레르기 류마티스내과) ;
  • 강수경 (포항 선린병원 알레르기 류마티스내과) ;
  • 이승희 (포항 선린병원 알레르기 류마티스내과) ;
  • 최성진 (포항 선린병원 알레르기 류마티스내과)
  • Published : 2013.02.01

Abstract

Background/Aims: This study was performed to investigate the clinical and serological characteristics of toxocariasis in the Pohang region. Methods: A total of 145 patients with peripheral eosinophilia (> 450 $cells/{\mu}L$) were enrolled and divided into two groups based on Toxocara excretory-secretory IgG enzyme-linked immunosorbent assay (ELISA) positivity, and the clinical features and serologic markers were compared between the two groups. Results: The seropositive rate of Toxocara was 62.1%. The serum total eosinophils (p = 0.038), total IgE level (p < 0.01), Dermatophagoides farinae (Df) seropositivity rate (p < 0.01), frequency of eosinophilic tissue infiltration in the lung or liver (p < 0.01), and ingestion of raw cow meat or liver (p < 0.01) were higher in seropositive patients than in seronegative patients. However, the presence of asthma and rhinitis (p < 0.01) were more frequent in seronegative patients. Among seropositive patients, positive correlations were observed between serum total IgE, total eosinophils, and the optical density value of the Toxocara IgG ELISA (p < 0.01; p = 0.015, respectively). The specific IgE to Df was significantly higher (p < 0.01) than that to Dermatophagoides pteronyssinus (Dp), suggesting a cross reaction between the Df antigen and the Toxocara antigen. Conclusions: Patients who have elevated serum total IgE and have eosinophilia without allergic disease might have toxocariasis. The lower frequency of asthma or rhinitis and a tendency for higher specific IgE to Df than that to Dp could be useful findings for the diagnosis of toxocariasis in patients with eosinophilia.

목적: 톡소카라증은 개회충 또는 고양이회충의 충란을 섭취함으로써 발생하는 질환이며 원충에 대한 여러 가지 알레르기 반응을 통한 다양한 증상을 일으킨다. 저자들은 포항 지역의 톡소카라증의 임상적, 혈청학적 특징을 연구하여 호산구증가증 환자에서 톡소카라증을 더 의심할 수 있게 하는 소견을 알아보고자 본 연구를 시행하였다. 방법: 2008년 8월부터 2011년 5월까지 말초 호산구증가증으로 본 병원에 방문한 145명의 환자들을 대상으로 하였다. Toxocara ELISA 양성군 90명 및 음성군 55명으로 환자군을 분류하였고 나이, 성별, 알레르기 천식, 비염, 폐 또는 간의 호산구 침착 같은 임상양상뿐만 아니라 Immuno-CAP 방법을 사용하여 혈청 총 IgE, 집먼지진드기에 대한 특이 IgE 와 같은 혈청학적 양상을 비교 분석하였다. 결과: 전체 대상 환자 145명 중 Toxocara ELISA 양성 90예 (62.1%) 음성 55예 (37.9%)였다. Toxocara ELISA 양성군에서 평균연령은 54.8${\pm}$14.5세, 음성군에서 49.2 ${\pm}$ 20.5세로 두 군 간에 연령의 유의한 차이는 없었다(p = 0.081). Toxocara ELISA 양성군에서 남성의 비율은 76.7%, 음성군에서 47.3%로 양성군에서 유의하게 높았다(p < 0.01). 혈청 총 호산구 수($cells/{\mu}L$)는 Toxocara ELISA 양성군 2,325 ${\pm}$ 361, 음성군 1,407 ${\pm}$ 249로 양성군이 유의하게 많았고 (p = 0.038), 총 IgE (IU/mL)는 Toxocara ELISA 양성군 2,089 ${\pm}$ 196, 음성군 984 ${\pm}$ 199로 양성군이 유의하게 높았다(p < 0.01). Df 양성률은 Toxocara ELISA 양성군 82.3%, 음성군 44.2%로 양성군이 유의하게 높았으며(p < 0.01) Dp 양성률은 Toxocara ELISA 양성군 53.2%, 음성군 42.3%로 두 군 간에 유의한 차이는 없었다(p = 0.224). 폐(p < 0.01)와 간(p < 0.01)의 호산구 침착 및 익히지 않은 소의 간 또는 고기를 섭취한 비율(p < 0.01)은 Toxocara ELISA 양성군에서 높았다. 그러나 폐와 간 침범 사이의 상관관계는 없었다(p = 0.272). 알레르기 천식(p < 0.01)과 비염(p < 0.01)환자의 비율은 Toxocara ELISA 음성군에서 높았다. 아토피는 Toxocara ELISA 양성군에서 유의하게 많았다(p < 0.01). 그리고 Toxocara ELISA의 흡광도와 총 IgE (r = 0.502, p < 0.01), Toxocara ELISA의 흡광도와 총 호산구 수(r = 0.256, p = 0.015) 간에 양의 상관관계가 있었다. 그리고 Df에 대한 특이 IgE가 Dp보다 의미있게 높은 점은(p < 0.01) 포항 지역의 톡소카라증에서 개회충 항원과 Df항원 간의 유사성이 Dp 보다 클 것이라는 것을 시사하고 있다. 결론: 포항 지역의 톡소카라증은 알레르기 천식 또는 비염이 없는 경우가 더 많고 집먼지진드기 중 Df항원에 대한 특이 IgE가 Dp보다 의미있게 높다는 특징을 보이고 있다. 이러한 특징들은 향후 호산구증가증 환자에서 톡소카라증을 진단함에 있어서 유용한 임상적, 혈청학적 소견이 될 수 있을 것으로 생각된다.

Keywords

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