Adhesion of Cercaria (Larva of Helminth Parasites) to Host by Lectins- carbohydrates bonds as a Model for Evaluation of Schistosoma Entrance Mechanisms in Cercarial Dermatitis
Author(s):
Message:
Abstract:
Background
Cercariae (larva of helminth parasites) are covered by a thick glycocalyx coat, which serves as an osmotic pro tection during their free existence, and contain carbohydrates conjugated as glycoproteins, glycolipids and mu co polysaccharides. Although, limited studies have been made on life cycle of cercariae from fresh water snails, however, car bo hydrate studies on cercariae have not been done in Iran so far. This study was made to determine the cercariae speci fica tions from Lymnaea gedrosiana and evaluation of surface carbohydrates as receptors for host lectins in a host-parasite rela tionship system as a model in human schistosomiasis including cercarial dermatitis in Khuzestan Province.
Methods
For this purpose, snails were collected from Dezful region in Khuzestan Province and cercariae were obtained by shed ding method and identified by valuable keys. Experimental infection was established in the Culex pipiens (Culicidae mos quitoes) larvae for further identification and mode of adhesion. To detect the mode of adhesion, surface carbohydrates of cercariae were detected by lentil (Lens culinaris) lectins.
Results
Examined snails were infected with xiphidiocerceria of trematodes and metacercariae were obtained from Culex pipiens. Also, Mannose monosaccharides- CH2OH (CHOH) 4CHO - were detected particularly on the glands of cercariae.
Conclusion
Adhesion of cercariae to their host by lectins-carbohydrates bonds is the first stage of host-parasite relation ship. This phenomenon could be happened for animal schistosome’s cercaria in cercarial dermatitis.
Language:
English
Published:
Iranian Journal of Public Health, Volume:37 Issue: 2, Summer 2008
Page:
59
magiran.com/p521609  
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یک‌ساله به مبلغ 990,000ريال می‌توانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
  • حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران می‌شود.
  • پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانه‌های چاپی و دیجیتال را به کاربر نمی‌دهد.
دسترسی سراسری کاربران دانشگاه پیام نور!
اعضای هیئت علمی و دانشجویان دانشگاه پیام نور در سراسر کشور، در صورت ثبت نام با ایمیل دانشگاهی، تا پایان فروردین ماه 1403 به مقالات سایت دسترسی خواهند داشت!
In order to view content subscription is required

Personal subscription
Subscribe magiran.com for 50 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!