بررسي آلودگي هاي انگلي سبزيجات در استان تهران ( قبل و بعد از شست و شو )

Survey of Parasitic Contaminations in Vegetables in Tehran Province ( Before and After Washing)

This study was performed in order to determine the contamination level of the vegetables in some plantation farms of Pakdasht ,Tehran. and the influence of processing and deterging vegetables during the months May - July 2007.In this study, 403 samples of vegetables : leek, parsley, spinach, dill, cress from 37 plantation farms pre-deterging were tested and 250 samples of vegetables from the same type after deterging and processing were evaluated for parasitic contamination by the time-sedimentation method continued by concentration through centrifuge and floatation techniques. The findings of this study showed that from 403 samples of vegetables from Pakdasht farms, 9 samples (2.2%) were contaminated to human parasites, including: 4 samples by Ascaris lumbricoides ova (1%) in leek, 4 samples contaminated to ova of Taenia (1%) in parsley and 1sample contaminated to ova of Trichostrongylus (0.2%) in spinach, and there was no other contamination observed. In the experimented samples, there was a high amount of vegetable factors (52 samples) and types of free nematodes (62 samples), insects (42 samples), tick and mite (4samples) observed, but the lab tests showed that a large number of these factors was removed or decreased after deterging and processing. Since eliminating parasitical contaminations , vegetable factors , different types of herbal soil nematodes , insects in processing and packing workshops is possible only by full washing, therefore promoting the correct consumption attitude in the forms of "ready-to-use" and packages is recommended.