نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده پزشکی، دانشگاه علوم پزشکی مشهد
2 استادیار گروه انگل شناسی و قارچ شناسی, دانشکده پزشکی, دانشگاه علوم پزشکی مشهد, ایران
3 استادیار گروه انگل شناسی و قارچ شناسی، دانشکده پزشکی، دانشگاه علوم پزشکی مشهد، مشهد، ایران.
4 آزمایشگاه انگل شناسی و قارچ شناسی، بیمارستان امام رضا
5 کارشناس مرکز بهداشت مشهد
6 استاد گروه انگل شناسی و قارچ شناسی، بیمارستان امام رضا، دانشکده پزشکی، دانشگاه علوم پزشکی مشهد
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Introduction: Cutaneous Leishmaniasis (CL) is a parasitic skin disease, endemic worldwide. Diagnosis primarily is based on clinical signs and microscopic observation of parasite on direct stained smears or tissue sections. However sensitivity of direct smear is rather high, but it depends on the quality of sampling, staining and the expert of Laboratory technician and responsible Medical Parasitologist for the test. However the sensitivity of direct smear is not as high as molecular methods. The aim of this study is to identify pseudo-positive and pseudo negative direct smears obtained from skin lesions suspected to CL by PCR method.
Methods & Materials: Among direct smears obtained from patients with suspicious skin lesions to CL who referred to Emamreza Hospital and Health Centers of Mashhad, 100 positive Giemsa-stained smears and 50 negative Giemsa-stained smears were collected. DNA extraction performed by scraping the stained smears, obtained from Patients with skin lesions. To perform PCR.
Results: Among DNA extracted from negative smears obtained in Health Centers, 28 % showed positive result for Leishmnia tropica. There was only one pseudo-positive smear among the reported positive smears. Among smears obtained from Hospital Lab., only one pseudo-negative without any pseudo-positive smears was observed.
Conclusion: Direct microscopy on stained smears is a good and accurate with high sensitivity laboratory method for diagnosis of Leishmaniasis, if sampling and preparation of the smear is proper and an expert microscopist using a standard microscope reports the result.
کلیدواژهها [English]