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Morphometric differentiation between camel and sheep strains of Echinococcus granulosus using computer image analysis
Gholamreza Mowlavi1, Mitra Salehi, Mohammadreza Eshraghian
1Department of Medical Parasitology & Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Objective:
To find importance of morphometric criterion of larval rostellar hook of Echinococcus granulosus (E. granulosus) and the easy and reliable method for distinguish sheep and camel strains in epidemiologic studies.
Methods:
Larval rostellar hooks (n=1860) of 31 camel and sheep isolates in Iran, which already had been characterized by PCR, were carefully processed by computerized imagime analysis system (CIAS) and acquired data about rostellar hooks were analyzed using software SPSS.
Results:
Measurement analysis of rostellar hooks [mean length (24.23±3.12) μ m] indicated that length of the large hook was a remarkable parameter for strain differentiation. Data analysis demonstrated that CIAS could be used as a reliable tool to distinguish camel from sheep strains with high sensitivity (95.2%) and specificity (91.5%).
Conclusions:
CIAS as a specific, sensitive, economic, fast, and reliable means might be used for differentiation of E. granulosus strains. Although perimeter and area were measured by digital technology, they were not shown as discriminative criterion as total hook length did.
