alireza keykhosravi

Leishmaniasis as a zoonosis disease, occurs in three forms of cutaneous, mucocutaneous, and visceral (kala-azar). The causative agent of this disease is a protozoa of the Leishmania genus, which is commonly transmitted by species of sand flies. Given that explanation of an effective control strategy for vector-borne diseases requires identification of the fauna of their vectors, the present study was carried out to detect the fauna of Leishmaniasis vectors in Khusf county.
In this cross-sectional study, sand flies were captured using sticky traps in different parts of Khusf county from May 2015 to October 2015, Then, the species of female samples were mounted and identified using valid species identification key.
In this study, from total 370 collected sand flies samples, 238 sand flies were related to animal areas and 132 sand flies were from human areas. Out of 115 female sand flies, Phlebotomus sergenti with frequency of 27.82% and Sergentomyia dentata with frequency of 34.78%, were reported as the dominant species in the region.
According to the findings of this study, the dominant species in the region was among the vectors of urban cutaneous leishmaniasis, and considering the presence of Leishmania tropica in the region, the health system of this county must consider required care for the control of cutaneous leishmaniasis disease.

The toxic impact of copper sulfate in lethal and sublethal concentrations was investigated on gill of grass carp, Ctenopharynogodon idella. In this investigation, 27 specimens were used as control group and three treatment groups were treated with 2.5 and 5mg/l of copper sulfate. Gill samples were collected from each treatment after 96hr and lesions were analyzed by light microscopy. In histopathological study of the gill tissues, hyperplasia was clearly obvious in treatment specimens. In all of the treated groups, heavy gill-mucus response was observed, which indicate a direct relation with high concentrations. Also, in histological study of the gill, epithelial cells faced to hyperplasia, which increased with high copper densities. Primary lamellar cells wrinkling and also changing in formation were observed in chloride cells. This lesion enhanced in higher densities and in concentrations of 2.5 and 5mg/l, primary and secondary lamellar epithelial cells were degenerated.