roteases, including cysteine-, serine-, threonine-, aspartate-, and metallo-proteases, are a group of enzymes that have the catalytic ability to hydrolyze or digest peptide bonds of proteins. Proteases play important roles in host invasion, hemoglobin degradation, transformation and immune invasion of schistosomes. The gut cathepsin B of all schistosomes including S. japonicum, S. mansoni and S...

This study aims to develop an alternative field-based approach interrupt the life cycle of O. viverrini. The effects temperature, salinity, acidity, ultraviolet A, B, C radiation, and combinations these physicochemical factors on loss infectivity Opisthorchis viverrini cercariae were analyzed determine values required for 50 95 % lethal concentrations (LC50 LC95) period infection success (LI50 ...

to funistic survey of the cercariae of melanoides tuberulata (fresh water snail) 1540 m.tuberculata were collected from various streams, swamps, ditches and canals in the central area of khouzestan province in the south west of iran. infected snails, 46 (2.9%), were isolated and cercariae were obtained by emerging or crushing methods and then measuring and drawing were made from specimens. in s...

The attenuated cercariae model is such a good one for facilitating the identification of antigens capable of evoking the protective host immune response which may be the first step towards the production of an effective anti-schistosomal vaccine. Although it is well known that irradiated cercariae is an effective vaccine against schistosomes in the experimental model, the actual effect of irrad...

Haplorchis  taichui is parasitic heterophyidae(trematoda) which lives in the intestinal mucosa of its main host and producing heterophyidosis,which is a zonootic diseases.subsequent to the authors, provious  studies which were made on parasit,s lift  cycle in nature in Khuzestan province,Iran,this experimental study was performed with the aim of establishing the parasite,s lift cycle in laborat...

Extracts of Schistosoma mansoni cercariae caused increased vascular permeability and edema if administered to CBA/Ca mice by intradermal injection. Percutaneous infection with cercariae over the skin site at which cercarial homogenate (CH) had been injected intradermally resulted in a significant increase in the infectivity of S. mansoni compared with that shown by worm recovery from control an...