The aim of our study was to evaluate the effects of chitosan as immune stimulator on some hematological parameters and stress resistance in rainbow trout. Nine hundred rainbow trout (with initial body weight of 25 ± 0.1 g) were obtained from a local farm and acclimated to the laboratory conditions for one week. After that fish were randomly divided into four groups in three replicates. Each gro...

The relationship between helminths and the host is built on a subtle molecular biological basis. Their pathogenic effect characterized by mechanical, toxic, inoculating organism state of reactivity his organism, immunological allergic reorganization. It has been proved that species Dirofilaria immitis are most nematodes this genus because localization imaginal stage parasite causes more complex...