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CHEMOTAXIS OF MARINE FISH PARASITE CRYPTOCARYON IRRITANS
Author(s): 
Pages: 1003-1007
Year: Issue:  4
Journal: Oceanologia et Limnologia Sinica

Keyword:  chemotaxisCryptocaryon irritansserummucusChinese medical herb;
Abstract: The chemotaxis of Cryptocaryon irritans theronts was studied by a new method established in our laboratory using various substances including natural herbs.The results show that the chemotaxis increased with incubation time and reached the saturation in 30 min.The highest chemotaxis was recorded at 28℃.The theronts showed strong chemotaxis to the serum and mucus of various teleost in the fish muscle homogenates but in the stomach,intestines,and liver homogenates as well as small molecular substances such as carbohydrates and amino acids.However,much stronger chemotaxis of C.irritans theronts was found in the sera of infected teleost(P<0.01).In addition,18 Chinese medical herbs were used to study the repellent effect to C.irritans theronts and 6 of them showed repellent effect to C.irritans theronts.The results are conducive to a better understanding to the pathogenesis of C.irritans as well as to the prevention and treatment of"white-spot disease".
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