Costia Necatrix

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Costia Necatrix

a protozoan of the family Bodonidae of the class Flagellata. The body is in the form of a droplet, measuring 6–20 μm long and 3–10 μm wide. The nucleus is vesiculate, and there are four flagellae of various lengths. This protozoan is found everywhere. It is a dangerous parasite of various types of fish, especially of the fry, and causes the serious disease costiasis. Under unfavorable living conditions, Costia necatrix forms cysts.

REFERENCE

Bauer, O. N., V. A. Musselius, and lu. A. Strelkov. Bolezni prudovykh ryb. Moscow, 1969.

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