The effects of ichthyophthiriasis on some haematological parameters in common carp

Authors : Malgorzata WITESKA, Elzbieta KONDERA, Katarzyna LUGOWSKA

Pages : 267-271

View : 10 | Download : 2

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The present study examined the haematological effects of ichthyophthiriasis in common carp. Blood was collected from 4 groups of juvenile carp: 1. healthy; 2. with minor symptoms of ichthyophthiriasis; 3. with severe symptoms of ichthyophthiriasis insert ignore into journalissuearticles values(moribund);; survivors of ichthyophthiriasis after a 3-week recovery period. Blood was subjected to a standard haematological procedure and the following parameters were evaluated: haematocrit insert ignore into journalissuearticles values(Ht);, haemoglobin concentration insert ignore into journalissuearticles values(Hb);, erythrocyte insert ignore into journalissuearticles values(RBC); and leukocyte insert ignore into journalissuearticles values(WBC); counts, mean cell volume insert ignore into journalissuearticles values(MCV);, mean cell haemoglobin insert ignore into journalissuearticles values(MCH);, and mean cell haemoglobin concentration insert ignore into journalissuearticles values(MCHC);. The differential leukocyte count and thrombocyte count were calculated using stained blood smears. No change in Ht or Hb, but a significant decrease in RBC compensated by an increase in MCV and MCH were observed. Fish with minor symptoms of disease had a significant increase in WBC insert ignore into journalissuearticles values(167.4 × 103/mL); without an alteration in the differential count, as compared to the controls insert ignore into journalissuearticles values(93.3 × 103/mL);, while those with severe symptoms had a significant decrease in WBC insert ignore into journalissuearticles values(48.4 × 103/mL); accompanied by lymphopenia, and an increase in neutrophil and monocyte contribution. After 3 weeks of recovery WBC returned to a level similar to that in the controls insert ignore into journalissuearticles values(89.5 × 103/mL);. In all the parasite-infested fish metabolic activity of phagocytes was significantly reduced, as compared to the controls. In the fish with severe symptoms of disease thrombocytosis and hypercoagulability were observed.
Keywords : Key words Blood, Cyprinus carpio, fish, Ichthyophthirius multifiliis