Effects of fluconazole based medicated feed on haemato-immunological responses and resistance ofLabeo rohitaagainstSaprolegnia parasitica

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Fluconazole (FLZ) is a new azole antifungal drug having no earlier record of its utilization for the treatment of fish diseases. A 55-days experiment was carried out to delineate the role of FLZ based medicated feed on haemato-immunological responses and prevention of fungal infection in Labeo rohita fingerlings. Three hundred and sixty fingerlings were randomly distributed into four experimental groups in triplicates. Four iso-caloric and iso-nitrogenous purified medicated feeds were prepared with 0, 100, 200 and 300 mg FLZ 100 g−1 feed. Haemato-immunological parameters like erythrocyte counts (EC), haemoglobulin (Hb), leucocyte counts (LC), packed cell volume (PCV), mean corpuscular haemoglobin (MCH), mean corpuscular volume (MCV), mean corpuscular haemoglobin concentration (MCHC), nitro-blue tetrazolium (NBT), albumin, globulin, total plasma protein were studied. The present study revealed that the continuous feeding of FLZ based feed for 15–30 days significantly (P < 0.05) increases the erythropoiesis, heme-synthesis, as well as the leucocytosis in rohu. However, all the doses exhibited equal protection from the infectious S. parasitica after 45 days of continuous feeding.

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