Haematological changes in Nile tilapia experimentally infected with Enterococcus sp./Alteracoes hematologicas em tilapia do Nilo infectada experimentalmente com Enterococcus sp

Haematological changes in Nile tilapia experimentally infected with Enterococcus sp./Alteracoes hematologicas em tilapia do Nilo infectada experimentalmente com Enterococcus sp

This study evaluated the haematological changes in Nile tilapia experimentally infected with 1 x [10.sup.3] and 1 x [10.sup.6] colony-forming units (CFU)/mL of Enterococcus sp. in the swim bladder. The experiment consisted of four treatments in triplicates: non-injected fish (NI); fish injected with...

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Bibliographic Details
Published in:Brazilian journal of biology Vol. 68; no. 3; pp. 657 - 661
Main Authors: Martins, M.L, Mourino, J.L.P, Amaral, G.V, Vieira, F.N, Dotta, G, Jatoba, A.M.B, Pedrotti, F.S, Jeronimo, G.T, Buglione-Neto, C.C, Pereira, Jr., G
Format: Journal Article
Language:English
Published: Association of the Brazilian Journal of Biology 01-08-2008
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Summary:This study evaluated the haematological changes in Nile tilapia experimentally infected with 1 x [10.sup.3] and 1 x [10.sup.6] colony-forming units (CFU)/mL of Enterococcus sp. in the swim bladder. The experiment consisted of four treatments in triplicates: non-injected fish (NI); fish injected with 1 mL of sterile saline solution 0.65% (SAL); fish injected with 1 x [10.sup.3] and 1 x [10.sup.6] CFU/mL of Enterococcus diluted in 1 mL sterile saline. Twenty-four hours after injection, the fish were anesthetized and the blood collected. The haematological tests included red blood cell (RBC) and white blood cell (WBC) counts, hematocrit, number of total thrombocytes, and differential counting of WBC. Fish injected with 1 x [10.sup.6] CFU/mL of Enterococcus showed a higher number of thrombocytes than the other treatments. White blood cell and lymphocyte numbers increased significantly in fish injected with 1 x [10.sup.6] CFU/mL of Enterococcus when compared to non-injected control. There was significant increase in the number of neutrophils in saline injected fish and reduced number of monocytes after injections with 1 x [10.sup.6] CFU/mL of Enterococcus. Hematocrit increased in fish injected with 1 x [10.sup.3] and 1 x [10.sup.6] CFU/mL of Enterococcus.
ISSN:1519-6984