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Volume 2017, Article ID 4268926, 7 pages
Research Article

Sex-Related Differences in Hematological Parameters and Organosomatic Indices of Oreochromis niloticus Exposed to Aflatoxin B1 Diet

1The Open University of Tanzania, P.O. Box 23409, Dar es Salaam, Tanzania
2School of Biological Science, University of Nairobi, P.O. Box 30197, Nairobi 00100, Kenya
3Department of Veterinary Anatomy and Physiology, University of Nairobi, P.O. Box 30197, Nairobi 00100, Kenya
4Department of Biology, Catholic University of Eastern Africa, P.O. Box 62157, Nairobi 00200, Kenya

Correspondence should be addressed to Esther Marijani; moc.liamg@inajiramrehtse

Received 9 June 2017; Accepted 17 August 2017; Published 2 October 2017

Academic Editor: Luis T. Ortiz

Copyright © 2017 Esther Marijani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A 24-week feeding experiment was conducted to assess whether males and females of Oreochromis niloticus exhibit differences in their hematological responses and organosomatic indices to dietary AFB1 contamination. Triplicate groups of O. niloticus (initial body weight: 24.1 ± 0.6 g) were fed with four diets (Diets 1 to 4) containing 0, 20, 200, and 2,000 μg AFB1 kg−1. A significant decrease () in hemoglobin (Hb), red blood cells (RBC), and hematocrit (Hct) was observed in AFB1 exposure groups, with the lowest levels recorded in the 2000 μg AFB1 kg−1 treatment. A significant increase in mean white blood cells (WBC), neutrophils, and lymphocytes was observed in AFB1 exposure groups. No sex-related differences in RBC, WBC, lymphocytes, monocytes, and neutrophils levels were observed. However, hemoglobin and hematocrit values for female O. niloticus were significantly lower than those for male O. niloticus. Organosomatic indices showed that the relative liver, kidney, and spleen weights were significantly higher () in the AFB1 supplemented group than in the control group. However, the effect of aflatoxin on organosomatic indices does not depend on sex but rather depends on the dose of aflatoxin in the diet. These results provide useful information for monitoring changes in the health status of male and female O. niloticus.