International Journal of Modern Biology and Medicine
ISSN: 2165-0136 (online)Search Article(s) by:
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Current Issue: Vol. 9 No. 1or Keyword in Title:
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Table of Content for Vol. 9 No. 1, 2018

Semi Analytic Method for Solving HIV/AIDS Epidemic Model
Peter O. J , O. B Akinduko
      
 PP. 1 - 8
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ABSTRACT: In this paper, we present a deterministic model on the transmission dynamics of Hiv/Aids. Differential Transform Method (DTM) is employed to attempt the series solution of the model. The validity of the DTM in solving the model is established by using the computer in-built classical fourth-order Runge-Kutta method. The comparism between Differential Transform Method solution and Runge-Kutta(RK4) were performed which were found to be efficient, accueare and rapidly convergence.


Effect of Seasonal Changes on Physiological and Histological Characteristics of Nile tilapia (Oreochromis niloticus) Inhabited Two Different Freshwater Habitats
Ali A. Al-Halani
      
 PP. 9 - 28
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ABSTRACT: The present investigation aimed to assess the effect of seasonal changes on physiological and histological characteristics of Nile tilapia (Oreochromis niloticus) inhabited two different freshwater habitats (Damietta branch of Nile River and Ammar Drain) over the period from March 2015 to February 2016. Samples of fish blood and tissues were seasonally collected and somatic indices, hematological parameters (Hb, RBCs, Ht, WBCs), oxidative stress biomarkers (SOD, CAT), and histopathological changes (in skin, muscles and gonads) were investigated. Studied parameters showed significant seasonal changes in investigated localities. However, their levels were higher in Ammar Drain than those of other site. Biomarkers revealed that water contaminants led to negative impacts on the physical status, growth indicators, hematological parameters, enzyme activity, and histological features of fish. Nile tilapia showed varying physiological responses in both studied ecosystems. The hematological and biochemical portrait of fish blood indicated proper physiological adaptations to the polluted water of Ammar Drain. The vast majority of the hematological parameters recorded lower levels in Ammar Drain than in River Nile. There were significant increases in WBC counts in Nile tilapia inhabiting Ammar Drain than those of River Nile. This may reflect the immunological challenge facing fish in such deteriorating environment. The present investigation indicated overall lower plasmatic CAT and SOD activities of Nile tilapia from Ammar Drain compared to those sampled from River Nile. Different water pollutants are the likely major source of the physiological anomalies in fish. Accordingly, the decreased enzyme activities in fish inhabiting Ammar Drain seems likely to indicate an insufficient response to overcome the prominent oxidative stress. Moreover, plasmatic CAT and SOD activities of Nile tilapia attained clear seasonal variation in the two investigated ecosystems. The fish sampled from Ammar Drain exhibited some histopathological signs showing alterations in the skin, muscles and oogenesis or spermatogenesis of Nile tilapia