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Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens

Ryad H. Khalil, Hanaa M. El-Hofy, Manal M. Yehya, Khalid M. Selim.

Abstract
We studied the effects of garlic (allicin) which used as immunostimulant on some physiological, biochemical parameters, survival rate, histopathological studies and bacteriological characteristics of sea bream. Fish (50 ± 5 g/fish) were assigned to 3 treatments, with three replicates each. Treatment groups had a different level of allicin (Garlen®), (1 and 2 gm. /kg feed) added to their diets; the control group diet was free from garlic. Diets also contained 25% crude protein (CP) and were administered at a rate of 3% live body weight twice daily for 8 weeks. At the end of 7th week ten fish from each treatment group and from the control were artificially infected by intra peritoneal injection with 0.2 ml of culture suspension of pathogenic Vibrio alginolyticus previously adjusted to 104.Results showed that the differential leucocytic count, phagocytic activity, phagocytic index, serum lysozomal and bactericidal activity increased significantly with increasing levels of allicin. Plasma Cortisol level decreased significantly with increasing levels of allicin. Total protein and globulin were also increased significantly in the treated groups than the control group. All bacterial counts decreased significantly in treated groups than the control in all weeks. Treated groups had lower mortality rate than the control group during the challenge test. Histopathological studies of control group revealed congestion in blood vessel of gills, liver, spleen and kidney with, hyperplasia of epithelial cells between secondary lamellae led to fusion, edema and lifting of the lamellar epithelium of secondary lamellae in gills, vacuolar degeneration of hepatocytes, with infiltration by monocytes in liver, dilation of blood vessel, severe depletion of white bulb ,edema, and hyperactivation of melanomacrophage center in spleen ,necrosis of renal tubules epithelium, and inter renal haemopoietic tissues with atrophied glomerular tuft and widening of bowman capsules in kidney. Moderate to minimal histopathological changes appeared in all organs in groups received (Garlen®) according to its dose.

Key words: allicin, sea bream, bactericidal activity, Cortisol, histopathology.


 
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How to Cite this Article
Pubmed Style

Khalil RH, El-Hofy HM, Yehya MM, Selim KM. Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens. AJVS. 2014; 41(1): 1-18. doi:10.5455/ajvs.152049


Web Style

Khalil RH, El-Hofy HM, Yehya MM, Selim KM. Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens. http://www.alexjvs.com/?mno=152049 [Access: August 21, 2018]. doi:10.5455/ajvs.152049


AMA (American Medical Association) Style

Khalil RH, El-Hofy HM, Yehya MM, Selim KM. Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens. AJVS. 2014; 41(1): 1-18. doi:10.5455/ajvs.152049



Vancouver/ICMJE Style

Khalil RH, El-Hofy HM, Yehya MM, Selim KM. Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens. AJVS. (2014), [cited August 21, 2018]; 41(1): 1-18. doi:10.5455/ajvs.152049



Harvard Style

Khalil, R. H., El-Hofy, H. M., Yehya, M. M. & Selim, K. M. (2014) Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens. AJVS, 41 (1), 1-18. doi:10.5455/ajvs.152049



Turabian Style

Khalil, Ryad H., Hanaa M. El-Hofy, Manal M. Yehya, and Khalid M. Selim. 2014. Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens. Alexandria Journal of Veterinary Sciences, 41 (1), 1-18. doi:10.5455/ajvs.152049



Chicago Style

Khalil, Ryad H., Hanaa M. El-Hofy, Manal M. Yehya, and Khalid M. Selim. "Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens." Alexandria Journal of Veterinary Sciences 41 (2014), 1-18. doi:10.5455/ajvs.152049



MLA (The Modern Language Association) Style

Khalil, Ryad H., Hanaa M. El-Hofy, Manal M. Yehya, and Khalid M. Selim. "Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens." Alexandria Journal of Veterinary Sciences 41.1 (2014), 1-18. Print. doi:10.5455/ajvs.152049



APA (American Psychological Association) Style

Khalil, R. H., El-Hofy, H. M., Yehya, M. M. & Selim, K. M. (2014) Some Biochemical and Immunological Changes Associated with Use of Garlic Extract (Allicin) in Combating Some Fish Pathogens. Alexandria Journal of Veterinary Sciences, 41 (1), 1-18. doi:10.5455/ajvs.152049





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