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Year :	2005
Tome :	156
Volume :	10
Pages :	498-502
Title :	Antioxidant status of broiler chickens, infected with Eimeria acervulina
Authors :	V. KOINARSKI, N. GEORGIEVA, V. GADJEVA and P. PETKOV
Summary :	The antioxidant status of broiler chickens (Cobb 500 hybrids) experimentally infected with E. acervulina was monitored via determination of blood plasma malonyl dialdehyde (MDA) reactive products, the activities of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT), as well as blood carotene, vitamin A and vitamin C concentrations. The results of the experiment showed a statistically significant increase of MDA concentrations (a marker of radical-induced damage) in E. acervulina-infected birds compared to healthy chickens (p<0.05). A decreased SOD activity was also observed in infected birds (p<0.001), whereas significant increase of CAT activities were obtained (p<0.001). Carotene, vitamin A and vitamin C concentrations were dramatically reduced in infected chickens (p<0.001, p<0.01 and p<0.05 respectively). The observed deviations in studied enzymes and non-enzymatic parameters evidence the occurrence of oxidative stress following the infection and impaired antioxidant status of broiler chickens infected with E. acervulina. The observed changes in small intestine, the oocyst production and the economical parameters (weight gain and feed conversion ratio) were indicative for a severe infection, in which the oxidative stress was also involved during pathogenesis.
Keywords :	E. acervulina - oxidative stress - MDA - SOD - Catalase - Vitamin A - Vitamin C.
Correspondence :	V. KOINARSKI
Adress :	Department of Veterinary Microbiology, Infectious and Parasitic Diseases, Faculty of Veterinary medicine, Trakia University, 6000 Stara zagora, Bulgaria. e-mail : [email protected] and [email protected]
Link :	pdf

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