Additions effect of vitamins A and E and vaccination with Eimeria maxima locally produced vaccine in some physiological characters of broilers

Abstract

Abstract The aim of this study was to investigate the roles of vitamin A and E in improvement of some physiological characters in the birds which were vaccinated with locally produced Eimeria maxima vaccine (8000 attenuate oocysts/ ml/ chick). At tenth days of the age two hundred and ten day old lohmann male chicks were divided to seven group and were treated as follows: Group 1: non vaccinated.Group 2: non vaccinated. Group 3: vaccinated only. Group 4: vaccinated and given vitamin A 6 mg /kg/ feed.Group 5: vaccinated and given vitamin E 300 mg / kg /feed. Group 6: vaccinated and given vitamin A 6 mg/ kg / feed and vitamin E 300 mg / kg/ feed.Group 7: Given 8000 viable oocyst / ml / chick.The Group 2, 3, 4, 5, 6, 7 were challenged at thirty eight days of the age with 40000 viable oocysts of Eimeria maxima per chick.The packed cell volume, oocysts count in the jejunum content, adenosine deaminas enzyme activity in serum and in the jejunum tissue extracte, was determined one week after vaccination, one day before challenge and one week after challenge. The protein and fat digestibility ratio and protection ratio were estimated one week after challenge. Results revealed that the addition of vitamin A and E to the feed of the birds which vaccinated with locally produced Eimeria maxima vaccine gave significant (P<0.05) reduce in oocysts count in the jejunum and significant ( P<0.05) increase in packed cell volume, adenosine deaminas enzyme activity in serum and in the jejunum tissue extracted especially after challenge. The protein, fat digestibility and the protection ratio were improved.