Roesno Darsono, - (2012) Perkembangan Tingkat Kekebalan Ayam Yang Dipapar Eimeria tenella Berdasarkan Perubahan Patologi Anatomi, Produksi Ookista Dan Titer IgA Dan IgG. Thesis thesis, UNIVERSITAS AIRLANGGA.

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Abstract

The development of immunity level of Eimeria tenella exposured chicken was examined based on pathology anatomy changes, oocysts production, lgA and lgG titres. Eighty broilers were divided into four groups and each group was eonsisted twenty. Then, every group was infected E. tenella for three times, each infection was administered a once two weeks for each age group, except control group was not infected anything (placebo). Pathological changes and clinical signs were dramatically decline on the st,cond and third infections compared with first infection for each age group. The number schizont of the second and third infections was lower than the first infection for each age group. Similarly, oocysls production of second <.tnd third infections was lower than first infection (p< 0.01 ). In contrast, optical density of !gO of first infection was higher than second infection for each age group. Then, optical density of ig G of second inibction was lower than third infection for 3 weeks and 4 weeks olds group, except in 2 weeks old group that optical density of second infection was higher than third infection (p<O.Ol ). Moreover, the patern of optkai density oflgA of second and third infection was higher than first infection and uninfected. Optical density of IgA of first infection was not significantly different with second infection for 2 weeks and 3 weeks old groups, but both t1rst and second infection were lower than third infection for < wo weeks old group and higher than the third for three weeks old group. Optical density of lgA of first infection >vas higher than the second and third infection for 4 weeks old group (p<O.Ol ), whereas optical density of IgA of second infection was not significantly different with third in.tection. Several above variables could be used as representation of immunity level in the age level of E. tenella exposured chicken.

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