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Comparative study on two commercial hot vaccinal strains of IBDV [electronic resource].

By:

El-Ebiary, Elham A

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Language: English Summary language: Arabic Description: p.661- 676Other title:

دراسة مقارنة بين عترتين شديدة الضراوة من اللقاحات الحية لمرض الجمبورو [Added title page title]

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Beni-Suef veterinary medical journal, 2001 v. 11 (2B) [electronic resource].

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In: Beni-Suef Veterinary Medical Journal 2001.v. 11(2B)Summary: The comparative effect of two hot vaccinal strains of IBDV was conducted by vaccination of chicks with various minimal dose requirements of two commercially available hot IBD vaccine (IBD-Blen and 228E vaccine). The three different titres were 10²· EID5o/dose, 102.5 EID/dose and 10³· EID/dose. The immune response was determined by challenging birds with a known virulent IBD virus and by measuring of ELISA antibody titre against IBD virus following vaccination. Other parameters were also considered such as protection rate, bursal index and the immune suppressive effect of IBD strains was measured using NDV vaccine. The high titre dose of3.5 log10 Nobilis 228E and IBD-Blen vaccines could protect 100% of chickens, the lower titre dose 2 log is still protective against virulent challenge IBD virus causing minimal bursal lesion.

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The comparative effect of two hot vaccinal strains of IBDV was conducted by vaccination of chicks with various minimal dose requirements of two commercially available hot IBD vaccine (IBD-Blen and 228E vaccine). The three different titres were 10²· EID5o/dose, 102.5 EID/dose and 10³· EID/dose. The immune response was determined by challenging birds with a known virulent IBD virus and by measuring of ELISA antibody titre against IBD virus following vaccination. Other parameters were also considered such as protection rate, bursal index and the immune suppressive effect of IBD strains was measured using NDV vaccine. The high titre dose of3.5 log10 Nobilis 228E and IBD-Blen vaccines could protect 100% of chickens, the lower titre dose 2 log is still protective against virulent challenge IBD virus causing minimal bursal lesion.

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