01795cab a2200289Ia 4500001000800000003000600008008004100014040000800055041001300063100001800076240007100094245008000165246013100245300001600376504002500392520078600417546002301203650002601226650002201252650002301274650000501297700002101302700001901323700001301342773007301355856007701428u202884SIRSI120605s2011    ua     ss b         eng d  aEAL  aengbara1 aHegazy, A. M.10aZagazig veterinary journal, 2011 v. 39 (2)h[electronic resource].10aEvaluation or sonicated E. coli vaccine in chickensh[electronic resource].15aتقييم لقاح الميكروب القولوني المعامل بالموجات فوق الصوتية في الدجاج.  aP. 163-170.  aIncludes references.  aLaying hens were vaccinated with sonicated E. coli 078 vaccine at 20 and 25 week old, the immune response was estimated by ELISA and IHT test in hens, eggs and hatched chicks after 1st, 2nd, 3rd and 4th weeks post vaccination and hatching. The titer was measured by ELISA in hens ranged from 8.86-9.84. While GMT titer ranged from 1.99-2.71, while in eggs was ranging from 8.1-8.86 and from 1.32-2.43. In chicks ranged from 8.81-5.79 and 1.32 -2.1 respectively. The protection by sonicated vaccine with homologous strain at 14,21 and 28 day post hatching was 80, 60 and 50% while it was 70, 50 and 50% when challenge with heterologus strain respectively. On the other hand body weight gain and feed conversion rate significantly improved than that of control non vaccinated groups.  aSummary in Arabic. 0aChickensxVaccination 0aEscherichia coli. 0aChickensxDiseases 0a1 aLebdah, M. A. A.1 aNasef, Soad A.1 aEhab, A.0 tZagazig Veterinary Journal. g2011.v.39(2)x1110-14587nasswu18986040uhttp://nile.enal.sci.eg/EALE/2011/ZVJ/3911/2/163.pdfzFull Text Article.