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| 003 | EG-GiCUC | ||
| 005 | 20250223032412.0 | ||
| 008 | 191008s2019 ua do f m 000 0 eng d | ||
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_aEG-GiCUC _beng _cEG-GiCUC |
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| 041 | 0 | _aeng | |
| 049 | _aDeposite | ||
| 097 | _aPh.D | ||
| 099 | _aCai01.10.03.Ph.D.2019.Ah.E | ||
| 100 | 0 | _aAhmed Shawky Helmy Khalifa | |
| 245 | 1 | 0 |
_aEpidemiological and molecular studies on newcastle disease virus in chicken flocks / _cAhmed Shawky Helmy Khalifa ; Supervised Sahar Ahmed Zouelfakar , Manal Afifi Ali , Mohamed Khalifa Hassan |
| 246 | 1 | 5 | _aدراسات وبائ{u٠٦أأ}ة وجز{u٠٦أأ}ئ{u٠٦أأ}ة عن ف{u٠٦أأ}روس مرض الن{u٠٦أأ}وكاسل في قطعان الدجاج |
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_aCairo : _bAhmed Shawky Helmy Khalifa , _c2019 |
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_a243 P. : _bcharts , photographs ; _c25cm |
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| 502 | _aThesis (Ph.D.) - Cairo University - Faculty of Veterinary Medicine - Department of Animal diseases | ||
| 520 | _aIn the present study, a molecular epidemiological investigation was conducted to better understand the epidemiology of Newcastle disease virus (NDV) in the chicken farms in Egypt during the last 4 years from 2015 to 2018. A total of 114 positive Newcastle diseases (ND) from 442 chicken farms were suffering from problems such as mortality, respiratory signs, greenish diarrhea and nervous signs, Out of positive NDV flocks (114) 17 were infected with NDV only. A total of 7 NDV isolates recovered from different outbreaks were analyzed for in vivo pathogenicity, biological property and amplification of F cleavage site gene. Mean death time was (MDT: 40.5-59.5), Intracerebral Pathogenicity Index was (ICPI: 1.53-1.86) while the intravenous pathogenicity index was (IVPI: 2.01-2.35) and deduced amino acid sequences of the F0 proteolytic cleavage site (112RRQKR117) revealed that all 7 field isolates were velogenic isolates. Phylogenetic analysis showed that these isolates could be classified into velogenic group (genotype VIId) and one of them had been used to evaluate protective efficacy of 6 different vaccination programs of ND under lab condition in broiler chickens. Two hundred one-day-old commercial broiler chicks were divided into 8 groups (25 birds each). Groups 1, 2, 3 and 6 were vaccinated at 1 and 14 day- old with live attenuated vaccine (lasota) and group 2 and 3 were vaccinated at 1 and 6 day old with inactivated vaccine respectively | ||
| 530 | _aIssued also as CD | ||
| 653 | 4 | _alasota | |
| 653 | 4 | _aNewcastle disease virus | |
| 653 | 4 | _aPhylogenetic analysis | |
| 700 | 0 |
_aManal Afifi Ali , _eSupervisor |
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| 700 | 0 |
_aMohamed Khalifa Hassan , _eSupervisor |
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| 700 | 0 |
_aSahar Ahmed Zouelfakar , _eSupervisor |
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| 856 | _uhttp://172.23.153.220/th.pdf | ||
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_aAsmaa _eCataloger |
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_aNazla _eRevisor |
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| 942 |
_2ddc _cTH |
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_c74331 _d74331 |
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