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_aEG-GICUC _beng _cEG-GICUC _dEG-GICUC _erda |
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| 049 | _aDeposit | ||
| 082 | 0 | 4 | _a636.089 |
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| 097 | _aM.Sc | ||
| 099 | _aCai01.10.19.M.Sc.2024.Mo.S. | ||
| 100 | 0 |
_a Mohamed Atef Abas Mohamed, _epreparation. |
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| 245 | 1 | 0 |
_aSeasonal Monitoring of Indoor Air Quality and Hygiene Score in Closed Hen House and Its Impact on Egg Production / _cBy Mohamed Atef Abas Mohamed; Under supervision of Prof. Dr. Zakia Attia Mohamed Ahmed, Prof. Dr. Mahmoud Abd-Elaty Mahmoud Khalf, Dr. Mohammed Abdelhameed M Kamal. |
| 246 | 1 | 5 | _aالرصد الموسمي لجودة الهواء الداخلي والدرجة الصحية لمسكن الدجاج البياض وتأثيره على إنتاج البيض / |
| 264 | 0 | _c2024. | |
| 300 |
_a96 pages : _billustrations ; _c25 cm. + _eCD. |
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| 336 |
_atext _2rda content |
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_aUnmediated _2rdamedia |
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_avolume _2rdacarrier |
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| 502 | _aThesis (M.Sc.)-Cairo University, 2024. | ||
| 504 | _aBibliography: pages 85-92. | ||
| 520 | _aClimate change poses considerable challenges to poultry farming, as it affects the microclimate and air quality in poultry houses. This study investigated the influence of seasonal climate variations on the indoor microclimate of a commercial laying hen house in Egypt and investigated the interplay between microclimate variations, production indices, and histopathological responses to accidental Newcastle disease virus (NDV) infection. Over three seasons (autumn, winter & spring), outdoor and indoor temperatures (Ta.C), relative humidity (RH %), air velocity (AV), and temperature/humidity index (THI) were systemically measured. Productivity indices, including the egg production percentage (EPP), egg weight (EW), average daily feed intake (ADFI), and feed conversion ratio (FCR), were assessed monthly. During an accidental NDV outbreak, humoral immune response (HIR), gross pathology, and histopathological lesions were evaluated. Results revealed that, the indoor temperatures closely mirrored the outdoor trends and significantly differed from the outdoor temperatures, except for April and May. A Positive correlations were observed between the outdoor and indoor front and back temperatures. The indoor RH% was notably affected by the outdoor RH%, especially in warm season. Indoor AV consistently lagged outdoor values. The outdoor THI significantly influenced the indoor front and back THI. The indoor microbiological analysis revealed significant differences in the total colony count and the back side total fungal count... The significant variations in EPP and EW between the front and back sides were with microclimate factors influencing these variations, except in April and May. Notably, AV had a significant positive effect on EW in the front (p = 0.006) and back sides (p = 0.001), while it negatively influenced (p = 0.027) EPP in back side .However, temperature, RH%, and THI could not serve as predictors for EPP or EW on either farm side. Importantly, the humoral immune response to NDV was consistent across microclimates. Histopathological examination revealed characteristic NDV-associated lesions, with no significant differences between front and back sides. These findings underscore the challenges posed by microclimate elements fluctuations, highlighting the need for optimizing indoor conditions to enhance laying performance by providing tailored environmental management strategies, particularly near cooling pads and exhaust fans, and reinforcing the importance of biosecurity measures under field challenges with continuous monitoring and adjustment. | ||
| 520 | _aالرصد الموسمي لجودة الهواء الداخلي والدرجة الصحية لمسكن الدجاج البياض وتاثيره على إنتاج البيض لتغييرالمناح دورا هاما في إنتاج دجاج البيض .لهذا أقيم العمل الحالي لاستيضاح تأثير تغيير المناخ في مصر (بفصول الخريف والشتاء والربيع) على جودة الهواء الداخلي (عناصر المناخ الدقيق ,تركيزغازالنشادر, الحمل الميكروبي بالهواء الداخلي للمسكن) في مناطق مختلفة داخل عنبر مزرعة الدجاج البياض المغلقة. كذلك تأثير الأختلاف في المناخ الدقيق بالمناطق المختلفة داخل مسكن البياض على مؤشرات الإنتاج ( نسبة أنتاج البيض , وزن البيضة بالجرام لكل دجاحة بياضة). بالإضافة لتاثيرهذة الأختلافات في المناخ الدقيق الداخلي بالمواقع المختلفة بالمسكن المغلق على رد الفعل المناعي(الإستجابة الخلطية) والتغيرات النسجية المرضية المرافقة للأصابة العارضة بعدوي فيروس النيوكاسل . | ||
| 530 | _aIssued also as CD | ||
| 546 | _aText in English and abstract in Arabic & English. | ||
| 650 | 7 |
_aVeterinary Medicine _2qrmak |
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| 653 | 0 |
_aClimate change _aMicroclimate _aSustainability |
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| 700 | 0 |
_aZakia Attia Mohamed Ahmed _ethesis advisor. |
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| 700 | 0 |
_aMahmoud Abd-Elaty Mahmoud Khalf _ethesis advisor. |
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| 700 | 0 |
_aMohammed Abdelhameed M Kamal _ethesis advisor. |
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| 900 |
_b01-01-2024 _cZakia Attia Mohamed Ahmed _cMahmoud Abd-Elaty Mahmoud Khalf _cMohammed Abdelhameed M Kamal _UCairo University _FFaculty of Veterinary Medicine _DDepartment of Veterinary Hygiene and Management |
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| 905 |
_aEman El gebaly _eEman Ghareb |
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| 942 |
_2ddc _cTH _e21 _n0 |
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| 999 | _c172006 | ||