The Role of some free-flying birds in the transmission and spread of Newcastle disease in Egypt
Abstract: 1- Fascal swabs were taken from 140 Egyptian doves hunted from different rural localities in kalioubia governorate.
2- 15 NDV strains were isolated from the hunted doves. The percentage of virus isolation was 10.7%.
3- Assessment of virulence of the isolates my mean death time of minimal lethal dose in chick embryos (MDT) ranged from 33.6 – 72 hours and proved that all tested strains of velogenic nature.
4- Determination of viscerotropic nature of the isolated strains by cloacal infection of two month susceptible chickens gave evidence that all the isolates were of velogenic viscerotropic NDV (VVNDN).
5- Determination of the intracerebral pathogenicity index (ICPI) in a day-old chicks revealed that all the isolates were of velogenic type. The (ICPI) ranged from 1.4-1.9 index.
6- The susceptibility of the Egyptian doves (Streptopelia senegalensis aegyptiacus) to VVNDV by different routes of experimental infection revealed that :
a- I/C inoculated doves had an incubation period (IP) of 2-3 days and showed mostly nervous symptoms and died 1-2 days after symptoms.
b- I/M inoculated doves had an IP of 2-3 days and manifested nervous symptoms and succumbed to infection 1-2 days after symptoms.
c- 1/0 inoculated doves showed nervous and occular symptoms. The IP was 10-12 days and died 1-8 days after symptoms.
d- I/N inoculated doves whoed nervous symptoms 9 days post inoculation. An inoculated dove remained unaffected and shed the virus for about 27 days.
e- Oral infection of doves developed nervous symptoms 9 days post inoculation.
f- All contact doves for each inoculated route did not contract the disease
7- Alternative cohabitation of infected doves with healthy susceptible chickens or vice versa revealed that contact in both cases is present.
8- It was proved that there is no relation between the severity of symptoms of the disease and the doses of the virus used.
Publication year 1981
Availability location القاهرة - ش السكة البيضاء - العباسية ص ب 131
Availability number
Organization Name
Country Egypt
Author(s) from ARC
External authors (outside ARC)
    احمد عبد الحميد بسيونى كلية طب بيطرى جامعة القاهرة
    محمد سعيد الصبان كلية طب بيطرى جامعة القاهرة
    احمد على سامى كلية طب بيطرى جامعة القاهرة
Agris Categories Animal diseases
AGROVOC
TERMS		 Birds. Newcastle disease.
Publication Type Master Thesis
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