Epizootiology Of Newcastle Disease In Free Flying Birds Of Pakistan
By: Muhammad Arshad
| Dr. Muhammad Ajmal.
Contributor(s): Mr. Mubbasher | Mr. Muhammad Naeem | Faculty of Veterinary Sciences.
Material type: 
BookPublisher: 1984Subject(s): Department of MicrobiologyDDC classification: 1143,T Dissertation note: Epizoàtiology of Newcastle disease was studied in 105 birds each of three species of free flying birds i.e. pigeon, starling and sparrow. Incidence of Newcastle disease was measured on the basis of Haemagglutination Inhibiting antibodies against Newcastle disease virus present in the serum of each bird. It was observed that 42.86% of pigeon, 25.71% of sparrows and 21.90% of starlings were positive for Newcastle disease. An attempt was also made to isolate the virus from faecal material and pooled organs (lung,liver and spleen) of each bird in developing chick embryo. Three strains of Newcastle disease virus, 2 from pizeon and one from starling were isolated. One pigeon having virus in its organs was also found excreting Newcastle disease virus in its faeces. No virus could be isolated from sparrows. The pathogenicity of isolates was studied in day-old chicks by intracerebral inoculation and it was observed that all of the three isolates were moderately pathogenic Though non significant, the percentage of positive cases on the basis of Haemagglutination Inhibition test in male birds was found to be higher than female birds of the same species
From the tudy it was evident that pigeon could play an important role in the transmission of Newcastle disease. The other two species were also susceptible to this virus and could be source of transmission. It recommended that these as well as other species of the ree flying birds in a large number from much wider areas may be studied. It is further recommended that birds found dead in the field and pet bird markets may be investigated for virus isolation.
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Thesis
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UVAS Library Thesis Section | Veterinary Science | 1143,T (Browse shelf) | Available | 1143,T |
Epizoàtiology of Newcastle disease was studied in 105 birds each of three species of free flying birds i.e. pigeon, starling and sparrow. Incidence of Newcastle disease was measured on the basis of Haemagglutination Inhibiting antibodies against Newcastle disease virus present in the serum of each bird. It was observed that 42.86% of pigeon, 25.71% of sparrows and 21.90% of starlings were positive for Newcastle disease. An attempt was also made to isolate the virus from faecal material and pooled organs (lung,liver and spleen) of each bird in developing chick embryo. Three strains of Newcastle disease virus, 2 from pizeon and one from starling were isolated. One pigeon having virus in its organs was also found excreting Newcastle disease virus in its faeces. No virus could be isolated from sparrows. The pathogenicity of isolates was studied in day-old chicks by intracerebral inoculation and it was observed that all of the three isolates were moderately pathogenic Though non significant, the percentage of positive cases on the basis of Haemagglutination Inhibition test in male birds was found to be higher than female birds of the same species
From the tudy it was evident that pigeon could play an important role in the transmission of Newcastle disease. The other two species were also susceptible to this virus and could be source of transmission. It recommended that these as well as other species of the ree flying birds in a large number from much wider areas may be studied. It is further recommended that birds found dead in the field and pet bird markets may be investigated for virus isolation.
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