title: Effect of Mukteswar and Komarov strains of newcastle disease vaccines on egg production.
abstract: Effect of live mesogenic strains of Mukteswar and Komarov ND vaccines was studied on the egg production of laying birds. The results showed that pullets vaccinated with Mukteswar ND vaccine produced more eggs than the Komarov vaccinated or non vaccinated birds. The peak egg production was noted at the age of 29 weeks in these birds and this latter decreased. When birds were re-vaccinated with the same vaccine and route, at the age of 32 weeks, the egg production again increased to 81%. Intra muscular vaccination with Komarov ND vaccine demonstrated 11% less egg production than the birds vaccinated with Mukteswar ND vaccine. In all the experiments, birds were found to be severely affected by the hot weather resulting in a drop of egg production.
authors.affiliation: Vaccine Production Centre, Poultry Research Institute, Korangi, Karachi, Pakistan.
authors.forename: S F
authors.initials: SF
authors.lastname: Rehmani
authors.forename: S
authors.initials: S
authors.lastname: Firdous
authors.forename: N
authors.initials: N
authors.lastname: Parveen
authors.forename: K R
authors.initials: KR
authors.lastname: Khan
authors.forename: H A
authors.initials: HA
authors.lastname: Shaikh