The Effect of Newcastle Disease on Egg Production and Egg Quality

Berg, Lawrence R.; Bearse, Gordon E.; Hamilton, C. M.

doi:10.3382/ps.0260614

Cited by 23 publications

(15 citation statements)

References 2 publications

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“…The maintenance of egg shell thickness in the injected birds as compared to the decrease in the controls is evidence that chronic respiratory disease affects shell quality as well as egg production. In this respect it is similar to other respiratory diseases which have been reported to affect these two factors such as Newcastle (Lorenz and Newlon, 1944;Berg, Bearse and Hamilton, 1947), infectious bronchitis (Van Roekel et al, 1951;Gordeuk and Bressler, 1950) and infectious coryza (Taylor et al, 1953), but differs in that albumen quality is unchanged.…”

Section: Discussionsupporting

confidence: 56%

The Effect of Injections of an Oil Suspension of Terramycin on Egg Production and Egg Quality in Hens Affected with Chronic Respiratory Disease

Carson¹,

Eaton²,

Luginbuhl

1954

Poultry Science

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Section: Discussionsupporting

confidence: 56%

The Effect of Injections of an Oil Suspension of Terramycin on Egg Production and Egg Quality in Hens Affected with Chronic Respiratory Disease

Carson¹,

Eaton²,

Luginbuhl

1954

Poultry Science

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“…It has been shown that egg production drop is a functional manifestation of the structural damage caused by NDV replication in the reproductive tract (Berg et al, 1947;Knox, 1950). This study has practical implications in countries like India where poultry farmers spent a lot of money in repeated vaccinations against NDV to induce very high HI titres on the assumption that such high levels are needed for protection against NDV-induced drop in egg production.…”

Section: Discussionmentioning

confidence: 91%

“…All the earlier studies with NDV involving reproductive tract were done using drop in egg production or quality as the indicator of pathology of the reproductive tract (Berg et al, 1947;Knox, 1950;Chubb and Cumming, 1982). However, in the present study the actual histopathological changes induced by NDV or absence of changes due to protection by di¡erent HI antibody levels were taken as the criteria to measure protection of the reproductive tract (direct damage instead of manifestation of the damage).…”

Section: Introductionmentioning

confidence: 98%

Protection of the Reproductive Tract of Young Chicks by Newcastle Disease Virus-induced Haemagglutinationinhibition Antibodies

Raghul

Raj²,

Manohar

et al. 2006

Vet Res Commun

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The present study was conducted to assess the haemagglutination-inhibition (HI) titres required to protect the chicken reproductive tract against direct damage caused by Newcastle disease virus (NDV). Precociously induced oviduct and uterus by oestrogen treatment of young chicks were used to assess the damage or protection against the damage by analysis of ciliostasis or histopathological lesions. Unvaccinated day-old female white leghorn chickens were used as the maternally derived antibody (MDA) group. Chickens were vaccinated with either a live lentogenic vaccine on day 14 of age or, along with it, an inactivated vaccine at day 36 of age, to generate birds with a range of primary or secondary response induced HI antibodies. Birds with different HI antibody levels were challenged with virulent NDV. It was found that a HI antibody titre of 128 and above was protective against direct damage of the reproductive tract, while the 32-64 titre range was protective when derived through secondary vaccination only.

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“…ND causes a sudden and drastic drop in egg production and quality, and a mortality from 0 to 50% in layers (Beach, 1942;Lorenz & Newlon, 1944;Berg et al, 1947;Biswal & Morrill, 1954;Beard & Brugh, 1975). The greatest loss among laying birds frequently results from reduced egg production and impaired eggshell and albumen quality.…”

Section: Introductionmentioning

confidence: 97%

An in vitro and in vivo evaluation of the virulence of Newcastle disease virus and vaccines for the chicken reproductive tract

2002

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The virulence of two vaccine strains and two field strains of Newcastle disease virus (NDV) for the female reproductive tract of chickens was assessed using oviduct organ cultures (OOC) prepared from precociously-induced oviducts in young chicks by oestrogen treatment. Ciliostasis, haemagglutination and virus isolation from infected OOC supernatants, histopathology and immunoperoxidase test results indicated the pathogenic nature of both vaccine and virulent NDVs for the precocious oviducts. The virulent viruses, mesogenic and lentogenic vaccines caused damage in that order of magnitude and the uterus had a higher susceptibility than oviducts. One virulent and the mesogenic strain of NDV were used for in vivo trials. The pathogenicity was assessed in oestrogen-treated infected chickens using histopathology and immunoperoxidase test. The vaccine virus produced transient damage up to 6 days post-infection, while the damage with the virulent isolate persisted for at least 9 days post-infection. This technique could be a pointer to possible variations in virulence of NDV vaccine and field strains, and warrants further investigation. The potential value of OOC from young chickens for testing the possibility of NDV vaccines causing damage by themselves and offering protection against damage of the reproductive tract caused by virulent isolates is emphasized.

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The Effect of Newcastle Disease on Egg Production and Egg Quality

Cited by 23 publications

References 2 publications

The Effect of Injections of an Oil Suspension of Terramycin on Egg Production and Egg Quality in Hens Affected with Chronic Respiratory Disease

The Effect of Injections of an Oil Suspension of Terramycin on Egg Production and Egg Quality in Hens Affected with Chronic Respiratory Disease

Protection of the Reproductive Tract of Young Chicks by Newcastle Disease Virus-induced Haemagglutinationinhibition Antibodies

An in vitro and in vivo evaluation of the virulence of Newcastle disease virus and vaccines for the chicken reproductive tract

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