Effect of So-Called Chicken Anemia Agent Maternal Antibody on Chick Serologic Conversion to Viruses in the Field

Goodwin, Mark; Smeltzer, Martin A.; Brown, John; Girshick, Theodore; McMurray, Birch L.; McCarter, Steve

doi:10.2307/1591684

Cited by 13 publications

(6 citation statements)

References 10 publications

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“…In relation to mortality and feeding conversion, the results found here were similar to those previously reported, i.e., there is no significant difference in mortality (3,4,6) and in feeding conversion (3,4,5) if we compare birds born positive or negative to antibodies against the CAV under the commercial raising facilities. As for final average weight, the results we found differ from those of previous researches, which have found no difference (3,4) or found significant difference in the weights of birds born with maternal antibodies (5,6).…”

Section: Discussionsupporting

confidence: 90%

Performance comparison between broilers positive and negative for antibodies against the chicken anemia virus

Rubin¹,

Avila²,

Ribeiro³

et al. 2003

Braz. J. Microbiol.

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The chicken anemia virus (CAV) is present in virtually every country investigated, Brazil including. The aim of this study was to determine what the difference in performance is between positive (progeny of breeders vaccinated or with natural infection) and negative broilers to the presence of antibodies against the CAV in currently intensive raising systems. As a result, it was observed that negative broilers were significantly heavier than positive broilers. Negative males had a final weight 5.43% higher than positive males. There was no significant difference among different treatments in relation to parameters as mortality and feeding conversion. These study indicated that the presence of antibodies against CAV in broilers -may it be through vaccination or natural infection of breeders -did not generate progeny with superior performance under the tested raising conditions.

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Section: Discussionsupporting

confidence: 90%

Performance comparison between broilers positive and negative for antibodies against the chicken anemia virus

Rubin¹,

Avila²,

Ribeiro³

et al. 2003

Braz. J. Microbiol.

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“…(2001), in another field study, found that CAV infections in broilers are associated with increased slaughterhouse condemnation rates. However, no adverse effect attributable to CAV infection of broiler flocks was found in other published studies (Goodwin et al ., 1993;Jorgensen et al ., 1995;Hagood et al ., 2000). These different findings may reflect the presence of other factors or conditions in the flocks that could not be controlled, or that are unknown.…”

Section: Introductionmentioning

confidence: 66%

“…Bar 0/125 mm. (Goodwin et al ., 1993;Jorgensen et al ., 1995) no adverse effect of infection was found. In view of these conflicting findings, experimental studies examining the effects of CAV infection in birds at an age when they are likely to be susceptible to, and could be exposed naturally to, infection by CAV were warranted.…”

Section: Discussionmentioning

confidence: 99%

Chicken anaemia virus inoculated by the oral route causes lymphocyte depletion in the thymus in 3-week-old and 6-week-old chickens

et al. 2006

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“…Although peracute and acute disease forms can occur in neonatal or very young birds, the most common form is chronic disease, which affects Circoviruses 381 in the USA and Denmark, no significant effects on broiler performance were reported (Goodwin et al, 1993;Jorgensen et al, 1995a,b). Laboratory-based evidence suggests that the subclinical CAV infections of chickens (3 weeks old and older) can result in immunosuppression (McConnell et al, 1995a,b;Adair & McNulty, 1997;Adair, 2000).…”

Section: Bfdvmentioning

confidence: 99%

Circoviruses: Immunosuppressive threats to avian species: A review

2000

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Circoviruses are small, non-enveloped, icosahedral viruses that are unique among animal viruses in having circular, single-stranded DNA genomes. Their genomes are also the smallest possessed by animal viruses. The circovirus family currently comprises three members, chicken anaemia virus, porcine circovirus, and psittacine beak and feather disease virus, with pigeon circovirus being classified as a tentative member. Infections with each of the four circoviruses are associated with potentially fatal diseases in which virus-induced damage to lymphoid tissue and immunosuppression are common features. Experience with other animal virus families suggests that additional animal species will be infected by, as yet undiscovered, circoviruses and that these may display similar tissue tropism and disease-causing potential. Recent reports describing the association of circovirus-lik e viruses with immunodeficiency-related diseases of geese and southern black-backed gulls suggest that circovirus infections of avian species may be more common than previously recognized, and prompt the question of whether novel circoviruses infect poultry to cause clinical and/or subclinical diseases that may be economically important. This review has three purposes. First, it is designed to summarize the currently available information about the classified circoviruses and viruses that are regarded as circovirus-like. Second, it aims to alert the readership to the possibility that other avian species, including commercial poultry, may be infected with novel circoviruses. Finally, possible methods for discovering novel circoviruses and for controlling infections by such viruses are suggested.

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Effect of So-Called Chicken Anemia Agent Maternal Antibody on Chick Serologic Conversion to Viruses in the Field

Cited by 13 publications

References 10 publications

Performance comparison between broilers positive and negative for antibodies against the chicken anemia virus

Performance comparison between broilers positive and negative for antibodies against the chicken anemia virus

Chicken anaemia virus inoculated by the oral route causes lymphocyte depletion in the thymus in 3-week-old and 6-week-old chickens

Circoviruses: Immunosuppressive threats to avian species: A review

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