Influence of Infectious Bursal Disease on the Development of Immunity to Eimeria tenella

Wi, Anderson; Wm, Reid; Pd, Lukert; Oj, Fletcher

doi:10.2307/1589423

Cited by 31 publications

(11 citation statements)

References 14 publications

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“…Infection of specific pathogen free chicks with IBDV at either 1 or 7 days of age diminished protection against coccidiosis stimulated by administration of a low level (300 oocysts/bird/day) of Eimeria tenella over a 14-day period. Chickens infected with IBDV at either 1 or 7 days showed lower bursal mass and higher E. tenella lesion scores following challenge than non-IBD infected, E. tenella-vaccinated controls (Anderson et al, 1977). Cryptosporidiosis caused by Cryptosporidium baileyi is an emerging condition in areas with high poultry density.…”

Section: Immunosuppression and Interaction Of Ibdv With Other Pathogensmentioning

confidence: 98%

Infectious bursal disease

Lasher¹,

Shane

1994

World's Poultry Science Journal

104

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Infectious bursal disease (IBD), caused by an avibirnavirus, has been an economically significant, widely distributed condition affecting immature chickens since 1960. The classical type 1 conventional strain is responsible for up to 5% mortality in susceptible flocks. As a result of immunosuppression, growth rate, liveability, and productivity may be adversely affected by subsequent exposure to a wide range of viral, bacterial, and protozoal agents. The emergence of highly pathogenic strains of IBD virus in 1988 caused heavy losses in broiler and replacement breeder and commercial egg pullets in Europe, and subsequently in Africa and Asia. The causal virus is extremely lymphocidal with an affinity for immature B cells resulting in bursal atrophy approximately four days after infection. IBD virus is resistant to environmental exposure and is transmitted laterally by direct and indirect contact between infected and susceptible flocks. Conventional IBD is controlled by immunization of parent stock followed by vaccination of progeny after maternal antibody levels have waned. Parent level stock is immunized by one or two successive doses of live, mild or intermediate strain, attenuated vaccine to prime the immune system, followed by inactivated oil emulsion vaccines at maturity and at the mid-point of the laying cycle to boost immunity and ensure transfer of protective maternal antibody to progeny. Highly pathogenic IBD is controlled by a number of alternative strategies, including administration of live vaccines of low attenuation or simultaneous doses of live intermediate strain attenuated vaccine with inactivated oil emulsion during the first week. All successful programmes require diligent care regarding handling and administration of vaccine. Serological monitoring using automated ELISA technology is an accepted method of confirming that flocks are adequately protected. In the future recombinant and subunit vaccines will be developed to control existing strains and the variants which will emerge in areas with a high density of poultry production. . (1988) Comparative studies on structural and antigenic properties of two serotypes of infectious bursal disease virus. Journal of General Virology 69: BENTON, W. J., COVER, M. S. and ROSENBERGER, J. K. (1967a) Studies on the transmission of the infectious bursal agent (IBA) of chickens. Avian Diseases 11: 430-438 BENTON, W. J., COVER, M. S., ROSENBERGER, J. K. and LAKE, R. S. (1967b) Physico-chemical properties of the infectious bursal agent (IBA) Avian Diseases 11: 438-445 BENGELSDORFF, H-J. and BERNHARDT, D. (1971) Serological examinations after vaccination of chicks with mouse-adapted infectious bursitis virus. Proceedings of the 19th World Veterinary Congress, Mexico City, Mexico 2: 786-787 BOX, P. (1988) Antibody profile of broiler breeders hens and their progeny immunized with bursalderived or embryo-origin killed infectious bursal disease vaccine.

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Section: Immunosuppression and Interaction Of Ibdv With Other Pathogensmentioning

confidence: 98%

Infectious bursal disease

Lasher¹,

Shane

1994

World's Poultry Science Journal

104

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“…It has been shown that immunosuppressive diseases or conditions may act in concert with Eimeria to produce a more severe coccidiosis. Marek's disease may interfere with development of immunity to coccidiosis (Rice and Reid, 1973), and infectious bursal disease may exacerbate coccidiosis (Anderson et al, 1977;McDougald et al, 1979).…”

Section: Coccidiosismentioning

confidence: 99%

Factors Affecting Intestinal Health in Poultry

2008

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The gastrointestinal (GI) tract has the most extensive exposed surface in the body and is constantly exposed to a wide variety of potentially harmful substances. The GI tract acts as a selective barrier between the tissues of the bird and its luminal environment. This barrier is composed of physical, chemical, immunological, and microbiological components. A wide range of factors associated with diet and infectious disease agents can negatively affect the delicate balance among the components of the chicken gut and, as a result, affect health status and production performance of birds in commercial poultry operations. Phasing out of antibiotic growth promoters from poultry diets in Europe and recent moves toward reduction or removal of these compounds in other parts of the world including North America will likely change the microbial profile of the GI tract environment in commercial poultry. This paper reviews the GI tract from developmental, immunological, and microbial standpoints and then discusses factors that can affect health status of this system. Necrotic enteritis and coccidiosis and their interactions, and possible consequences of antibiotic growth promoter removal from poultry diets with respect to these diseases, are discussed in more detail.

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“…The absence of clinical signs may be due to the degree of immunosuppression and/or an age resistance. IBD induced immunosuppression in broilers has been associated with a variety of clinical syndromes, such as chronic respiratory disease, coccidiosis (Anderson et al, 1977), inclusion body hepatitis (Fadly et al, 1976) and gangrenous dermatitis (Rosenberger et al, 1975). Such diseases are usually seen at 4 weeks of age, subsequent to immunosuppression caused by natural IBD virus infections, which occur when maternal antibodies wane (McFerran, 1989).…”

Section: Discussionmentioning

confidence: 99%

Economic effects of subclinical infectious bursal disease on broiler production

McIlroy¹,

Goodall²,

McCracken³

1989

Avian Pathology

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A survey of the infectious bursal disease (IBD) status of 85 clinically normal broiler flocks was carried out. Flocks were grouped into three categories: flocks without IBD lesions (category A), flocks with typical acute IBD lesions (B) and flocks with typical chronic IBD lesions (C). Category A flocks achieved a net income per 1,000 birds which was 11% better (P<0.05) than category B flocks and 14% better (P<0.01) than category C flocks. The 85 broiler houses used by the surveyed flocks during production were similarly grouped into the three categories. Analysis of production data from 991 flocks comprising 14 million birds demonstrated that flocks reared in category A houses achieved a similar superiority in net income per 1,000 birds over those flocks reared in both category B and category C houses. Food conversion ratio and average weight per bird were also superior in flocks reared in category A houses. These findings suggest that IBD virus persisted from flock to flock in category B and category C houses. The differences in performance were greatly accentuated during the winter months. The results indicate that the presence of IBD virus infection accounts for about two-thirds of the reduced profitability achieved by broiler flocks in Northern Ireland during the winter.

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Influence of Infectious Bursal Disease on the Development of Immunity to Eimeria tenella

Cited by 31 publications

References 14 publications

Infectious bursal disease

Infectious bursal disease

Factors Affecting Intestinal Health in Poultry

Economic effects of subclinical infectious bursal disease on broiler production

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