Zain Ul Abadeen , Muhammad Tariq Javed , Tariq Jamil , Syed Muhammad Faizan
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引用次数: 0
Abstract
The present study was designed to evaluate the immunoprotective role of specific egg yolk antibodies (IgYs). Eighty, day-old broiler chicks were purchased and divided into four groups (G0, G1, G2 and G3). G0 served as control negative, while C. perfringens type A (1 ×108 cfu/mL) was given via oral route from days 17–19 of the experiment in group G1 (control positive). Groups G2 and G3 were passively immunized with 1 mL of anti-clostridial IgYs per bird via per os (days 21–24) and IM routes (days 22 and 24), respectively. The birds in group G1 had higher feed conversion ratio (FCR) values and reduced relative weight of immune organs. The values of various immunological assays inlcuding hemagglutination inhibition titer values against Newcastle disease virus (NDV), titer values of total immunoglobulins and IgY after anti-sheep RBCs (anti-SRBCs) injection and phagocytic potential of circulating macrophages were lower in G1 compared to G0. In groups G2 and G3 (passively immunized), these pathological alterations were comparatively less severe or absent indicating the immuno-protective role of anti-clostridial IgYs against experimental infection. The results suggest that IgYs could be an effective alternative to antibiotics for controlling necrotic enteritis in poultry, with potential benefits in view of animal health and production costs.
期刊介绍：
The journal reports basic, comparative and clinical immunology as they pertain to the animal species designated here: livestock, poultry, and fish species that are major food animals and companion animals such as cats, dogs, horses and camels, and wildlife species that act as reservoirs for food, companion or human infectious diseases, or as models for human disease.
Rodent models of infectious diseases that are of importance in the animal species indicated above,when the disease requires a level of containment that is not readily available for larger animal experimentation (ABSL3), will be considered. Papers on rabbits, lizards, guinea pigs, badgers, armadillos, elephants, antelope, and buffalo will be reviewed if the research advances our fundamental understanding of immunology, or if they act as a reservoir of infectious disease for the primary animal species designated above, or for humans. Manuscripts employing other species will be reviewed if justified as fitting into the categories above.
The following topics are appropriate: biology of cells and mechanisms of the immune system, immunochemistry, immunodeficiencies, immunodiagnosis, immunogenetics, immunopathology, immunology of infectious disease and tumors, immunoprophylaxis including vaccine development and delivery, immunological aspects of pregnancy including passive immunity, autoimmuity, neuroimmunology, and transplanatation immunology. Manuscripts that describe new genes and development of tools such as monoclonal antibodies are also of interest when part of a larger biological study. Studies employing extracts or constituents (plant extracts, feed additives or microbiome) must be sufficiently defined to be reproduced in other laboratories and also provide evidence for possible mechanisms and not simply show an effect on the immune system.
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