نتایج جستجو برای: bacterial antigens
تعداد نتایج: 315802 فیلتر نتایج به سال:
O-Sulfated sialyl Lewis x antigens play important roles in nature. However, due to their structural complexity, they are not readily accessible by either chemical or enzymatic synthetic processes. Taking advantage of a bacterial sialyltransferase mutant that can catalyze the transfer of different sialic acid forms from the corresponding sugar nucleotide donors to Lewis x antigens which are fuco...
Antigen delivery has always been a challenge in scientific practice of vaccine formulation. Yet, mammalian extracellular vesicles (EVs) or bacterial membrane (MVs) provide an innovative avenue for safe and effective antigenic material. They include intrinsically loaded antigens from EV-secreting cells extrinsically onto pre-formed vesicles. Interestingly, many studies shed light on potential no...
Antibodies acquired after vaccination or natural infection with Gram-negative bacteria, such as invasive Salmonella enterica serovar Typhimurium, can protect against disease. Immunization with naturally shed outer membrane vesicles from Gram-negative bacteria is being studied for its potential to protect against many infections, since antigens within vesicles maintain their natural conformation...
Calf serum has been shown to suppress the primary immune response to erythrocytes and some bacterial antigens in mice if administered prior to and not after immunization. The importance of the route of iniection of antigens and immunosuppressant is indicated. It is suggested that immunosuppression is achieved by phagocytosis and enyzmatic destruction of the injected antigen by peritoneal macrop...
Tilapia is the world’s most extensively farmed species after carp. It an attractive for aquaculture as it grows quickly, reaching harvest size within six to seven months of production, and provides important source food revenue many low-income families, especially in low- middle-income countries. The expansion tilapia has resulted intensification farming systems, this been associated with incre...
Paraimmunity, as a reactive phenomenon of the host’s organism, induced by various heterogeneous antigens – due to some common antigenic components – appears alongside specific immunity. In bacterial and viral immunology paraimmunity is better known and studied than in parasitic immunology. It is known that, generally speaking, paraimmunity appears simultaneously with specific immunity, induced ...
Microorganisms such as bacteria that penetrate the epithelial surfaces of body for first time are met immediately by cells and molecules can mount an innate immune response. Phagocytic macrophages conduct defense against means surface receptors able to recognize bind common constituents many bacterial surfaces. Bacterial binding these trigger macrophage engulf bacterium also induce secretion bi...
A bacterial strain, tentatively identified as an Actinobacillus species, was found to asymptomatically colonize the pharynx of some rats and to bear cell wall antigens which cross-react with noncapsular antigens of Haemophilus influenzae type b (HIb). The cross-reacting antigens appeared to be a heterogeneous mixture with varying molecular size and charge. The antigenic moieties are probably ca...
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