Immune Responses Related to the Hamster Lung
The respiratory tract is exposed continuously to immunogenic and infectious agents. The host controls these potentially harmful agents by nonspecific and immune defense mechanisms. It is known that nonspecific mechanisms involve filtration, mucocilliary movement and active phagocytosis and that these nonspecific defenses may be amplified and directed by specific immune responses (1). The lower respiratory tract generally is protected by the defense mechanisms of the upper respiratory tract. This protection, however, is not always complete, and it now appears that the lower respiratory tract (lung) may have unique mechanisms for protection (2).
KeywordsInfluenza Virus Lymphoid Tissue Hilar Lymph Node Allantoic Fluid Peripheral Lymph Node
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