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Humoral immunity is not critical for protection against experimental infection with Sarcocystis neurona in B-cell-deficient mice. | LitMetric

AI Article Synopsis

Article Abstract

Immunodeficient B-cell-deficient mice (mmuMT) were infected with Sarcocystis neurona merozoites to determine the role of B cells and the humoral immune response in protective immunity. As expected, the mice did not seroconvert based on a direct agglutination test. Infected mice did not have significant changes in gross pathology at the time points examined. Histologic changes included mild perivascular and peribronchial infiltrate in the lungs; perivascular infiltrate and mild inflammatory sinusoidal foci in the liver; prominent high endothelial venules in the lymph nodes; and moderate cellular expansion of the periarteriolar sheaths (PALS) in the spleen. Changes resolved by day 60 postinfection. Mice developed significant CD4 and CD8 responses in lymphoid organs, including significant effector (CD45RB(high)) and memory (CD44(high)) CD4 and CD8 responses. Flow cytometry confirmed the lack of B cells. Overall, these data suggest that B cells are not critical to the protective immune response to SN infection.

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http://dx.doi.org/10.1645/GE-488R.1DOI Listing

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