A severe form of hypersensitivity to para-aminosalicylic acid in patients with tuberculosis was studied. The blood picture, lymph node biopsies, and imprints are described. The similarities between this hypersensitivity to a simple chemical and infectious mononucleosis and infectious hepatitis are discussed. The possibility is suggested that some of the findings in viral diseases are due to hypersensitivity to chemical substances derived from the virus rather than to infection per se.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.