Analyzed were serum levels of IgA, IgG, ad IgM in groups of institutionalized and noninstitutionalized Down's syndrome subjects and in institutionalized retarded children with other etiologies. (KW)

A comparison of plasma (pseudo) cholinesterase and erythrocyte (true) cholinesterase activity in 16 male childhood schizophrenic patients and 16 male nonpsychotic hospitalized controls revealed no significant differences between the two groups. (Author)

Sequential urinalysis of four premature infants with marked physiologic anemia demonstrated no erythropoietin (substances which may stimulate red blood cell formulation). (CL)

Levels of serum IgE (an immunoglobulin carrying reaginic antibody activity) were investigated in 16 Down's syndrome adolescents (12-to 18-years old) and in an equal number of retardates matched for age and sex residing in the same institution. (CL)

Banding techniques were used in follow-up chromosome studies on two adult institutionalized retardates who had been previously described as having a low ridge count due to a high number of arches on the fingertips associated with undefined chromosomal abnormalities. (CL)

Six 4- to 37-year-old patients with tuberosis sclerosis (a chronic condition characterized by siezures, intercranial calcification, a reddish-yellow sebaceous glandular mass on the face, and frequent crises in early years), did not exhibit an elevation of the (alpha + beta) globulin fraction in their serum. (Author/MC)

Presented is the case history of a newborn infant in which death from jaundice was probably connected with maternal ingestion of fava beans and large dosages of Vitamin C. (DB)

Evaluation of 222 infants with imperforate anus found an incidence of cardiovascular malformations 20 times greater than would be expected. (DB)

Paper presented at the Annual Meeting of the American Association on Mental Deficiency (92nd, Boston, 1968).