Dental caries status of young children in a suburban community of Mexico City.

One hundred and thirty-four children, 6 to 7 yr of age from a public school in Tepepan, Mexico were examined for the prevalence and severity of dental caries. Average deft score was 6.08 and defs was 12.

Electrocorticographic and behavioral features of turtle parenteral penicillin epilepsy.

The epileptogenic action of parenteral penicillin was studied in turtles with electrodes chronically implanted in both cerebral hemispheres. Penicillin was administered intraperitoneally at doses of 200,000 to 1,600,000 IU/kg. Doses higher than 600,000 IU/kg caused the appearance on the electrocorticogram of bilateral sharp waves or biphasic spikes, sometimes more pronounced in one hemisphere.

DR, C4, and Bf allotypes in juvenile rheumatoid arthritis.

HLA-DR, C4, and Bf typing was performed in 99 patients with juvenile rheumatoid arthritis (JRA). DR1 was found with higher frequency in patients with polyarticular JRA than in controls (P less than 0.05).

The epidemiology of minor illnesses among medical students.

A cohort of 126 third-year medical students was followed for a year by means of self-administered questionnaires at the end of major clinical clerkships to ascertain the frequency and duration of the symptoms of their minor illnesses. Students reported an average of 4.36 illnesses per person per year, more than 80 percent of which were upper respiratory episodes.