Early-stage development of auditory center: an experimental study of auditory evoked electrophysiologic recordings from fetal and newborn guinea pigs.

Five guinea pig fetuses at 8 weeks' gestation (term is 9 weeks) were tested for auditory brain stem response (ABR) generated by earphones placed outside the maternal abdomen. The results obtained from these fetuses were compared with the ABRs in 10 term newborn guinea pigs on the 1st and 20th day after delivery. The ABRs indicated a decreasing peak latency over wave III with increasing age.

Influenza A virus binding to human neutrophils and cross-linking requirements for activation.

Although neutrophils are not viewed as a principal defense against influenza A virus (IAV) infection, their interactions are both complex and clinically relevant. Activation of the neutrophil is distinctive from that described for chemoattractants. To more fully characterize the pathway by which IAV stimulates the human neutrophil, we have examined its binding characteristics.

A proposed new paracentesis electrode for the measurement of foetal auditory brain stem response: a preliminary report.

A proposed new electrode for measurement of foetal auditory brain stem response (ABR) is presented, the structure of which resembles a syringe needle. It can be placed subdermally in the head of the guinea pig foetus through the wall of the maternal abdomen. In the anterior end of the electrode a special device similar to a hook is situated.

Can peritoneal B cells be rendered unresponsive?

Ly-1+ B cells have been reported to produce a number of autoantibodies, and to be involved in the selection and regulation of the conventional B cell repertoire. It is not known if these B cells, which are found in high numbers in the peritoneum of normal adult mice, themselves can be regulated. In this study, we evaluated the sensitivity of peritoneal B cells (PBCs) versus conventional splenic B cells to regulation in a model system for tolerance.

The Cronkhite-Canada syndrome with focus on immunity and infection. Report of a case.

A 64-year-old man developed diffuse gastrointestinal polyposis, protein-losing enteropathy, skin pigmentation, hair loss, and unique nail changes. He also exhibited pulmonary tuberculosis and impaired immunity with skin anergy, poor lymphocyte mitogens stimulation test, and low serum immunoglobulin. We discuss the relationship of infection, nutrition, immunity, and the Cronkhite-Canada syndrome.