Aqueductal flow of cerebrospinal fluid (CSF) and anatomical configuration of the cerebral aqueduct (AC) in patients with communicating hydrocephalus--the trumpet sign.

Purpose: We explore the relationship of aqueductal flow of cerebrospinal fluid (CSF) and the changes of the anatomical configuration of the cerebral aqueduct (AC) in patients with communicating hydrocephalus (CH) in a routine MRI setting.

Methods/patients: We performed a retrospective evaluation of different anatomical configurations of the AC on midsaggital MRI images in 43 patients (medial age 67 years, median 68 years, range from 14 to 85, 25 women) with suspected communicating hydrocephalus and compared the anatomical form of the AC on the sagittal sequences with MRI CSF flow data. The measured acqueductal cross sectional area was correlated (Pearson's correlation coefficient, which is a measure of the linear dependence between two variables, is 0.

Cadaveric-biomechanical evaluation of bone-implant construct of proximal humerus fractures (Neer type 3).

Background: A biomechanical cadaver study was performed to test the stability and strength of screw osteosynthesis of surgical neck fractures of the humerus.

Methods: After bone density measurement, 64 cadaver proximal humerus bones were bent to create a subcapital fracture. The fracture was then stabilized by means of screw osteosynthesis randomly assigned to subgroups of screw positioning, size of screw, and stress test (torsion/bending).

Comparative pathogenicity of Actinomyces naeslundii and Actinomyces israelii.

Typical actinomycosis has been produced in mice following single intraperitoneal injections of saline suspensions of Actinomyces israelii and A. naeslundii. A.

Actinomyces naeslundii as an agent of human actinomycosis.

The repeated isolation of Actinomyces naeslundii from clinical materials associated with disease led to a comparison of isolates from the normal mouth with isolates from pathological clinical materials not from the mouth area. No important differences were observed between the isolates from these two sources. A human case of empyema of the gall bladder, apparently due to A.

Characterization of Actinomyces israelii serotypes 1 and 2.

In a previous serological study, we compared 14 isolates of Actinomyces israelii serotype 2 with 13 serotype 1 cultures. The present study reports the morphological, physiological, and biochemical characteristics of these same 27 cultures. All of the isolates exhibited similar cellular morphology, and all but one produced the typical spider type microcolony on solid media.

Determination and analysis of Actinomyces israelii serotypes by fluorescent-antibody procedures.

This study was undertaken to determine the antigenic relationships between serotypes of Actinomyces israelii with fluorescent-antibody (FA) procedures. In addition, the antigenic relationships between A. israelii and other members of the genus Actinomyces were studied by the same methods.

Laboratory identification of Rothia dentocariosa and its occurrence in human clinical materials.

Fifty isolates of Rothia dentocariosa from diverse clinical sources were characterized by 28 separate tests. An attempt was made to select practical tests that could be completed in a minimal length of time. Rothia is also compared with Actinomyces and Nocardia with which it is often confused.

Identification of Actinomyces israelii and Actinomyces naeslundii by fluorescent-antibody and agar-gel diffusion techniques.

This study was an attempt to develop a fluorescent-antibody (FA) test to differentiate Actinomyces israelii and A. naeslundii as an aid in their laboratory identification. Two strains of A.

IDENTIFICATION OF SPECIES OF ACTINOMYCES.

Georg, Lucille K. (Communicable Disease Center, Atlanta, Ga.), Gordon W.