Reexamination of the anterior commissure from the perspective of semantics, the anatomy of tumor spread, and connective tissue histology and embryology has reaffirmed previously published findings. In addition, this investigation of the convergence of the various structures toward the anterior commissure has led to the hypothesis that the anterior subglottic larynx may have a midline embryological origin. Whether this area should be included in the “anterior commissure” or possibly better considered as an area to which anterior commissure tumors spread is as yet undetermined.

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Summary. During the 1980s the emergence of multiple antibiotic-resistant strains of Staphylococcus aureus posed new problems for infection control worldwide, many of which still remain. In investigations of outbreaks of infection, the laboratory has a key role in identifying infected or colonised patients and staff. The rapid isolation and accurate identification of the causative organisms are essential for the implementation of appropriate control measures. Speed and accuracy in identification, by colonial morphology, is often difficult to achieve in the presence of a mixed population of commensal bacteria.To this end, the sensitivity of three media for the isolation of methicillin-resistant S. aureus (MRSA) from simulated clinical specimens was compared. Initial colonial recognition of MRSA was enhanced on methicillin-milk agar when compared with that on other media.

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