IT has been known for many years that haemophili can be isolated from the mouth. Pritchett and Stillman (1 9 19), for example, recovered these organisms from 55 of 231 saliva specimens, and Fleming and Maclean (1930), in one of the earliest studies in which an antibiotic was utilised for selective isolation, concluded that haemophili were part of the normal flora.Despite this, recent monographs and textbooks that contain detailed accounts of the bacteriology of the mouth either fail to mention haemophili at all (Bisset and Davis, 1960; Nolte, 1968) or state that they are occasionally present in small numbers (Burnett and Scherp, 1968). In this laboratory, haemophili are isolated by routine methods from approximately one-third of all oral clinical specimens submitted for investigation. No special methods are employed to recover haemophili, and indeed most strains are detected simply because their colonies resemble those of beta-haemolytic streptococci. Of 424 consecutively isolated strains 385 (90.8 per cent.) were identified as Haemophilus parahaemolyticus and 39 (9.1 per cent.) were non-capsulated H . influenzae.

Corporate campuses have been justified on many grounds, including lower operational costs, greater flexibility, stronger corporate branding and enhanced cross‐functional communication. Despite the tens of millions of dollars spent to acquire and develop them, little research exists that has systematically tested the validity of the benefits attributed to a corporate campus. This paper reports on an initial set of case studies examining one potential benefit of a corporate campus: the nature and extent of communication across organisational units. The results suggest that the amount of cross‐unit communication on a corporate campus may be less than expected. Implications for workplace and collocation strategies are discussed.

Summary. The effect of C02 on the growth of 31 strains of Candida albicans was studied in serum and in a defined medium containing urea, ammonium chloride, asparagine, glutamine or acetamide as the nitrogen source. C02 10% enhanced the mycelial growth of all strains when the medium contained an appropriate constituent to mediate its effect. The effect of C02 was most clearly demonstrated at 30°C when it induced a characteristic growth form consisting of a single swollen blastospore giving rise to a long, unbranched mycelial tube with few secondary blastospores; in atmospheric concentrations of CO;! only blastospore growth occurred. Growth in the blastospore form was more rapid in C02 10% than in air. Bicarbonate ions had no effect on mycelium formation. The result suggest that the induction of germ-tubes and mycelial growth is essentially a physical phenomenon caused by the intracellular accumulation of C02 in limited nutrient conditions, a view consistent with other reported laboratory and clinical findings.

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