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Seven-year study of pneumococcus type incidence in the Royal Hospital for Sick Children, Glasgow

Published online by Cambridge University Press:  15 May 2009

K. J. Guthrie
Affiliation:
Assistant Pathologist, Royal Hospital for Sick Children, Glasgow
George L. Montgomery
Affiliation:
Gardiner Lecturer in the Pathology of Diseases of Infancy and Childhood, University of Glasgow; Pathologist, Royal Hospital for Sick Children, Glasgow
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This paper records the results of systematic pneumococcus typing over a 7-year period in children from 4 days to 12 years of age in the R.H.S.C., Glasgow. Strains typed include those from respiratory tract lesions, from pus in middle ears, meninges, joints, serous sacs and miscellaneous purulent foci. A series of strains from normal throats serves for comparison.

The constant prevalence year by year of types 6, 19, 1 and 23 in all types of disease is striking. On dividing the cases into those under and over 2 years, the incidence of type 1 in the older children is four times that in the younger group. Conversely in those over 2 the incidence of the higher types (21–32) is only half that in the younger patients. No other significant difference in type distribution is observed on comparing the two age groups. Group IV pneumococci are commonly carried in the healthy nasopharynx, and are potential pathogens in young children in whom broncho pneumonia is generally an endogenous infection. There is evidence that the same type of pneumococcus frequently invades the entire respiratory tract and the middle ears. Only thirty of our cases were in the neonatal period and the apparent immunity of the newborn to the pneumococcus is discussed.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1948

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