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This book was published primarily as an elementary textbook and guide for public health field workers employed by the South African Railway Administration, to facilitate their systematic classification of the "more important bacteria, protozoa, helminths, molluscs, arthropods and vertebrates which are either the direct causative agents of disease or which serve as vectors, hosts or reservoirs of infection in South Africa." It was not intended for nor is it adequate for use as, an authoritative manual for positive identification of species.
The section on public health bacteriology touches on the fundamental classification of micro-organisms, their habitats and pathogenicity. The bacteriologic nomenclature employed is not modern. Fundamentals of immunology are also included in this section of 96 pages.
The larger section on public health parasitology reflects the importance of protozoa, helminths, insects and rodents as agents and vectors of disease in that area. The author has included descriptions of a few
Public Health Bacteriology and Parasitology. JAMA. 1950;142(11):858. doi:10.1001/jama.1950.02910290086043