Camac: Epoch-making Contributions, etc., 1909, p.

7 .-- Ed.) With the new technique and experimental methods, the discovery of the specific germs of many of the more important acute infections followed each other with bewildering rapidity: typhoid fever, diphtheria, cholera, tetanus, plague, pneumonia, gonorrhoea and, most important of all, tuberculosis.

It is not too much to say that the demonstration by Koch of the "bacillus tuberculosis" (1882) is, in its far-reaching results, one of the most momentous discoveries ever made.
Of almost equal value have been the researches upon the protozoan forms of animal life, as causes of disease.

As early as 1873, spirilla were demonstrated in relapsing fever.

Laveran proved the association of haematozoa with malaria in 1880.