living matter.

FOOTNOTES:

[1] The comparison here is with the atrium of a Pompeiian house.




CHAPTER VIII

SECONDARY, TERMINAL AND MIXED INFECTIONS.--THE EXTENSION OF INFECTION
IN THE INDIVIDUAL.--TUBERCULOSIS.--THE TUBERCLE BACILLUS.--FREQUENCY
OF THE DISEASE.--THE PRIMARY FOCI.--THE EXTENSION OF BACILLI.--THE
DISCHARGE OF BACILLI FROM THE BODY.--INFLUENCE OF THE SEAT OF DISEASE
ON THE DISCHARGE OF BACILLI.--THE INTESTINAL DISEASES.--MODES OF
INFECTION.--INFECTION BY SPUTUM SPRAY.--INFECTION OF WATER
SUPPLIES.--EXTENSION OF INFECTION BY INSECTS.--TRYPANOSOME
DISEASES.--SLEEPING SICKNESS.--MALARIA.--THE PART PLAYED BY
MOSQUITOES.--PARASITISM IN THE MOSQUITO.--INFECTION AS INFLUENCED BY
HABITS AND CUSTOMS.--HOOKWORM DISEASE.--INTER-RELATION BETWEEN HUMAN
AND ANIMAL DISEASES.--PLAGUE.--PART PLAYED BY RATS IN
TRANSMISSION.--THE PRESENT EPIDEMIC OF PLAGUE.


The infectious diseases are often complicated by secondary infections,
some other organism finding opportunity for invasion in the presence
of the injuries produced in the primary disease. In many diseases,
such as diphtheria, scarlet fever and smallpox, death is frequently
due to the secondary infection. The secondary invaders not only find