CONTRIBUTION TO THE STUDY OF THE BEHAVIOR OF PATHOGENIC MICROBES IN HEMATOPHAGOUS INSECTS FIRST REPORT
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
The following facts were concluded from the studies on the behavior of S. suipestifer in biting insects, and especially in a rat flea, Xenopsylla cheopis 1 A flea that bites a guinea-pig infected with S. suipestifer becomes infected itself. The ingested bacilli multiply in the digestive tube of the insect, passing into the excrements where they can be preserved dry for a considerable time. 2 An infected flea that bites a healthy guinea-pig may give it the infection. 3 The guinea-pigs infected by flea bites come down with a febrile illness, usually mortal. They may also incur an infection without symptoms and particularly without febrile reaction. This infection is accompanied by septicemia. Some animals stricken by this inapparent salmonellosis are in an unstable physiological equilibrium, and even a slight traumatism may be sufficient to transform this inapparent infection into an acute type of infection.
- Anatomy and Physiology