Question

Insect which spread plague

Answer 1

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Explanation:

Answer 2

Answer:

The disease is caused by a bacterium, Yersinia pestis (Lehman & Neumann). The pathogen is transmitted by fleas, particularly the oriental rat flea, Xenopsylla cheopis (Rothschild), but it also can be transmitted from human to human in its pneumonic form (a lung infection).

Explanation:

Plague primarily is a disease of rodents. Under certain circumstances, however, plague can be introduced to humans, where it is devastating. Fleas that have fed on plague-infected rats or other rodent species become infected. Plague bacilli multiply in the gut of the flea, and, if humans are in close association with infected rats, the fleas may attempt to feed on them. During feeding, the plague bacilli are introduced into the victim. In humans, after the bacteria are introduced, the onset of the disease usually occurs in three to four days.