Page 120 - Primary Five Science

Typhus

An infectious disease caused by bacteria called rickettsia, char-

acterized by a purple rash, headaches, fever

Spread when lice bites an infected person and then it bites a

health person

Plague

Plague is an infectious disease caused by

the bacterium Yersinia pestis. Symptoms include fe-

ver, weakness and headache. Usually this begins one to

seven days after exposure.

Spread by rat fleas

Rabies

A contagious and fatal viral disease of dogs and other mam-

mals, transmissible through the saliva to humans and causing
madness and convulsions.

Caused by a virus which affects the nerv-

ous system.

The disease spreads by a bite of

an infected dogs and other ani-

mals especially wild ones.