In pneumonic plague, transmission occurs from human to human by
Pneumonic plague is spread by droplet infection. The bacilli spread through the lungs producing hemmorhagic pneumonia. Cyanosis is very prominent. The bloody mucoid sputum that is coughed out contains bacilli in numerous numbers. Pneumonic plague is highly infectious and in untreated patients almost invariably fatal. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th edition; Pg: 328
Rat flea bite
Rat bite
Respiratory droplets
Discharge from wounds
Bacteriology