What is the mode of transmission for Yersinia pestis?
Plague is an infectious disease caused by the bacteria Yersinia pestis, a zoonotic bacteria, usually found in small mammals and their fleas. It is transmitted between animals through fleas. Humans can be infected through: the bite of infected vector fleas.
How does Yersinia pestis spread from person to person?
Pneumonic plague occurs when Y. pestis infects the lungs. This type of plague can spread from person to person through the air. Transmission can take place if someone breathes in aerosolized bacteria, which could happen in a bioterrorist attack.
Is the bubonic plague airborne?
Yersinia pestisis a gram negative, bacillus shaped bacteria that prefers to reside in an environment lacking oxygen (anaerobic). It is typically an organism that uses the process of fermentation to break down complex organic molecules to metabolize.
Does pneumonic plague still exist?
The plague is most prevalent in Africa and is also found in Asia and South America. In 2019, two patients in Beijing, and one patient in Inner Mongolia, were diagnosed with the plague, according to the Chinese Center for Disease Control and Prevention.
Why did Black Death spread so quickly?
Genesis. The Black Death was an epidemic which ravaged Europe between 1347 and 1400. It was a disease spread through contact with animals (zoonosis), basically through fleas and other rat parasites (at that time, rats often coexisted with humans, thus allowing the disease to spread so quickly).
Which animal spread the plague?
Plague bacteria are most often transmitted by the bite of an infected flea. During plague epizootics, many rodents die, causing hungry fleas to seek other sources of blood. People and animals that visit places where rodents have recently died from plague are at risk of being infected from flea bites.
Is tetanus a archaebacteria?
C. tetani spores are extremely hardy and can be found globally in soil or in the gastrointestinal tract of animals. If inoculated into a wound, C….
Is Yersinia pestis autotrophic or heterotrophic?
Y. pestis is a chemoheterotroph, meaning that it must consume organic molecules for energy and carbon.