What is Yersinia pestis simple definition?
[ pĕs′tĭs ] n. A bacterium that causes plague and is transmitted from rats to humans by the rat flea Xenopsylla cheopis. Pasteurella pestis.
What are the three types of Yersinia pestis?
Plague is divided into three main types — bubonic, septicemic and pneumonic — depending on which part of your body is involved.
What is the mode of transmission of 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 bubonic plague zoonosis?
Plague is a zoonotic disease, which means it can be transmitted to humans through animals, most often through the bites of fleas or through direct contact with infected animal tissue.
Why is it called Yersinia pestis?
The genus is named for French bacteriologist Alexandre Yersin, who in 1894 discovered Pasteurella pestis (now Yersinia pestis), the causative agent of plague, which was independently isolated that same year by Japanese physician and bacteriologist Kitasato Shibasaburo.
Why is Yersinia pestis significant?
Yersinia pestis, the causative agent of bubonic plague, has three remarkable attributes. First, it causes the most severe of all human bacterial infections as judged by historical records. Second, the emergence of Y.
What are the 2 types of plague?
Plague can take different clinical forms, but the most common are bubonic, pneumonic, and septicemic. Forms of plague.
Who is susceptible plague?
Plague has occurred in people of all ages (infants up to age 96), though 50% of cases occur in people ages 12–45. Worldwide, between 1,000 and 2,000 cases each year are reported to the World Health Organization (WHO), though the true number is likely much higher.
Do squirrels carry the plague?
The most important wild rodents that can carry the disease are squirrels (especially ground squirrels), chip- munks, woodrats, mice and marmots. Plague is lethal to many rodents; therefore, any sign of sick or dead rodents is a warning that plague may be in the area.
What did the bubonic plague do to the body?
Bubonic plague causes fever, fatigue, shivering, vomiting, headaches, giddiness, intolerance to light, pain in the back and limbs, sleeplessness, apathy, and delirium. It also causes buboes: one or more of the lymph nodes become tender and swollen, usually in the groin or armpits.
