Yersinia pestis

they get from humans, the only quality which make them incredibly dangerous to beings. Although, the majority think that the rats bring this disease, they don’t. The fleas on the rats were the ones that first infect the rats with the bacterium Yersinia Pestis. The bacterium circulates among areas where rodents live in great numbers known as “plague focus” or “plague reservoir” (Gale). Before finding new human hosts for the fleas to infect, they take ten to fourteen days to kill off and…

Are you aware of your breathing problems? Issues regarding Asthma Asthma, issue of the respiratory framework in which the sections that empower air to go into and out of the lungs occasionally contract, bringing on hacking, puffing, and shortage of breath. This is regularly transitory and reversible, yet in extreme assaults, asthma might bring about death. Asthma most ordinarily alludes to bronchial asthma, an aggravation of the aviation routes, yet the term is likewise used to allude to…

Centers for Disease Control and Prevention works all around the United States as an agency that promotes public health. Through this agency, we have a bioterrorism website that focuses on biological agents like bacteria, viruses, and toxins that are deliberate released making it a form of terrorism. These biological agents can be spread in three ways air, water, and food. The main disease resulting from bioterrorism is death ranging from humans, animals, and plants. The CDC Bioterrorism website…

have provided this selective pressure. This was disproven when Mecsas and colleagues performed tests on mice to see if the CCR5-Δ32 allele provided protection against Yersinia pestis, the causative agent of the plague. Mecsas and colleagues found that the CCR5-Δ32 allele did not provide the mice any protection from Yersinia pestis disproving the hypothesis that the plague could have provided the strong selective pressure scientists were looking for (Mecsas et al., 2004). Further testing by…

The Black Death, which is caused by Yersinia Pestis, originated in China and other Asian countries.According to one story, the Mongols intentionally spread the plague by catapulting their plague-ridden cadavers over the walls of Caffa in the Crimea. While this primitive act of biological warfare…

the mid-fourteenth century, the Black Death began tainting Asia, followed by north Africa and Europe, which, in turn, emerged the bubonic plague. The spreading of the sickness was due to flea infested rats who were host to the deadly bacterium, Yersinia pestis. In Europe, the bubonic plague killed 50 to 60 percent of its victims and caused economical, social, political and cultural upheaval (Spielvogel,…

The Black Death was the event in European and world history caused by a terrible strain of the bubonic plague (Yersinia Pestis) that quickly spread across Europe in the mid-1300s. Smaller breakouts of the plague had happened before and after the 1300s, however, the Black Death of the mid-1300s was the most notable as over twenty million people were killed in a period spanning from 1347-1352 alone, or about one third of Europe’s population, and anywhere from fifty million to one hundred million…

Norway rats - Their effects Invasive, Non-native, and native species are all organisms that exist on our planet. They each come from different backgrounds, and influence each other directly, whether it be positive or negative. Native species are organisms which normally live and thrive in a particular community, while a non-native species are organisms which live outside their native distributional range. Non-native species are not necessarily invasive. Invasive species differ from regular…

Plague, the mass killer. It strikes where it pleases and takes the lives of millions. Pain and suffering follow in its path. The Bubonic Plague’s origin, widespread transmission, and population decline caused it to be Europe’s most horrible pandemic, paving the way for advancement in sanitation and medicine. The first historical accounts of the Bubonic Plague were in Central Asia in 1338. By the early 1340’s it had already struck China, India, Persia, Syria, and Egypt. The plague was…

Kayla Balcerak Professor Clinton December 14, 2017 Final Exam Essay All throughout history there have been many people, communities, and events and circumstances that have acted as an agent of change. Furthermore, there are some aspects that have been greatly recognized while others have been overlooked. In class we talked about many different topics some commonly known and others that aren't so common. Each and every aspect of history impacts change somehow and can more than likely be…