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A contagious pandemic disease caused by the bacterium, Yersinia pestis, usually transmitted by the bite of fleas from an infected host, often a rat?. The bacteria is transferred from the blood of infected rats to the Rat Flea (Xenopsylla cheopsis), the bacillus multiplies in the stomach of the flea blocking it. When the flea next bites a mammal the consumed blood is regurgitated along with the bacillus into the bloodstream of the bitten. Any serious outbreak of Plague is started by other disease outbreaks in the rodent population. During these outbreaks, infected fleas that have lost their normal hosts seek other sources of blood. |
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Bubonic plague is a contagious pandemic disease caused by the bacterium Yersinia pestis and is usually transmitted by the bite of fleas from an infected host, often a rat?. The bacteria are transferred from the blood of infected rats to the Rat Flea (Xenopsylla cheopsis). The bacillus multiplies in the stomach of the flea, blocking it. When the flea next bites a mammal, the consumed blood is regurgitated along with the bacillus into the bloodstream of the bitten animal. Any serious outbreak of Plague is started by other disease outbreaks in the rodent population. During these outbreaks, infected fleas that have lost their normal hosts seek other sources of blood. |
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The infection becomes evident 2-6 days after infection. Initial symptoms are chills, fever, headaches, and the formation of buboes. The buboes are formed by the infection of the [lymph nodes]?, which swell and become prominent. If unchecked the bacteria the bacteria infect the bloodstream (plague septicemia) and then the lungs (plague pneumonia). |
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The infection becomes evident 2-6 days after infection. Initial symptoms are chills, fever, headaches, and the formation of buboes. The buboes are formed by the infection of the [lymph nodes]?, which swell and become prominent. If unchecked, the bacteria the bacteria infect the bloodstream (plague septicemia) and then the lungs (plague pneumonia). |
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The disease still exists in wild animal populations in the [Caucasus Mountains]? in Russia, through much of the Middle East, China, Southwest and Southeast Asia, Southern and Eastern Africa, in North America from the Pacific Coast eastward to the western [Great Plains]? and from British Columbia southward to Mexico, in South America in two areas - the the Andean mountains and Brazil. There is no Plague-infected animal population in Europe or Australia. |
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The disease still exists in wild animal populations in the [Caucasus Mountains]? in Russia, through much of the Middle East, China, Southwest and Southeast Asia, Southern and Eastern Africa, in North America from the Pacific Coast eastward to the western [Great Plains]? and from British Columbia southward to Mexico, and in South America in two areas - the the Andean mountains and Brazil. There is no Plague-infected animal population in Europe or Australia. |
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