What is the Plague (Yersinia Pestis)? Here it's seen under optical microscopy X 1000. Plague is caused by Yersinia pestis bacteria. Rodents are the primary hosts of the bacteria, which is spread through fleas. Yersinia Pestis - stock photo Colonial morphology of Gram-negative Yersinia pestis bacteria grown 48 hours on a medium of sheep's blood agar (SBA), 2010.

My personal blog is Lifecyclist and my Project Habbakuk blog focuses on London in WWII. It can be a life-threatening infection if not treated promptly. The organism is transmitted to humans who are bitten by fleas that have fed on infected rodents or by humans handling infected animals. ... Yersinia pestis Give Pro. Most cases of plague in cats present with a sub-mandibular lymphadenitis. I have several blogs, but I'm rubbish at keeping them up. Diagnosis. The organism that causes plague, Yersinia pestis, lives in small rodents found most commonly in rural and semirural areas of Africa, Asia and the United States. Yersinia pestis — Colony Characteristics Sheep blood agar . The flea draws viable Y. pestis organisms into its intestinal tract. Cats are highly susceptible to plague and are a common source of Yersinia pestis infection in humans (owners and veterinarians). If you have the swollen lymph nodes (buboes) typical of bubonic plague, your doctor may use a needle to take a fluid sample from them (aspiration). PATHOGENESIS Yersinia pestis is primarily a rodent pathogen, with humans being an accidental host when bitten by an infected rat flea. These organisms multiply in the flea and block the flea's proventriculus. Plague has caused several major epidemics in Europe and Asia over the last 2,000 years. My photos are organised moderately systematically in sets and collections, which should aid navigation.
Yersinia pestis, per the WHO, is often found in small mammals and their fleas. Yersinia enterocolitica bacteria, magnified eight thousand times.

Image courtesy Centers for Disease Control (CDC) / Dr Todd Parker, Audra Marsh. Plague has most famously been called "the Black Death" because it can cause skin sores that form black scabs. Growth at 24 hours is tiny, almost invisible, shiny gray, translucent “spots.” At 48 to 72 hours, colonies are 1 to 2 mm irregular, gray-white to slightly yellow in color, and have a raised, irregular, “fried egg” appearance, which … drawing on archives, modern technology and science. Symptoms of yersiniosis are fever and pain on the right side of the abdomen for adults and in children fever, abdominal pain, and diarrhea, which is often bloody. Pneumonic plague is the most deadly form of the disease. If your doctor suspects plague, he or she may look for the Yersinia pestis bacteria in samples taken from your: Buboes. It is highly … Yersinia pestis is an obligate parasite, meaning that it cannot reproduce without a host. Dogs infected with plague are less likely to develop clinical illness than cats. BSIP/Universal Images Group/Getty Images Yersinia pestis, formerly pasteurella pestis, was the bacteria responsible for the plague.