Search results
Dec 26, 2017 · Plague is caused by Yersinia pestis and is not commonly encountered in clinics, although natural plague foci are widely distributed around the world. Y. pestis has been listed as a category A bioterrorism agent. A neglected diagnosis will cause severe consequences.
Dec 29, 2023 · Gram staining reveals the presence of pus cells and Gram-negative (pink) single or short-chained pleomorphic coccobacilli with rounded ends surrounded by a capsule. Wayson or Giemsa staining demonstrates the typical bipolar or safety pin appearance. Two ends are darkly stained with a clear central area.
Major characteristics of Yersinia pestis: Gram stain morphology: Gram negative rods, 0.5 x 1-2 μm. Colony morphology: Slow growing, pinpoint colonies after 24h; colonies are 1-2 mm, gray-white to slightly yellow and opaque on BAP after 48 h; non-lactose fermenter on MAC/EMB; growing both at 25-28°C and at 35-37°C.
Apr 3, 2019 · The etiological agent of plague is the Gram-negative bacterium Yersinia pestis [ 2 ], discovered by the Institut Pasteur, bacteriologist Alexandre Yersin during a plague outbreak in Hong...
Yersinia pestis (Y. pestis; formerly Pasteurella pestis) is a gram-negative, non-motile, coccobacillus bacterium without spores that is related to both Yersinia enterocolitica and Yersinia pseudotuberculosis, the pathogen from which Y. pestis evolved and responsible for the Far East scarlet-like fever.
Wikipedia. Transcript. Content Reviewers. Contributors. Alexandru Duhaniuc, MD, Evan Debevec-McKenney, Tanner Marshall, MS. Yersinia pestis is a Gram-negative coccobacillus which belongs to a family of bacteria called the Enterobacteriaceae.
Y. pestis, whereas the Gram stain may not. The Wright-Giemsa stains are the most reliable for accurately highlighting the bipolar staining characteristics of these gram-negative rods (Fig. A2). Note that in patients with overwhelming sepsis, bipolar staining rods may be detected in peripheral blood smears. b.
