Blood smear taken from a patient with bubonic plague. Note the safety pin appearance of Yersinia pestis. Magnification ×1000.<unk> . The<unk>  is a basic fuchsin-methylene blue, ethyl alcohol-phenol microscopic<unk> ing procedure. It was originally a modified methylene blue<unk>  used for diagnosing bubonic plague. With this<unk> , Yersinia pestis appears purple with a characteristic safety-pin appearance, which is due to the presence of a central vacuole.<unk>  is used along with the Giemsa and Wright's<unk> s to rapidly detect potential biowarfare attacks. It has also been investigated as a possible cheaper and faster way to detect melioidosis. It is a useful alternative to the Gram or Loeffler's Methylene Blue<unk> s, especially for detecting Yersinia enterocolitica which is often found in contaminated food.
Wayson stain
Romanowsky stain
Bielschowsky stain
Auramine phenol stain
Movat's stain
Jones' stain
Alcian blue stain
Feulgen stain