<prompt> Bipolar staining is seen in-Bacillus anthracisYersinia pestisProteus vulgarisKlebsiella pneumonia  <response>: Organisms with bipolar staining: Staining at poles better In between poorly stained like safety pin appearance Seen in: Yersinia pestis Klebsiella granulomatis Burkholderia mallei Burkhoolderia pseudomallei Vibrio parahaemolyticus Haemophilus ducreyi Yersinia pestis: Gram-negative oval coccobacilli with rounded ends surrounded by capsule. Wayson stain Giemsa: Demonstrates bipolar appearance safety pin appearance with both ends densely stained and a clear central area of the bacteria. Option 1 - Gram staining of Bacillus anthracis: Gram positive chain of bacilli arranged in bamboo stick appearance. Option 3, 4 - Proteus vulgaris or mirabilis - GNB gram negative bacteria - Klebsiella pneumonia - Capsulated GNB 