<prompt> All organisms shows bipolar staining except -Calymmatobacter granulomatisY. pestisPseudomonas malleiH. influenzae  <response>: Ans. is d i.e., H. influenzae Bipolar staining safety pin appearanceo Some bacteria display a safety pin appearance due to the accumulation of dye at the poles of the cells,o This characteristic is called bipolar staining.o Bacteria showing bipolar staining are-1. Calymmatobacter granulomatis Donovani granulomatis4. Vibrio parahemolyticus2 Pseudomonas mallei5. Yersinia pestis3. Pseudomonas pseudomallei6. H. ducreyi 